Title :
An improved zero voltage and zero current switching full bridge PWM converter with secondary active clamp
Author :
Baek, J.W. ; Cho, J.G. ; Yoo, D.W. ; Rim, G.H. ; Kim, H.G.
Author_Institution :
Korea Electrotechnol. Res. Inst., Changwon, South Korea
Abstract :
An improved zero voltage and zero current switching (ZVZCS) full bridge (FB) PWM converter is proposed to solve the problems of the previously presented ZVZCS-FB-PWM converter with secondary active clamp such as narrow ZVS range of leading-leg switches. By adding an auxiliary inductor in between the leading-leg and separated input source voltages, the ZVS of leading leg switches can be extended to the whole line and load ranges, which eliminates unwanted hard switching of clamp switch and simplifies its control. The principle of operation is explained and analyzed. The features and design considerations of the proposed converter are also illustrated and verified on a 3 kW, 100 kHz IGBT based experimental circuit
Keywords :
PWM power convertors; bridge circuits; inductors; switching circuits; 100 kHz; 3 kW; auxiliary inductor; clamp switch; full bridge PWM converter; leading-leg switches; secondary active clamp; separated input source voltages; unwanted hard switching; zero current switching; zero voltage switching; Bridge circuits; Clamps; Inductors; Leg; Pulse width modulation; Pulse width modulation converters; Switches; Switching converters; Zero current switching; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE
Conference_Location :
Fukuoka
Print_ISBN :
0-7803-4489-8
DOI :
10.1109/PESC.1998.703117
