The invention provides a pre-charging system for a capacitive load of an electric vehicle, which comprises a positive pole charging main circuit, a negative pole charging main circuit, a positive pole pre-charging circuit, a negative pole pre-charging circuit, a power supply and a load capacitor, and is characterized in that the positive pole charging main circuit is connected with the positive pole pre-charging circuit in parallel; and the negative pole charging main circuit is connected in parallel with the cathode pre-charging circuit. According to the invention, the circuit structure is simplified, three paths of positive pre-charging circuits are connected in parallel with the positive main switch unit, the negative pre-charging circuit is connected in parallel with the negative main switch unit, and at least one of the positive pre-charging circuit and the negative pre-charging circuit comprises the pre-charging resistor, so that the structure change plasticity is high, and different use requirements can be met; and the user side is high in use flexibility, so that the user does not need to repeatedly negotiate with a component manufacturer before purchasing to confirm whether the selected model meets the use requirement or not.
本发明提供一种电动汽车容性负载的预充电系统,包括:正极充电主电路、负极充电主电路、正极预充电电路、负极预充电电路、动力电源以及负载电容,其特征在于,所述正极充电主电路与所述正极预充电电路并联,所述负极充电主电路与所述负极预充电电路并联。本发明将电路结构简化,将正极预充电电3路与正极主开关单元并联、负极预充电电路与负极主开关单元并联,且在正极预充电电路和负极预充电电路中至少有一个包含预充电电阻,使得其结构变化可塑性强,可以满足不同的使用需求,用户端使用灵活性强,使得用户购买前不再需要与元器件生产厂家反复协商、确认选择的型号是否满足使用需求。
Pre-charging system for capacitive load of electric vehicle
一种电动汽车容性负载的预充电系统
2021-12-24
Patent
Electronic Resource
Chinese
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