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Active-clamp soft-switching step-up converter with high-voltage gain

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1 Author(s)
Do, H.-L. ; Dept. of Electron. & Inf. Eng., Seoul Nat. Univ. of Technol., Seoul, South Korea

An active-clamp soft-switching step-up converter with high-voltage gain is proposed. By utilising the active-clamp circuit, the voltages across the power switches in the proposed converter are clamped and the zero-voltage switching of the power switches is achieved. To increase the voltage gain, two voltage doubler rectifiers are connected serially and stacked on top of the clamp capacitor. Therefore high-voltage gain is obtained and soft-switching characteristic is achieved. Also, the voltage stresses of the power switches and the output diodes are effectively reduced. Theoretical analysis and performance of the proposed converter are verified on a 110 W experimental prototype operating at 110 kHz switching frequency.

Published in:

Power Electronics, IET  (Volume:4 ,  Issue: 9 )