Gotowe bibliografie tematyczne / Motor world

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Gotowa bibliografia na temat „Motor world”

Autor: Grafiati

Data publikacji: 29 lipca 2024

Data aktualizacji: 30 lipca 2024

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Artykuły w czasopismach na temat "Motor world"

INOUE, Akihisa, i Mamoru ISHIDA. "World-smallest Micro-geared Motor". Journal of the Society of Mechanical Engineers 108, nr 1042 (2005): 706–7. http://dx.doi.org/10.1299/jsmemag.108.1042_706.

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Leuthardt, Eric C., Gerwin Schalk, Daniel Moran i Jeffrey G. Ojemann. "THE EMERGING WORLD OF MOTOR NEUROPROSTHETICS". Neurosurgery 59, nr 1 (lipiec 2006): 1–14. http://dx.doi.org/10.1227/01.neu.0000243275.01470.c0.

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Rakhymbaev, A. B., R. Zh Kalgulova i M. R. Karipova. "WORLD PRACTICE OF MOTOR VEHICLE TAXATION". Vestnik of M. Kozybayev North Kazakhstan University, nr 4 (56) (10.01.2023): 99–108. http://dx.doi.org/10.54596/2309-6977-2022-4-99-108.

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The tax on vehicles is classified as direct and is credited to local budgets. Its role in the revenues of local budgets of the leading countries of the world is constantly increasing, as the number of vehicles has a constant upward trend. Even with the destruction of transport and logistics chains in the world, the number of cars is growing due to the emergence of new types of vehicles. In the near future, a transport revolution is expected in the world. And this is due not only to the growing use of electric vehicles, but also to the introduction of non-traditional modes of transport into the public sphere.Also, the calculation of transport tax is constantly changing and improving all over the world. In a word, it has a dynamic behavior, unlike, for example, such a tax as the land tax. In this regard, a brief study of the transport taxation of the leading countries should be carried out.

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Anson, Greg, i Mark Latash. "The first world motor control day". Human Movement Science 12, nr 6 (grudzień 1993): 713–14. http://dx.doi.org/10.1016/0167-9457(93)90012-e.

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Pasaribu, Christover. "Analysis Of The Effect Of One Phase Open Stator On The Performance And Temperature Of A Three Phase Induction Motor Cage Rotor". Jurnal Mekintek : Jurnal Mekanikal, Energi, Industri, Dan Teknologi 11, nr 1 (30.04.2020): 23–28. http://dx.doi.org/10.35335/mekintek.v11i1.10.

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Induction motors are alternating current motors that are most often used in the industrial world. Induction motors are used as pumps, compressors, fans, conveyors, and supporting other production propulsion equipment. The use of induction motors in industry is more profitable than DC motors or synchronous motors, one of the advantages is a strong and durable construction and easy maintenance and high efficiency. The problem of one of the open stator phases is one of the problems in the operation of an induction motor. Therefore, it is necessary to conduct a study in the form of analysis and research in the laboratory to see how the opening of one of the stator phases affects the performance and temperature rise of the induction motor. The test is carried out by overloading the induction motor by 0.5 Nm; 1.0 Nm; 1.5 Nm; 2.0 Nm; 2.5 Nm; 3.0 Nm. From the research conducted, it can be concluded that, among others, the opening of a single stator phase results in greater motor losses and an increase in motor temperature. Motor efficiency is better when the motor is in normal phase condition.

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Abdul-Jabbar, Ali Hussein. "VARIABLE VOLTAGE - FREQUENCY CONTROL OF A SINGLE PHASE INDUCTION MOTOR DRIVEN BY SHEPWM INVERTER". Journal of Engineering 15, nr 2 (1.06.2009): 3572–82. http://dx.doi.org/10.31026/j.eng.2009.02.05.

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Single phase AC induction motors are one of the widely used motors in the world, yet relatively little woke has been done in the applications of power electronic converter to these motors to achieve variable speed operation. When variable speed is required, it is usually achieved either by using auto transformer or by switching between two or more fixed winding configurations. The motor is analyzed as an unbalanced two phase system to determine the torque that can be expected under variable frequency control.The performance of capacitor-run single phase induction motor used in SHEPWM adjustable speed drives in the steady-state is investigated. The supply voltage-frequency law for the motor is selected in such a way as to insure a correct operation of the motor over the whole speed range.

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Agalwe, Rupa S. "Automatic Switching of Three Phase Induction Motor during Fault Condition". International Journal for Research in Applied Science and Engineering Technology 12, nr 6 (30.06.2024): 1178–81. http://dx.doi.org/10.22214/ijraset.2024.63284.

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Abstract: Three-Phase Induction Motor Automated Transition in Defective Conditions Maintaining the effective operation of three-phase induction motors is crucial in a variety of industrial contexts. However, malfunctions such as phase inconsistency, voltage drop, and overcurrent can seriously impair motor performance, leading to loss of operation and possible damage. This article introduces an automatic switching method designed to improve the fault-tolerance capacity of induction motors in order to address these issues. The system uses advanced fault detection algorithms to identify abnormal conditions quickly and enable a seamless transition to backup power or other configurations. It also incorporates preventive measures to guard against phase abnormalities and voltage variations that could harm the motor. Through simulation and real-world testing, the suggested system's dependability and effectiveness are confirmed, highlighting its potential to guarantee continuous motor running in industrial applications, a three-phase induction motor must be automatically switched on. A two-motor system a primary motor and a backup motor is shown in this study. If the primary motor fails, the backup motor is automatically turned on. Microcontroller design controls the entire switching process.

