ABSTRACT

�@The energy crisis is not a future topic any more especially in electric engineering field. Already the reclamation of new energy source and load equalization have become a hot issue and a lot of researches have been made. As one of its efforts, the DSG (Dispersed Storage and Generation) system has been under development for both the energy source and the converter part.
In order to supply the power of high quality, new power conversion technique is as important as the reclamation of new energy source. The conventional high-frequency converters using the hard-switching techniques not only make their switching losses large, but could be the origin generating the surge which perfectly shuts the lagging current generation. Hence, some type of quasi-resonant soft-switching PWM converters have been proposed which have remarkable advantages such as lowered switching losses, reduced EMI noise, simple control scheme and so on. However, most of them developed so far include some inherent problems which must be solved such as reduced power conversion efficiency due to significant circulating current generation. So this paper presents a novel high-frequency AC link DC-AC converter with secondary phase-shifted PWM-control for the purpose of solving the matter mentioned above and is manufactured and tested with remarkable results.

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