Comparisons of Two Kinds of Phase-shifted Controlled Full-bridge Mode Inverters with High Frequency Link

The novel full-bridge mode inverters with high frequency link are constituted of high frequency inverter bridge, high frequency transformer, cycloconverter, input and output filters. The converters have the full bridge-full wave and the full bridge-full bridge mode circuit topologies. The control strategy, principle characteristics, design criteria of the key circuit parameters and principle test of two kinds of phase-shifted controlled inverters are deeply and comparatively investigated in this paper, and important conclusions are obtained. Compared with the bi-polarity phase-shifted controlled inverters, the uni-polarity phase-shifted controlled inverters have better comprehensive performances, such as better spectrum characteristic of the voltage across output filter, less output filter, better waveforms of output voltage, ZVS of power switches, and so on. The phase-shifted controlled full-bridge mode inverters are valuable for engineering application in medium or large power inversion fields.