Zero Voltage Soft-Commutation PWM DC–DC Converter with Saturable Reactor Switch-Cascaded Diode Rectifier
نویسندگان
چکیده
An improved single-ended push–pull (SEPP) halfbridge type zero-voltage soft-switching pulse width modulation (ZVS-PWM) DC–DC power converter is presented in this paper, which makes use of a saturable reactor-assisted lossless capacitor type zero voltage soft-switching method. The SEPP power converter with a high-frequency forward and flyback hybrid transformer link has some advantages such as lowered switching and conduction losses, soft-switching transition operation over a wide load range, constant frequency PWM regulation and minimized Electro Magnetic Interference (EMI) as well as Radio Frequency Interference (RFI) noises. Its operating principle is illustrated and its periodic steady-state circuit analysis are implemented. In order to demonstrate the remarkable effectiveness of this converter characteristics, feasible experiments are actually implemented with a 150-W–200-kHz prototype of high-frequency link ZVS-PWM DC–DC converter using power MOSFET’s with ultrafast soft-recovery diode.
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