Study on the Airgap Flux Density of the Six-Phase Induction Machine Based on Trapezoidal Phase Current Waveform with CAD

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 separated into the field winding and the torque winding. The function which is about the field and torque control in directed and separated mode can be realized without the complex Park transformation. The airgap field density of the six-phase induction motor using trapezoidal wave phase current is investigated in this paper. Three method are used to verify the airgap flux density of the motor namely conventional theoretical calculation, Finite Element calculation and practical measurements. The value of K is calculated of the MMF balanced constant. The result of the airgap flux density obtained from these methods show good agreement. The simulation of DC motor control is realized really.