Dissertations / Theses on the topic 'Motor wheel'
To see the other types of publications on this topic, follow the link: Motor wheel.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Motor wheel.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Norin, Gustav. "Detecting External Forces on an Autonomous Lawnmowing Robot with Inertial, Wheel Speed and Wheel Motor Current Measurements." Thesis, Linköpings universitet, Reglerteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-137434.
Full textAbstract:
An autonomous lawn mowing robot moves around randomly within an area enclosed by a magnetic wire and makes decision based on sensor information. To ensure human and animal safety it is essential that the robotic lawn mower can detect and stop if, for instance, it is being lifted by a human. This thesis takes a look at how on-board sensors could be used to detect a few critical events, here called fault cases. Data such as acceleration, angular velocity and motor currents are recorded and then used to develop three methods for detection briefly de-scribed below. The Odometry method uses constraints on valid movement of the robotic lawnmower and a fault case is detected if estimated velocity in global coordinates violates these constraints. The pitch angle relationship estimates the relation between electrical currents needed to drive the robotic lawn mower at a certain speed in certain pitch angle. When the electrical currents corresponding to a certain pitch angle according to the relation deviates from measured currents a fault case would be detected. The frequency method is based on the idea that disturbances on signals caused by uneven ground should decrease when the robotic lawn mower is lifted or held. The method would then detect this damping of disturbances by examining frequency content. The best method is the pitch angle relationship while the other two proposed methods have potential but would need higher sampling frequencies and additional signals to fully perform satisfactorily. With additional information such as position of the robotic lawn mower the estimation of the global velocities could be significantly improved which in turn would improve the odometry method and serve as a complement to the current pitch angle relation. The frequency methods would also be valid if the sampling frequencies were much higher, some-thing that might not be as cost efficient as needed to make the method profitable.
2
FREITAS, DANIEL ZACARIAS. "EFFICIENCY ANALYSIS AND CONTROL OF AN INTEGRATED IN-WHEEL ELECTRIC MOTOR." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=26373@1.
Full textAbstract:
PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
Esta dissertação apresenta o estudo para o desenvolvimento de um powertrain elétrico com motorização independente na massa não suspensa do veículo, acoplado diretamente nas rodas In Wheel ou Hub-Motor . O desenvolvimento do sistema proposto visa à maximização da eficiência dos veículos elétricos pela minimização das perdas relacionadas a sistemas mecânicos, como na transmissão convencional utilizada em veículos com motorização única. Outro fator motivador para o desenvolvimento do powertrain com motorização independente é a aplicação de controles independentes para cada roda, possibilitando desenvolver e aplicar uma gama de controles no veículo, os quais com a motorização única não são possíveis ou possuem desempenho não satisfatório. O trabalho apresenta uma visão geral sobre os veículos elétricos, o estudo do comportamento dinâmico vertical com o aumento da massa não suspensa do veículo, desenvolvimento de um controle de velocidade para o powertrain proposto, desenvolvimento de um controle de frenagem ABS elétrico, simulação do sistema em ciclos de direção com o cálculo da eficiência energética do powertrain, e um experimento em um dinamômetro de bancada para validação da eficiência energética dos ciclos simulados.
This paper presents a study for the development of an electric powertrain with independent engines in the vehicle mass not suspended, directly coupled to the wheels In Wheel or Hub-Motor . The development of the proposed system aims at maximizing the efficiency of electric vehicles by minimizing losses related to mechanical systems, as in conventional transmission used in vehicles with single engine. Another motivating factor for the development of powertrain with independent engines is the application of independent controls for each wheel, allowing for the development and application of a range of controls in the vehicle, which would not be possible or would have unsatisfactory performance if a single engine was used. This work presents an overview of electric vehicles, the study of the dynamic vertical behavior with increasing mass of the suspended vehicle, development of a speed control for the proposed powertrain, development of an electric ABS braking control, system simulation toward cycles to calculate the energy efficiency of the powertrain, and an experiment on a bench dynamometer to validate the energy efficiency of simulated cycles.
3
van, den Berg Martinus Anthoon. "Aerodynamic interaction of an inverted wing with a rotating wheel." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/49927/.
Full textAbstract:
This research contributes to the knowledge on aerodynamic wing - wheel interaction. Hereto an experimental and computational study has been performed, during which the wing ride height and the wing - wheel overlap and gap have been considered as the primary variables. The wheel drag for the combined configuration is generally lower at low ride heights and higher at high ride heights compared to the case without wing. This results primarily from changes in the flow separation over the top of the wheel - partly induced by the wing circulation - from the channel flow along the inside of the wheel and from the vortex interaction in the wheel wake. The wing downforce increases at low ride heights due to the wheel presence, but reduces at high ride heights. The modified channeling effect, vortex and separation effects govern the wing flow field, although the wheel circulation acts as an additional mechanism for downforce enhancement and limitation. The wing - wheel interaction has been studied extensively for a baseline configuration, using forces, on-surfaces pressures for the wing and wheel, oil flow and PIV data. A reduced set of data has been obtained for alternative overlap and gap settings. An increase in overlap generally leads to a reduction in wheel drag and wing downforce. A larger gap setting has relatively little influence on the wheel drag at low ride heights, but shifts the higher ride height part of the curve to lower values. The wing downforce is generally slightly lower when the gap increases. An analogy between the wing - wheel configuration and a multi-element airfoil has been used to partly explain the aerodynamic interaction between the components, based on the cross flow along the flap trailing edge. The application of a steady RANS computational approach with Spalart Allmaras turbulence model has been assessed for a baseline configuration over a range of ride heights. Qualitatively, the flow field is predicted fairly accurately, but the flow quantities correlate less satisfactory with the experiments. The downstream interaction in underpredicted, resulting in lower values for the wheel drag, in particular at high ride heights. The use of non-conformal zones around the wing is one of the causes for this discrepancy.
4
Zhang, Guoguang. "Fault Estimation and Fault-tolerant Control for In-wheel Motor Electric Vehicles." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1500421425793541.
Full text
5
Ifedi, Chukwuma Junior. "A high torque density, direct drive in-wheel motor for electric vehicles." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2352.
Full textAbstract:
The use of in-wheel motors, often referred to as hub motors as a source of propulsion for pure electric or hybrid electric vehicles has recently received a lot of attention. Since the motor is housed in the limited space within the wheel rim it must have a high torque density and efficiency, whilst being able to survive the rigours of being in-wheel in terms of environmental cycling, ingress, shock, vibration and driver abuse. Part of the work of this PhD involved an investigation into different slot and pole combinations in order determine a superior machine design, within given constraints based upon an existing in-wheel motor drive built by Protean Electric. Finite element analysis and optimisation have been applied in order to investigate the machine designs and achieve the optimum combination. The main work of this PhD, presents a high torque dense machine employing a new method of construction, which improves the torque capability with a smaller diameter, compared to that of the existing Protean in-wheel drive system. The machine is designed with an open slot stator and using magnetic slot wedges to close the slots. Having an open slot stator design means the coils can be pre-pressed before being inserted onto the stator teeth, this improves the electrical loading of the machine as the fill factor in the slot is increased. The electromagnetic impact of the slot wedges on the machine design has been studied, also a method of coil pressing has been studied and the impact upon coil insulation integrity verified. To ensure adequate levels of functional safety are met it is essential that failures do not lead to loss of control of the vehicle. Studies on a fault tolerant concept which can be applied to the design of in-wheel motors are presented. The study focuses on the ability to sustain an adequate level of performance following a failure, while achieving a high torque density. A series of failures have been simulated and compared with experimental tests conducted on a Protean motor. Finally a prototype is constructed and tested to determine the true level of performance. The prototype is compared to a new motor built in-house by Protean and achieves an improved level of performance.
