Proposal of an isolated current controlled inverter

摘要

A combination of a two transistor forward converter (input) and a conventional full-bridge inverter (output) with current control loop is proposed, resulting in an isolated inverter. The forward converter operates in high frequency switching through a fixed frequency hysteresis controller, making the load current modulation. Due to the forward current modulation, the full-bridge inverter switches in ZVS mode at turning on, and operates with low switching frequency (load operation frequency). This way, IGBTs can be used, allowing a high voltage output.