Abstract
In this paper, a novel ZCZVS asymmetrical dual switch forward converter with a ZCS cell is proposed. The proposed active clamp circuit helps primary switches to realize zero-voltage switching and to expend the duty cycle, while the proposed ZCS cell helps to realize zero-current switching on primary switches and the rectifier diode. All the primary semiconductor devices turn on and off under soft switching. The converter has a simple structure and minimum number of components compared with other ZCZVS dual switch forward converters. The analysis of steady state and commutation process is presented, along with design considerations. At last, a prototype is provided to verify the theory.
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