手机无线充电系统的设计与实现

设计了一种基于半桥式逆变技术和磁感应耦合技术的无线充电系统，整个系统由电源模块、整流滤波模块、高频逆变模块及分离式变压器4部分组成。采用多个初级线圈并联的方式为多个手机类负载同时供电，并通过分离式变压器线圈的优化设计提高了系统性能。测试结果表明该系统克服了采用单个初级线圈充电区域不足、各个设备充电效率低的缺点，减弱了待充电设备间的相互干扰，使其充电效率相当且都能获得基本恒定的电压，具有能量传输效果好、安全方便、成本低、适用范围广等优势。

Design and Implementation of Wireless Charging System for Mobile Phone

A wireless charging system has been designed and implemented based on the half-bridge inverter technology and the magnetic induction coupling technology. The system is mainly consisted of four parts, including the power module, the rectifier filter module, the high frequency inverter module and the isolation transformer. By using multiple primary coils in parallel, the system can provide electricity for multiple mobile phones in the same time. The system performance is also improved by optimizing the coils of the isolation transformer. Testing results indicate that the designed system can overcome the shortcomings of similar charging systems using a single primary coil, such as insufficient charging area and low charging efficiency. The interference among different equipments to be charged can be reduced. The charging efficiency and voltage are almost equivalent for multiple electronic loads. The high electric energy transfer efficiency, the good safety and the low cost make this wireless charging system suitable for various applications.