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This paper proposes a zero-voltage and zero-current-switching three-level (ZVZCS TL) DC-DC converter using passive clamping circuit to reduce switching loss, improve current trails of IGBT and improve the converter efficiency. The proposed TL converter can achieve effective zero-voltage switching (ZVS) for the TL leg and zero-current switching (ZCS) for the two-level leg. By using the passive clamping...
Based on the characteristics of conventional full-bridge phase-shift PWM ZVS (zero-voltage-switching) DC-DC converter, a novel full-bridge phase-shift PWM ZVS DC-DC converter using non-dissipative snubber circuit is proposed. The converter can achieve ZVS for all switches effectively. The principle and operation modes of the converter are analyzed in detail, and the necessary condition of soft switching...
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