Journal articles: 'Multiphase electrical machine'

1

Gutierrez-Reina, Daniel, Federico Barrero, Jose Riveros, Ignacio Gonzalez-Prieto, Sergio Toral, and Mario Duran. "Interest and Applicability of Meta-Heuristic Algorithms in the Electrical Parameter Identification of Multiphase Machines." Energies 12, no. 2 (January 19, 2019): 314. http://dx.doi.org/10.3390/en12020314.

Full text

Abstract:

Multiphase machines are complex multi-variable electro-mechanical systems that are receiving special attention from industry due to their better fault tolerance and power-per-phase splitting characteristics compared with conventional three-phase machines. Their utility and interest are restricted to the definition of high-performance controllers, which strongly depends on the knowledge of the electrical parameters used in the multiphase machine model. This work presents the proof-of-concept of a new method based on particle swarm optimization and standstill time-domain tests. This proposed method is tested to estimate the electrical parameters of a five-phase induction machine. A reduction of the estimation error higher than 2.5% is obtained compared with gradient-based approaches.

APA, Harvard, Vancouver, ISO, and other styles

2

Caruso, Massimo, Antonino Oscar Di Tommaso, Fabrizio Marignetti, and Rosario Miceli. "A General Investigation on the Differential Leakage Factor for Symmetrical and Asymmetrical Multiphase Winding Design." Energies 13, no. 20 (October 16, 2020): 5414. http://dx.doi.org/10.3390/en13205414.

Full text

Abstract:

This work provides an investigation based on a fast estimation of the degree of unbalance (D.U.%) and the differential leakage factor (σ0) of multiphase electrical machine windings. This analysis is carried out by exploring almost 5000 combinations in terms of number of slots, pole pairs, phases and layers. The variability of the leakage factor is examined for each condition, defining an optimal region for its minimization. As a result, an extended mapping is carried out for both the degree of unbalance and the leakage factor, providing a useful tool during the early design stage of winding configurations for multiphase electric machines, even with slight asymmetries. The results obtained from this investigation are validated through finite element analysis and demonstrate that the differential leakage factor can be significantly reduced by adopting winding configurations with slight asymmetries, which also represent a valuable alternative in the electrical machine design.

APA, Harvard, Vancouver, ISO, and other styles

3

Laksar, Jan, Radek Cermak, and Karel Hruska. "Challenges in the Electromagnetic Design of Multiphase Machines: Winding and Equivalent Circuit Parameters." Energies 14, no. 21 (November 4, 2021): 7335. http://dx.doi.org/10.3390/en14217335.

Full text

Abstract:

The usage of multiphase electrical drives expands the operation possibilities of electrical machines and opens new directions of research on inverter-fed electrical machines. With an increasing number of phases, the standard approach of the electromagnetic design of machines has to be generalized to m-phase systems, which is not usually respected in the literature focused on electric machine design, and it is rarely published. This paper summarizes the specific problems linked with the design of machines with different numbers of phases, focusing on the winding design and the calculation of equivalent circuit parameters. In addition to the direct effect of different numbers of phases, the impact of injecting higher order time harmonic components on the electromagnetic design of electric machines is analyzed. The obtained analytical results are verified by the measurement of a nine-phase experimental induction motor.

APA, Harvard, Vancouver, ISO, and other styles

4

Zhu, Ziqiang, Shensheng Wang, Bo Shao, Luocheng Yan, Peilin Xu, and Yuan Ren. "Advances in Dual-Three-Phase Permanent Magnet Synchronous Machines and Control Techniques." Energies 14, no. 22 (November 10, 2021): 7508. http://dx.doi.org/10.3390/en14227508.

Full text

Abstract:

Multiphase electrical machines are advantageous for many industrial applications that require a high power rating, smooth torque, power/torque sharing capability, and fault-tolerant capability, compared with conventional single three-phase electrical machines. Consequently, a significant number of studies of multiphase machines has been published in recent years. This paper presents an overview of the recent advances in multiphase permanent magnet synchronous machines (PMSMs) and drive control techniques, with a focus on dual-three-phase PMSMs. It includes an extensive overview of the machine topologies, as well as their modelling methods, pulse-width-modulation techniques, field-oriented control, direct torque control, model predictive control, sensorless control, and fault-tolerant control, together with the newest control strategies for suppressing current harmonics and torque ripples, as well as carrier phase shift techniques, all with worked examples.

APA, Harvard, Vancouver, ISO, and other styles

5

Muc, Adam, Marcin Morawiec, and Filip Wilczyński. "Steady-State Vibration Level Measurement of the Five-Phase Induction Machine during Third Harmonic Injection or Open-Phase Faults." Energies 16, no. 2 (January 11, 2023): 838. http://dx.doi.org/10.3390/en16020838.

Full text

Abstract:

Multiphase electric machines are increasingly used in various industries and for electromobility. Complex systems have been developed for the control and powering of multiphase machines, which require verification. The quality of control and the power supply of electric machines is usually evaluated by analyzing various electrical parameters. On the other hand, taking into account the fact that a motor is an electrical-mechanical object, its full diagnostics should also include the analysis of vibration signals to verify the operation of the motor as a mechanical device. In this paper, a sensorless control algorithm was studied and applied to a 5-phase induction motor. Various scenarios were considered; in particular, the operation of the studied motor in the absence of one or two phases and in the case of the introduction of the third harmonic to increase the torque was analyzed. In the scenarios considered, the motor was connected to another machine and operated with no load as well as with a preset load. The results obtained were analyzed in the time and frequency domain and were related to the standards used.

APA, Harvard, Vancouver, ISO, and other styles

6

Bermúdez, Mario, Federico Barrero, Cristina Martín, and Manuel Perales. "Performance Analysis of Direct Torque Controllers in Five-Phase Electrical Drives." Applied Sciences 11, no. 24 (December 16, 2021): 11964. http://dx.doi.org/10.3390/app112411964.

Full text

Abstract:

The industrial application of electric machines has grown in the last decades, thanks to the development of microprocessors and power converters, which have permitted their use as variable-speed drives. Although three-phase machines are the common trend, the interest of the research community has recently focused on machines with more than three phases, known as multiphase machines. The principal reason lies in the exploitation of their advantages in terms of reliability, i.e., post-fault operating capability. Additionally, multiphase machines provide a better current distribution among phases, and lower current harmonic production in the power converter, than conventional three-phase machines. However, multiphase drive applications require the development of complex controllers to regulate the torque (or speed) and flux of the machine. In this regard, direct torque controllers have appeared as a viable alternative due to their easy formulation and high flexibility to incorporate control objectives. However, these controllers face some peculiarities and limitations in their use that require attention. This work aims to tackle direct torque control as a viable alternative for the regulation of multiphase drives. Special attention will be paid to the development of the control technique and the expected benefits and limitations in the obtained results. Case examples based on symmetrical five-phase induction machines with distributed windings in the motoring mode of operation will be used to this end.

