The Compensation Method of the Modulation-delay for the Voltage type Dual PWM Converter and Composition of the Instantaneous Current Controller

전압형 Dual PWM 컨버터의 변조각 지연에 따른 보상법 및 순시전류 제어기 구성

In this paper, a voltage type dual PWM converter which achives the bidirectional power flow between a AC supply and a DC bus voltage is described. In PWM modulator, there exist a time difference between the sampling time and carrier wave, it achieves stable modulation even the disturbance in the synchronous AC source voltage. And this paper proposes the compensation method and the control method related a disturbance of synchronous signal using the low pass filter and phase shifter for the stable modulation. As a result the voltage type dual PWM converter makes the imput current wave as sinusoid, and performs the high power factor driving.