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Suthar, Bhivraj. "Design of energy efficient four finger robotic hand". IAES International Journal of Robotics and Automation (IJRA) 5, nr 1 (21.01.2016): 1. http://dx.doi.org/10.11591/ijra.v5i1.pp1-5.

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<span>Future would be the world of robotics. Human arm is the best serial manipulator in the world. End part of manipulator is known as End effector or hand. At the end of serial manipulator we always put gripper just like our hand. Today many mechanisms have been proposed for robotic hand. We proposed a novel mechanical design and we used one motor to operate the gripper mechanism and it consumes less electrical power than other gripper. For energy efficient robot we have to reduce the number of motors and have to look in the mechanical design. In this paper we targeted to make gripper more energy efficient. We used only one motor to operate four fingers symmetrically. Our proposed model has four fingers, each are placed orthogonally to each other. In market, other manufactures use single motor for motion of each finger. Each motor has its own power consumption capacity to manipulate the load on finger. We replaced all four motors with single motor by Geneva mechanism. So electrical power consumption reduced by 1/4th. Energy conservation point of view it is energy efficient system. This paper presents a methodology that has been applied for a design mechanism for energy efficient robotic hand with four fingers. Wide applications of gripper are in automobile industries. Automobile companies are used gripers and serial manipulators in plenty</span>

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Sevos, Jessica, Anne Grosselin, Jacques Pellet, Catherine Massoubre i Denis Brouillet. "Grasping the World: Object-Affordance Effect in Schizophrenia". Schizophrenia Research and Treatment 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/531938.

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For schizophrenic patients, the world can appear as deprived of practical meaning, which normally emerges from sensory-motor experiences. However, no research has yet studied the integration between perception and action in this population. In this study, we hypothesize that patients, after having controlled the integrity of their visuospatial integration, would nevertheless present deficit in sensory-motor simulation. In this view, we compare patients to control subjects using two stimulus-response compatibility (SRC) tasks. Experiment 1 is performed to ensure that visuo-spatial integration is not impaired (Simon Effect). Experiment 2 replicates a study from Tucker and Ellis (1998) to explore the existence of sensory-motor compatibility between stimulus and response (Object Affordance). In control subjects, the SRC effect appears in both experiments. In schizophrenic patients, it appears only when stimuli and responses share the same spatial localization. This loss of automatic sensory-motor simulation could emerge from a lack of relation between the object and the subject’s environment.

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Liu, Xiang, Mian Li i Min Xu. "A new anti-skid control method for electric vehicles using the motor torque and the wheel acceleration with experimental verification". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231, nr 3 (5.08.2016): 347–59. http://dx.doi.org/10.1177/0954407016639444.

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Driving electric vehicles by electric motors can result in many unique advantages for dynamic control of electric vehicles. With the superior fast and accurate torque control performance of electric motors, electric vehicles, in particular, can achieve higher levels of safety and handling performance. A simple, effective and efficient anti-skid control method specified for electric vehicles is proposed in this paper by considering the real-world resistance factors. This method is developed on the basis of sensing and regulating a newly defined parameter, namely the ratio of the drive motor torque to the angular acceleration of the wheels, both of which can be easily obtained for electric motors. The monotonic relationship between the slip ratio and the ratio of the drive motor torque to the angular acceleration of the wheels is proved under both acceleration conditions and deceleration conditions, by considering the real-world resistance factors. The simulations and the experimental results show that the ratio of the drive motor torque to the angular acceleration of the wheels can be efficiently used, instead of the slip ratio, in anti-skid control. The results indicate that electric vehicles can achieve high-performance vehicle motion control with more flexible and simplified configurations by using in-wheel electric motors.

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Rozprawy doktorskie na temat "Motor world"

Zhang, Fangyi. "Learning real-world visuo-motor policies from simulation". Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/121471/1/Fangyi%20Zhang%20Thesis.pdf.

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This thesis explores how simulation can be used to create the large amount of data required to teach a robot certain hand-eye coordination skills. It advances the state-of-the-art of deep visuo-motor policy learning by introducing a new modular architecture, a novel reinforcement learning exploration strategy, and adversarial discriminative transfer.

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Begley, Taylor A. "REDUCED FREQUENCY MOTOR STARTING FOR THIRD WORLD POWER SYSTEMS". UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_theses/607.

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People in modern industrialized societies live a blessed life relative to those who do not when it comes to some modern conveniences. While many think nothing of flipping on a light switch or running electric appliances, there are people in third world countries could not imagine such things. As service projects are being undertaken to bring such conveniences to those less fortunate, there often is the harsh reality of a strict budget. An item that commands a large portion of said budget is often the diesel generator used to provide the facility with electricity. Generators serving motor loads are typically oversized due to a large kVA starting requirement. This paper addresses an approach to this problem by temporarily restricting the generator fuel supply by pulling back the rack of the mechanical governor reducing the frequency and voltage output as a motor load is switched onto the system. By reducing the voltage and frequency output of the generator, the motor is switched on at a time when its typically poor power factor and resulting kVA requirement is mitigated by the lower voltage and frequency allowing for a smaller generator to be used.

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Andrei, Paul. "Real world heavy-duty vehicle emissions modeling". Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2048.

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Thesis (M.S.)--West Virginia University, 2001.
Title from document title page. Document formatted into pages; contains xviii, 100 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 98-100).

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Khan, ABM Siddiqur Rahman. "Evaluating real-world idle emissions from heavy-duty vehicles". Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4217.

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Thesis (M.S.)--West Virginia University, 2005.
Title from document title page. Document formatted into pages; contains xii, 58 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 55-58).

