| Abstract |
In this paper, the normally-on type bidirectional switch, in which is comprised of normally-on and normally-off switching devices is proposed for one of a protection method of the Matrix Converter (MC). A diode clamp circuit or auxiliary protection circuits have to keep inductive load current loop in a MC utilized a bidirectional switch when the MC becomes gate block situation under abnormal conditions. We focus that the normally-on type switching devices like SiC-JFET and GaN HFET becomes turn-on state, when zero gate bias voltage. These characteristic of normally-on type is used to replace diode clamp circuit in MC driver system. In this research, the experimentation based on indirect MC for Induction Motor (IM) driver system was carried out. The experimental result of IM driver shows that the proposed bidirectional switch can overcome a generated inductive load current. Under a variety of operation conditions of voltage, frequency, and load torque, the proposed method is investigated and evaluated. |
