This paper presents a novel circuit topology of the voltage source type zero voltage soft-switching (ZVS) full bridge DC–DC power converter with an isolated high-frequency transformer, which incorporates zero-current soft-switching (ZCS) phase-shifted (PS)–PWM active power switches in series with diodes of two bridge arms of a full-bridge rectifier on the high-frequency transformer secondary side. This high-frequency linked DC–DC power converter can achieve ZVS for noncontrolled active power switches on the primary side of the transformer and ZCS for PS–PWM active switches on the secondary side of the transformer under wide load variations as well as a wide PS–PWM regulation range. The switching power losses and conduction power losses of the active devices of the proposed DC–DC converter can be considerably reduced. The proposed DC–DC converter blocks circulating current flowing through the semiconductor switching devices on the transformer primary side as compared to the lossless snubbing capacitor and transformer leakage and magnetising inductor-assisted soft-switching full-bridge DC–DC converter with ZVS PS–PWM scheme on the transformer primary side. The steady-state operating principles of the proposed DC–DC converter are evaluated and discussed, based on the simulation and experimental results obtained from a 2 kW–40 kHz breadboard set-up using IGBTs.
No takes yet. Share an insight, caveat, or question.
Moisseev et al. (2004) studied this question.