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Neuman, Urszula Monika. "Modelling and analysis of real world airport gate allocation problem". Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/28678/.

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With airports becoming busier and often struggling with insufficient capacity, the efficiency of the airports resource utilisation becomes more and more important all over the world. The efficiency may be improved by integration of the airport operations which historically were handled in separation. More effective resource utilisation would not only smooth the airport operation but also should have a positive environmental impact. The gate allocation problem is one of the important airport operations, which is often solved without considering the links with other airport operations. Modelling and analysis of new constraints which allow the ground movement information to be taken into consideration in the allocation planning in advance as well as design of appropriate solution methods are discussed. It is observed that when the additional information from the ground movement is incorporated in the allocation planning process the number of expected routing conflicts, both around gates and on taxiways, drops. This should results in a smoother airport operation during the day of operation. Data from Manchester Airport is used in this thesis to build the model, as well as to test and to validate the solution methods.

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Rajan, Brahmadevan V. P. "Plug in hybrid electric vehicle energy management system for real world driving". Thesis, University of Warwick, 2014. http://wrap.warwick.ac.uk/67891/.

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The energy management system (EMS) of hybrid electric vehicle controls the operation of two power plants; electric machine/battery and typically engine. Hence the fuel economy and emissions of hybrid vehicles strongly depend on the EMS. It is known that considering the future trip demand in devising an EMS control strategy enhance the vehicle and component performances. However existing such acausal EMS cannot be used in real time and would require prior knowledge of the trip vehicle speed profile (trip demand). Therefore rule based EMS which considers instantaneous trip demand in devising a control strategy are used. Such causal EMS are real time capable and simple in design. However rule based EMS are tuned for a set of driving cycles and hence their performance is vulnerable in real world driving. The research question is “How to design a real time capable acausal EMS for a plug in hybrid electric vehicle (PHEV) that can adapt to the uncertainties of real world driving”. In the research, the design and evaluation of a proposed EMS to deal and demonstrate in scenarios expected in real world driving respectively were considered. The proposed rule based acausal EMS is formulated over the estimated vehicle trip energy and driving information. Vehicle trip energy is the electric (battery) energy required to meet the trip demand estimated using known driving information. Driving information that can be considered are driver style, route distance and road types like urban and extra urban, with traffic as a sub function. Unlike vehicle speed, vehicle trip energy is shown to be relatively less dynamic in real world driving. For the proposed EMS evaluation, a commonly used parallel PHEV model was simulated. For driving information EMS was not integrated to a navigation system but manually defined. Evaluation studies were done for a driver, and traffic was not considered for simplicity. In the thesis, vehicle performance and credentials for real world applicability (real time capability and adaptability) of the proposed acausal EMS are demonstrated for various scenarios in real world driving; varied initial SOC, sequence of road types, trip distance and trip energy estimation. Over the New European Driving Cycle (NEDC) the proposed EMS vehicle performance is compared to a conventional rule based EMS. The proposed EMS fuel economy improvement is up to 11% with 5 times fewer number of engine stop-starts. Similarly in the validation study, with no prior knowledge of trip vehicle speed profile, the fuel economy improvement is up to 29% with 7 times fewer number of engine stop-starts. The simulation duration of the proposed EMS is as good as conventional rule based EMS. Hence the proposed EMS is potentially real time capable. The proposed EMS can adapt to a wide variation in trip energy (±15%) estimation and still perform better than the conventional rule based EMS. The proposed EMS can tolerate variation in trip demand estimation and no prior knowledge of trip vehicle speed profile is required, unlike other acausal EMS studies in the literature. A new PHEV EMS has been formulated. Through simulation it has been seen to deliver benefit in vehicle performance and real world applicability for varied scenarios as expected in real world driving. The key new step was to use vehicle trip energy in the formulation, which enabled rule based EMS to be acausal and potentially real time capable.

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Pizzamiglio, Sara. "Neuroimaging of human motor control in real world scenarios : from lab to urban environment". Thesis, University of East London, 2017. http://roar.uel.ac.uk/7306/.

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The main goal of this research programme was to explore the neurophysiological correlates of human motor control in real-world scenarios and define mechanism-specific markers that could eventually be employed as targets of novel neurorehabilitation practice. As a result of recent developments in mobile technologies it is now possible to observe subjects' behaviour and monitor neurophysiological activity whilst they perform natural activities freely. Investigations in real-world scenarios would shed new light on mechanisms of human motor control previously not observed in laboratory settings and how they could be exploited to improve rehabilitative interventions for the neurologically impaired. This research programme was focussed on identifying cortical mechanisms involved in both upper- (i.e. reaching) and lower-limb (i.e. locomotion) motor control. Complementary results were obtained by the simultaneous recordings of kinematic, electromyographic and electrocorticographic signals. To study motor control of the upper-limb, a labbased setup was developed, and the reaching movement of healthy young individuals was observed in both stable and unstable (i.e. external perturbation) situations. Robot-mediated force-field adaptation has the potential to be employed in rehabilitation practice to promote new skills learning and motor recovery. The muscular (i.e. intermuscular couplings) and neural (i.e. spontaneous oscillations and corticomuscular couplings) indicators of the undergoing adaptation process were all symbolic of adaptive strategies employed during early stages of adaptation. The medial frontal, premotor and supplementary motor regions appeared to be the principal cortical regions promoting adaptive control and force modulation. To study locomotion control, a mobile setup was developed and daily life human activities (i.e. walking while conversing, walking while texting with a smartphone) were investigated outside the lab. Walking in hazardous environments or when simultaneously performing a secondary task has been demonstrated to be challenging for the neurologically impaired. Healthy young adults showed a reduced motor performance when walking in multitasking conditions, during which whole-brain and task-specific neural correlates were observed. Interestingly, the activity of the left posterior parietal cortex was predictive of the level of gait stability across individuals, suggesting a crucial role of this area in gait control and determination of subject specific motor capabilities. In summary, this research programme provided evidence on different cortical mechanisms operative during two specific scenarios for "realworld" motor behaviour in and outside the laboratory-setting in healthy subjects. The results suggested that identification of neuro-muscular indicators of specific motor control mechanisms could be exploited in future "real-world" rehabilitative practice.