APA, Harvard, Vancouver, ISO, and other styles

7

Fleitas, Ariel, Magno Ayala, Osvaldo González, Larizza Delorme, Carlos Romero, Jorge Rodas, and Raul Gregor. "Winding Design and Efficiency Analysis of a Nine-Phase Induction Machine from a Three-Phase Induction Machine." Machines 10, no. 12 (November 28, 2022): 1124. http://dx.doi.org/10.3390/machines10121124.

Full text

Abstract:

Multiphase machines are a hot research topic in control theory and industrial applications such as electric cars. However, the availability to buy them in the market is limited or null. For this reason, it is common to rewind it from a three-phase commercial machine. In this context, the aim of this paper is two-fold. First, to introduce a straightforward procedure to rewind a nine-phase induction machine from a three-phase one. For that purpose, a study of the three-phase induction motor was performed, which included selecting a new winding design, calculating stator coils, and simulating tests with ANSYS Maxwell software to validate the design. Secondly, a performance analysis comparing the power losses through experimental tests performed to obtain the electrical parameters of both nine-phase and three-phase topologies is presented.

APA, Harvard, Vancouver, ISO, and other styles

8

Panteleev, S. V., A. N. Malashin, and A. E. Kaleda. "Development of a vector control system of the semiconductor converter, which will provide a polyharmonic operating mode of a polyphase electric machine." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 65, no. 3 (October 21, 2020): 332–40. http://dx.doi.org/10.29235/1561-8358-2020-65-3-332-340.

Full text

Abstract:

A system for vector control of current in the circuit of a polyphase electric machine has been developed. For this, on the basis of the analysis of electromagnetic processes in a multiphase semiconductor converter of electrical energy, its discrete mathematical model was created, which takes into account the redistribution of electromagnetic energy by individual spatial harmonic components depending on the number of phases. Using this mathematical model and the scheme of injection of higher current harmonics, which provides a polyharmonic mode of operation of a semiconductor converter, a method for independent control of the spatial harmonic components of the input current of the converter has been developed. The formation in each of the phases of polyharmonic currents, conjugated in shape and phase with the voltage supplying the converter, is carried out by means of control actions in the form of voltage vectors of a semiconductor switch, the implementation of which is carried out by the method of multiphase space-vector modulation. To check the developed provisions, a simulation model of a nine-phase semiconductor converter of electrical energy with a vector control system was created. The results of the study of the model confirmed the adequacy of the developed technical solutions, the use of which will ensure the most complete realization of the own advantages of a multiphase electric machine in order to generally improve the weight, size and energy indicators of the autonomous power supply system.

APA, Harvard, Vancouver, ISO, and other styles

9

Vikharev, D. Yu, and N. A. Rodin. "Model of implicit pole electric machine based on mathematical formulation of magnetic field in air gap." Vestnik IGEU, no. 6 (December 28, 2021): 27–37. http://dx.doi.org/10.17588/2072-2672.2021.6.027-037.

Full text

Abstract:

When modeling transient processes in electric power systems, the issue of designing reliable models of electrical machines is of great interest. The most difficult task is to design the models of synchronous and asynchronous machines. The purpose of the project is to develop mathematical models of synchronous and asynchronous machines based on a generalized model of an implicit-pole machine that considers the change of rotor speed, geometric shapes, and the type of rotor and stator windings. Methods of mathematical modeling of electromagnetic fields in the air gap based on Maxwell equations and methods of the theory of electrical circuits are applied. A system of nonlinear differential equations is considered as a mathematical model of a generalized implicit-pole machine. The key assumption made is the high magnetic permeability of the stator and rotor cores. Technical data of real electric machines have been used for verification. Mathematical models of an implicit pole synchronous machine and an asynchronous machine with a phase rotor have been developed. These models can be used to analyze transient processes in the aggregate without dividing them into electromagnetic and electromechanical ones. The novelty of the models is the fact of non-sinusoidal distribution of the magnetic field in the air gap, various types of multiphase AC windings and rejecting the principle of constant rotation frequency at the time step of the simulation. The proposed mathematical models can be used to solve design problems, to analyze the modes of electric power systems, the operation of relay protection and automation of electric power facilities, and emergency automation. In the future, the equations that consider the influence of the damper circuits and the peculiarities of the windings will be added to the developed mathematical models. The purpose of further research is to develop models of salient-pole synchronous machines and asynchronous machines with a squirrel-cage rotor.

APA, Harvard, Vancouver, ISO, and other styles

10

Akay, Ali, and Paul Lefley. "Torque Ripple Reduction Method in a Multiphase PM Machine for No-Fault and Open-Circuit Fault-Tolerant Conditions." Energies 14, no. 9 (May 2, 2021): 2615. http://dx.doi.org/10.3390/en14092615.

Full text

Abstract:

This paper presents a method that has been developed to reduce the torque ripples under healthy and open-circuit fault-tolerant (OCFT) conditions for a multiphase permanent magnet (PM) machine. For smooth torque, both the phase current and the back electromotive force (back-EMF) should be purely sinusoidal. To improve the torque in a multiphase machine, higher-order current harmonics are injected, which are related to the harmonics in the back-EMF. For this reason, generally, multiphase machines are designed with higher-order back-EMF harmonics. However, these harmonics produce ripples in the torque. In light of this, a torque ripple cancellation method has been developed that first determines an additional current component from the harmonic content of the back-EMF and then injects these additional components to cancel the torque ripple. It has been found that this new torque ripple cancellation method works for both faultless and faulty conditions in a five-phase PM machine. The method has been validated using Finite Element Analysis, and the results are presented in this paper.

APA, Harvard, Vancouver, ISO, and other styles

11

Martinez Ricardo, Diana Marcela, German Efrain Castañeda Jiménez, Janito Vaqueiro Ferreira, and Pablo Siqueira Meirelles. "Multiphase gas-flow model of an electrical submersible pump." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 73 (2018): 29. http://dx.doi.org/10.2516/ogst/2018031.

Full text

Abstract:

Various artificial lifting systems are used in the oil and gas industry. An example is the Electrical Submersible Pump (ESP). When the gas flow is high, ESPs usually fail prematurely because of a lack of information about the two-phase flow during pumping operations. Here, we develop models to estimate the gas flow in a two-phase mixture being pumped through an ESP. Using these models and experimental system response data, the pump operating point can be controlled. The models are based on nonparametric identification using a support vector machine learning algorithm. The learning machine’s hidden parameters are determined with a genetic algorithm. The results obtained with each model are validated and compared in terms of estimation error. The models are able to successfully identify the gas flow in the liquid-gas mixture transported by an ESP.

APA, Harvard, Vancouver, ISO, and other styles

12

CHARRAK, Naas, Abdallah KOUZOU, Belgacem Said KHAlDI, and Lazhri NEZLI. "Analysis of Multi-Phase qZ-Source Inverter with Maximum Constant Boost Control Technique." Electrotehnica, Electronica, Automatica 69, no. 1 (February 15, 2021): 37–43. http://dx.doi.org/10.46904/eea.21.69.1.1108005.

