Single phase single stage bi-directional level 1 electric vehicle battery charger

Abstract

A single phase single stage level-1 electric vehicle (EV) battery charger can control the power flow in both directions. The converter efficiency is high as the devices undergo ZCS which reduces switching loss in the devices. This converter does not require any intermediate DC link capacitor stage and the power density of the converter is high.

What is claimed is: 
     
         1 . A power converter having bidirectional power flow capabilities and inherent power factor correction (PFC) control, comprising:
 a high frequency transformer comprising a primary AC side, a secondary side, and a resonating circuit,   wherein the primary AC side of the high frequency transformer comprises a current-fed full bridge matrix converter, wherein the current-fed full bridge matrix converter comprises eight silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors (MOSFETs) positioned in four pairs, wherein a first pair of SiC MOSFETS consists of a first A SiC MOSFET and a first B SiC MOSFET, wherein a second pair of SiC MOSFETs consists of a second A SiC MOSFET and a second B SiC MOSFET,   wherein a third pair of SiC MOSFETs consists of a third A SiC MOSFET and a third B SiC MOSFET, and wherein a fourth pair of SiC MOSFETs consists of a fourth A SiC MOSFET and a fourth B SiC MOSFET,   wherein the secondary side of the high frequency transformer comprises a full bridge matrix converter, wherein the full bridge matrix converter comprises four SiC MOSFETs, wherein the four SiC MOSFETs consist of a fifth SiC MOSFET, a sixth SiC MOSFET, a seventh SiC MOSFET, and an eighth SiC MOSFET, and   wherein the resonating circuit comprises a leakage inductor of the high frequency transformer and a capacitor.   
     
     
         2 . An electric vehicle (EV) battery charger comprising the power converter of  claim 1 . 
     
     
         3 . The electric vehicle (EV) battery charger of  claim 2 , further comprising an input source and a battery. 
     
     
         4 . One or more photovoltaic cells comprising the power converter of  claim 1 .