A Novel Single-Phase Bidirectional Electric-Drive-Reconstructed Onboard Converter for Electric Vehicles

In this paper, an Electric-drive-reconstructed onboard converter (EDROC) based on a switching network in the DC side is proposed. The system can utilize the existing hardware of electric vehicles and does not need extra equipment. When the EDROC connects to the power grid through the power outlet at the office or home, there is not any additional equipment (filter or relay) on the AC side. Compare with traditional EDROC, the proposed novel EDROC has advantages in cost and volume. The EDROC can realize the unity power factor in the charging mode and discharges to drive the motor in the driving mode. A proof-of-concept prototype has been built to verify the charging function and driving function of the proposed EDROC.