基于BUCK降压和红外通信的电动自行车无线充电系统功率控制方法

由于安全性和便捷性的优势，电动自行车户外无线充电越来越成为人们的迫切需求。充电的过程中，需要根据车载蓄电池的充电曲线对传输功率进行控制。为实现高效、可控的电动自行车无线充电，本文提出了一种基于BUCK降压和红外通信的功率调节方法。其中，红外通信用以将接收端蓄电池的电气信息反馈到发射端控制器，发射端通过BUCK降压电路调节交流电源的电压幅值，从而调节系统的输出功率。接收端BUCK用以在传输距离突变时对电池充电进行保护。在设定好蓄电池的充电电压限值和电流限值这两个参数后，系统能够自动按照蓄电池的充电曲线进行充电。同时，对于充电过程中传输距离的变化也能够快速响应。

A methodology of output power control for electric bike wireless charging systems based on BUCK circuit and infrared communication

Due to the virtues of safety and convenience, outdoor wireless charging for electric bikes has been an emerging necessity for citizens. However, during the charging process, the transmitted power needs to be regulated to meet the charging curves of the electric bike-mounted batteries. To realize efficient and controllable wireless charging for electric bikes, a power regulating methodology based on BUCK circuit and infrared communication is proposed. Here, the infrared link is used to feed the charging state of battery back to the controller of transmitter, while the BUCK circuit at the transmitting side is used to regulate the voltage amplitude of the AC driving source, thus regulating the transmitted power. The BUCK circuit at the receiving side is used to protect the battery from the sudden change of transfer distance. With two parameters of charging voltage limit and charging current limit given, the battery can be charged automatically according to its charging curve using the proposed methodology. Besides, the proposed methodology can also realize fast response to distance variation during the charging process.