Title :
Optimized design of ZVS-ZCS PWM FB DC/DC converter with lossless snubber
Author :
Jian´an Cao ; Wang, Zhaoan
Author_Institution :
Dept. of Electr. Eng., Xi´´an Jiaotong Univ., China
Abstract :
Using the snubber net made of diodes and capacitances, in the zero-voltage-switch full-bridge (ZVS-FB) converter, can not only decrease the parasitic resonance in the rectified voltage of the transformer secondary, but also obtain zero-current-switch (ZCS) in the lag leg. In addition, this topology can eliminate the circulating current existing in the ZVS-FB topology circuit. The diode clamp circuit introduced in the transformer primary can apparently restrain the peak voltage resonance in the rectified diodes. By applying those techniques, one 3 kW DC/DC converter has been achieved and its transformer primary current waveform and rectified voltage waveform of the transformer secondary has been illustrated in this paper
Keywords :
DC-DC power convertors; PWM power convertors; bridge circuits; capacitance; power semiconductor diodes; snubbers; switching circuits; transformers; 3 kW; ZVS-ZCS PWM FB DC/DC converter; capacitances; circulating current elimination; diode clamp circuit; diodes; lag leg; lossless snubber; parasitic resonance reduction; peak voltage resonance restraint; rectified voltage; rectified voltage waveform; transformer primary; transformer primary current waveform; transformer secondary; zero-current-switch; zero-voltage-switch full-bridge converter; Circuit topology; DC-DC power converters; Design optimization; Diodes; Parasitic capacitance; Pulse width modulation; Pulse width modulation converters; Resonance; Snubbers; Zero current switching;
Conference_Titel :
Power Electronics and Motion Control Conference, 2000. Proceedings. IPEMC 2000. The Third International
Conference_Location :
Beijing
Print_ISBN :
7-80003-464-X
DOI :
10.1109/IPEMC.2000.884636