Full text

Abstract:

This paper proposes a topology of two-level qZ- source multiphase inverter based on maximum constant boost control algorithm which can be used to power multiphase machines. Indeed, these kinds of machines have many advantages compared to their counterpart three-phase machines, which are actually used extensively in many industries. On the other side, the qZ-source inverter has also many advantages compared to the conventional inverters, mainly high boosting capability, more freedom degrees of switching states and less voltage and current stresses of switches can be obtained. Such advantages among others make it to be a good candidate in many industrial applications. Thus, the present paper proposes the topology of two level five-phase qZ-source inverter, where the main aim is to be used for driving the five-phase machine and consequently benefiting from the merits of the advantages of both topologies of the machine and the inverter in building one combined topology. The simulations results obtained in this paper prove the quality of the improved performances of the proposed topology in comparison with previous works which can be a promising solution in many industrial applications based on the afore mentioned advantages.

APA, Harvard, Vancouver, ISO, and other styles

13

Brkovic, Bogdan, and Milos Jecmenica. "Calculation of Rotor Harmonic Losses in Multiphase Induction Machines." Machines 10, no. 5 (May 20, 2022): 401. http://dx.doi.org/10.3390/machines10050401.

Full text

Abstract:

The topic of this paper is the determination of rotor harmonic losses in multiphase machines. Specifically, harmonic losses occur in the rotor winding and core due to higher-order spatial harmonics of the flux density. This phenomenon influences machine parameters and overall performance and increases temperature rise in parts of the rotor. The flux density distribution is determined by the stator magnetomotive force harmonic content, which is directly related to the winding distribution. A cage-rotor asymmetrical six-phase induction machine is selected for this case study. An analysis of different stator winding topologies and their influence on harmonic losses is presented. A finite element-based method for calculating the contribution of individual stator magnetomotive force harmonics to the rotor losses is developed and described in the paper. The analysis includes scenarios with different phase current waveforms to emphasize the issues specific to the asymmetrical six-phase machine. It is found that the magnetomotive force components generated by non-torque-producing current components contribute significantly to harmonic losses. The obtained results can represent a foundation for optimal stator winding topology selection. This work is intended to motivate the development of new and the modification of existing models to properly include rotor harmonic losses during the design, performance prediction, and control of multiphase machines.

APA, Harvard, Vancouver, ISO, and other styles

14

Vu, Duc Tan, Ngac Ky Nguyen, Eric Semail, and Hailong Wu. "Adaline-Based Control Schemes for Non-Sinusoidal Multiphase Drives–Part I: Torque Optimization for Healthy Mode." Energies 14, no. 24 (December 9, 2021): 8302. http://dx.doi.org/10.3390/en14248302.

Full text

Abstract:

More degrees of freedom not only enable multiphase drives to be fault-tolerant but also allow non-sinusoidal electromotive forces (NS-EMFs) in high-quality vector control. NS-EMFs lead to lower costs of design and manufacturing of electrical machines. However, the presence of multi-harmonics in NS-EMFs possibly generates pulsating torque in both healthy and faulty conditions of multiphase drives. To facilitate the use of NS-EMFs, this two-part study proposes control schemes to adaptively improve torque quality of multiphase drives in dealing with multi-harmonics of NS-EMFs. The proposed schemes are based on a simple but effective type of artificial intelligence, Adaptive Linear Neuron (Adaline). The knowledge of multiphase drives including the harmonic ranks of NS-EMFs and the rotor position is exploited to design the online-trained optimal Adalines. The first part of this study is to propose a control scheme using an Adaline for healthy mode with high-quality torque regardless of numerous harmonics in NS-EMFs. The second part of this study introduces a control scheme using another Adaline for open-circuit faults. The proposed schemes are numerically and experimentally validated on a seven-phase permanent magnet synchronous machine (PMSM) possessing a high total harmonic distortion (THD = 38%) of NS-EMFs.

APA, Harvard, Vancouver, ISO, and other styles

15

Sui, Yi, Ping Zheng, Peilun Tang, Fan Wu, and Pengfei Wang. "A five-phase 20-slot/18-pole PMSM for electric vehicles." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (March 7, 2016): 439–55. http://dx.doi.org/10.1108/compel-02-2015-0106.

Full text

Abstract:

Purpose – The purpose of this paper is to investigate a five-phase permanent-magnet synchronous machine (PMSM) that features high-power density and high-fault-tolerant capability for electric vehicles (EVs). Design/methodology/approach – The five-phase 20-slot/18-pole PMSM is designed by finite-element method. Two typical rotor structures which include Halbach array and rotor eccentricity are compared to achieve sinusoidal back electromotive force (EMF). The influence of slot dimensions on leakage inductance and short-circuit current is analyzed. The method to reduce eddy current loss of permanent magnets (PMs) is investigated. The machine performances under both healthy and fault conditions are evaluated. Finally, thermal behavior of the machine is studied by Ansys. Findings – With both no-load and load performances considered, rotor eccentricity is proposed to reduce the harmonic contents of EMF. Increasing slot leakage inductance is an effective way to limit the short-circuit current. By segmenting PMs in circumferential direction, the PM eddy current loss is reduced and the machine efficiency is improved. With proper fault-tolerant control strategy, acceptable torque performance can be achieved under fault conditions. The proposed machine can safely operate under Class F insulation. Originality/value – So far, many researches focus on multiphase PMSMs used in aviation fields, such as fuel pump and electric actuator. Differing from PMSMs used in aviation applications, machines for EVs require characteristics like wide speed ranges and variable operating conditions. Hence, this paper proposes a five-phase 20-slot/18-pole PMSM for EVs. The proposed design methodology is applicable to multiphase PMSMs with different slot/pole combinations.

APA, Harvard, Vancouver, ISO, and other styles

16

Jedryczka, Cezary, Wojciech Szelag, and Zbigniew Jerry Piech. "Multiphase permanent magnet synchronous motors with fractional slot windings." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 35, no. 6 (November 7, 2016): 1937–48. http://dx.doi.org/10.1108/compel-03-2016-0120.

Full text

Abstract:

Purpose The purpose of this paper is to investigate advantages of multiphase permanent magnet synchronous motors (PMSM) with fractional slot concentrated windings (FSCW). The investigation is based on comparative analysis and assessment of FSCW PMSM wound as 3, 6, 9 and 12 phase machines suited for low speed applications. Design/methodology/approach The investigations are focussed on distortions of back electromotive (emf) and magnetomotive force (mmf) with the torque ripples and motors’ performance taken into account. The finite element models with the aid of customized computer code have been adopted for motor winding design and back emf, mmf and motor performance analyses. Findings The novel multiphase winding layouts were found to offer lower content of sub-harmonics in the mmf waveforms compared with the traditional three-phase machine designs. Moreover, the investigated multiphase machines exhibited higher average value of the electromagnetic torque, while the multiphase PMSM machines with FSCW were further characterized by significantly lower torque pulsations. Originality/value The analyses presented in this paper demonstrate that PMSM with FSCW are advantageous to their counterpart three-phase machines. Specifically, they offer higher performance and are more suitable to work with multiple drives supplying segmented winding system. This ability of using multi-drive supply for one motor offers flexibility and cost reduction while increasing fault tolerant power train system.