6
Zhang, Zhe. "Development and validation of microvibration models for a satellite reaction wheel assembly." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/348811/.
Full textAbstract:
Microvibrations are a critical concern on satellites equipped with instruments with high stability requirements. Amongst many sources of microvibration onboard, reaction wheel and momentum wheel assemblies are often considered the most significant. This thesis presents the development and validation of microvibration models for a cantilever configured wheel assembly designed with a soft-suspension system. Wheel assembly induced microvibrations under hard-mounted and coupled boundary conditions are studied. In particular, the wheel assembly semi-analytical microvibration model in a hard-mounted boundary condition is developed with harmonic excitations and the traditionally ignored broadband noise excitations are included. Some peculiar dynamics such as nonlinearity in the motor and high damping of the soft-suspension system are observed from the hard-mounted measurements conducted on a bespoke dynamometer. Modeling strategies for these peculiar dynamics are developed and implemented in the wheel assembly microvibration modeling. This includes a systematic approach to extract stiffness and damping values of the suspension system, considering nonlinearity and high damping from measurements. The microvibrations produced by the wheel assembly in a coupled boundary condition are studied using a seismic mass to support the wheel assembly. A coupled microvibration measurement system, which allows the wheel assembly interface loads to be reconstructed by measuring the response accelerations on the seismic mass, is designed, built and validated. In addition, the wheel assembly driving point static and dynamic accelerance are measured and analytical expressions of the driving point dynamic accelerance are derived. The coupled microvibrations are predicted with wheel assembly static accelerance, dynamic accelerance and the standard method (i.e. no wheel accelerance). The predicted results have shown that the method developed in this thesis which uses the wheel assembly dynamic accelerance accurately simulates the microvibrations observed in practice.
7
Heyder-Bruckner, Jacques. "The aerodynamics of an inverted wing and a rotating wheel in ground effect." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/207263/.
Full textAbstract:
This study investigates the aerodynamics of nil inverted wing in ground effect, a race car wheel and the interaction between the two components, using numerical and experimental methods. The wheels were located behind the wing at flU overlap and gap of 20mm, and the wing ride height. iu the vertical direction was the primary variable. Models of 50% scale were used , giving a Reynolds number of 5.8 x 105 based on the wing chord . The Detached-Eddy Simulation model was validated against wind tunnel measurements including PIV, surface pressures and forces , where it was found to outperform a Reynolds averaged Navier-Stokes approach which used the Spalart-Allmaras turbulence model. It accurately predicted the wing vortex breakdown at low ride heights, which is of the bubble type with a spiralling tail, and the wake of the wheel. A mesh sensitivity study revealed that a finer mesh increased the amount of structures captured with the DES model, improving its accuracy.
8
Terakawa, Tatsuro. "Omnidirectional Mobile Mechanisms and Integrated Motor Mechanisms for Wheeled Locomotion Devices." Kyoto University, 2019. http://hdl.handle.net/2433/242493.
Full textAbstract:
付記する学位プログラム名: デザイン学大学院連携プログラムKyoto University (京都大学)
0048
新制・課程博士
博士(工学)
甲第21755号
工博第4572号
新制||工||1713(附属図書館)
京都大学大学院工学研究科機械理工学専攻
(主査)教授 小森 雅晴, 教授 松野 文俊, 教授 松原 厚
学位規則第4条第1項該当
9
Yilmaz, Kurtulus. "Comparison Of Axial Flux And Radial Flux Brushless Dc Motor Topologies For Control Moment Gyroscope Wheel Applications." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610565/index.pdf.
Full textAbstract:
In this thesis axial flux and radial flux brushless dc motors will be studied as a drive motor for the control of moment gyroscope wheel. Design equations for axial flux and radial flux brushless dc motor topologies will be reviewed. Based on these equations radial and axial flux motors with different number of poles will be designed that meet control moment gyroscope wheel application requirements. The results will be evaluated in terms of efficiency, torque/mass and torque/volume, and suitability for the control moment gyroscope application.
10
Romero, Sergio. "Analysis of a light permanent magnet in-wheel motor for an electric vehicle with autonomous corner modules." Thesis, KTH, Elektrisk energiomvandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-53692.
Full textAbstract:
The use of in-wheel motors is an attractive alternative in small passenger vehicles aimed for transportation in urban areas. The improved control possibilities and the removal of certain components such as the transmission systemare some of its advantages. Therefore, this thesis deals with the analysis of an permanent magnet synchronous outer rotor motor aimed for an in-wheel application with the autonomous corner module concept. First, some basic concepts about permanent magnet motors are reviewed and an analytical model of a permanent magnet outer rotor motor is presented. As a result from this analytical model, three motor configurations are obtained including both distributed and concentrated windings. Next, finite element method simulations are conducted on the previously obtained motor configurations. Torque-speed curves, voltage-speed curves and losses are computed. Differences with the results obtained using the analytical model are observed due to its simplicity. Both sinusoidal and pulse width modulation currents are used as an input to the motors obtaining considerably different results, especially in terms of losses. Stator skew is introduced for torque ripple reduction and an analytical magnet segmentation model is applied to reduce the magnet losses. Finally, a thermal analysis is carried out to confirm the thermal viability of the motors under two different driving cycles. The material properties are contrasted with the obtained temperatures to a discard possible magnet demagnetization or insulation failure. It is concluded that the current density in the motors can be increased.
11
Gougani, Milad. "Hall sensor-based locking electric differential system for BLDC motor driven electric vehicle with independent wheel drives." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42168.
Full textAbstract:
It is generally known that stability of vehicles under certain driving conditions may be improved by forcing the wheels to turn at the same speed and angle regardless of the available traction under individual wheels. For conventional all-terrain vehicles or sport-utility vehicles, this function can be achieved by locking the mechanical differential system. In this thesis, we propose an innovative approach for locking the electrical differential system (EDS) of electric vehicles (EV) with independent brushless DC (BLDC) machine-based wheel drives. The proposed method locks the active wheels of the vehicle as if they were operating on a common “virtual” shaft. The locking algorithm is implemented by processing the Hall sensor signals of the considered motors and driving them with a single set of “averaged” Hall signals, thereby operating the motors at the same speed and angle. A detailed switch-level model of EDS embedded with the proposed Sync-Lock Control (SLC) along with the BLDC propulsion motors has been developed and compared against measurements for the considered BLDC propulsion motors. The proposed technique is shown to achieve better results compared to a conventional speed control loop as the considered motors are locked directly through the corresponding magnetic fields.
An efficient realization of the proposed controller is presented that makes it possible to be potentially programmed inside existing motor controllers or implemented in a stand-alone microcontroller which can be packaged into a dongle circuit. The proposed SLC is implemented digitally using a programmable integrated circuit microcontroller. First, the Hall signals undergo a layer of filtering to mitigate the errors that are common due to Hall sensor misalignment in low-cost BLDC motors. Then, the locking algorithm is implemented by averaging the filtered Hall sensor signals. The SLC prototype is implemented in form of a standalone dongle-circuit that can be easily placed between the original Hall-sensors and the BLDC motor driver. Operation of typical industrial BLDC motors with the proposed controller is shown to outperform conventional controllers and lock both speed and angle of the motors.
