Title :
Zero voltage soft-commutation PWM DC-DC converter with saturable reactor switch-cascaded diode rectifier
Author :
Sun, Junming ; Hamada, Satoshi ; Yoshitsugu, Junji ; Guo, Bin ; Nakaoka, Mutsuo
Author_Institution :
Graduate Sch. of Eng. & Sci., Yamaguchi Univ., Ube, Japan
fDate :
4/1/1998 12:00:00 AM
Abstract :
An improved single-ended push-pull (SEPP) half-bridge 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 is implemented. In order to demonstrate the remarkable effectiveness of this converter´s characteristics, feasibility experiments are conducted with a 150 W/200 kHz prototype of a high-frequency link ZVS-PWM DC-DC converter using power MOSFETs with an ultrafast soft-recovery diode
Keywords :
DC-DC power convertors; PWM power convertors; bridge circuits; commutation; electromagnetic interference; nonlinear network analysis; switching circuits; 150 W; 200 kHz; HF forward/flyback hybrid transformer link; RFI noise minimisation; ZVS-PWM DC-DC power converter; cascaded diode rectifier; constant frequency PWM regulation; half-bridge type; lossless capacitor type; minimized EMI; periodic steady-state circuit analysis; pulse width modulation; saturable reactor switch; single-ended push-pull configuration; soft commutation; zero-voltage soft-switching; Capacitors; DC-DC power converters; Frequency conversion; Magnetic switching; Pulse transformers; Pulse width modulation; Pulse width modulation converters; Radiofrequency interference; Switching converters; Voltage;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