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Leverton, Timothy A. "The use of concurrent engineering methodologies : achieving world class product development performance in the automobile industry : executive summary". Thesis, University of Warwick, 1998. http://wrap.warwick.ac.uk/39025/.

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This research project is about product development strategy and practice in the automobile industry. Specifically, it concerns the transformation of Rover Group body and tool development capability over four years from 1993 to 1997. A single Rover Body and Pressings organisation was created in 1991. It encompassed the functions of Body Engineering, Press Tool Engineering, and Press Tool Manufacturing. As Engineering Director the Author had the opportunity to directly influence a significant portion of the body product creation process. At the start of the research period the product development performance of Rover Body and Pressings was weak. Major investments in new press equipment could not depend on in-house die technology. Quality and cost delivery incurred customer dissatisfaction. Resulting from the research are three innovations: The Engineering Quality Assurance Procedure was implemented as a disciplined stage/gate quality management system. A focused manufacturing strategy was implemented for die manufacturing based on die size. A new engineering design methodology was established utilising the scientific principles of metal forming technology as an integrated element in the design process. These innovations were applied within the strategic framework of a new model describing a system view of the product creation process for body, at enterprise level. The new product development process strategy was partially applied to two new vehicle programmes. One vehicle has since been initiated and delivered from within the new framework. Strategic targets were defined for product development at Rover Body and Pressings covering product quality, development lead time, press tool cost and programme financial budget. The targets for quality and lead time were met during the research period. Although substantial progress is evident in physical performance the targets for press tool cost and programme budget were not met. The major elements of the product development strategy applied in this research remain in place. The transfer of the strategic model of concurrent engineering to a wider context was demonstrated by applying it as part of the Rover Group product development reengineering project.

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Schubert, Michael [Verfasser]. "Brain network dynamics in goal-directed motor precision tasks in laboratory and real-world settings / Michael Schubert". Paderborn : Universitätsbibliothek, 2015. http://d-nb.info/1076082203/34.

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Schick, Joshua J. "Firing Point: Patrol Torpedo Boats during World War II". ScholarWorks@UNO, 2012. http://scholarworks.uno.edu/td/1602.

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At the beginning of American involvement in the Second World War the United States Navy developed a new class of vessel that had a tremendous impact during World War II. This vessel was the Patrol Torpedo boat. Originally designed to conduct torpedo attacks on enemy surface vessels, the PT boat successfully adapted multiple roles in addition to being a torpedo attack craft. The versatility of the Patrol Torpedo boat during World War II serving in these various roles and as an element of the US Navy has not been recognized by recent scholarship. Using primary sources from the National Archives in College Park, Maryland, and secondary sources this paper demonstrates that the Patrol Torpedo boat was a weapon that exemplified economy of force. A small inexpensive naval vessel was able to replace larger ships and work with different elements of the fleet to deny the use of coastal waters to the enemy.

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Książki na temat "Motor world"

Salter, Andrew. Trucks of the world. Hemel Hempstead: Simon & Schuster Young Books, 1994.

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Jeremy, Coulter, red. The illustrated encyclpedia of world motor racing. London: Marshall Cavendish, 1990.

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McLeod, Julie. The world motor industry: Anatomy by manufacturer. London: Economist Intelligence Unit, 1992.

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1962-, Jones Bruce, red. World motor racing circuits: A spectator's guide. London: Andre Deutsch, 1999.

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Davide, Mazzanti, red. Vespa: Italian style for the world. Firenze: Giunti, 2005.

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Pemberton, Max. World auto atlas and directory. London: Informa, 1999.

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Society of Motor Manufacturers and Traders. Statistical Department., red. Motor industry of Great Britain: World automotive statistics. London: Statistical Department, Society of Motor Manufacturers and Traders., 1991.

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1949-, Wu Angela Y., i United States. National Aeronautics and Space Administration., red. Sensory processing and world modeling for an active ranging device. Washington, D.C: Dept. of Computer Science and Information Systems, College of Arts and Sciences, American University, 1991.

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Capella, Paul. World commercial vehicle forecasts. London: Economist Intelligence Unit, 1995.

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Hester, Edward, Sarah R. Sphar i Anand Mehta. World light vehicles. Cleveland: Freedonia Group, 2000.

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Części książek na temat "Motor world"

Steven, Rob. "Domestic Crisis: Motor of Internationalisation". W Japan and the New World Order, 41–69. London: Palgrave Macmillan UK, 1996. http://dx.doi.org/10.1007/978-1-349-24317-4_2.

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Elliott, Iain, i Richard A. Gosselin. "Motor Vehicle Accidents: The Scourge of the Developing World". W Orthopaedic Trauma in the Austere Environment, 79–86. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29122-2_6.

