Title :
Saturable reactor and lossless capacitor-assisted zero voltage transition asymmetrical PWM DC-DC converter with high-frequency transformer link
Author :
Hamada, S. ; Mii, T. ; Shimizu, I. ; Nakaoka, M.
Author_Institution :
Yamaguchi Univ., Japan
Abstract :
An improved half-bridge type ZVS-PWM DC-DC power converter with quasi resonant pole which makes use of a saturable reactor-assisted soft-switching technique is presented in this paper. The power converter with a high-frequency transformer link has many advantages such as lowered switching and reduced conduction losses, wide load operation range, constant frequency operation and minimized EMI. Its operating principle is illustrated and its steady-state circuit analysis is carried out. In order to demonstrate the remarkable effectiveness of the characteristic performances, experiments are carried out with a 150 W-200 kHz prototype DC-DC power converter using power MOSFETs.
Keywords :
DC-DC power convertors; PWM power convertors; bridge circuits; high-frequency transformers; losses; power MOSFET; resonant power convertors; saturable core reactors; switching circuits; 150 W; 200 kHz; EMI minimisation; asymmetrical PWM DC-DC converter; constant frequency operation; half-bridge ZVS-PWM DC-DC power converter; high-frequency transformer link; lossless capacitor-assisted zero voltage transition; lowered switching losses; power MOSFET; quasi resonant pole; reduced conduction losses; saturable reactor; soft-switching technique; steady-state circuit analysis; wide load operation range; zero voltage switching;
Conference_Titel :
Power Electronics and Variable Speed Drives, 1996. Sixth International Conference on (Conf. Publ. No. 429)
Print_ISBN :
0-85296-665-2
DOI :
10.1049/cp:19960908
