中国电机工程学报2024，Vol.44Issue(6)：2437-2447,后插30,12.DOI:10.13334/j.0258-8013.pcsee.222845
转子温度空间分布差异诱发永磁电机局部失磁特性研究
Research on Local Demagnetization Characteristics of Permanent Magnet Motor Induced by Spatial Distribution Difference of Rotor Temperature
摘要
Abstract
The magnetic properties of permanent magnets are greatly affected by their operating temperature.Irreversible demagnetization at high operating temperature is the main bottleneck in high reliability design of permanent magnet motors.In order to solve the irreversible demagnetization problem of NdFeB permanent magnet for high power density permanent magnet motor with interior magnetic circuit structure,based on the difference of space loss and temperature distribution in the whole area of the motor,an analysis model and characteristic calculation method for local demagnetization of permanent magnet are proposed in this paper.The magnetic characteristic analysis model of permanent magnet material based on temperature,demagnetization and other variables is established by virtual block method of magnet.The spatial distribution characteristics of permanent magnet loss,temperature and local demagnetization of motor rotor are obtained by using the calculation method of bidirectional coupling of three-dimensional electromagnetic field and temperature field.Finally,the accuracy of analysis model and calculation method is verified by the test of permanent magnet temperature and magnetic field on rotor surface of a 115kW,8-pole permanent magnet motor prototype,which provides basis for the research of permanent magnet motor local demagnetization problem and fine demagnetization protection design.关键词
内置式永磁同步电机/双V型磁路结构/多物理场耦合/温度空间分布/局部失磁Key words
interior permanent magnet synchronous motor/double V type magnetic circuit structure/multi physical field coupling/spatial distribution of temperature/local demagnetization分类
信息技术与安全科学引用本文复制引用
崔刚,熊斌,李振国,黄康杰,阮琳,顾国彪..转子温度空间分布差异诱发永磁电机局部失磁特性研究[J].中国电机工程学报,2024,44(6):2437-2447,后插30,12.基金项目
国家自然科学基金项目(52177064,U2141223).Project Supported by National Natural Science Foundation of China(52177064,U2141223). （52177064,U2141223）
