Title :
A Current driven Half-Bridge ZCS with asymmterical PWM operation
Author :
Hyun, B.C. ; Kim, Woo Soo
Author_Institution :
Seoul National University, Department of Electrical Engineering, #043, San 56-1, Sillim-dong, Gwanak-gu, Seoul, Korea 151-742, Email: novasa@pesl.snu.ac.kr
Abstract :
In this paper, for the high voltage step up application, a current driven half-bridge ZCS (Zero Current Switching) boost converter with the asymmetrical PWM control is presented. ZCS is achieved in main switches and rectifier diodes by an internal resonant circuit operating in asymmetrical PWM. The leakage inductance of the transformer is used as the resonant inductor and the junction capacitance of the rectifier diode can be absorbed into the resonant capacitor. The current stress of the switches is decreased by a clamping diode. The operation principle and simplified voltage conversion ratio of the circuit is presented. The experimental results are verified with a 300W 42V-312V prototype converter.
Keywords :
Diodes; Pulse width modulation; Pulse width modulation converters; Rectifiers; Resonance; Switches; Switching converters; Voltage control; Zero current switching; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE
Print_ISBN :
0-7803-9716-9
DOI :
10.1109/PESC.2006.1711900
