Design, and Control of a SiC Isolated Bidirectional Power Converter for V2L Applications to both DC and AC Load

Abstract

EV can help export its unused energy to the external load (such as home appliance) when the vehicle is stationary. Hence a bidirectional power converter with such function is of need. Due to the safety concern, a galvanic isolation transformer is required. This paper presents an isolated universal power converter which can perform vehicle to load (V2L) feature for both AC load and DC load in one single unit. Design details such as SiC MOSFET gate drive and high frequency isolation transformer are disclosed in this paper. Control algorithm and analysis for both operation modes are also performed. Experimental results are shown to validate the hardware design and control algorithm development.