Zero-Current Transition Interleaved Boost Converter

In this paper, a new ZCS PWM auxiliary circuit for the interleaved boost converter is introduced which uses only one auxiliary switch to provide soft-switching condition. In the proposed interleaved converter, soft switching is obtained for all semiconductor devices. The main and auxiliary switches turn on and off under zero-current condition. Thus, the reverse-recovery losses of boost diodes are reduced and also, high efficiency is achieved due to reduction of switching losses. In addition, the proposed circuit is controlled by pulse-width modulation (PWM) method. The converter is analyzed and the design procedure is discussed. Simulation results are presented to verify the validity of theoretical analysis.

Keywords:

Interleaved boost converter , soft switching , zerocurrent switching , zero-voltage switching