摘要
以脉宽调制电压型逆变器供电的永磁直线同步电动机(PMLSM)为求解对象,用分离变量法求解电动机的电流解析表达式,在此基础上分析了电动机的谐波磁场特性及逆变器供电电源产生的推力谐波分量。分析表明,电源的非正弦畸变引起电动机磁场畸变并使电动机推力产生波动。解析结果与有限元方法结果有较好吻合。
In this paper, harmonic characteristics of the permanent magnet linear synchronous motor （PMLSM） fed by pulse width modulation （PWM） voltage source inverter are discussed. The analytical expression of harmonic currents is presented using variable separation method. Harmonic field characteris- tic and components of the thrust are also studied. The analysis shows that the non-sinusoidal power from the inverter causes thrust ripple and pulsation in motor. The results are verified by comparison of FEM.
出处
《微电机》
北大核心
2007年第7期10-12,共3页
Micromotors
基金
国家自然科学基金项目(60474043)
河南省杰出青年科学基金项目(04120002200)
关键词
永磁直线同步电动机
PWM逆变器
谐波磁场
推力
Permanent magnet linear synchronous motor
PWM inverter
Harmonic field
Thrust
