梯形波相电流驱动下六相感应电机转矩研究

Research on Electromagnetic Torque of Six-phase Induction Machine Based on Trapezoidal Phase Current Waveform

针对多相电机控制模式复杂性的特点,本文提出一种新颖的控制方式:六相感应电机梯形波相电流控制。该梯形波相电流由励磁电流和转矩电流组成,在该梯形波相电流驱动下六相定子绕组可以分为励磁绕组和转矩绕组,模拟直流电机实现励磁磁场和转矩的直接控制而不需要复杂的派克变换。本文主要通过理论分析计算、有限元分析和实验测量数据来研究梯形波相电流驱动下六相感应电机输出转矩性能,并对磁势解耦时的参数k进行了理论分析和计算。输出转矩的理论分析、有限元分析和实验结果是一致的,表明了分析模型的正确性以及该控制策略可以从真正意义上模拟直流电机的转矩输出性能。

A novel control method is proposed in this paper, namely six-phase motor trapezoidal wave phase current control. By using the trapezoidal phase current waveform, the stator winding is divided into the field winding and the torque winding. Direct field and torque control can be realized without the complex Park transformation. The performance of the output torque of the sixphase induction motor using trapezoidal wave phase current is investigated in this paper. Three method are used to verify the torque of the motor namely conventional analytical calculation, Finite Element calculation and practical measurements. Analytical calculation of k-value at MMF decoupling is per-formed. The results of the torque output obtained from these methods show good agreement, which indicates that not only the machine control model is right but also the de motor＇s electromagnitic torque performance can be realized.