关键词: 方程式赛车；预充电回路；放电回路；Simulink 仿真

Abstract: In order to ensure the fairness and safety of the FSEC event, the competition has formulated strict regulations. Among them, the safety circuit is the most important link to ensure the safety of the racing electrical system. A pre-charging circuit is installed in the high voltage part of the vehicle to effectively relieve the high voltage on the racing car. The huge pressure rise generated in the process ensures the electrical safety of the power battery and the entire vehicle. According to the basic theoretical knowledge of the circuit, the specific parameters of the pre-charge resistance and the pre-charge relay are calculated, and the Simulink software is used to simulate the high-voltage power-on process of the racing car. The layout of the pre-charge circuit is designed and the pre-charge circuit is set and the pre-charge circuit is not set. The difference in the high-pressure process verifies the design effect. In the end, the design results were applied to real vehicles, showing good accuracy and robustness.

Key words: Formula racing; Pre-charging circuit; Discharging circuit; Simulink simulation