12
Perekopskiy, Sergey [Verfasser], and Roland [Gutachter] Kasper. "On the analysis and design of in-wheel motor for vehicle application / Sergey Perekopskiy ; Gutachter: Roland Kasper." Magdeburg : Universitätsbibliothek Otto-von-Guericke-Universität, 2020. http://d-nb.info/1220035076/34.
Full text
13
Bernacki, Mark. "Design and development of an extended range electric bywire/wireless hybrid vehicle with a near wheel motor drivetrain." Thesis, UOIT, 2009. http://hdl.handle.net/10155/42.
Full textAbstract:
With automobile propulsion energy sources turning away from petroleum, the evolution
of technology naturally lends itself to electrical hybrid vehicle architectures relying on
alternatives as a primary electrical energy source. This thesis presents a design solution of
a direct-drive and drive-by-wire prototype of a hybrid extended range electric vehicle
(EREV) based on a dune buggy test bed. The developed setup eliminates nearly all
mechanical inefficiencies in the rear wheel drive transaxle drivetrain. All controls have
been purposely designed as a duplicate set to allow for full independent control of both
rear wheels in a truly independent architecture. Along with the controls supporting the
design, the motors have been mounted in a near wheel fashion to adequately replace a
true hub motor setup. In addition, by-wire throttle and by-wireless brakes in a servomechanical
fashion have been developed. The by-wireless braking system is used to
control regenerative braking for the rear of the vehicle only allowing for the front brakes
to be the primary means of braking as well as a mechanical safety redundancy. This
design allows for developments in the areas of truly independent electronic differential
systems and studies of the effect of near wheel motor setup. The efficiencies gained by
the design solutions implemented in this thesis project have shown their ability to be used
in a functioning motor vehicle. Direct gains in mechanical efficiency as well as the
removal of a non eco-friendly gasoline powertrain have been attained. In addition, an
electric architecture has been developed for further research in future studies such as
vehicle stability control, traction control and all-wheel-drive architectures.
14
Hayakawa, Yoshikazu, and Akira Ito. "Design of Fault Tolerant Control System for Electric Vehicles with Steer-By-Wire and In-Wheel Motors." International Federation of Automatic Control (IFAC), 2013. http://hdl.handle.net/2237/20771.
Full text
15
Faithfull, Paul. "A hardware-in-the-loop approach to independent wheel control development using a physical scale model as a low cost prototyping tool : executive summary." Thesis, University of Warwick, 1999. http://wrap.warwick.ac.uk/73389/.
Full textAbstract:
Environmental legislation is driving research into new technologies for future automotive products. Electric vehicle technologies have the potential to meet these legislative requirements, but are currently restricted by cost implications. This work focuses on the potential for offsetting this cost against potential benefits of the technology. In particular, the application of a motor at each wheel, facilitating Independent Wheel Control (IWC). A scale model vehicle is incorporated into a Hardware-in-the-Loop (HIL) simulation for the application of developing IWC strategies. The model uses four motors, each driving a single wheel in order to effect this control. Control strategies are 'rapid prototyped' in MathWorks Simulink™ using an industrial standard tool, dSPACE™, to operate the strategies in real-time HIL simulation. The application of a control strategy, representative of a conventional 4x4 behaviour, incorporating a lockable centre differential is applied. Shaft compliance is modelled in order to provide a test of the system operation with a transient dynamic response. Stability issues raised through this application are related to signal processing. An estimator is devised in software to overcome these issues, producing a stable system response. The work concludes that the use of a physical scale model for the development of IWC strategies is inappropriate in the context of supporting the development of a full-scale vehicle due to the complexity of reproducing a scaled tyre. However, in a broader sense, the approach of utilising a physical model has demonstrated significant benefits in promoting the concept of lWC within an industrial organisation, and in assisting product development.
16
Wiet, Christopher J. "Energy Optimization of an In-Wheel-Motor Electric Ground Vehicle over a Given Terrain with Considerations of Various Traffic Elements." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397045426.
Full text
17
Drahý, Jan. "Modální analýza turbínového kola pro letecký motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229038.
Full textAbstract:
The master thesis deals with modal analysis of turbine wheel of aircraft engine. The first part is concerned with the modal analysis of the computational model of turbine wheel and separated turbine blade using the cyclic symmetry of the ANSYS software. This part of the thesis set the task of determining the natural frequency depending on the operating parameters of the motor. The second part of the thesis occupies with the experimental simulation of the task. The results of experimental simulation are verified and compared with the results from the computational modal analysis. The goal is to create a Campbell diagram and to determine the intervals of the critical revolution of the turbine wheel.
18
Wanner, Daniel, Trigell Annika Stensson, Lars Drugge, and Jenny Jerrelind. "Survey on fault-tolerant vehicle design." KTH, Farkost och flyg, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-98811.
Full textAbstract:
Fault-tolerant vehicle design is an emerging inter-disciplinary research domain, which is of increasedimportance due to the electrification of automotive systems. The goal of fault-tolerant systems is to handleoccuring faults under operational condition and enable the driver to get to a safe stop. This paperpresents results from an extended survey on fault-tolerant vehicle design. It aims to provide a holisticview on the fault-tolerant aspects of a vehicular system. An overview of fault-tolerant systems in generaland their design premises is given as well as the specific aspects related to automotive applications. Thepaper highlights recent and prospective development of vehicle motion control with integrated chassiscontrol and passive and active fault-tolerant control. Also, fault detection and diagnosis methods arebriefly described. The shift on control level of vehicles will be accompanied by basic structural changeswithin the network architecture. Control architecture as well as communication protocols and topologiesare adapted to comply with the electrified automotive systems. Finally, the role of regulations andinternational standardization to enable fault-tolerant vehicle design is taken into consideration.Qc 20120730
19
Rolle, Bernhard [Verfasser]. "Model Predictive Energy Management for Induction Motor Drives and All-Wheel-Drive Battery Electric Vehicles : A Flatness Based Approach / Bernhard Rolle." Düren : Shaker, 2021. http://d-nb.info/1233547828/34.
Full text
20
Camacho, Silva Leandro. "Modeling and Design of the Electric Drivetrain for the 2013 Research Concept Vehicle." Thesis, KTH, Elektrisk energiomvandling, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133353.
Full textAbstract:
The research for electric vehicles has been growing during last years and the development of electric drive trains can be considered a main challenge. This thesis presents the electric drive train of the research concept vehicle (RCV) 2013, with particular focus on electric machines, motor controllers, and the communication system. In the first part of this thesis, the electric drive train configuration and components are described. In-wheel motors are proposed which is a permanent magnet synchronous machine (PMSM). This technology allows the use of autonomous corner modules (ACM) increasing the quality and safety of the system. Each of the four in-wheel motors has a controller enabling the use of torque or speed control mode. Furthermore, a dSPACE unit provides the total control of the system by CAN bus. Additionally, the dSPACE ControlDesk interface used to control the drive system is presented. In the second part, the heat sink of the AC Drive is investigated by measurements and analytical calculations. Furthermore, the motor temperature at different loads is also presented and discussed. Finally, the efficiency of an in-wheel motor (PRA 230) is studied. Also the efficiency of the motor controller is estimated and discussed.
