异频供电永磁推进电动机矢量控制的数学模型与仿真

Model and simulations of dissimilar frequency power supplied permanent magnet propulsion motor based on vector control

针对一种有2套以上不同极对数定转子的特殊结构高功率密度永磁推进电动机,提出了一种新型的矢量控制方法。介绍这种电动机的结构,以2套极对数不同的定转子结构为例,建立了相应的永磁同步电机数学模型,介绍通过不同频率的电源对其供电实现矢量控制的原理,分析2套定、转子q轴电流给定值的分配和实现最大转矩/电流控制的方法,给出了整个控制系统结构框图。仿真结果表明,所提出的异频供电永磁推进电动机数学模型及矢量控制方法在理论上是可行的,其控制效果良好,2套极对数不同的定转子模块同时出力,起到了提高功率密度的作用。

A vector control was developed for high power density permanent magnet （PM） propulsion motors with two stator-rotor sets with different numbers of poles. In the control frame, the two stator current vectors are separately controlled in closed loops with dissimilar frequency power supplies as the shunt structure in the vector controls for two normal motors, each according to the maximum torque per ampere. Simulations show that the control method is effective with the two stator-rotor sets operating together to improve the power density.