A Novel PWM Technique With Two-Phase Modulation

In this paper, a new two-phase pulse width modulation (PWM) technique is proposed, in which the reference voltage is constructed by three space vectors. At any speed, the peak-to-peak value of the common-mode voltage (CMV) in one PWM cycle can be reduced to one third of the DC bus voltage, even despite of the dead-time effect. And in the low voltage region, not only the CMV but also the current ripple is restrained effectively. In the entire voltage range, the linear modulation region is not limited and the switching loss is reduced because of fewer switching actions. The validity of the proposed technique is verified through simulation and experimental results.