21
Rolle, Bernhard [Verfasser], and Oliver [Akademischer Betreuer] Sawodny. "Model predictive energy management for induction motor drives and all-wheel-drive battery electric vehicles : a flatness based approach / Bernhard Rolle ; Betreuer: Oliver Sawodny." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2021. http://d-nb.info/123272792X/34.
Full text
22
Chen, Yan. "Energy-Efficient Control Allocation for Over-Actuated Systems with Applications to Electric Ground Vehicles." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366305314.
Full text
23
Martínez, Daniel. "Design of a Permanent-Magnet Synchronous Machine with Non-Overlapping Concentrated Windings for the Shell Eco Marathon Urban Prototype." Thesis, KTH, Elektrisk energiomvandling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109741.
Full textAbstract:
This thesis deals with the design of a permanent-magnet synchronous inner rotor motor for an in-wheel application for the Shell Eco Marathon Urban concept vehicle. First of all, concepts related to permanent magnet motors are studied. Likewise, different features of permanent magnet motors are qualitatively evaluated in order to choose the most suitable. A radial flux motor is selected based on its solid, economic and acceptable characteristics. Next, a detailed study of concentrated windings is carried out. Through this investigation, undesirable configurations of pole and slot numbers due to unbalanced magnetic pull or a low fundamental winding factor will be avoided and how to determine the different winding layouts for different pole and slots configuration will be explained. As well, based on this study, and the magnetic and electric behavior of the machine, an analytical model is created. This model calculates the optimum size and characteristics of a machine in order to obtain lightweight design. After that, the design of a program based on a finite element method that simulates different situations for the machine is accomplished, dealing with the difficulties that entails the concentrated windings. Finally, through the use of this program, the machine calculated by the analytical model is analyzed, specially regarding that it does not surpass some important margin in order not to be demagnetized or not to surpass the maximum phase voltage supplied by the batteries.
24
B, M. Shiva Kumar, and kathiravan Ramanujam. "Thermal Simulation of Hybrid Drive System." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-71695.
Full textAbstract:
Safety, performance and driving comforts are given high importance while developing modern day cars. All-Wheel Drive vehicles are exactly designed to fulfill such requirements. In modern times, human concern towards depleting fossil fuels and cognizance of ecological issues have led to new innovations in the field of Automotive engineering. One such outcome of the above process is the birth of electrical hybrid vehicles. The product under investigation is a combination of all wheel drive and hybrid system. A superior fuel economy can be achieved using hybrid system and optimized vehicle dynamic forces are accomplished by torque vectoring action which in turn provides All-Wheel Drive capabilities. Heat generation is inevitable whenever there is a conversion of energy from one form into another. In this master thesis investigation, a thermal simulation model for the product is built using 1D simulation tool AMESim and validation is done against the vehicle driving test data. AMESim tool was chosen for its proven track record related to vehicle thermal management. The vehicle CAN data are handled in MATLAB. In a nutshell, Simulation model accounts for heat generation sources, oil flow paths, power loss modeling and heat transfer phenomena. The final simulation model should be able to predict the transient temperature evolution in the rear drive when the speed and torque of motor is supplied as input. This simulation model can efficiently predict temperature patterns at various locations such as casing, motor inner parts as well as coolant at different places. Various driving cases were tried as input including harsh (high torque, low speed) ones. Simulation models like this helps Engineers in trying out new cooling strategies. Flow path optimization, flow rate, convection area, coolant pump controlling etc are the few variables worth mentioning in this regard.
25
Wanner, Daniel. "Controlling over-actuated road vehicles during failure conditions." Doctoral thesis, KTH, Fordonsdynamik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166819.
Full textAbstract:
The aim of electrification of chassis and driveline systems in road vehicles is to reduce the global emissions and their impact on the environment. The electrification of such systems in vehicles is enabling a whole new set of functionalities improving safety, handling and comfort for the user. This trend is leading to an increased number of elements in road vehicles such as additional sensors, actuators and software codes. As a result, the complexity of vehicle components and subsystems is rising and has to be handled during operation. Hence, the probability of potential faults that can lead to component or subsystem failures deteriorating the dynamic behaviour of road vehicles is becoming higher. Mechanical, electric, electronic or software faults can cause these failures independently or by mutually influencing each other, thereby leading to potentially critical traffic situations or even accidents. There is a need to analyse faults regarding their influence on the dynamic behaviour of road vehicles and to investigate their effect on the driver-vehicle interaction and to find new control strategies for fault handling. A structured method for the classification of faults regarding their influence on the longitudinal, lateral and yaw motion of a road vehicle is proposed. To evaluate this method, a broad failure mode and effect analysis was performed to identify and model relevant faults that have an effect on the vehicle dynamic behaviour. This fault classification method identifies the level of controllability, i.e. how easy or difficult it is for the driver and the vehicle control system to correct the disturbance on the vehicle behaviour caused by the fault. Fault-tolerant control strategies are suggested which can handle faults with a critical controllability level in order to maintain the directional stability of the vehicle. Based on the principle of control allocation, three fault-tolerant control strategies are proposed and have been evaluated in an electric vehicle with typical faults. It is shown that the control allocation strategies give a less critical trajectory deviation compared to an uncontrolled vehicle and a regular electronic stability control algorithm. An experimental validation confirmed the potential of this type of fault handling using one of the proposed control allocation strategies. Driver-vehicle interaction has been experimentally analysed during various failure conditions with typical faults of an electric driveline both at urban and motorway speeds. The driver reactions to the failure conditions were analysed and the extent to which the drivers could handle a fault were investigated. The drivers as such proved to be capable controllers by compensating for the occurring failures in time when they were prepared for the eventuality of a failure. Based on the experimental data, a failure-sensitive driver model has been developed and evaluated for different failure conditions. The suggested fault classification method was further verified with the conducted experimental studies. The interaction between drivers and a fault-tolerant control system with the occurrence of a fault that affects the vehicle dynamic stability was investigated further. The control allocation strategy has a positive influence on maintaining the intended path and the vehicle stability, and supports the driver by reducing the necessary corrective steering effort. This fault-tolerant control strategy has shown promising results and its potential for improving traffic safety.QC 20150520
26
Baserrah, Salwa [Verfasser], Bernd [Akademischer Betreuer] Orlik, and Bernd [Akademischer Betreuer] Kuhfuß. "Theoretical and Experimental Investigations of a Permanent Magnet Excited Transverse Flux Machine with a Segmented Stator for In-Wheel Motor Applications / Salwa Baserrah. Gutachter: Bernd Orlik ; Bernd Kuhfuß. Betreuer: Bernd Orlik." Bremen : Staats- und Universitätsbibliothek Bremen, 2014. http://d-nb.info/1072226251/34.
Full text
27
Stoklásek, Tomáš. "Návrh konstrukčního řešení automatického podavače tablarů pro skladovací systém SLL LogiMat." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241722.
Full textAbstract:
The aim of this thesis is automatic movable shelves feeder design. the feeder is part of vertical lift storage system Logimat Total weight of movable shelf is 760 kg. The technical report contains feeder design calculation, feeder’s main parts strength calculation and the design of the way of picking the movable shelf from the storage lift. The report also contains feeder’s frame strength analysis using finite element method and sensor design for motion control.
