Electromagnetic Performance Prediction of a Double-Rotor Flux-Switching Motor Based on General Air-Gap Equivalent Algorithms Model

2019 ◽  
Author(s):  
Jiqi Wu ◽  
Xiaoyong Zhu ◽  
Zixuan Xiang ◽  
Lei Xu ◽  
Min Jiang ◽  
...  
Keyword(s):  
Performance Prediction ◽  
Air Gap ◽  
Rotor Flux ◽  
Electromagnetic Performance ◽  
Flux Switching Motor

Design of Hybrid Excitation Flux Switching Motor Based on Air-Gap Field Modulation

2021 ◽  
Author(s):  
Wang Jiabing ◽  
Li Hongmei ◽  
Zhou Yanan ◽  
Wang Jinyu ◽  
Liu Liwen ◽  
...  
Keyword(s):  
Air Gap ◽  
Hybrid Excitation ◽  
Field Modulation ◽  
Flux Switching Motor

Torque ripple optimization for synchronous reluctance motors based on a virtual permanent magnet harmonic machine model

2021 ◽  
Vol 67 (3) ◽  
pp. 327-338
Author(s):  
Yixiang Xu ◽  
Chong Di ◽  
Xiaohua Bao ◽  
Dongying Xu
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Torque Ripple ◽  
Air Gap ◽  
Analysis Model ◽  
Machine Model ◽  
Asymmetric Rotor ◽  
Rotor Flux ◽  
Air Gap Magnetic Field ◽  
Intermediate Variables

The torque ripple is affected by both the stator and the rotor magnetic field harmonics. In synchronous reluctance motors (SynRM), there are only rotor permeance harmonics existing on the rotor side for the absence of the rotor windings. Since the asymmetric rotor flux barriers are widely applied in the SynRM rotor, it is difficult to calculate the rotor permeance accurately by the analytical method. In this article, the effects of the rotor permeance harmonics on the air-gap magnetic field are studied by a virtual permanent magnet harmonic machine (VPMHM), which is a finite-element (FE) based magnetostatic analysis model. The air-gap flux density harmonics produced by the SynRM rotor are extracted from the VPMHM model and used as the intermediate variables for the torque ripple optimization. The proposed method does not need to solve the transient process of motor motion. Hence, the time of the optimization process can be significantly shortened. Finally, a full electric cycle is simulated by dynamic FE simulation, and the torque ripple is proved to be effectively reduced.

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