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Li, Shu, i Michael Faure. "Motor Liability Insurance in a World with Autonomous Vehicles". W Осигурање и правно-економско окружење – шири и ужи оквир = Insurance and Legal-Economic Environment – Wider and Narrower Framework, 108–19. Београд: Удружење за право осигурања ; Удружење осигуравача Србије, 2022. http://dx.doi.org/10.18485/aida.2022.23.ch9.

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Kok, Ellen M., i Anique B. H. de Bruin. "The Neuroscience of Motor Expertise in Real-World Tasks". W The Science of Expertise, 218–37. New York, NY : Routledge, 2017. | Series: Frontiers of cognitive psychology: Routledge, 2017. http://dx.doi.org/10.4324/9781315113371-13.

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Tickell, Sam, Tom Evens i Hans Erik Næss. "The Long Winding Road: The Politics and Development of the World Rally Championship". W The History and Politics of Motor Racing, 45–71. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-22825-4_3.

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Mamadouh, Virginie. "Wikipedia: Mirror, Microcosm, and Motor of Global Linguistic Diversity". W Handbook of the Changing World Language Map, 3773–99. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02438-3_200.

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Mamadouh, Virginie. "Wikipedia: Mirror, Microcosm, and Motor of Global Linguistic Diversity". W Handbook of the Changing World Language Map, 1–27. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-73400-2_200-1.

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Balch, Tucker. "Integrating learning with motor schema-based control for a Robot Soccer Team". W RoboCup-97: Robot Soccer World Cup I, 483–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/3-540-64473-3_86.

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Hsieh, Cho-Han, Chun-Wei Wu i Jia-Jin Jason Chen. "Application of Cortical Optogenetic Stimulation of Animal Model for Modulating Motor Plasticity". W 7th WACBE World Congress on Bioengineering 2015, 84–87. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19452-3_23.

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Shijie, Yu, Xie Lei, He Huiruo, Zhang Hualin, Zhou Longhua i Liu Wen. "A DC Brushless PM Motor Driven Phptovoltaic Water Pumping System". W Proceedings of ISES World Congress 2007 (Vol. I – Vol. V), 1435–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75997-3_291.

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Streszczenia konferencji na temat "Motor world"

Raja, Selvakumar, Sasikumar Nandagopal, S. Jenoris Muthiya, Sathish Kumar R, Nakandhrakumar R. S PhD, Bilu JOHN, Abdul Umar, Aadithian Sankar, Karri Tyaga Raju i Kaviarasan Balasubramaniam. "Thermal Analysis of an Electric Motor in an Electric Vehicle". W WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2023. http://dx.doi.org/10.4271/2023-01-0532.

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<div class="section abstract"><div class="htmlview paragraph">Parametric thermal analysis of permanent magnet synchronous motor by considering real time driving cycle is presented. As driving motors of electric vehicle, permanent magnet motors exhibit high efficiency and high power density. However, they are susceptible to suffer irreversible demagnetization and insulation failure of coils under severe thermal condition. Therefore, it is essential to precisely predict heat losses and temperature distribution in driving motors under real time driving cycle. The thermal behavior of the driving motor is analyzed by means of thermal parametric methods. Here we are using simulation software to measure the temperature distribution and heat losses in the Driving motor, when an electric motor is operated for a certain amount of time the motor produces heat because of the Heat produced by the motor the performance, efficiency and reliability of the motor is affected.</div><div class="htmlview paragraph">Performing the Analysis method on the Motor that is designed according to the parameters such as power output, Torque, Efficiency, Reliability, and Sustainability. Design Required Cooling System for the Electric Motor for EV application. By Designing an Appropriate Cooling System we can Easily Dissipate the Heat that is produced by the motor and we can also see improvement in performance, Sustainability, Torque Efficiency and other parameters that are affected by the Heat produced by the Electric motor.</div></div>

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He, Song, Peng Zhang, Michael Muir i Benjamin Koch. "Rotor Optimization to Reduce Electric Motor Noise". W WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2023. http://dx.doi.org/10.4271/2023-01-0540.

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<div class="section abstract"><div class="htmlview paragraph">Electric motor is among the main sources of noise and vibration for electrified propulsion systems. This paper focuses on the electric motor rotor NVH optimization, which is identified as a key enabler to reduce the motor whine, and balances other performance such as motor torque and efficiency. First, conventional rotor NVH design technologies such as rotor skew and asymmetric rotor pole-to-pole design are discussed, along with their associated tradeoff including reduced motor torque and additional sideband orders. Next, a special notch feature is proposed on the rotor surface with one notch per pole at every q-axis. A DOE study leads to the optimal notch design which significantly reduces the dominant motor torque ripple order by up to 20 dB, with minimum impact to motor torque or loss. Further design studies are then performed to explore additional d-axis notches which are symmetrically located within the top layer magnet opening angles. Up to 6 dB reduction is achieved at the most dominant motor winding order, with small trade-off for motor peak torque. Lastly, a prototype baseline rotor design without notch and a rotor with optimized NVH notch are built and tested in a motor fixture and an electric drive unit. Measured vibration and sound power data confirm that rotor notch achieves up to 20 dB reduction, and the optimal design is successfully implemented in the electric motors for General Motors Ultium electric drive units.</div></div>

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Deng, Lei, Jin Zhao, Donghong Ning, Pak Wong, Jing Zhao i Weihua Li. "Design of a Dual-Motor Powertrain with Magnetorheological Planetary Transmission for Electric Vehicles". W WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2024. http://dx.doi.org/10.4271/2024-01-2636.