28
Linder, Johan. "An integrated brake disc and electric drive for vehicle propulsion : A FEASIBILITY STUDY." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187652.
Full textAbstract:
In this thesis, the feasibility to integrate an brake disc and electric machine is investigated. In wheel motors (IWMs) have several advantages, such as saving space in the vehicle, individual and direct control at the wheels and the absence of a mechanical transmission. However, today’s IWMs are heavy and, thus, negatively affect the driving performance of the vehicle due to the increase of the unsprung mass. By integrating an already existing part in the wheel, this increase of the unsprung mass can be minimized. The brake disc manages high temperatures, a significant wear in rough environ-ment, which puts high demands on the rotor. The second part of the machine, the stator, will be significantly affected by the high temperatures of the rotor. The temperatures of the stator are transferred by convection, conduction and radiation from the rotor or brake disc. Liquid cooling of the stator back is analyzed as a potential solution for handling the high temperatures. In order to analyze the feasibility of the concept, thermal, electric and mechanical modelling has been used. The evaluation whether it is possible or not to integrate the brake disc has been with regard to the results of weight, cost, thermal tolerance and electric performance.I detta arbete undersöks möjligheten att integrera en bromsskiva med elmaskin. Hjul-motorer har flera fördelar, bland annat sparas utrymme i själva bilen, individuell kontroll samt drivning av hjulen utan mekaniska transmissioner. Men hjulmotorer som kan användas idag väger oftast så pass mycket att den odämpade massan ökar kritiskt och köregenskaper av fordonet då blir lidande. Genom att integrera en befintlig del i hjulet kan ¨okningen av odämpade massan minskas. Att använda bromsskivan som rotor, kräver att denna tål temperaturer ¨over 500◦C samt påfrestningar och slitage som en vanlig mekanisk friktionsbroms måste uthärda. Den andra delen av maskinen, statorn kommer även denna att påverkas av de höga temperaturerna av bromsskivan som kommer ledas via konvektion, konduktion och strålning. Möjligheten att kyla statorn med vätska och om detta är tillräckligt undersöks. För att analyserna genomförbarheten av projektet har termiska, elektriska och mekaniska modeller använts. Resultaten har analyserats där maskinens vikt, kostnad, termisk tålighet och elektrisk prestanda har legat till grund för bedömningen om lösningen; att integrera en broms-skiva med elmaskin är rimlig eller ej.
29
Yang, Sichao. "In-wheel motors for electric vehicles." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/4054.
Full textAbstract:
The in-wheel motor technology as the source of traction for electric vehicles has been researched recently because it is compact and ease-to-integrate. The motor is housed in the wheel. Since the room for the motor is tightly defined by the size of the wheel and there is no gearing system, the motor must have a high torque density to drive the vehicle directly and a high efficiency to keep cool. The existing motor uses a surface-mounted magnet topology. To make it more cost-competitive, the magnet material needs to be reduced while maintaining the torque performance at the rated operating condition. It is the motive of this Ph.D. research. The thesis starts with a brief introduction on the background of the electric vehicle. Then the major challenges of the in-wheel motor technology are summarised. With the derived specifications, an induction machine and a switched reluctance machine are then simulated and analysed. Still, the permanent magnet synchronous machine is proved to have the highest torque density. Change from surface-mounted to interior topology, six new magnet topologies are investigated. The V-shaped interior magnet topology shows superior torque-to-magnet-mass ratio and is easy-to-manufacture. It gives 96% torque while using 56% of the magnet mass compared to the existing motor due to the assist from the additional reluctance torque and the lower magnetic circuit reluctance. The key to use less magnet mass while avoiding the demagnetisation is the front iron shielding effect. The analytical explanation on the better resistance to demagnetisation in the V-shaped motor is provided. The magnet loss mechanism is discussed for proper segmentation. Detailed design adjustments are made to compromise between the torque-to-magnet-mass ratio and the manufactural practicality. Issues regarding to lower mechanical rigidity occurred in initial assembly of the prototype and solutions are proposed. Followed by successful assembly, experimental tests were conducted and results show good agreement with the simulation. A specific form of torque ripple is found in the V-shaped motor and occurs generally in all fractional-slot concentrated-winding machines with saliency. It is explained by an analytical model. This model is also extended to explain the generally lower reluctance torque in vi fractional-slot concentrated-winding machines. Potential design improvements are suggested and simulated for future versions.
30
Бєлих, Віталій Ростиславович. "Конструкторсько-технологічне забезпечення електричної платформи "odi" для людей з інвалідністю (комплексна магістерська дисертація)." Master's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/31365.
Full textAbstract:
На основі аналізу стану питання у сфері транспортування людей з обмеженими можливостями, визначено, що в розвинутих країнах, існують розробки, що дозволяють покращити умови транспортування, у тому числі оснащених електричними приводами руху. Такі технології вже доступні у більшості країн широкому загалу людей з середніми та високим рівнем достатку. Впроцесі роботи було створено дизайн транспортного засобу, проаналізовано та спроектовано систему задньої підвіски електричної платформи. Для перевірки отриманих результатів, було проведено комп’ютерну симуляцію підвіски. Виготовлений у масштабі 1:4 макет ферми задньої підвіски, та макет дизайну електричної платформи.Based on the analysis of the state of the issue in the field of transportation of people with disabilities, it is determined that in developed countries there are developments that can improve transportation conditions, including those equipped with electric movement drives. Such technologies are already available in most countries to a wide range of people with medium and high incomes.In the process, a vehicle design was created, the rear suspension system of the electric platform was analyzed and designed. To verify the results, a computer simulation of the suspension was carried out.Made in a 1: 4 scale layout of the rear suspension truss, and the layout design of the electric platform.
31
Morini, Matteo. "Solar Wheel." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Find full textAbstract:
L'elaborato tratta una particolare ruota solare prodotta da Marand, usata per le competizioni automobilistiche solari.
Dopo un'introduzione, che spiega chi è Marand, in cosa consiste la ruota a grandi linee e gli aspetti generali di cui tenere conto, segue una descrizione dei componenti principali che formano la ruota ed infine la procedura per smontarla/montarla.
32
de, Fluiter Travis. "Design of lightweigh electric vehicles." The University of Waikato, 2008. http://hdl.handle.net/10289/2438.
Full textAbstract:
The design and manufacture of lightweight electric vehicles is becoming increasingly important with the rising cost of petrol, and the effects emissions from petrol powered vehicles are having on our environment. The University of Waikato and HybridAuto's Ultracommuter electric vehicle was designed, manufactured, and tested. The vehicle has been driven over 1800km with only a small reliability issue, indicating that the Ultracommuter was well designed and could potentially be manufactured as a solution to ongoing transportation issues. The use of titanium aluminide components in the automotive industry was researched. While it only has half the density of alloy steel, titanium aluminides have the same strength and stiffness as steel, along with good corrosion resistance, making them suitable as a lightweight replacement for steel components. Automotive applications identified that could benefit from the use of TiAl include brake callipers, brake rotors and electric motor components.
33
Le, Marquer Nicolas. "Vers la synthèse d'une roue à rochet moléculaire." Thesis, Le Mans, 2015. http://www.theses.fr/2015LEMA1025/document.
