A WBG Based Active Reflected Wave Canceller for SiC Motor Drives

The high dv/dt associated with Wide-Bandgap (WBG) devices will lead to more serious reflected wave phenomenon, resulting in overvoltage at the load side. This paper proposes an active reflected wave canceller (ARWC) for SiC motor drives. The proposed solution mitigates the reflected wave phenomenon by injecting a controlled nanoseconds voltage pulse. The proposed ARWC can achieve smaller size and light weight utilizing WBG devices. A testbed has been built to experimentally demonstrate the operation principle of the proposed ARWC circuit.