Title: Research on bidirectional isolated on-board charger based on CLLC resonant converter

Authors: Kai Zhou; Zan Liu; Dongyang Sun; Ningzhi Jin

Addresses: Engineering Research Center of Automotive Electronics Drive Control and System Integration, Ministry of Education, Harbin University of Science and Technology, No. 52, Xuefu Road, Harbin, Heilongjiang, 150080, China ' Engineering Research Center of Automotive Electronics Drive Control and System Integration, Ministry of Education, Harbin University of Science and Technology, No. 52, Xuefu Road, Harbin, Heilongjiang, 150080, China ' Engineering Research Center of Automotive Electronics Drive Control and System Integration, Ministry of Education, Harbin University of Science and Technology, No. 52, Xuefu Road, Harbin, Heilongjiang, 150080, China ' Engineering Research Center of Automotive Electronics Drive Control and System Integration, Ministry of Education, Harbin University of Science and Technology, No. 52, Xuefu Road, Harbin, Heilongjiang, 150080, China

Abstract: This paper presents a bidirectional isolated on-board charging system for electric vehicles. The charging system is composed of a front-end circuit and a back-end circuit. The front-end circuit is a bidirectional totem-pole power factor correction converter, and the back-end circuit is a bidirectional CLLC resonant converter. According to the design requirements of the charging power supply system, the key parameters of the CLLC resonant converter are selected and calculated. Through sampling, the output voltage and input current of the front-end circuit are obtained, and compared with the reference value and compensated, and the on-off time of the switch in the front-end circuit is finally controlled. The latter circuit uses the loop control mode to control the switch frequency of the switch to achieve constant voltage and current charging. A 3.3-kW vehicle charging system prototype was constructed. The simulation and experimental results verify the correctness of the design.

Keywords: vehicle charging system; bidirectional totem-pole converter; CLLC resonant converter; zero-voltage switching.

DOI: 10.1504/IJPELEC.2023.133058

International Journal of Power Electronics, 2023 Vol.18 No.3, pp.235 - 260

Received: 06 Jul 2021
Accepted: 28 May 2022
Published online: 29 Aug 2023 *

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