Full textAbstract:
Dans le domaine des machines moléculaires, la recherche d'un système produisant un mouvement orienté fait l'objet d'intenses recherches. Des résultats ont déjà été obtenus en ce sens mais n'exploitant pas le mouvement brownien comme le font les systèmes trouvés dans la nature comme la myosine. Nous proposons donc la synthèse d'une roue à rochet avec pour but de mimer ce phénomène, si besoin avec une activation de faible énergie. La première partie de ce travail a consisté en la conception par modélisation de l'équivalent synthétique d'une roue à rochet, basiquement constituée d'une roue crantée et d'un cliquet en vue d'étudier si une telle molécule pourrait produire une rotation orientée. Ce système est constitué d'un motif bishomoinositol fonctionnalisé en tant que roue et d'un cycloadduit de l'anthracène comme cliquet, liés par des bras espaceurs. La synthèse d'un système modèle dans lequel un motif bicyclo[2.2.2]octane joue le rôle de roue simplifiée a été menée afin de valider les différentes stratégies de synthèse. A cette occasion, une méthode alternative de la synthèse du diacide bicyclo[2.2.2]octanoïque a été mise au point ainsi qu'une méthodologie d'estérification compatible avec cet acide ainsi que le diacide 9,10-anthracènedioïque. Nous sommes ainsi parvenus à obtenir le produit de macrolactonisation, avec de possibles application comme roue de nanovéhicules. La synthèse du modèle a été l'occasion de pointer certaines impossibilités synthétiques au niveau des espaceurs (éthers, amides, triazoles, tétrazoles, alcènes) dans le système original. Un nouveau travail de modélisation a permis d'aboutir à une cible accessible synthétiquement conservant le comportement de roue à rochet. Dans cette optique, la synthèse du bishomoinositol fonctionnalisé par des acides en tête de pont a été entreprise par une première voie incluant ces groupements au départ de la synthèse, une seconde voie introduisant ces groupements en fin de séquenceIn the field of molecular machines, systems producing an oriented motion have been intensely looked for. Results, obtained toward this goal, do not exploit Brownian motion whereas it happens in natural systems such as myosin. Hereby we propose the synthesis of a molecular ratchet aiming to mimic this phenomenon or to be able to act as a molecular motor through low energy activation. The first part of this work consisted in the design by modelisation of a synthetic equivalent of a ratchet, basically consisting of a toothed wheel and a pawl. This study aim at determining if such a molecule could produce an oriented motion by simple Brownian motion. This system is consisting of a functionalized bishomoinositol moiety as the wheel and a cycloadduct of anthracene as the pawl, linked by spacers allowing the adjustment of the energy barriers. The synthesis of a model where a bicyclo[2.2.2]octane moiety plays the role of a simplified wheel has been conducted in order to validate various synthetic strategies. This gave the opportunity to develop an alternative method of the synthesis of the bicyclo[2.2.2]octanedicarboxylic diacid as well as an esterification methodology compatible with the bulkiness or low solubility of both partners. The macrolactonization product could be obtained and opens some possible applications as nanovehicle wheels. The synthesis of the model was the occasion to highlight synthetic limitations concerning the spacers (ethers) in the original system. A new series of targets taking into account the synthetic restrictions while keeping the ratchet behavior were designed. The discovery of another synthetic difficulties (amides, triazoles, tetrazoles and alkenes) yielded a single refined target. Toward this goal, the synthesis of the bishomoinositol functionalized in the bridgehead position was engaged in a first pathway including these functions at the beginning of the synthesis, the second way introducing them on the bishomoinositol at the end of the sequence
34
Fritz, Martin [Verfasser], and A. [Akademischer Betreuer] Albers. "Methodische Entwicklung modellbasierter Überwachungsfunktionen für mechatronische Systeme im Kraftfahrzeug am Beispiel eines elektromechanischen Radbremsaktors = Methodological Development of Model-Based Supervision Functions for Mechatronic Systems in Motor Vehicles Using the Example of an Electromechanical Wheel Brake Actuator / Martin Fritz ; Betreuer: A. Albers." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/1235072649/34.
Full text
35
Ušiak, Michal. "Porovnání koncepcí hybridního pohonu v režimu denního dojíždění do práce." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417429.
Full textAbstract:
The master’s thesis deals with modelling of various architectures of hybrid powertrains for three vehicle sizes in GT-SUITE and compares them in daily commuting operating mode. On top of making of the hybrid vehicle simulation models, control algorithms had to be created to manage the energy split between the internal combustion engine and the electric motor for each of the architectures. Routes to work and back were logged using the GPS and postprocessed to obtain the speed and the road grade profiles. Resulting data was used as an input in simulations of daily commuting. To compare all hybrid powertrain architectures, fuel economy and electricity consumption were evaluated for WLTP and daily commuting operating modes. Finally, the environmental impact of each topology was assessed based on an estimation of corresponding well-to-wheel emissions.
36
Liao, Yonghui. "Analysis of fault conditions in permanentmagnet in-wheel motors." Thesis, KTH, Elektrisk energiomvandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-53685.
Full textAbstract:
The use of light in-wheel motors is an attractive alternative for smaller passenger vehicles in urban areas. An in-wheel motor design has already been developed in a previous master thesis project. In this project, the proposed design is further analysed during electrical faults using a FEM software package (JMAG). A failure modes and effects analysis (FMEA) is carried out to identify the important faults. The faults simulated in this project are: phase short circuit, phase open circuit, high impedance, inter-turn short circuit, magnetization faults and inverter faults. Each of these faults is then further divided into the second level detailed faults. Four new JMAG models are developed based on the JMAG model in the previous master thesis. Each fault is simulated by using a suitable JMAG model. The simulation results under fault conditions and those under normal conditions of the corresponding JMAG models are then compared and analysed. A demagnetization check and a simple thermal check during fault conditions are carried out. At last a torque-speed model is discussed for further study based on the obtained torque under fault conditions.
37
Olša, Petr. "Návrh řízení všesměrového mobilního robotu O3-X." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229210.
Full textAbstract:
This thesis deals with the design of a three-wheeled omni-directional robot control. The model of control is designed for robot´s omni-directional platform driven by maxon motor with the intelligent positioning controller EPOS. The design of control contains: - installation of the coordinated systems and transformation from one of them into another - design of system´s kinematical model - creation of classes for control and communication with EPOS - creation of the simulative program - planning of the mobile robot´s path - verification that the system is working The solution was based on continuous accelerated motion and the maximal acceleration of wheels was concerned, so that the slip would be suppressed. The function of the model was partly verified.
38
Hajihosseinlu, Amin. "Traction control of an electric vehicle with four in-wheel motors." IEEE, 2015. http://hdl.handle.net/1993/30601.
Full textAbstract:
This thesis evaluates an electric vehicle with four independently-controlled in-wheel
electric motors. The electric vehicle investigated in this work requires a main con-
troller that not only coordinates with each individual motor drive controller, but is
also needed to distribute torque and power to each in-wheel motor. The controller
adjusts the speed of each motor to the driving conditions according to the require-
ments and emulates the behavior of a mechanical di erential. Then, in addition to
the electronic di erential controller, a simple yet robust control strategy for maximiz-
ing traction force between tire and road is developed and presented. Moreover, the
controller continuously senses the yaw rate and prevents over- and under-steering by
adjusting the torque on the right or left wheels. Simulation and experimental results
validate the proposed strategy.