APA, Harvard, Vancouver, ISO, and other styles

17

Locment, F., E. Semail, and F. Piriou. "Design and study of a multiphase axial-flux machine." IEEE Transactions on Magnetics 42, no. 4 (April 2006): 1427–30. http://dx.doi.org/10.1109/tmag.2006.872418.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Palmerini, Luca, Jochen Klenk, Clemens Becker, and Lorenzo Chiari. "Accelerometer-Based Fall Detection Using Machine Learning: Training and Testing on Real-World Falls." Sensors 20, no. 22 (November 13, 2020): 6479. http://dx.doi.org/10.3390/s20226479.

Full text

Abstract:

Falling is a significant health problem. Fall detection, to alert for medical attention, has been gaining increasing attention. Still, most of the existing studies use falls simulated in a laboratory environment to test the obtained performance. We analyzed the acceleration signals recorded by an inertial sensor on the lower back during 143 real-world falls (the most extensive collection to date) from the FARSEEING repository. Such data were obtained from continuous real-world monitoring of subjects with a moderate-to-high risk of falling. We designed and tested fall detection algorithms using features inspired by a multiphase fall model and a machine learning approach. The obtained results suggest that algorithms can learn effectively from features extracted from a multiphase fall model, consistently overperforming more conventional features. The most promising method (support vector machines and features from the multiphase fall model) obtained a sensitivity higher than 80%, a false alarm rate per hour of 0.56, and an F-measure of 64.6%. The reported results and methodologies represent an advancement of knowledge on real-world fall detection and suggest useful metrics for characterizing fall detection systems for real-world use.

APA, Harvard, Vancouver, ISO, and other styles

19

Rezaoui, Mohamed Mounir, Lazhari Nezli, and Mohand Oulhadj Mahmoudi. "High Performances of Five–Phase Induction Machine Feeding by A [3 × 5] Matrix Converter." Journal of Electrical Engineering 65, no. 2 (March 1, 2014): 83–89. http://dx.doi.org/10.2478/jee-2014-0012.

Full text

Abstract:

Abstract In this paper, we study an analytic technique to control matrix converter for a four-quadrant five-phase induction machine drive with use PWM five intervals modulation strategy. The multiphase induction machine is feeding by a matrix converter using a three-phase network. Special emphasis is given to the sinusoidal five phase voltage in the output and five phase voltage input current modulation. Simulation results are presented.

APA, Harvard, Vancouver, ISO, and other styles

20

Mini, Youssouf, Ngac Ky Nguyen, Eric Semail, and Duc Tan Vu. "Enhancement of Sensorless Control for Non-Sinusoidal Multiphase Drives-Part I: Operation in Medium and High-Speed Range." Energies 15, no. 2 (January 15, 2022): 607. http://dx.doi.org/10.3390/en15020607.

Full text

Abstract:

This two-part study proposes a new sensorless control strategy for non-sinusoidal multiphase permanent magnet synchronous machines (PMSMs), especially integrated motor drives (IMDs). Based on the Sliding Mode Observer (SMO), the proposed sensorless control strategy uses the signals (currents and voltages) of all fictitious machines of the multiphase PMSMs. It can estimate the high-accuracy rotor positions that are required in vector control. This proposed strategy is compared to the conventional sensorless control strategy that applies only current and voltage signals of the main fictitious machine, including the fundamental component of back electromotive force (back EMF) of non-sinusoidal multiphase PMSMs. Therefore, in order to choose an appropriate sensorless control strategy for the non-sinusoidal multiphase PMSMs, these two sensorless control strategies will be highlighted in terms of precision with respect to rotor position and speed estimation. Simulations and the experimental results obtained with a non-sinusoidal seven-phase PMSM will be shown to verify and compare the two sensorless control strategies. In this part of the study (part I), only sensorless control in the medium and high-speed range is considered. Sensorless control at the zero and low-speed range will be treated in the second part of this study (part II).

APA, Harvard, Vancouver, ISO, and other styles

21

GOŁĘBIOWSKI, Marek. "Multiphase inset SPMSM machine with additional currents injection of the third harmonic." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 11 (November 5, 2016): 201–4. http://dx.doi.org/10.15199/48.2016.11.49.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Yepes, Alejandro G., Ignacio Gonzalez-Prieto, Oscar Lopez, Mario J. Duran, and Jesus Doval-Gandoy. "A Comprehensive Survey on Fault Tolerance in Multiphase AC Drives, Part 2: Phase and Switch Open-Circuit Faults." Machines 10, no. 3 (March 21, 2022): 221. http://dx.doi.org/10.3390/machines10030221.

Full text

Abstract:

Multiphase machines are very convenient for applications that require high reliability. In this two-part survey, the state of the art about fault tolerance in multiphase drives is reviewed. In Part 1, an overview including numerous fault types was presented, along with fundamental notions about multiphase drives. Here, in Part 2, the focus is placed on phase/switch open-circuit (OC) faults in particular, which have received the most attention in the literature. Phase OC failures involve OCs in stator phases or in converter-machine connections, and switch/diode OCs are frequently dealt with similarly or identically. Thanks to the phase redundancy of multiphase drives, their operation can be satisfactorily continued under a certain number of OCs. Nonetheless, the procedure to follow for this purpose is far from unique. For given OC fault conditions, numerous fault-tolerant possibilities can be found in the literature, each of them with different advantages and disadvantages. Moreover, a great variety of methods have also been devised to detect and diagnose phase/switch OC failures so that, as soon as possible, the most appropriate fault-tolerance measures are applied. Thus, given the broad literature about tolerance to phase/switch OC faults in multiphase drives, the survey presented here is expected to be of great interest for the research community and industry.

APA, Harvard, Vancouver, ISO, and other styles

23

Shi, Li-Wei, and Bo Zhou. "Comparative Study of a Fault-Tolerant Multiphase Wound-Field Doubly Salient Machine for Electrical Actuators." Energies 8, no. 5 (April 29, 2015): 3640–60. http://dx.doi.org/10.3390/en8053640.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Hsieh, Chia-Yeh, Hsiang-Yun Huang, Kai-Chun Liu, Chien-Pin Liu, Chia-Tai Chan, and Steen Jun-Ping Hsu. "Multiphase Identification Algorithm for Fall Recording Systems Using a Single Wearable Inertial Sensor." Sensors 21, no. 9 (May 10, 2021): 3302. http://dx.doi.org/10.3390/s21093302.

