Simple high performance three-phase boost rectifiers

Important advantages of using a DC rail diode in the three-phase PWM boost rectifier are recognized, including reduced diode reverse recovery and high reliability, as well as guaranteed six-step operation. Several simple soft-switched three-phase boost rectifiers were developed based on using the DC rail diode, further improving the converter performance by minimizing the switching losses. All these advantages can be achieved with three simple independent analog controllers. Consequently, these new rectifiers can run at much higher switching frequencies, and achieve higher efficiency and higher power density with lower cost and higher reliability than the conventional one