Modeling, analysis and design of 10 kW parallel module zero-voltage zero-current switched full bridge PWM converter

Abstract

In this paper, the modeling and the design of the 10 kW parallel module converter are presented. Due to the high input voltage and power level, IGBTs are selected for the switching devices. The ZVZCS techniques enable the ZVZCS FB-PWM topology to operate at the switching frequency of 40 kHz, while maintaining an efficiency of over 94% at full load. The parallel scheme featuring power sharing and interleaving offers reduction of the overall system size and improvement of dynamics and EMI characteristics. A complete small-signal model for the ZVZCS FB-PWM converter employing the charge control is developed. The design equations and model predictions are verified by experimental results.