基于半桥逆变器的无线供电系统效率优化研究

Research on Efficiency Optimization of Wireless Power Supply System Based on Half-bridge Inverter

为了降低磁耦合谐振式无线供电系统中的线圈损耗,提升系统的能量传输效率,提出了一种基于半桥逆变器的无线供电系统,该系统可在不影响电压增益的条件下对系统发射线圈和接收线圈中的电流大小进行优化。同时提出了通过调节半桥逆变器导通占空比,使系统电流分配和能量传输效率达到最优的控制方案。实验表明,所提出的电路拓扑和效率优化方案可有效提升无线供电系统的传输效率。

To decrease the power loss in the coils of magnetically coupled resonant wireless power supply system and improve the system efficiency,a wireless power supply system based on half-bridge inverter is proposed.The proposed system can optimize magnitude of the currents in both transmitter coil and receiver coil,while the system voltage gain is not affected.Meanwhile,the control scheme for further optimizing the system efficiency by regulating the duty cycle of half-bridge inverter is proposed.Experimental results show that the proposed circuit topology and control scheme can effectively improve the transmission efficiency of the wireless power supply system.