New phaseshifted control with equal loss distribution

SUN Yuanyue, WANG Feifei, DAI Kaiqi, CHEN Huiming

(School of Electrical Engineering, Zhejiang University, Hangzhou 310000, China)

Abstract: Aiming at the problems that disequilibrium of loss distribution of arms of fullbridge topology with phaseshifted control, research was made to fulfill equal loss distribution by function exchange between main arm and phaseshifted arm. A new digital phaseshifted control strategy based on digital signal processor was proposed, and test was made on a 150 kW inductive heating power source based on full bridge topology to testify the feasibility of the proposed control strategy by analyzing the current on IGBT when it turningon or turningoff. The results indicate that the proposed control strategy can balance the power loss between two arms equally while achieving all the funtions traditional phaseshifted control has.

Key words: phaseshifted control; equal of loss distribution; fullbridge topology