A new hybrid control scheme for reduction of secondary diode voltage stresses Based on interleaved PFC Asymmetrical Half Bridge Topology

Asymmetrical 반브리지 컨버터의 이차측 다이오드 전압스트레스저감을 위한 새로운 하이브리드 제어기법

This paper presents a new hybrid control method of asymmetrical half-bridge converter(AHBC) with low voltage stresses of the diodes and interleaved PFC(power factor correction). The proposed new control scheme can observe variation of secondary diodes voltage stresses by variation of duty ratio and then decide the control portions which are asymmetrical control and PFM(Pulse Frequency Modulation). Therefore, the proposed control scheme has many advantages such as a low rated voltage of the secondary diodes, low conduction loss according to the low voltage drop and wide zvs range by load variation. Through simulation results, the validity of the proposed control scheme is demonstrated.