Research on the Torque and Back EMF Performance of a High Speed PMSM Used for Flywheel Energy Storage

Energies

Jing Zhao²  Zhongxin Gu¹  Bin Li²  Xiangdong Liu²  Xiaobei Li²  Zhen Chen² 

[1] School of Automation, Beijing Institute of Technology, Beijing 100081, China;

关键词: flywheel energy storage (FES);    high speed;    permanent-magnet synchronous machine (PMSM);    torque ripple;    Taguchi method;    back electromotive force (EMF);    cogging torque;   

DOI  :  10.3390/en8042867

来源: mdpi

【 摘 要 】

Due to advantages such as high energy density, high power density, rapid charge and discharge, high cyclic-life, and environmentally friendly, flywheel energy storage systems (FESs) are widely used in various fields. However, the performance of FES systems depends on the performance of a high speed machine, therefore, the design and optimization of a high efficiency and high power density machine are very crucial to improve the performance of the whole FES system. In this paper, a high speed permanent-magnet synchronous machine (PMSM) is researched. Considering the requirement of low torque ripple in low speed and loss caused by back electromotive force (EMF) harmonics, the electromagnetic performance is improved from points of view of slot/pole matching, magnetic-pole embrace with the finite element method (FEM). Furthermore, the magnetic-pole eccentricity, the slot opening, the thickness of PM and air-gap length are also optimized with Taguchi method. The electromagnetic performance, such as torque ripple, cogging torque, average torque and back EMF wave are much improved after optimization. Finally, experiments are carried out to verify the calculated results.

【 授权许可】

CC BY   
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