Title :
A novel synchronous rectifiers based ZVS-PWM DC-DC power converter with extended soft-switching operation range
Author :
Sato, Shinji ; Moisseev, Serguei ; Nakaoka, Mutsuo
Author_Institution :
Div. of Syst. Eng., Yamaguchi Univ., Japan
Abstract :
In this paper, a full bridge edge-resonant zero voltage mode based soft-switching PWM DC-DC power converter with a high frequency transformer link is presented. Active power MOSFETs operating as synchronous rectifier are implemented in the rectifier stage to reduce conduction losses and also to extend ZVS commutation area of the primary side power MOSFETs from rated to zero load without requirement of a magnetizing current. The operation of this phase-shift PWM controlled converter is described in comparison with conventional ZVS phase-shifted PWM DC-DC power converter with diodes rectifier. Moreover, the experimental results of the switching power losses analysis are discussed in this paper. The practical effectiveness of the power DC-DC power converter treated here is proved from a practical point of view by using 2.5 kW, 32 kHz breadboard circuit. An actual efficiency 97% of this converter is measured in the experiment.
Keywords :
DC-DC power convertors; PWM power convertors; power MOSFET; rectifying circuits; switching convertors; 2.5 kW; 32 kHz; 97 percent; diodes rectifier; full bridge edge-resonant zero voltage mode; high frequency transformer link; phase-shift PWM controlled converter; power MOSFET; soft-switching PWM DC-DC power converter; switching power losses analysis; synchronous rectifier; Bridge circuits; DC-DC power converters; Diodes; Frequency conversion; MOSFETs; Magnetic analysis; Pulse width modulation; Pulse width modulation converters; Rectifiers; Zero voltage switching;
Conference_Titel :
Telecommunications Energy Conference, 2003. INTELEC '03. The 25th International
Conference_Location :
Yokohama, Japan
Print_ISBN :
4-88552-196-3
