scholarly journals Analytical Model of Air-Gap Field in Hybrid Excitation and Interior Permanent Magnet Machine for Electric Logistics Vehicles

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 148237-148249
Author(s):  
Wenjing Hu ◽  
Xueyi Zhang ◽  
Yulong Lei ◽  
Qinjun Du ◽  
Liwei Shi ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Analytical Model ◽  
Air Gap ◽  
Permanent Magnet Machine ◽  
Hybrid Excitation ◽  
Interior Permanent Magnet

Modeling and analyzing of magnetic field in unequal segmented Halbach array permanent magnet machine

2020 ◽  
pp. 1-21
Author(s):  
Liyan Guo ◽  
Huimin Wang ◽  
Xin Gu ◽  
Tingna Shi ◽  
Changliang Xia
Keyword(s):  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Model ◽  
Air Gap ◽  
Permanent Magnet Machine ◽  
Halbach Array ◽  
Pair Number ◽  
Calculation Results ◽  
Flux Density Distribution ◽  
Gap Width

Permanent magnet machine adopting Halbach array has more sinusoidal air-gap flux density distribution and higher air-gap flux density magnitude. Compared with the equal segmented Halbach array, the fundamental magnitude of air gap flux density can be higher and distortion rate can be lower by reasonably designing each segment width in unequal segmented Halbach array. Thus, in this paper, the permanent magnet machine adopting unequal segmented Halbach array is researched. Firstly, an analytical model is established for PM machine adopting Halbach array to improve the calculation efficiency. This analytical model can be applied to the Halbach array having arbitrary pole pair number, arbitrary number of segments per pole, arbitrary segment width and arbitrary gap width between segments. Further, the calculation results for air gap flux density between analytical model and finite element method are compared to verify the analytical model. In addition, the method to determine each segment width in the unequal segmented Halbach array is proposed firstly in this paper. On this basis, effects of the gap width between segments and each segment width under one pole on air gap flux density are researched. The research conclusions will provide guidance for the design and fabrication of unequal segmented Halbach array.

A Novel Asymmetric Interior Permanent Magnet Machine for Electric Vehicles

2021 ◽  
pp. 1-1
Author(s):  
Yang Xiao ◽  
Z.Q. Zhu ◽  
Shensheng Wang ◽  
Geraint Jewell ◽  
Jin Tao Chen ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Electric Vehicles ◽  
Permanent Magnet Machine ◽  
Interior Permanent Magnet

Modeling and simulation analysis of the hybrid excitation synchronous machine system utilizing tooth harmonic for excitation

2016 ◽  
Vol 35 (2) ◽  
pp. 540-555 ◽  
Author(s):  
Yonghong Xia ◽  
Junbo Liu ◽  
Bo Xu ◽  
Hongjian Wu
Keyword(s):  
Permanent Magnet ◽  
Operation Mode ◽  
Structural Features ◽  
Current Waveform ◽  
Standard State ◽  
State Equations ◽  
Permanent Magnet Machine ◽  
Content Type ◽  
Machine System ◽  
Hybrid Excitation

Purpose – The purpose of this paper is to propose a novel hybrid excitation permanent magnet synchronous generator (HEPMSG) utilizing tooth harmonic for excitation, the structural features and operation principle of which are also described. Design/methodology/approach – To obtain the operation performance quickly, this paper derives the mathematical model of the machine system represented by circuit, and analyzes the operation mode of rectifier circuit in the tooth harmonic excitation system, then the standard state equations for each operation mode are obtained. Combining the inductance parameter of this machine with the load resistance and inductance, the armature current waveform, the field current waveform and tooth harmonic winding current waveform are obtained by using the numerical method to solve the standard state equation. Findings – Comparing with the experimental results, the availability of the principle and the validity of the model of the machine system are verified. Practical implications – This HEPMSG is a new brushless self-excited and self-regulated generator, which is suitable for an independent power source. Originality/value – Unlike the existing hybrid excitation permanent magnet machine, this HEPMSG utilized the inherent tooth harmonic EMF of the rotor to adjust the air-gap magnetic field of the permanent magnet machine.

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