A control method to reduce a surge voltage of indirect matrix converter by using zero current and zero voltage switching

This paper proposes a method to decrease the surge voltage for indirect matrix converter (IMC) by implementing a control method which combines the zero current (ZCS) and the zero voltage switching (ZVS). In the high power applications, the wiring in the DC link parts of the converter contains of a large parasitic inductance. Then a large surge voltage is appearing as a problem at the inverter stage. In the proposed method, the standard value of the surge voltage in the inverter stage becomes zero by enable the zero vector mode of the current source rectifier. Therefore, the peak value of the surge voltage can be decreased. The basic operation and validation of the proposed method are confirmed experimentally. As a result, the surge voltage at a generation of a zero vector could be decreased by approximately 30 % from 450 V to 312 V. By applying the proposed method, a high power converter can use a smaller size snubber circuit and at the same time achieves high reliability.