전압원 인버터 Leg에 대한 출력 전압 극성 검출식 베이스/게이트 구동 억제 방법

Output Voltage Polarity Detection type Base/Gate Drive Suppression Method for Voltage Source Inverter Legs

The base/gate drive suppression method proposed by Joshi and Bose is that which detects the output current polarity of the leg and, according to the polarity, suppresses the base/gate drive of one of the ore switching devices of the leg. This method has the merit that it does not have the conventional dead time problem, reduces the power loss of the driving circuit and others. But this method has difficulty in implementation. In this paper, a new base/gate drive suppression method by detecting not the output current polarity but the output voltage polarity is proposed. The proposed method is easier to implement than Joshi and Bose's method.