Yonsei University

Issac Kim

Jung Wook Park

Jungwook Park

Sunho Lee

An integrated power conversion apparatus for an electric vehicle according to the present disclosure includes a first H-bridge converter with one side connected to a high voltage battery; a three-winding transformer in which a primary winding is connected to the other side of the first H-bridge converter; a second H-bridge converter with one side which is connected to a secondary winding of the three-winding transformer; an AC-DC converter in which one side is connected to the other side of the second H-bridge converter and the other side is selectively connected to a motor or a power system; and a low voltage stage converter in which one side is selectively connected to a tertiary winding of the three-winding transformer through a selective switch and the other side is connected to a low voltage battery.

Integrated power conversion apparatus for electric vehicle and control method thereof

According to the integrated power conversion apparatus and method according to the exemplary embodiment of the present disclosure, the on-board battery charger (OBC), the lower voltage battery charger (LDC), and the traction converter (TC) are integrated to convert the power so that all the functions which need to be performed by the power conversion system of the related art can be performed. Further, the number of switches is reduced to increase a power density and not only the number of switches, but also the number of controllers is reduced to improve feasibility.

Integrated power conversion apparatus for xEV and integrated power conversion method thereof

The present disclosure relates to a multi-functional multi-ratio OBC/LDC integrated circuit that is capable of bidirectional operation over a broad voltage rage with a high power density and without additional control in a battery charging system for an electric vehicle. As the turns ratio can be used selectively, the G2V and V2G functions can be performed bidirectionally over a broad voltage range without additional control, and the LDC function can be operated by using only a small number of switches, so that the efficiency of the charging control can be increased.

Growing community of inventors

Seoul, South Korea

Issac Kim