Affiliation of Author(s):自动化学院
Journal:Zhongguo Dianji Gongcheng Xuebao
Abstract:Attaching high conductive copper layer between the sleeve and permanent magnets can reduce the eddy-current loss caused by asynchronous time and space field harmonics in the rotor of high-speed permanent magnet brushless direct-current (PM BLDC) motors. In this paper, the effect of copper shields with different thicknesses on reducing rotor eddy-current loss was verified, and then the stress calculation procedure for the rotor with multi-layer rings including copper shield were established. A method for calculating the presetting interference fittings of the interfaces was proposed. All the calculations take into account the influences of presetting interference fittings, centrifugal force and temperature rise. On this basis, the influences of copper shield thickness on the maximum stress of each part of the rotor were analyzed. The validity of the analytical method was verified by simulation using finite element method and prototype test. © 2018 Chin. Soc. for Elec. Eng.
ISSN No.:0258-8013
Translation or Not:no
Date of Publication:2018-04-20
Co-author:张忠明,孙权贵,许治宇,李克翔
Correspondence Author:张忠明,邓智泉,deng zhiquan
Date of Publication:2018-04-20