Full text

Abstract:

Fall-related information can help clinical professionals make diagnoses and plan fall prevention strategies. The information includes various characteristics of different fall phases, such as falling time and landing responses. To provide the information of different phases, this pilot study proposes an automatic multiphase identification algorithm for phase-aware fall recording systems. Seven young adults are recruited to perform the fall experiment. One inertial sensor is worn on the waist to collect the data of body movement, and a total of 525 trials are collected. The proposed multiphase identification algorithm combines machine learning techniques and fragment modification algorithm to identify pre-fall, free-fall, impact, resting and recovery phases in a fall process. Five machine learning techniques, including support vector machine, k-nearest neighbor (kNN), naïve Bayesian, decision tree and adaptive boosting, are applied to identify five phases. Fragment modification algorithm uses the rules to detect the fragment whose results are different from the neighbors. The proposed multiphase identification algorithm using the kNN technique achieves the best performance in 82.17% sensitivity, 85.74% precision, 73.51% Jaccard coefficient, and 90.28% accuracy. The results show that the proposed algorithm has the potential to provide automatic fine-grained fall information for clinical measurement and assessment.

APA, Harvard, Vancouver, ISO, and other styles

25

Singh, G. K., K. Nam, and S. K. Lim. "A Simple Indirect Field-Oriented Control Scheme for Multiphase Induction Machine." IEEE Transactions on Industrial Electronics 52, no. 4 (August 2005): 1177–84. http://dx.doi.org/10.1109/tie.2005.851593.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Wang, Yan, Jiaqiang Yang, Rongfeng Deng, and Guanghui Yang. "Parameters estimation for multiphase induction machine with concentrated windings through finite element method." IET Electric Power Applications 14, no. 10 (October 1, 2020): 1807–17. http://dx.doi.org/10.1049/iet-epa.2019.0869.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Panteleev, S. V., and A. N. Malashin. "Development of a relay-vector control system for a multi-phase semiconductor converter of electric energy." «System analysis and applied information science», no. 4 (January 28, 2021): 5–15. http://dx.doi.org/10.21122/2309-4923-2020-4-5-15.

Full text

Abstract:

A system of relay-vector control of current in the circuit of a polyphase electric machine has been developed. For this, on the basis of the analysis of electromagnetic processes in a multiphase semiconductor converter of electrical energy, its discrete mathematical model was created, which takes into account the redistribution of electromagnetic energy by individual spatial harmonic components, depending on the number of phases. Using this mathematical model, a method for relay control of spatial harmonic components of the input current of the converter in the “tube” has been developed. The formation of polyharmonic currents in each of the phases, conjugated in shape and phase with the voltage supplying the converter at each control period, is carried out by means of the optimal voltage vector of the semiconductor switch. To select the optimal control action, the objective function of the minimum deviation of the projections of the base voltage vectors of the semiconductor switch for the j-th combination of the state of the keys from the calculated control action determined by the mathematical model is used. An objective function of this type allows one to take into account different values of the amplitudes of the base voltage vectors of the semiconductor switch in the transformed orthogonal coordinate systems. In this case, there is no need to predict changes in the instantaneous values of the input current for one or two periods ahead, which is ensured by a decrease in the number of iterations to determine the optimal control action. To check the developed provisions, a simulation model of a nine-phase semiconductor converter of electrical energy with a relay vector control system was created. The results of the study of the model confirmed the adequacy of the developed technical solutions, the use of which will ensure the most complete realization of the own advantages of a multiphase electric machine in order to generally improve the weight, size and energy indicators of the autonomous power supply system.

APA, Harvard, Vancouver, ISO, and other styles

28

Sun, Xiangwen, Zicheng Liu, Dong Jiang, and Wubin Kong. "Multiphase Open-End Winding Induction Machine Drive With the Floating Capacitor." IEEE Transactions on Industry Applications 56, no. 5 (September 2020): 5013–22. http://dx.doi.org/10.1109/tia.2020.3009955.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Ting, Allen K., Javier E. Santos, and Eric Guiltinan. "Using Machine Learning to Predict Multiphase Flow through Complex Fractures." Energies 15, no. 23 (November 24, 2022): 8871. http://dx.doi.org/10.3390/en15238871.

Full text

Abstract:

Multiphase flow properties of fractures are important in engineering applications such as hydraulic fracturing, evaluating the sealing capacity of caprocks, and the productivity of hydrocarbon-bearing tight rocks. Due to the computational requirements of high fidelity simulations, investigations of flow and transport through fractures typically rely on simplified assumptions applied to large fracture networks. These simplifications ignore the effect of pore-scale capillary phenomena and 3D realistic fracture morphology (for instance, tortuosity, contact points, and crevasses) that lead to macro-scale effective transport properties. The effect of these properties can be studied through lattice Boltzmann simulations, but they require high performance computing clusters and are generally limited in their domain size. In this work, we develop a technique to represent 3D fracture geometries and fluid distributions in 2D without losing any information. Using this innovative approach, we present a specialized machine learning model which only requires a few simulations for training but still accurately predicts fluid flow through 3D fractures. We demonstrate our technique using simulations of a water filled fracture being displaced by supercritical CO2. By generating highly efficient simulations of micro-scale multiphase flow in fractures, we hope to investigate a wide range of fracture types and generalize our method to be incorporated into larger discrete fracture network simulations.

APA, Harvard, Vancouver, ISO, and other styles

30

Wang, Yan, Jiaqiang Yang, Sheng Li, Guanghui Yang, Rongfeng Deng, and Haseeb Hussain. "Multiplane Rotor Resistance Online Estimation Strategy for Multiphase Induction Machine Under Nonsinusoidal Power Supply." IEEE Transactions on Power Electronics 36, no. 8 (August 2021): 9487–500. http://dx.doi.org/10.1109/tpel.2021.3051213.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Wang, Yan, Jiaqiang Yang, Guanghui Yang, Sheng Li, and Rongfeng Deng. "Harmonic Currents Injection Strategy With Optimal Air Gap Flux Distribution for Multiphase Induction Machine." IEEE Transactions on Power Electronics 36, no. 1 (January 2021): 1054–64. http://dx.doi.org/10.1109/tpel.2020.3001124.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Panteleev, S. V., A. N. Malashin, D. V. Karkotskiy, and Yu V. Suchodolov. "Synthesis of the Algorithm of the Vector Width-Pulse Modulation in a Nine-Phase Active Voltage Rectifier." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 61, no. 4 (July 20, 2018): 334–45. http://dx.doi.org/10.21122/1029-7448-2018-61-4-334-345.

