The invention provides a single-stage alternating-current quick charging system, and the system is characterized in that in a driving mode, an input chopping unit is closed, and the direct current ofa battery is converted into an alternating current through an inverter to drive a motor to rotate; in the charging mode, the input chopping unit is started, and when the input chopping unit performs chopping on the filtered alternating current, the energy storage inductor performs energy storage; when the input chopping unit does not chop, the switching tube of the inverter is multiplexed as the output follow current unit, and the electric energy of the energy storage inductor is subjected to follow current through the output follow current unit to charge the battery. According to the system,devices of an inverter of the electric vehicle are repeatedly utilized; meanwhile, a winding of the electric vehicle is reused as an energy storage inductor, the cost and size are reduced, the power density of the system is improved, and the system is an integrated charging and driving technical scheme. According to the scheme, the driver and the motor of the electric vehicle are reused, and the driver and the motor have high power levels, so the effect of rapid alternating-current charging can be achieved, and the charging time is greatly shortened.
本发明提供了一种单级交流快速充电系统,在驱动模态下,关闭输入斩波单元,电池的直流电通过逆变器转换为交流电以驱动电机转动;在充电模态下,开启输入斩波单元,当输入斩波单元对滤波后的交流电进行斩波时,储能电感进行储能;当输入斩波单元不斩波时,复用逆变器的开关管作为输出续流单元,储能电感的电能通过输出续流单元进行续流,对电池充电。该系统重复利用了电动车逆变器的器件,同时,还复用电动车的绕组作为储能电感,降低了成本与体积,提高了系统的功率密度,是一个集成充电和驱动的技术方案。本方案中复用电动车的驱动器和电机,由于其都是高功率级别,可以达到快速交流充电的效果,大大缩短了充电时间。
Single-stage alternating-current quick charging system
一种单级交流快速充电系统
11.12.2020
Patent
Elektronische Ressource
Chinesisch
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