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<div class="section abstract"><div class="htmlview paragraph">The powertrain system plays a crucial role in electric vehicles, exerting significant impact on both the dynamic and economic performances. A breakthrough has been observed by using the dual-motor powertrain system, which outperformed its single-motor counterparts. This study reports a dual-motor powertrain with magnetorheological technology. The powertrain consists of two motors, two magnetorheological brakes and a planetary gear set. Via regulating the brakes, the power transmission flow can be controlled to realise different torque ratios and velocities. The synergetic control of motors and brakes is capable of achieving smooth gear shifting without interruption. This paper details the design of the powertrain system: the structural configuration of the magnetorheological brakes is highlighted, the magnetic field distribution of the brakes under different currents is simulated by COMSOL Multiphysics, and the torque capacities of the brake are also calculated. Future work will focus on the control algorithm development and experimental evaluation of the powertrain system.</div></div>

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He, Song, Vinod Peddi i Le Chang. "Torque Ripple Cancellation to Reduce Electric Motor Noise for Electric Vehicles". W WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2024. http://dx.doi.org/10.4271/2024-01-2215.

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<div class="section abstract"><div class="htmlview paragraph">Electric motor whine is a major NVH source for electric vehicles. Traditional mitigation methods focus on e-motor hardware optimization, which requires long development cycles and may not be easily modified when the hardware is built. This paper presents a control- and software-based strategy to reduce the most dominant motor order of an IPM motor for General Motors’ Ultium electric propulsion system, using the patented active Torque Ripple Cancellation (TRC) technology with harmonic current injection. TRC improves motor NVH directly at the source level by targeting the torque ripple excitations, which are caused by the electromagnetic harmonic forces due to current ripples. Such field forces are actively compensated by superposition of a phase-shifted force of the same spatial order by using of appropriate current. A feedforward harmonic current generation module is developed, which allows the application of harmonic current commands to a motor control system with adjustable magnitude and phase. In the 3-phase, 8-pole AC machine with concentrated windings of this study, both 5<sup>th</sup> and 7<sup>th</sup> electric order harmonic currents are injected in the stationary reference frame to cancel the 6<sup>th</sup> electric order torque ripple in the synchronous reference frame, which corresponds to the most dominant 24<sup>th</sup> mechanical order. Test data confirm that TRC is highly effective in reducing the motor whine by 10+ dB over a wide range of motor torque. Loss study is also performed which shows TRC has a minimal impact on the motor efficiency. Overall, TRC offers a flexible NVH solution without hardware change and has minimum impact on motor performance or efficiency. The technology has been successfully implemented in GM’s Ultium electric propulsion systems.</div></div>

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De Santis, Thomas M., Charles T. Adams, Louis Molnar, John Washington, Ronald E. Orlando i Robert D. Banta. "Motor Vehicle Fire Investigation". W SAE World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2008. http://dx.doi.org/10.4271/2008-01-0555.

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Islam, Md Zakirul, Amnish Singh, Anastasios Arvanitis, Matthew Younkins, Siyu Leng, Paul Carvell, Adya Tripathi, Zhiqian Chen i Andrew Phillips. "Efficiency Improvement of Electric Motor Drives Using Dynamic Motor Drive Technology". W WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2022. http://dx.doi.org/10.4271/2022-01-0721.

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Jing, Junchao, Weishan Huang, Yiqiang Liu, Zhengxing Dai i Junzhi Zhang. "Research on Motor Control and Application in Dual Motor Hybrid System". W WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2024. http://dx.doi.org/10.4271/2024-01-2220.

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<div class="section abstract"><div class="htmlview paragraph">This paper analyzes the current control, mode control and boost strategy of permanent magnet synchronous motor in dual hybrid system, which has good stability and robustness. Current control includes current vector control, MTPA control, flux weakening control, PI current control and SVPWM control. Motor mode includes initialization mode, normal mode, fault mode, active discharge mode, power off mode, battery heating mode and boost mode. The boost strategy of the hybrid system is based on boost mode management, boost target voltage determination and boost PI control. The specific content is as follows: Boost mode control. Boost mode includes initial mode, normal mode, off mode and fault mode. Boost target voltage is determined. Boost converter is controlled by variable voltage, which depends on the operation status of the motor and generator.. In order to improve the overall performance of the voltage control strategy, the voltage control strategy of the boost converter is dynamically adjusted by feeding the motor running state to the converter in real time, and the bus voltage is optimized. The motor application of the FOC strategy in the hybrid power system is the battery thermal control. The specific content is as follows: SVPWM control. SVPWM is based on the ideal flux loop of the three-phase symmetric motor stator powered by the three-phase symmetric sinusoidal wave as the reference standard, and the appropriate switching is carried out with different switching modes of the three-phase inverter, so as to form PWM waves and form actual flux vectors to track their accurate flux loops. Pulse thermal control. By applying the reactive voltage with high frequency changes and adopting the FOC control strategy, the inductive characteristics of the motor winding are constantly used to generate AC current on the bus. The high internal resistance of the battery at low temperature is used to constantly generate Joule heat on the battery. While avoiding the risk of lithium analysis on the battery, the battery itself will generate heat, thus increasing the temperature of the battery. Finally, the real vehicle test is carried out to verify the correctness of the motor control design.</div></div>

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Kitazaki, Michiteru, i Akira Shimizu. "Visual-motor adaptation to stabilize perceptual world". W the 2005 international conference. New York, New York, USA: ACM Press, 2005. http://dx.doi.org/10.1145/1152399.1152416.

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Saito, Toshihiro. "Modal analysis of Structural Vibration for Electric-drive Motor built in Transmission". W FISITA World Congress 2021. FISITA, 2021. http://dx.doi.org/10.46720/f2020-mcf-019.

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"When a vehicle is cruising, unpleasant noise in the high-frequency band between 4 kHz and 5 kHz can occasionally be heard at the centers of front seats in the vehicle cabin. To search for the generation source of this noise, a study of the correlation between the cabin noise and airborne noise at the outer surface of the transmission, and an analysis of vibration transfer paths in the interior of the transmission were conducted. The results indicated that the source was the 0th-order breathing mode unique to electric-drive motors. For making it possible to predict this at the desk, vibrational analysis method for an electric-drive motor comprising laminated electrical steel sheets and segmented coils was proposed. Material property data for the electrical steel sheets and the coils was employed unmodified in the electric-drive motor vibrational analysis model. In addition, Laminate electrical steel sheets and the coils were modeled accurately. The analysis model defined the small sliding contact between the layers and also the contact between the electrical steel sheets and the coils taking into consideration. The contact stiffness between the electrical steel sheets and the coils was defined. First, the results of an eigenvalue analysis of the electrical steel sheets in isolation and of an experimental modal analysis were compared. The natural frequencies and eigenmodes in both sets of results corresponded well, with a difference of within 2%, up to 6 kHz. Next, vibrational analysis was conducted using an electric-drive motor model in which the coils were inserted into the laminated electrical steel sheets. the coil model used a rectangular cross-section, and defined equivalent material properties using a finite element analysis model in order to make it possible to accurately reproduce twist stiffness and bending stiffness. A comparison of the results of the analysis conducted using the electric-drive motor model and the experimental modal analysis using an electromagnetic shaker demonstrated the phenomenon of the peaks of natural frequencies exceeding 2 kHz becoming unclear. In addition, eigenmodes up to 5 kHz, in particular the 0th-order mode at 4.2 kHz, were accurately reproduced. Finally, this electric-drive motor was mounted into a transmission case and the modal analysis of structural vibration was conducted. Consequently, the tendency of the vibration level between the simulation and the measurement agreed well."

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Sauerhering, Joerg, Gunar Boye, Frank Beyrau, Sergey Perekopskiy i Olena Stamann. "Raising the Thermal Limits of an Electrical Motor Based on an Air Gap Winding by Applying Improved Laminated Layers and Optimized Cooling Duct Geometries". W FISITA World Congress 2021. FISITA, 2021. http://dx.doi.org/10.46720/f2020-adm-040.

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Due to their electro-mechanical behaviour, electrical motors are able to generate high power densities. For a 20 kg motor based on a modified air gap winding, a mechanical load of 80kW is theoretically possible. However, the achievable power density is generally limited by the thermal loads induced by Joule heating due to the Ohmic resistances in the motor's wiring. This paper discusses the potentials of cooling channel modifications, such as the overall geometry as well as surface variations, to enhance the convective heat transfer from the solid material in the coolant with focus on motors using an air gap winding. The convective heat transfer acts as a relevant thermal resistance, which becomes critical at elevated loads, because it is lies between the wiring, acting as a heat source, and the liquid coolant, acting as heat sink. The thermal resistance of the interface material between the wiring and the stator is in the same order of magnitude as the convective heat transfer. These non-metallic materials such as foils, coatings and glues for electrical insulation and mechanical bonding are highly limited in their temperature resistance. To evaluate the behaviour of modified cooling channels and investigate novel interface materials under motor-like conditions, experimental and numerical methods are employed to determine thermo-physical properties, heat and mass transfer and finally the temperature distributions. The experimental results are discussed in comparison with numerical and analytical models and validated thereby. Because of the limited possibilities for experimental investigations within a real electrical motor, a flat test bed, based on the boundary conditions of an existing 16" wheel hub motor was developed. The Ohmic heating was realised, applying a thin sheet foil of Inconel, so that specific heat loads up to 100 kW/mK could be realised. Here, the surface temperature could be measured contact-free at a high optical resolution, using infrared thermography. The most advantageous test bed feature is the optical accessibility of cooling channels which allows the visualisation of fluid flow regimes. As results, the influence of large-scale coolant duct geometry modifications on the motor temperatures and hydraulic characteristics as well as of small-scale modifications will be presented in comparison to non-modified geometries. Also, the outcomes and capabilities of novel thermal interface materials consisting of laminated foils will be discussed and an outlook on a modified motor design to increase the thermal limits will be given.

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Raporty organizacyjne na temat "Motor world"

Ni, Jiachun, Qiong Jiang, Gang Mao, Yi Yang, Qin Wei, Changcheng Hou, Xiangdong Yang, Wenbin Fan i Zengjin Cai. The effectiveness and safety of acupuncture for constipation associated with Parkinson’s disease: Protocol for a systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, luty 2022. http://dx.doi.org/10.37766/inplasy2022.2.0091.

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Review question / Objective: Is acupuncture a safe and effective therapy for constipation associated with Parkinson’s disease? Our aim is to assess the effectiveness and safety of acupuncture for constipation associated with PD and give guidance to future research direction. Condition being studied: Parkinson’s disease (PD) is a prevalent degenerative disease of nervous system characterized mainly by static tremor, bradykinesia, myotonia, postural gait disorders and other non-motor symptoms. According to variations on race, ethnicity, age and sex, the incidence of PD ranges from 8 to 20.5 per 100, 000 individuals annually. One global research shows that there were 6.1 million individuals suffer from PD in 2016 and will be 12 million patients around the world. According to several outcomes of case-control studies, the prevalence of constipation in PD varies from 28% to 61%. Constipation, as a common gastrointestinal disease which refers to the clinical presentation of reduced spontaneous complete bowel movement, dyschezia, feeling of incomplete defecation and outlet obstruction, is demonstrated to antedate the motor symptom and it's severity is related to the progression of PD. Acupuncture has been proved to act on the pathogenesis of constipation associated with PD. The proposed systematic review we're about to present is the first advanced evidence-based medical evidence in this area.

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Verdisco, Aimee, Jennelle Thompson i Santiago Cueto. Early Childhood Development: Wealth, the Nurturing Environment and Inequality First Results from the PRIDI Database. Inter-American Development Bank, lipiec 2016. http://dx.doi.org/10.18235/0011753.

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This paper presents findings from the Regional Project on Child Development Indicators, PRIDI for its acronym in Spanish. PRIDI created a new tool, the Engle Scale, for evaluating development in children aged 24 to 59 months in four domains: cognition, language and communication, socio-emotional and motor skills. It also captures and identifies factors associated with child development. The Engle Scale was applied in nationally representative samples in four Latin American countries: Costa Rica, Nicaragua, Paraguay and Peru. The results presented here are descriptive, but they offer new insight regarding the complexity of child development in Latin America. The basic message emerging from this study is that child development in Latin America is unequal. Inequality in results appears as early as 24 months and increases with age. There is variation in inequality. For example, correlations with the socio-economic characteristics of the home and maternal education are stronger for cognition, and language and communication than for motor development. The environment within which children develop and the adult-child interactions predominant within this environment ¿ referred to in this study as the nurturing environment - is important for all domains of child development utilized in this study, although stronger associations appear for cognition, language and communication, and socio-emotional development. For all domains measured by the Engle Scale, the nurturing environment bears a statistically stronger correlation than the socio-economic endowment of the home or maternal education. Gaps between the development of children in the top and low extremes in these factors matter. By 59 months, the development of a poor and under-nurtured child will lag by as much as 18 months behind her richer and more nurtured peers. For this child it will be more difficult to recognize basic shapes like triangles or squares, count to 20, or understand temporal sequences. She will also have gaps in her basic executive functioning and socio-emotional skills, including empathy and autonomy. She will not likely be ready for school and may not have success once there. Notably, however, if this same child, in the same poor household, were to benefit from a nurturing environment, her level of development would rise and would start to approach levels found in children in richer but less nurtured households. The nurturing environment thus appears to mitigate the negative association lower levels of wealth have with the domains of development included in this study.

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Agrawal, Asha Weinstein, Hannah King i H. A. "Burt" Tasaico. How Will California’s Electric Vehicle Policy Impact State-Generated Transportation Revenues? Projecting Scenarios through 2040. Mineta Transportation Institute, marzec 2024. http://dx.doi.org/10.31979/mti.2024.2312.

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California faces unprecedented uncertainty about how much revenue the state will raise from a package of taxes on motor fuels and annual registration fees on light-duty vehicles that was established in 2017 by Senate Bill 1 (SB 1). The SB 1 taxes are by far the largest source of revenue that the State of California generates to support maintenance, operations, and improvements for state highways, and the funds also contribute substantially to local transportation and public transit budgets. To help policymakers navigate the uncertainty about future SB 1 transportation revenue, this study used spreadsheet models to project revenue from the SB 1 taxes through 2040 under a set of eight scenarios that consider a wide range of possible futures. The scenarios consider changes to revenue that could arise from implementation of California’s zero-emission vehicle (ZEV) regulations, as well as potential changes in driving costs, population size, vehicle ownership rates, and trucking industry operations. Key findings include: • It is impossible to project future revenues with any confidence for more than a few years into the future. By 2040, annual revenue ranges from a low of $4.81 billion to a high of $12.15 billion. • The state may lose substantial revenue if the SB 1 taxes and fees are not changed and/or replaced within the coming few years. In 2027, just three years out, projected annual revenue for some scenarios drops by more than a billion dollars below 2024 revenue. • A fast ICE to ZEV transition would significantly reduce annual revenue—but so could changes in VMT. • Fuel taxes currently provide most SB 1 revenue, but by 2040 California may rely on vehicle registration fees to provide most of the revenue.

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CIE 245:2021 Optical Safety of Infrared Eye Trackers Applied for Extended Durations. International Commission on Illumination (CIE), 2021. http://dx.doi.org/10.25039/tr.245.2021.

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Infrared eye trackers are employed to achieve communication through gaze interaction, which is an important application of modern electro-optics and computer technology to the benefit of persons with disabilities who have major motor impairments, as well as for general use as a human-to-computer interaction device. By tracking eye movements of persons with severe motor disabilities, the individuals can interact with automated equipment through movements of their gaze. In addition to purely passive systems, which may only employ ambient lighting, more typical eye trackers employ active infrared eye-tracking techniques. However, questions have arisen with regard to the potential optical radiation hazards of using infrared eye trackers for the much-extended durations of 10 to 12 hours each day for a lifetime. Conventional eye trackers employed in the research setting would rarely be used for more than an hour. Several exposure guidelines exist today, but the question has arisen whether the chronic nature of exposure for such an infrared illuminator for assistive devices falls outside the assumed conditions of daily exposure. This technical report explores the basis of the current human exposure guidelines, their scientific basis and underlying assumptions in order to determine the direct applicability of these guidelines to this application. It is found that the most limiting exposure criterion is the infrared exposure limit to protect against delayed changes in the crystalline lens of the eye. The Technical Committee also examined some representative eye trackers and found that the day-long average exposure in these typical examples of current technology did not exceed that criterion.

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