Full text

Abstract:

The article is devoted to the problems of synthesis of multiphase electromechanic modules consisting of a multiphase electrical machine (m > 3) and a multiphase controlled converter. In the multi-phase design of the electric machine, it is possible to obtain a trapezoidal electromotive force and to increase the specific power conversion provided that the EMF and the current at the output of the m-phase generator are matched. The development of the vector pulse width modulation algorithm for the m-phase active voltage rectifier is considered, which will make it possible to match the shape and phase of the currents and voltages at the output of the m-phase generator in order to obtain the maximum active power of the module under study. The analysis of possible combinations of states of the keys of a nine-phase active rectifier is carried out. Each key state is assigned a base vector in a fixed coordinate system. It is noted that there are a number of combinations in which two or more different key states correspond to one base vector. The system of basic vectors is differentiated into its constituent levels, sectors and subsectors. In order to obtain any given voltage vector that does not coincide with the base vectors, the method of spacevector modulation is used. This method provides using 100 % DC link voltage as compared with sinusoidal pulse width modulation (86.6 %). The goal of space-vector modulation for a nine-phase active voltage rectifier is to implement the resultant spatial vector of the output voltage with a given average value within the modulation period. For this, the three vectors nearest to the given base vector must be found. To implement a given voltage vector, a sequence of sampling the base vectors in the modulation period is given, providing one commutation (commutation of two complementary keys) while passing from one basic vector to another to reduce switching losses. Analytic relationships of the weight coefficients for the generators of vectors are obtained, as well as the equations of the boundaries of the subsectors that form a diagram of combinations of states of the circuit. The sequence of the calculations presented in the paper is a technique for realizing the vector pulse-width modulation in nine-phase controlled electrical energy converters.

APA, Harvard, Vancouver, ISO, and other styles

33

Iqbal, Arif, Farhad Ilahi Bakhsh, and Girish Kumar Singh. "Operation and Testing of Indirect Field Oriented Control of Asymmetrical Six-Phase Open-Ended Winding Induction Machine Using Hardware-in-Loop (HIL) Emulator." International Transactions on Electrical Energy Systems 2023 (January 6, 2023): 1–13. http://dx.doi.org/10.1155/2023/4623140.

Full text

Abstract:

This study deals with an asymmetrical six-phase open-ended winding induction machine in closed loop operation using indirect field-oriented control scheme. The closed loop scheme has been developed by using the two axis (d-q) modeling of six-phase induction machine in rotating synchronous reference frame and can be easily extended to any multiphase machine having the stator winding which are the multiple of three. Operation under steady-state is considered to develop the phasor diagram in closed loop operation of machine in the motoring mode. The performance of the asymmetrical six-phase induction machine (opened ended winding) is investigated in the entire four-quadrant operation. The complete machine drive system was developed by using MATLAB/Simulink, which was used to obtain analytical results in different modes. Furthermore, the analytical results in the motoring mode were experimentally validated through real-time simulation by using Typhoon hardware-in-loop (HIL) emulator.

APA, Harvard, Vancouver, ISO, and other styles

34

Abdel-Khalik, Ayman S., Ahmed M. Massoud, and Shehab Ahmed. "Application of Standard Three-Phase Stator Frames in Prime Phase Order Multiphase Machine Construction." IEEE Transactions on Industrial Electronics 66, no. 4 (April 2019): 2506–17. http://dx.doi.org/10.1109/tie.2018.2840497.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Slimene, Marwa Ben, and Mohamed Arbi Khlifi. "Investigation on the Effects of Magnetic Saturation in Six-Phase Induction Machines with and without Cross Saturation of the Main Flux Path." Energies 15, no. 24 (December 12, 2022): 9412. http://dx.doi.org/10.3390/en15249412.

Full text

Abstract:

The operational characteristics during transients are significantly influenced by magnetic saturation in electrical equipment. For the computation of steady-state rated operation in multiphase induction machines, the assumption of linear magnetic behavior of the iron core in classical machine models may be sufficient. The mathematical models of the considered models differ in terms of the existence or absence of dynamic cross-saturation effects. The approach that is most frequently used to examine the impact of magnetic saturation is based on the state-space variable representation of the mathematical model in dynamic axes (d–q). The purpose of this research is to investigate the effects of magnetic saturation on six-phase induction machines. In this study, a d–q transformation-based model of a six-phase induction machine (SPIM), including the magnetic saturation effect, is developed. The cross-saturation and the common mutual leakage inductance between the two sets of stators’ windings are then developed and analyzed, and the developed models were simulated and results are compared with and without cross-saturation. The main and leakage flux saturation, as well as the mutual coupling between the two windings, are all accounted for in the model, which is based on the vector space decomposition method. A significant increase in currents and voltage results from the highly saturated magnetic paths of the leakage fluxes in six-phase induction machines. In order to investigate the impact of cross-saturation, inductances computed using analytical methods and those without taking cross-saturation into consideration were compared. These outcomes are then transformed into a condensed current depending on parameter functions for transient machine models.

APA, Harvard, Vancouver, ISO, and other styles

36

Mesai-ahmed, Hamza, Abderrahim Bentaallah, Antonio J. Marques Cardoso, Youcef Djeriri, and Imed Jlassi. "Robust Neural Control of the Dual Star Induction Generator Used in a Grid-Connected Wind Energy Conversion System." Mathematical Modelling of Engineering Problems 8, no. 3 (June 24, 2021): 323–32. http://dx.doi.org/10.18280/mmep.080301.

Full text

Abstract:

This paper presents a field-oriented control (FOC) of a dual star induction generator (DSIG) applied in a grid-connected wind energy conversion system. Currently, the dual star induction machine (DSIM) is increasingly used among multiphase machines. The machine has two star-connections, sharing the same stator offset, by an electrical angle of 30° and fed by two parallel converters. Maximum power point tracking (MPPT) is illustrated in a first stage, in order to extract a maximum of power under fluctuating wind speed. In a second stage, vector control of a DSIG with FOC is described. Finally, voltage oriented control (VOC) is used to ensure the power factor unity on the grid side. The main contribution of the presented paper is the application of a simple architecture of an artificial neural network (ANN) controller in order to improve the robustness and stability of the system, especially against the parameter change. In comparison with the conventional control, which is known by its sensitivity, the proposed neural MPPT with neural FOC (NMPPT-NFOC) presents better performance under normal and abnormal conditions. The robustness and effectiveness of the proposed control has been validated through illustrative simulation results with different functional zones, and for fixed and variable wind speed.

APA, Harvard, Vancouver, ISO, and other styles

37

Yong Wang, K. T. Chau, Jinyun Gan, C. C. Chan, and J. Z. Jiang. "Design and analysis of a new multiphase polygonal-winding permanent-magnet brushless DC machine." IEEE Transactions on Magnetics 38, no. 5 (September 2002): 3258–60. http://dx.doi.org/10.1109/tmag.2002.802128.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Yepes, Alejandro G., Oscar Lopez, Ignacio Gonzalez-Prieto, Mario J. Duran, and Jesus Doval-Gandoy. "A Comprehensive Survey on Fault Tolerance in Multiphase AC Drives, Part 1: General Overview Considering Multiple Fault Types." Machines 10, no. 3 (March 14, 2022): 208. http://dx.doi.org/10.3390/machines10030208.

