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New zero-current switching PWM converters using power MOSFET for lower power applications

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3 Author(s)
Keun-Soo Ma ; Rocket Technol. Div., Korea Aerosp. Res. Inst., Taejon, South Korea ; Gyu-Bum Joung ; Yang-Mo Kim

In this paper, a new ZCS-PWM DC/DC power converter in which the auxiliary resonant circuit consists of minimum elements, a resonant inductor, a resonant capacitor and an auxiliary switch, and it is only activated during the main switch commutation is proposed, particularly for low-power applications. The main switch operating under ZCS, and auxiliary switch and main diode operating under ZCS or ZVS at both turn-on and turn-off, is also achieved. A 100 kHz, 60 W breadboarded boost converter has been implemented to verify the operation and performance of the proposed converter. The measured efficiency of the proposed scheme as a function of the output power was 89.35% at full load. Without the proposed scheme, the converter efficiency for the same load was 80.53%.

Published in:

Power Electronics Specialists Conference, 2002. pesc 02. 2002 IEEE 33rd Annual  (Volume:2 )

Date of Conference:

2002