The invention discloses a current sharing compensation method for a multi-module wireless charging system. Each module in the charging system comprises a transmitting coil, a receiving coil and a setof independent transmitting end circuit and receiving end circuit, the transmitting end circuit comprises a direct current input, an inverter and a compensation network, the receiving end circuit comprises a rectifier bridge and a compensation network or further comprises a DC-DC converter, and the output sides of all the modules are connected in parallel to output a load. Compensation capacitors(or inductors) obtained through calculation are added into a transmitting end circuit and a receiving end circuit of a specific module, so that current sharing of a symmetric and asymmetric multi-module wireless charging system can be realized. Compensation calculation can be carried out by using a mutual inductance value when the coil deviates (such as half of the maximum deviation distance), sothat the current sharing in the whole deviation range is ensured. According to the method, current sharing can be realized for any plurality of wireless charging modules, and the universality of the method is not influenced by a multi-module wireless charging system in any form and a control mode.
本发明公开了一种多模块无线充电系统的均流补偿方法,所述的充电系统中每个模块包含一个发射线圈、一个接收线圈以及一套独立的发射端电路和接收端电路,发射端电路包括直流输入、逆变器、补偿网络,接收端电路包括整流桥、补偿网络,或还包含DC‑DC变换器,所有模块的输出侧并联,对负载进行输出。在特定模块的发射端及接收端电路中加入计算所得的补偿电容(或电感)可以实现对称及非对称多模块无线充电系统的电流均流。可使用线圈发生偏移时(如最大偏移距离的一半)的互感值进行补偿计算,以保证在整个偏移范围内的均流。本发明所述方法可以针对任意多个无线充电模块实现电流均流,任意形式的多模块无线充电系统及控制方式都不影响此方法的通用性。
Current sharing compensation method suitable for multi-module wireless charging system
一种适用于多模块无线充电系统的均流补偿方法
2020-11-03
Patent
Electronic Resource
Chinese
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