Title: Research on two-stage on-board charging system based on IPOP LLC resonant converter

Authors: Kai Zhou; Yanze Wu

Addresses: Engineering Research Center of Automotive Electronics Drive Control and System Integration (Ministry of Education), Harbin University of Science and Technology, Harbin, Heilongjiang, China ' Engineering Research Center of Automotive Electronics Drive Control and System Integration (Ministry of Education), Harbin University of Science and Technology, Harbin, Heilongjiang, China

Abstract: In this paper, a two-stage on-board charging system based on IPOP LLC resonant converter is proposed. The front stage uses a three-phase VSR, which can realize the PFC function and provide a stable DC voltage to the rear stage. The rear stage adopts IPOP LLC resonant converter, low output current ripple, output a wide range of DC voltage, the soft switch over the full load range, and the system efficiency is high. Voltage current double closed-loop control is used for the front stage converter and outputs stable DC voltage. The rear stage converter adopts variable frequency voltage regulation control and phase shift current sharing control, which reduces the volume of the filter capacitor and improves the overall performance and power density of the on-board charging system. A 3.3 kW system simulation model is built to prove the correctness of the theoretical analysis and parameter design method.

Keywords: electric vehicle; on-board charging system; three-phase VSR; IPOP LLC resonant converter; soft switch.

DOI: 10.1504/IJEHV.2024.139997

International Journal of Electric and Hybrid Vehicles, 2024 Vol.16 No.3, pp.203 - 228

Received: 15 Jul 2023
Accepted: 19 Nov 2023
Published online: 15 Jul 2024 *

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