摘要
增大电动机的转矩密度、减小转矩脉动是提高伺服电动机性能的关键。分析了9槽10极、12槽10极、18槽10极及30槽10极几种常见永磁电动机的结构,利用傅里叶级数展开得到绕组磁势频谱图,在此基础上分析了不同结构电动机的绕组因数,并对反电势、电磁转矩和转矩脉动进行研究。除此之外,利用二维有限元法分析了电枢电流对电磁转矩和转矩脉动的影响,以及端部绕组对电动机电磁转矩、铜耗和永磁体损耗的影响。结果表明,18槽10极电动机能有效抑制电动机的转矩脉动,提高电动机的转矩密度。
The key to improving performance of the servo motor is to increase the torque density of the motor and reduce its torque pulses. By analyzing several common structures of permanent magnet motors involving 9-slot ＆ 10-pole, 12-slot ＆ 10-pole, 18-slot ＆ 10-pole and 30 slot ＆ 10- pole, and utilizing Fourier series expansion to obtain the spectrogram of winding magnetomotive force, the winding factors of different motor structures were analyzed while taking the study of the back EMF, electromagnetic torque and torque pulses. In addition, two-dimensional finite element method was used to analyze the impact of armature current to the electromagnetic torque and torque pulses, as well as the impact of the end windings to the motor electromagnetic torque, copper loss and the loss of permanent magnets. The results show that the 18 slot ＆ 10-pole motor can effectively inhibit the motor torque pulses and increase the motor torque density.
出处
《上海电气技术》
2016年第3期24-29,共6页
Journal of Shanghai Electric Technology