39
Jayakumar, Gautham. "Modeling And Analysis Of Fault Conditions In Avehicle With Four In-Wheel Motors." Thesis, KTH, Fordonsdynamik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121475.
Full textAbstract:
A vast expansion is found in the field of automotive electronic systems. The expansion iscoupled with a related increase in the demands of power and design. Now, this is goodarena of engineering opportunities and challenges. One of the challenges faced, isdeveloping fault tolerant systems, which increases the overall automotive and passengersafety. The development in the field of automotive electronics has led to the innovationof some very sophisticated technology. However, with increasing sophistication intechnology also rises the requirement to develop fault tolerant solutions.As one of many steps towards developing a fault tolerant system, this thesis presents anexhaustive fault analysis. The modeling and fault analysis is carried out for a vehicle withfour in-wheel motors. The primary goal is to collect as many of the possible failuremodes that could occur in a vehicle. A database of possible failure modes is retrievedfrom the Vehicle Dynamics research group at KTH. Now with further inputs to thisdatabase the individual faults are factored with respect to change in parameters of vehicleperformance. The factored faults are grouped with respect to similar outputcharacterization.The fault groups are modeled and integrated into a vehicle model developed earlier inMatlab/Simulink. All the fault groups are simulated under specific conditions and theresults are obtained. The dynamic behavior of the vehicle under such fault conditions isanalyzed. Further, in particular the behavior of the vehicle with electronic stabilitycontrol (ESC) under the fault conditions is tested. The deviation in the vital vehicleperformance parameters from nominal is computed.Finally based on the results obtained, a ranking system termed Severity Ranking System(SeRS) is presented. The severity ranking is presented based on three essential vehicleperformance parameters, such as longitudinal acceleration ( ), lateral acceleration ( )and yaw rate ( ̇ ). The ranking of the faults are classified as low severity S1, mediumseverity S2, high severity S3 and very high severity S4. A fault tolerant system must beable to successfully detect the fault condition, isolate the fault and provide correctiveaction. Hence, this database would serve as an effective input in developing fault tolerantsystems.
40
Geamanu, Marcel-Stefan. "Estimation and dynamic longitudinal control of an electric vehicle with in-wheel electric motors." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00871231.
Full textAbstract:
The main objective of the present thesis focuses on the integration of the in-wheel electric motors into the conception and control of road vehicles. The present thesis is the subject of the grant 186-654 (2010-2013) between the Laboratory of Signals and Systems (L2S-CNRS) and the French Institute of Petrol and New Energies (IFPEN). The thesis work has originally started from a vehicular electrification project, equipped with in-wheel electric motors at the rear axle, to obtain a full electric urban use and a standard extra-urban use with energy recovery at the rear axle in braking phases. The standard internal combustion engines have the disadvantage that complex estimation techniques are necessary to compute the instantaneous engine torque. At the same time, the actuators that control the braking system have some delays due to the hydraulic and mechanical circuits. These aspects represent the primary motivation for the introduction and study of the integration of the electric motor as unique propelling source for the vehicle. The advantages brought by the use of the electric motor are revealed and new techniques of control are set up to maximize its novelty. Control laws are constructed starting from the key feature of the electric motor, which is the fact that the torque transmitted at the wheel can be measured, depending on the current that passes through the motor. Another important feature of the electric motor is its response time, the independent control, as well as the fact that it can produce negative torques, in generator mode, to help decelerate the vehicle and store energy at the same time. Therefore, the novelty of the present work is that the in-wheel electric motor is considered to be the only control actuator signal in acceleration and deceleration phases, simplifying the architecture of the design of the vehicle and of the control laws. The control laws are focused on simplicity and rapidity in order to generate the torques which are transmitted at the wheels. To compute the adequate torques, estimation strategies are set up to produce reliable maximum friction estimation. Function of this maximum adherence available at the contact between the road and the tires, an adequate torque will be computed in order to achieve a stable wheel behavior in acceleration as well as in deceleration phases. The critical issue that was studied in this work was the non-linearity of the tire-road interaction characteristics and its complexity to estimate when it varies. The estimation strategy will have to detect all changes in the road-surface adherence and the computed control law should maintain the stability of the wheel even when the maximum friction changes. Perturbations and noise are also treated in order to test the robustness of the proposed estimation and control approaches.
41
Refvem, Charles T. "Design, Modeling and Control of a Two-wheel Balancing Robot Driven by BLDC Motors." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2110.
Full textAbstract:
The focus of this document is on the design, modeling, and control of a self-balancing two wheel robot, hereafter referred to as the balance bot, driven by independent brushless DC (BLDC) motors. The balance bot frame is composed of stacked layers allowing a lightweight, modular, and rigid mechanical design. The robot is actuated by a pair of brushless DC motors equipped with Hall effect sensors and encoders allowing determination of the angle and angular velocity of each wheel. Absolute orientation measurement is accomplished using a full 9-axis IMU consisting of a 3-axis gyroscope, a 3-axis accelerometer, and a 3-axis magnetometer.
The control algorithm is designed to minimize deviations from a set point specified by an external radio remote control, which allows the remote operator to steer and drive the bot wirelessly while it remains balanced. Multiple dynamic models are proposed in this analysis, and the selected model is used to develop a linear-quadratic regulator based state-feedback controller to perform reference tracking. Controller tracking performance is improved by incorporating a prefilter stage between the setpoint command from the remote control and the state-feedback controller.
Modeling of the actuator dynamics is considered brie y and is discussed in relation to the control algorithm used to balance the robot. Electrical and software design implementations are also presented with a focus on effective implementation of the proposed control algorithms.
Simulated and physical testing results show that the proposed balance bot and controller design are not only feasible but effective as a means of achieving robust performance under dynamic tracking profiles provided by the remote control.
42
Roštek, Martin. "Estimace rychlosti vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378739.
Full textAbstract:
Rýchlosť vozidla je jednou z kľúčových stavových premenných, ktorej znalosť je potrebná v reálnom čase a s vysokou presnosťou, aby mohla slúžiť ako vstupná veličina pre systémy kontroly dynamiky vozidla. Jej priame meranie vo vozidle je však finančne náročné. Riešením tohoto problému môže byť použitie meraní zo senzorov bežne dostupných na palube vozidla a ich následný prepočet na rýchlosť vozidla. Tieto merania sú však veľmi zaťažené procesným šumom, čo vyplýva z komplexnosti pohybu vozidla. Preto je nutné vyvinúť algoritmus so schopnosťou vysporiadať sa s týmito negatívnymi vplyvmi. Algoritmus prezentovaný v tejto práci odhaduje pozdĺžnu rýchlosť vozidla s použitím meraní uhlových rýchlostí štyroch kolies, pozdĺžnej akcelerácie, momentov motora, rýchlosti otáčania okolo zvislej osi a natočenia volantu. Algoritmus bol testovaný na veľkom počte situácií považovaných za kritické na odhad rýchlosti vozidla, ako napríklad prudká akcelerácia na vozovke s nízkym koeficientom trenia, núdzové brzdenie s aktiváciou ABS, či jazda v kopci s kolesami v preklze, prinášajúc uspokojujúce výsledky.
43
Clarsen, Georgine. "The vote on wheels : Australian women and motoring, 1915-1945 /." Connect to thesis, 1997. http://eprints.unimelb.edu.au/archive/00000649.
