Comparisons of two kinds of AC/AC converters with high frequency link

Novel AC/AC converters with high frequency ac link are composed of two kinds of AC/AC converters, which are voltage mode based on Forward converter and current mode based on Flyback converter. The circuit configuration and topology, control strategy, principle characteristics, design criteria of the key circuit parameters, and principle prototype of two-kinds converters are deeply and comparatively investigated firstly in this paper, and important conclusions are obtained. Compared with the voltage mode converters, the current mode converters have the characteristics such as more concise circuit topologies, wider range of the input voltage, higher quality of the output waveforms, higher reliability, lower cost, lower conversion efficiency and more applicability to the small power conversion fields. Research on the comparisons of two kinds of converters supplies the key technical foundation on new type electronic transformers, regulated sinusoidal ac power supplies, and ac regulators.