Full text

Abstract:

Multiphase drives offer enhanced fault-tolerant capabilities compared with conventional three-phase ones. Their phase redundancy makes them able to continue running in the event of faults (e.g., open/short-circuits) in certain phases. Moreover, their greater number of degrees of freedom permits improving diagnosis and performance, not only under faults affecting individual phases, but also under those affecting the machine/drive as a whole. That is the case of failures in the dc link, resolver/encoder, control unit, cooling system, etc. Accordingly, multiphase drives are becoming remarkable contenders for applications where high reliability is required, such as electric vehicles and standalone/off-shore generation. Actually, the literature on the subject has grown exponentially in recent years. Various review papers have been published, but none of them currently cover the state-of-the-art in a comprehensive and up-to-date fashion. This two-part paper presents an overview concerning fault tolerance in multiphase drives. Hundreds of citations are classified and critically discussed. Although the emphasis is put on fault tolerance, fault detection/diagnosis is also considered to some extent, because of its importance in fault-tolerant drives. The most important recent advances, emerging trends and open challenges are also identified. Part 1 provides a comprehensive survey considering numerous kinds of faults, whereas Part 2 is focused on phase/switch open-circuit failures.

APA, Harvard, Vancouver, ISO, and other styles

39

Jia, Huili, Jiaqiang Yang, Rongfeng Deng, and Yan Wang. "Loss Investigation for Multiphase Induction Machine under Open-Circuit Fault Using Field–Circuit Coupling Finite Element Method." Energies 14, no. 18 (September 9, 2021): 5686. http://dx.doi.org/10.3390/en14185686.

Full text

Abstract:

This paper focuses on the loss estimation for the multiphase induction machine (IM) operating under fault-tolerant conditions through the field–circuit coupling finite element method (FEM). Both one-phase and two-phase open-circuit faults of a seven-phase IM are researched, and different spatial positions of the fault phases are taken into consideration. The magnitudes and phase angles of the residual phase’s current are deduced based on the principle of equal magnitude of the residual phase currents and unchanged fundamental magnetic motive force (MMF). The magnetic fields’ coupling between the fundamental and harmonic planes is analyzed. Then, the time-stepping electromagnetic fields calculation of the seven-phase IM are carried out under the commercial software Simplorer–Maxwell environment. The transient and steady performance for both the health and fault conditions are obtained based on the rotor field-oriented control (RFOC) strategy. The Joule loss and iron loss are calculated for the torque step and slope responses. The seven-phase motor driving platform is established to verify the numerical calculation results. The proposed method is effective for predicting the loss and designing a reasonable operating range for multiphase IM operating under fault-tolerant conditions considering the thermal balance.

APA, Harvard, Vancouver, ISO, and other styles

40

Serra, João, Imed Jlassi, and Antonio J. Marques Cardoso. "A Computationally Efficient Model Predictive Control of Six-Phase Induction Machines Based on Deadbeat Control." Machines 9, no. 12 (November 23, 2021): 306. http://dx.doi.org/10.3390/machines9120306.

Full text

Abstract:

Model predictive current control (MPCC) has recently become a viable alternative for multiphase electric drives, because it easily exploits the inherent advantages of multi-phase machines. However, the prediction in MPCC requires a high number of voltage vectors (VVs), being therefore computationally demanding. In that regard, this paper proposes a computationally efficient MPCC of an asymmetrical six-phase induction machine drive (ASIMD) that reduces the number of VVs used for prediction. By using the characteristics of the deadbeat control (DB), the proposed method obtains a reference voltage vector (RVV), where its position will serve as a reference and integrates the MPCC scheme. Only 4 out of 13 predictions are needed to determine the best VV, dramatically reducing the algorithm computation. Experimental results for a six-phase case study compare the standard MPCC with the suggested method, confirming that deadbeat model predictive current control (DB-MPCC) shows that the execution time can be shortened by 48.8% and successfully improve the motor performance and efficiency.

APA, Harvard, Vancouver, ISO, and other styles

41

Wang, K., Z. Y. Gu, Z. Q. Zhu, and Z. Z. Wu. "Optimum Injected Harmonics Into Magnet Shape in Multiphase Surface-Mounted PM Machine for Maximum Output Torque." IEEE Transactions on Industrial Electronics 64, no. 6 (June 2017): 4434–43. http://dx.doi.org/10.1109/tie.2017.2669888.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Hasoun, Mhammed, Aziz El Afia, Mohamed Khafallah, and Karim Benkirane. "Field oriented control based on a 24-sector vector space decomposition for dual three-phase PMSM applied on electric ship propulsion." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (September 1, 2020): 1175. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1175-1187.

Full text

Abstract:

A Field Oriented Control (FOC) strategy based on a 24-Sector Vector Space Decomposition (24SVSD) technique used to control a Dual Three-Phase Permanent Magnet Synchronous Motor (DTP-PMSM) applied on electric ship propulsion prototype is presented in this paper. This machine is supplied by Dual Three-Phase Voltage Source Inverter (DTP-VSI). This study carried out on these multiphase machines has revealed that the large zero sequence harmonic current components on (z1, z2) subspace, constitutes major drawbacks; despite their advantages. The machine’s dynamic model is accomplished in three two-dimensional and orthogonal subspaces. In order to reduce more extra stator harmonic currents that produces losses, the current work is also concering of to consider the three different approaches for the sake of boosting the machine’s efficiency. Thus, the principle selection of the reference voltage vector and the time calculation method are presented in details. The proposed strategy effectiveness is validated by simulation results.

APA, Harvard, Vancouver, ISO, and other styles

43

Rahman, Ungku Mohamed Ismail Adrian Ungku Abdul, Wan Noraishah Wan Abdul Munim, Hang Seng Che, Mahdi Tousizadeh, and Khairul Safuan Muhammad. "Fault tolerance of asymmetrical six-phase induction machine during single open circuit fault to three open circuit faults using GUI." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 2 (June 1, 2020): 611. http://dx.doi.org/10.11591/ijpeds.v11.i2.pp611-617.

Full text

Abstract:

The fault tolerance of multiphase drive is favourable in the industry for its reliability and safety reasons. However, from the educational point of view, the post-fault capability of six-phase machine is still unclear. This paper presents the fault tolerance of asymmetrical six-phase induction machine (A6-IM) under one to three open-circuit faults using Graphical User Interface (GUI). In this study, the capability of A6-IM has been interpreted through a simple and user-friendly GUI helping students to have a better understanding on the current limits of A6-IM. The optimization of post-fault current references is based on maximum torque (MT) and minimum loss (ML). This work provides GUI highlighting the post-fault derating of A6-IM with single isolated neutral (1N) in two different modes namely MT and ML for educational purposes.

APA, Harvard, Vancouver, ISO, and other styles

44

Martin, Cristina, Federico Barrero, Manuel R. Arahal, and Mario J. Duran. "Model-Based Predictive Current Controllers in Multiphase Drives Dealing with Natural Reduction of Harmonic Distortion." Energies 12, no. 9 (May 3, 2019): 1679. http://dx.doi.org/10.3390/en12091679.

Full text

Abstract:

An important drawback in the application of model-based predictive controllers for multiphase systems is the relatively high harmonic content. Harmonics arise due to the fixed sampling-time nature and the absence of modulation methods in the control technique. Recent research works have proposed different procedures to overcome this disadvantage at the expense of increasing the complexity of the controller and, in most cases, the computational requirements. There are, however, natural ways to face this harmonic generation that have been barely explored in the scientific literature. These alternatives include the use of variable sampling times or the application of the observer theory, whose utility has been stated without excessively increasing the computational cost of the controller. This paper presents the basis of both methodologies, analyzing their interest as natural alternatives to mitigate the generation of harmonic components in modern electrical drives when using predictive controllers. A five-phase induction machine is used as a case example to experimentally validate the study and draw conclusions.

