보조 스위치를 이용한 3상 ZCS 인버터에 관한 연구

A Study on the Three Phase Inverter using Auxiliary Switches

This paper proposes a soft-transition control strategy for a three phase ZCS(Zero Current Switching) inverter circuit. Each phase leg of inverter circuit consists of an LC resonant tank, two main switches, and two auxiliary switches. This paper presents design consideration via a study example of a three phase prototype inverter for motor drives. A simple device tester with zero current switching capability is proposed to select eligible auxiliary switches. The principle of operation, feature and design consideration is illustrated and verified through the experiment with a 2.2kW 5kHz IGBT based experimental circuit.