高速电机系统电感对电磁损耗抑制效果的敏感度分析

Sensitivity Analysis of Suppression Effect of HSPMSM System Inductance on Electromagnetic Loss

高速永磁同步电机由于电磁气隙大、匝数少,自身的电枢电感较小,无法对电流时间谐波造成的电磁损耗进行有效抑制,通常需要串联电抗器运行。首先,采用解析法结合电机结构特点计算了电机的电枢电感;然后基于场路耦合仿真,分析串联电抗器增大系统电感的情况下,系统电感对电机电磁损耗抑制效果的敏感度。分析结果表明,转子涡流损耗对系统电感的变化最敏感,铜耗次之,铁耗最不敏感,当系统电感增大到一定值时,3种电磁损耗都不再随着系统电感的增加明显变化。通过实验验证了仿真结果的可靠性,为类似电机的设计和运行提供了参考。

Due to the large air gap and small number of turns in a high-speed permanent magnet synchronous motor(HSPMSM),the armature inductance of the motor itself cannot effectively suppress the electromagnetic loss caused by current time harmonic,thus it needs to be operated in series with a reactor.In this paper,the armature inductance of the motor is calculated by the analytical method combined with its structural characteristics.Based on field-path coupled simulations,the sensitivity of the suppression effect of system inductance on the electromagnetic loss of the motor is analyzed when the system inductance is increased by the external series reactor.The analysis results shows that the sensitivity of the eddy current loss in rotor with respect to system inductance is most obvious,the copper loss is the second,and the iron loss is the least.When the system inductance increases to a certain value,the three types of electromagnetic loss will not change significantly with the increase in system inductance.The reliability of simulation results was verified by experiments,providing reference for the design and operation of similar motors.