APA, Harvard, Vancouver, ISO, and other styles

45

Jedryczka, Cezary. "Comparative analysis of the three- and six-phase fractional slot concentrated winding permanent magnet machines." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 3 (May 2, 2017): 811–23. http://dx.doi.org/10.1108/compel-09-2016-0431.

Full text

Abstract:

Purpose The purpose of this paper is to analyse and compare the functional parameters of three- and six-phase permanent magnet synchronous motors (PMSM) with fractional-slot concentrated windings (FSCW). Design/methodology/approach The investigations are focused on the comparison of the distortions of back electromotive force (emf) and magnetomotive force (mmf) waveforms, as well as torque ripples, radial force spatial harmonics and motor performance studies. The finite element models of the test machine and a personally developed computer code have been used to calculate motor characteristics and analyse and synthesise multiphase winding layouts, respectively. Findings Compared with the traditional three-phase PMSM designs, the proposed six-phase machines are characterized by a significantly lower content of sub-harmonics in mmf waveform distribution. Moreover, the investigated six-phase machines exhibited a higher average value of electromagnetic torque, significantly lower torque ripples and a reduced value of low-order harmonics of the radial component of the electromagnetic force in the air-gap of the machine. Originality/value The analyses presented in this paper show that six-phase PMSM with FSCWs are advantageous to their counterpart three-phase machines. Specifically, they are more suited to working with multiple drives supplying a segmented winding system while simultaneously offering higher performance. This suitability to the use of a multi-drive supply for one motor offers flexibility and cost reduction while increasing the fault tolerance of a power train system.

APA, Harvard, Vancouver, ISO, and other styles

46

Selvan, Jayakumar, and Sreekanth Manavalla. "Numerical Analysis of E-Machine Cooling Using Phase Change Material." Energies 15, no. 15 (August 2, 2022): 5594. http://dx.doi.org/10.3390/en15155594.

Full text

Abstract:

The cooling of E-machines was investigated using phase change material (PCM). The PCM is widely used in the cooling of electronic components because of its heat-absorbing and cooling properties. In this study, PCM OM35 (50:50) and OM35 (60:40) were used for the cooling of E-Machines, which are commonly known as electric vehicle motors. Three different configurations, viz. no rib, two ribs, and four ribs, were studied to understand the impact of thermal behaviour on bracket cooling. The ribs were added in between the brackets to enhance the heat transfer. Numerical simulations were performed using the volume of fluid multiphase analysis approach to model the behaviour of phase change inside the brackets for 18 KW E-Machines. Based on the study, a four rib configuration showed good performance compared to no rib and two rib configurations, and heat transfer improved by 6%. Heat transfer is thus improved by increasing the number of ribs placed between the brackets. The cyclic heat load was applied to the best performing ribs to study the impact of different PCM materials OM35 (50:50) and OM35 (60:40).

APA, Harvard, Vancouver, ISO, and other styles

47

Sui, Yi, Zuosheng Yin, Luming Cheng, Ping Zheng, Dejia Tang, Chuan Chen, and Chuanze Wang. "Multiphase Modular Fault-Tolerant Permanent-Magnet Machine With Hybrid Single/Double-Layer Fractional-Slot Concentrated Winding." IEEE Transactions on Magnetics 55, no. 9 (September 2019): 1–6. http://dx.doi.org/10.1109/tmag.2019.2917031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

dos Reis, Ederson, Rodrigo Parizotto, Lucas Rossato Rocha, Evandro Claiton Goltz, Rodrigo Padilha Vieira, and Paulo Roberto Eckert. "DYNAMIC MODEL AND DRIVE OF MULTIPHASE YASA ELECTRIC MACHINE FOR ELECTRIC TRACTION." Eletrônica de Potência 28, no. 01 (January 31, 2023): 1–11. http://dx.doi.org/10.18618/rep.2023.1.0030.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Drozdowski, Piotr, and Dariusz Cholewa. "Voltage Control of Multiphase Cage Induction Generators at a Speed Varying over a Wide Range." Energies 14, no. 21 (October 29, 2021): 7080. http://dx.doi.org/10.3390/en14217080.

Full text

Abstract:

The subject of this publication is a method of controlling the DC voltage of a PWM rectifier supplied by a multiphase cage induction generator with the number of stator phases greater than three operating in a wide range of driving speeds. Voltage regulation is performed by changing the frequency and amplitude of the stator voltages with simultaneous switching of the phase sequence of these voltages. The step change of the voltage sequence is made in the designated ranges of the generator speed, which enables the stabilization of the output voltage in a wide range from the minimum speed of about 25% of the rated speed. Such sequence switching changes the number of pole pairs produced by the winding for each supply sequence. The difference compared to multi-speed induction machines is that, in the presented solution, there is only one winding, not a few, which enables good use of the machine’s magnetic core in the same dimensions as for the three-phase machine of a similar power. Steady-state characteristics and dynamic operation were obtained using laboratory measurements of a standalone nine-phase induction generator. The automatic control system maintained the output voltage at the set level, regardless of the generator load and driving power.

APA, Harvard, Vancouver, ISO, and other styles

50

Sun, Qian, William Ampomah, Junyu You, Martha Cather, and Robert Balch. "Practical CO2—WAG Field Operational Designs Using Hybrid Numerical-Machine-Learning Approaches." Energies 14, no. 4 (February 17, 2021): 1055. http://dx.doi.org/10.3390/en14041055.

Full text

Abstract:

Machine-learning technologies have exhibited robust competences in solving many petroleum engineering problems. The accurate predictivity and fast computational speed enable a large volume of time-consuming engineering processes such as history-matching and field development optimization. The Southwest Regional Partnership on Carbon Sequestration (SWP) project desires rigorous history-matching and multi-objective optimization processes, which fits the superiorities of the machine-learning approaches. Although the machine-learning proxy models are trained and validated before imposing to solve practical problems, the error margin would essentially introduce uncertainties to the results. In this paper, a hybrid numerical machine-learning workflow solving various optimization problems is presented. By coupling the expert machine-learning proxies with a global optimizer, the workflow successfully solves the history-matching and CO2 water alternative gas (WAG) design problem with low computational overheads. The history-matching work considers the heterogeneities of multiphase relative characteristics, and the CO2-WAG injection design takes multiple techno-economic objective functions into accounts. This work trained an expert response surface, a support vector machine, and a multi-layer neural network as proxy models to effectively learn the high-dimensional nonlinear data structure. The proposed workflow suggests revisiting the high-fidelity numerical simulator for validation purposes. The experience gained from this work would provide valuable guiding insights to similar CO2 enhanced oil recovery (EOR) projects.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Multiphase electrical machine'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles