Quantitative Analysis on Maximum Efficiency Point and Specific High-Efficiency Region of Permanent-Magnet Machines

2021 ◽  
pp. 1-1
Author(s):  
Junqiang Zheng ◽  
Wenxiang Zhao ◽  
Jinghua Ji ◽  
Christopher H. T. Lee
Keyword(s):  
Quantitative Analysis ◽  
Permanent Magnet ◽  
High Efficiency ◽  
Maximum Efficiency ◽  
Permanent Magnet Machines

scholarly journals Optimal Velocity Control for a Battery Electric Vehicle Driven by Permanent Magnet Synchronous Motors

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Dongbin Lu ◽  
Minggao Ouyang ◽  
Jing Gu ◽  
Jianqiu Li
Keyword(s):  
Permanent Magnet ◽  
Electric Vehicle ◽  
Information Technologies ◽  
High Efficiency ◽  
Permanent Magnet Synchronous Motor ◽  
Minimum Energy ◽  
Maximum Efficiency ◽  
Optimal Velocity ◽  
Minimum Energy Consumption ◽  
Economic Operation

The permanent magnet synchronous motor (PMSM) has high efficiency and high torque density. Field oriented control (FOC) is usually used in the motor to achieve maximum efficiency control. In the electric vehicle (EV) application, the PMSM efficiency model, combined with the EV and road load system model, is used to study the optimal energy-saving control strategy, which is significant for the economic operation of EVs. With the help of GPS, IMU, and other information technologies, the road conditions can be measured in advance. Based on this information, the optimal velocity of the EV driven by PMSM can be obtained through the analytical algorithm according to the efficiency model of PMSM and the vehicle dynamic model in simple road conditions. In complex road conditions, considering the dynamic characteristics, the economic operating velocity trajectory of the EV can be obtained through the dynamic programming (DP) algorithm. Simulation and experimental results show that the minimum energy consumption and global energy optimization can be achieved when the EV operates in the economic operation area.

Losses in High Speed Permanent Magnet Machines Used in Microturbine Applications

2008 ◽  
Vol 131 (2) ◽  
Author(s):  
Co Huynh ◽  
Liping Zheng ◽  
Dipjyoti Acharya
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
High Efficiency ◽  
Permanent Magnet Machines ◽  
Verification Methods

High speed permanent magnet (PM) machines are used in microturbine applications due to their compactness, robust construction, and high efficiency characteristics. These machines are integrated with the turbines and rotate at the same speeds. This paper discusses in detail the losses in high speed PM machines. A typical PM machine designed for microturbine application is presented with its detailed loss calculations. Various loss verification methods are also discussed.

scholarly journals The Comparative Analysis of the Performances of Four and Six Pole Pairs Permanent Magnet Synchronous Generator

2019 ◽  
Vol 38 (1) ◽  
pp. 1-14
Author(s):  
R.A. Msuya ◽  
R.R.M. Kainkwa ◽  
M.I Mgwatu
Keyword(s):  
Permanent Magnet ◽  
High Efficiency ◽  
Harmonic Distortion ◽  
Synchronous Generator ◽  
Permanent Magnet Machines ◽  
Climate Conditions ◽  
Low Speed ◽  
Low Wind Speed ◽  
Turbine Generators ◽  
Wind Turbine Generators

Wind power applications using multi-poles permanent magnet generators have become very attractive especially in small ratings. Low-speed multi-pole PM generators are maintenance-free and may be used in different climate conditions. Most of the low speed wind turbine generators presented is permanent magnet machines, which have advantages of high efficiency and reliability since there is no need of external excitation and conductor losses are removed from the rotor. From the study two types of PM AC generator are designed with 6 pole pairs and the other one with 4 pole pairs. These generators were designed and analysed using Maxwell software. The results were compared for the best performance determination. The 6 poles generator was found to have good power output with less Total Harmonic Distortion (THD) and high efficiency of over 92% that could be achieved at low wind speed of 2 m/s.

Losses in High-Speed Permanent Magnet Machines Used in Microturbine Applications

2008 ◽  
Author(s):  
Co Huynh ◽  
Liping Zheng ◽  
Dipjyoti Acharya
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
High Efficiency ◽  
Permanent Magnet Machines ◽  
Verification Methods

High speed permanent magnet (PM) machines are used in microturbine applications due to their compactness, robust construction and high efficiency characteristics. These machines are integrated with the turbines and rotate at same speeds. This paper discusses in details losses in high speed PM machines. A typical PM machine designed for microturbine application is presented with its detailed loss calculations. Various loss verification methods are also discussed.

scholarly journals Analysis and Design of Innovative Magnetic Wedges for High Efficiency Permanent Magnet Synchronous Machines

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 255
Author(s):  
Lucia Frosini ◽  
Marco Pastura
Keyword(s):  
Permanent Magnet ◽  
Motor Performance ◽  
High Efficiency ◽  
Analytical Calculation ◽  
Synchronous Machines ◽  
Permanent Magnet Machines ◽  
Power Losses ◽  
Permanent Magnet Synchronous Machines ◽  
Analysis And Design ◽  
Fractional Slot Concentrated Winding

The global decarbonization targets require increasingly higher levels of efficiency from the designers of electrical machines. In this context, the opportunity to employ magnetic or semi-magnetic wedges in surface-mounted permanent magnet machines with fractional-slot concentrated winding has been evaluated in this paper, with the aim to reduce the power losses, especially in the magnets. Since an analytical calculation is not sufficient for this evaluation, finite element methods with two different software have been employed, by using a model experimentally validated on a real motor. The effects of wedges with different values of permeability and different magnetization characteristics have been evaluated on flux density, back electromotive force, and inductances, in order to choose the more suitable wedge for the considered motor. Furthermore, a new wedge consisting of different portions of materials with different magnetic permeability values is proposed. The effects of both conventional and unconventional magnetic wedges were assessed to optimize the motor performance in all working conditions.

scholarly journals Permanent Magnet Machines for High-Speed Applications

2022 ◽  
Vol 13 (1) ◽  
pp. 18
Author(s):  
Tianran He ◽  
Ziqiang Zhu ◽  
Fred Eastham ◽  
Yu Wang ◽  
Hong Bin ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
High Performance ◽  
Single Phase ◽  
High Efficiency ◽  
Permanent Magnet Machines ◽  
Advantages And Disadvantages ◽  
Three Phase ◽  
Parasitic Effects ◽  
Rotor Dynamic

This paper overviews high-speed permanent magnet (HSPM) machines, accounting for stator structures, winding configurations, rotor constructions, and parasitic effects. Firstly, single-phase and three-phase PM machines are introduced for high-speed applications. Secondly, for three-phase HSPM machines, applications, advantages, and disadvantages of slotted/slotless stator structures, non-overlapping/overlapping winding configurations, different rotor constructions, i.e., interior PM (IPM), surface-mounted PM (SPM), and solid PM, are summarised in detail. Thirdly, parasitic effects due to high-speed operation are presented, including various loss components, rotor dynamic and vibration, and thermal aspects. Overall, three-phase PM machines have no self-starting issues, and exhibit high power density, high efficiency, high critical speed, together with low vibration and noise, which make them a preferred choice for high-performance, high-speed applications.

Regulation of High-Efficiency Region in Permanent Magnet Machines According to a Given Driving Cycle

2017 ◽  
Vol 53 (11) ◽  
pp. 1-5
Author(s):  
Qian Chen ◽  
Xun Fan ◽  
Guohai Liu ◽  
Liang Xu ◽  
Meimei Xu
Keyword(s):  
Permanent Magnet ◽  
High Efficiency ◽  
Driving Cycle ◽  
Permanent Magnet Machines

Improved Model Based Predictive Torque Control Strategy with Fast Dynamic Response for Flux-Switching Permanent Magnet Machines

2013 ◽  
Vol 416-417 ◽  
pp. 704-710 ◽  
Author(s):  
Wei Xu ◽  
Wen Wu Yang
Keyword(s):  
Dynamic Response ◽  
Permanent Magnet ◽  
High Efficiency ◽  
Torque Control ◽  
Thermal Dissipation ◽  
Switching Frequency ◽  
Permanent Magnet Machines ◽  
Model Based ◽  
Torque Control Strategy ◽  
Improved Model

The flux-switching permanent magnet machine (FSPMM) has got great attention by academic researchers during the past couple of years for its merits of strong mechanical robustness, high efficiency, strong thermal dissipation ability, etc. However, for its inherited double salient structure in both stator and rotor, the FSPMM suffers from severe torque and flux ripples at different rotor positions for its variable magnetic resistance, which cannot be solved completely only by electromagnetic optimal design. In order to increase the drive performance of FSPMM, such as dynamic response and stable torque smoothness, an improved model based predictive torque control (MPTC) algorithm is proposed. By using the cost function modulation strategy, the torque and flux ripples of FSPMM are reduced evidently, accompanying with the minimized converter switching frequency and power loss. Comprehensive simulation investigations are finally carried out to validate relevant theoretical analysis.

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