Full text
44
Tseng, Wei-Tung, and 曾威棟. "In-Wheel Motor Control of Electric Vehicle." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/8g4ez7.
Full textAbstract:
碩士國立臺北科技大學
車輛工程系所
97
In recent years, the environmental protection problems such as pollution, limited crude oil resources, and drastic rises in fossil fuel prices are great challenges for the new generation of automotive development. Therefore, a lot of researches and development activities are focused on electric vehicles research. The new generation of electric vehicles driven technology is motor installed inside the wheel. The brake system and drive system was integrated with the wheel motor control technology. For such driving technology, the wheel motor output torque is relatively large, and the wheel motor torque control and rotation speed control are important discussing factors. In addition, when vehicles running in the wet ground or driving across slippery road surface with high speed, the acceleration slip of the electric vehicles driving wheel will be increase, and the adhesion between tire and road surface will be reduced to include vehicle slip phenomenon, or vehicle out of control. Moreover, the road surface is not as the ideal perfect and uniform, for example, water surface, sand surface or ice surface, etc. Then, the road surface friction coefficient is greater difference. Therefore, the slip control can effectively improve the safety of the vehicles, and increase the vehicle driving stability and security. In this study, the self-organizing fuzzy control theory (SOFC) is using to control the rotational speed and motor torque of the in-wheel motor, and then the vehicle speed. Finally, the vehicles anti-slip stability control problem is studied.
45
Liu, Chia-Hsi, and 劉佳熹. "Optimal Design of Axial Flux Wheel Motor." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/37661317774150218006.
Full textAbstract:
碩士國立臺灣大學
機械工程學系研究所
86
Recently, direct-driven wheel motors have been widely applied to electric vehicles, where transmission mechanism and gearbox are not necessary, and ther efore, mechanical loss can be avoided. Axial-flux permanent magnet (AFPM) moto rs can be designed and constructed to achieve a higher torque-to-weight ratio and motor efficiency, and are suitable for wheel motor applications. This pape r presents the procedure of an optimal design of axial-flux permanent motors. First, a set of mathematical models is developed to describe the APFM design i n terms of the design variables. Then, the optimal shape of motor is determine d by the optimization technology to meet various specifications and constraint s. The design results are investigated by the 2D electromagnetic analysis, and the final design decision is made through engineering experience and manufact uring requirements.
46
Huang, Ying-ruei, and 黃盈瑞. "Development and Traction Control of Front-wheel Drive In-wheel Motor Electric Vehicles." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/65565605896637143344.
Full textAbstract:
碩士國立臺南大學
綠色能源科技研究所碩士班
100
The paper proposed the development and traction control system (TCS) of a front-wheel drive electric vehicle (EV). Two in-wheel motors were utilized in the system to construct a power-scattered EV. The permanent magnet servo motor can individually control the motor power output and immediately limit the torque individual. This paper imposed the maximum transmission torque estimation (MTTE) system as the core of TCS for preventing the vehicle skid. The control algorithm is embedded in a high speed microprocessor, which can real-timely monitor feedback signals. In the torqure ouput, a plenary gearbox was employed to amplify the motor torque. This paper also used the simulation software “CarSim” to analyze the anti-skid performace of the prototype EV which is called Corsa-EV. The crucial issues include vehicle dynamics construction and anti-skid evaluation. From the results of simulation, it is obvious that the propsed EV can achieve an accetptable performance of stability and safety with the enhancement of MTTE.
47
Wang, Qi-Quan, and 王啟全. "Optimal Design and Implementation of In-Wheel Motor." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/44207425865843902449.
Full textAbstract:
碩士高苑科技大學
電機工程研究所
97
In this thesis, a novel systematic and efficient approach, using the fuzzy-based Taguchi method with multiple performance characteristics index (MPCI) is employed for obtaining the robust design of in-wheel permanent-magnet (PM) motor with both the lower torque ripple factor and higher efficiency. According to the geometrical parameters of the PM motor selects the controllable factors and their levels, such as the permanent magnet thickness in rotor, air-gap width, opening slot width and slot tooth width at stator, the proposed method first establishes the orthogonal array (OA) that is recommended by the Taguchi method then the multiple targets are coordinated by the fuzzy inference mechanism to obtain the better combination of the geometrical parameters for lower torque ripple factor and higher efficiency. The finite element method (FEM) is used as the analyzed tool of motor for torque ripple and performance analysis. MagneForce BLDC software is used as the platform for motor’s design and analysis. Results have shown that the proposed method can obtain the suitable motor’s geometric parameters for both reducing the cogging torque and enhancing the operating efficiency. In addition, a driver based on MC33033 IC with hall sensor is implemented to drive smoothly the in-wheel PM motor for achieving V/f speed control model. The driver, involving the power supply unit, control unit and power amplitude unit, has been realization. Integrating the driver and in-wheel PM motor, the test results have shown the drive system has the excellent performance that suits to be applied in electric vehicles (EV), such as the electric scooter and electric bicycle.
48
Zhao, Ying-Zhi, and 趙英志. "Development of a Direct-Drive Axial Flux Wheel Motor." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/55403443847631481348.
Full textAbstract:
碩士淡江大學
機械與機電工程學系碩士班
93
The purpose of this paper is to design a direct-drive axial flux wheel motor. The motor dimensions are determined based on the required rating. A set of magnetic circuit models are used to calculate the basic motor characteristics and the design which has the shortest axial length is selected. The static and dynamic performance of the designed motor are calculated and verified with a finite element software. A prototype motor and driver is built to verify the performance of the motor experimentally. Finally, a passive magnetic bearing is designed to reduce the radial force acting on the motor bearings; the analysis shows that the bearings’ life can be extended with this design.
49
Cheung, Cheng-Huei, and 張崢輝. "Analysis and Optimal Design of Axial Flux Wheel Motor." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/80838751761000541718.
Full textAbstract:
碩士國立臺灣大學
機械工程學研究所
88
Axial-flux permanent magnet (AFPM) motors can be designed to achieve a higher torque-to-weight ratio and motor efficiency, and are suitable for wheel motor applications. In permanent magnet reluctance motors, both magnets and electric steel are placed in the rotor. A reluctance torque component is added to total torque while there are steel in the rotor. This paper presents the procedure of an optimal design of APFM motor, including brushless dc motor and permanent magnet reluctance motors. First, a set of mathematical model is developed to describe the APFM design in terns of the design variables. Then the optimal shape of motor is determined by the optimization technology to meet various specifications. The design results are investigated by the 2D electromagnetic analysis. Finally comparison of brushless dc motor and permanent magnet reluctance motors is made.
50
Pan, Yann-Guang, and 潘彥光. "The Optimal Waveform Research of Direct-Driven Wheel Motor." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/48594313239473438823.
Full textAbstract:
碩士國立臺灣大學
機械工程學研究所
87
The optimal design of the driving current pattern for a disc-type axial-flux brushless DC motor is proposed in this paper. The electro-magnetic dynamical model of the motor is established, describing the relationship between the output torque and driving current pattern is obtained by maximizing the torque output with respect to the rotor shift. Therefore, the average torque produced by the exciting current with optimal phase angle is greater than that by traditional three-phase-on current pattern with fixed 120-degree phase shift. The results are verified with experiments on the motor performance by the use of dynamometer.