The invention provides a constant-power wireless charging system, and relates to the technical field of wireless charging. Under the condition that an additional conversion layer is not needed, the compensation module and the wireless power transmission module are introduced into the resonance compensation circuit on the primary side, and the pulse density modulation control wave is connected to the second input end of the semi-active rectifier; therefore, the output current output by the resonance compensation circuit at the primary side to the wireless charging receiving device is irrelevant to the mutual inductance between the wireless power transmission module and the resonance compensation circuit at the secondary side, and the value of the output current can be controlled by adjusting the parameter values of all components in the compensation module; and modulating the duty ratio of the output AC voltage output by the resonance compensation circuit on the primary side to the wireless charging receiving device in a pulse density modulation control wave period, thereby achieving the purpose of adjusting the equivalent AC load, and further realizing wireless constant power charging. The system efficiency is obviously improved, and the system complexity and cost are reduced.
本申请提供恒功率无线充电系统,涉及无线充电技术领域。本申请在不需要额外的转换层情况下,通过在初级侧的谐振补偿电路中引入补偿模块和无线电力传输模块,以及通过在半有源整流器的第二输入端接入一个脉冲密度调制控制波;这样,使得初级侧的谐振补偿电路向无线充电接收装置输出的输出电流与无线电力传输模块与次级侧的谐振补偿电路之间的互感无关,并且输出电流的值还可以通过调整补偿模块中各元器件的参数值来控制;以及在一个脉冲密度调制控制波周期内来调制初级侧的谐振补偿电路向无线充电接收装置输出的输出交流电压的占空比,进而来达到调节等效交流负载的目的,进而实现了无线恒功率充电,显着提高了系统效率并降低了系统复杂性和成本。
Constant-power wireless charging system
恒功率无线充电系统
2023-01-13
Patent
Electronic Resource
Chinese
European Patent Office | 2024
|Constant-current constant-voltage anti-offset output wireless charging system and charging method
European Patent Office | 2021
|Constant current/constant voltage output method of wireless charging system
European Patent Office | 2021
|Anti-offset staged constant-current constant-voltage output wireless charging system
European Patent Office | 2022
|Constant-voltage and constant-current wireless charging method and device
European Patent Office | 2021
|