Abstract

The authors present two circuit topologies for constant-frequency phase-shifted pulse-width-modulated (PWM) resonant full-bridge inverter-type DC-DC high-power converters with a single high-frequency high-voltage (HFHV) transformer AC link, which effectively make the best of parasitic circuit components existing in the HFHV transformer and HV cable. Two resonant circuit topologies are introduced which are concerned with series and parallel-loaded resonant (SPR) tank type and multiresonant (MR) type composed of SPR tank and two zero voltage switched (ZVS) quasi-resonant poles. These converter characteristics are evaluated in terms of computer-aided analytical and experimental results. Real-time direct digital signal processing based model control strategies for two resonant converters treated here have been implemented to improve transient and steady-state operating performance for an X-ray high-power generator in industrial and medical applications. >

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