Title :
Saturable reactor and lossless capacitor-assisted soft-switching asymmetrical PWM DC-DC converter with forward-flyback transformer link
Author :
Hamada, S. ; Ishiwatari, H. ; Mii, T. ; Nakaoka, M.
Author_Institution :
Dept. of Electr. & Electron. Eng., Yamaguchi Univ., Japan
Abstract :
An improved half-bridge type ZVS-PWM DC-DC power converter which uses a saturable reactor-assisted soft-switching technique is presented in this paper. The power converter with a high-frequency forward and flyback hybrid transformer link has many advantages such as lower switching and conduction losses, load operation in a wide range, constant frequency operation and minimized EMI. Its operating principle is illustrated and its steady-state circuit analysis are carried out. In order to demonstrate the remarkable effectiveness of the converter characteristics, feasible experiments are actually carried out with a 150 W-200 kHz prototype converter using power MOSFETs
Keywords :
DC-DC power convertors; PWM power convertors; bridge circuits; capacitors; field effect transistor switches; losses; power MOSFET; saturable core reactors; switching circuits; transformers; 150 W; 200 kHz; asymmetrical PWM DC-DC converter; constant frequency operation; forward-flyback transformer link; half-bridge; high-frequency; load operation; lossless capacitor-assisted converter; lower conduction losses; lower switching losses; minimized EMI; operating principle; power MOSFET; saturable reactor; soft-switching; steady-state circuit analysis; Circuits; DC-DC power converters; Frequency conversion; Inductors; Pulse width modulation; Pulse width modulation converters; Steady-state; Switches; Switching converters; Zero voltage switching;
Conference_Titel :
Industrial Electronics, Control, and Instrumentation, 1996., Proceedings of the 1996 IEEE IECON 22nd International Conference on
Conference_Location :
Taipei
Print_ISBN :
0-7803-2775-6
DOI :
10.1109/IECON.1996.566017
