An Investigation of Power Control Characteristics of a Primary-/ Secondary-Side Dual Phase Shift PWM Controlled Series-Resonant Bidirectional DC-DC Converter

Abstract

A high-efficiency and high-performance bidirectional DC-DC converter is one of the key elements for interfacing the DC bus line and a battery in a DC micro grid system. A new prototype of primary-/secondary-side phase shifted zero voltage soft-switching (ZVS) pulse width modulation (PWM) dual resonant (series resonant and edge resonant) bidirectional DC-DC converter is proposed in this paper. The power regulation principle based on the primary-side phase shift (PPS) and secondary-side phase shift (SPS) is described by means of the simplified equivalent circuits of the proposed DC-DC converter. The essential performances of the bidirectional DC-DC converter are demonstrated in an experiment, then its validity is discussed from a practical point of view.