Experimental Study on Characteristics Variation of Permanent Magnets for High-speed Machine Applications  

作　　者：Yunchong Wang Hongxia Cao Ilhami Colak Youhao Zhang Jianxin Shen 

机构地区：[1]College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China [2]Zhejiang Provincial Key Laboratory of Electrical Machine Systems,Hangzhou 310027,China [3]Department of Electrical and Electronics Engineering,Nisantasi University,Istanbul 34000,Turkey

出　　处：《Chinese Journal of Electrical Engineering》2022年第1期16-23,共8页中国电气工程学报（英文）

基　　金：Supported by the National Natural Science Foundation of China(51837010,52007161);Zhejiang Provincial Natural Science Foundation(LQ20E070005);Key R&D Program of Zhejiang Province(2019C01044).

摘　　要：High-speed permanent magnet(PM)electric machines are widely used.However,their extreme operating conditions,e.g.,high temperature and high mechanical stress,lead to variations of the PM characteristics and affect the machine performance.In the present study,an experimental device is designed to test the PM characteristics by simulating the stress and temperature conditions of high-speed machines.The experimental results indicate that the PM remanence not only varies at high temperatures,which is well known,but also changes under high mechanical stress.It is shown that the PM remanence increases with the mechanical stress but decreases with the temperature rise.Accordingly,a new demagnetization-curve model of the magnets under multiple stresses is refined to better express the PM characteristics.The performance of a high-speed PM machine is then analyzed as an example to indicate the necessity of the model refinement.The effects of the temperature and mechanical stress on the conductivity of the PMs are also examined.The experimental results indicate that the conductivity of the PM increases with the temperature and pressure.

关 键 词：High-speed machine permanent magnet mechanical stress remanence variation demagnetization-curve model 

分 类 号：TM351[电气工程—电机]