A ZCS-PWM interleaved boost rectifier

This paper analyses and designs a ZCS-PWM single-phase high power factor interleaved boost rectifier. The proposed rectifier combines the conventional pulse-width-modulation technique and soft commutation technique to promote the circuit performance. The proposed rectifier uses two boost rectifiers with interleaved operation to increase the output power and reduce the output ripple current and input current ripple. Comparison with conventional interleaved boost rectifier, the proposed rectifier has not additional current stress on main switches. A ZCS-PWM auxiliary circuit is configured in the presented rectifier to provide the ZCS function on main switches and auxiliary switches and improve the problem of switching losses and EMI. A prototype has been implemented in laboratory to verify circuit theory.