Optimized design for three port transformer considering leakage inductance and parasitic capacitance

Abstract

The power flow capability of high frequency phase-shifted dc-dc converter depends on transformer leakage inductance and switching frequency. The design of multi-port transformer requires optimized volume and losses with required leakage inductance for rated power flow. Use of fast-switching SiC devices also demand low inter-winding parasitic capacitance for reduced common mode current. The work in this paper focuses on loss-volume optimized design of three port high frequency transformer integrating PV and Energy Storage(ES) based on leakage inductance and parasitic capacitance model. Two laboratory prototypes of 50kHz and 100kHz operating frequency have been designed to verify the leakage and parasitic capacitance model based design and the losses of the transformers.