LC移相补偿在无线传能系统性能提升中的应用

Application of LC Phase-Shift-Compensation in Enhancing the Capability of Wireless Power Transmission System

为提高无线电能传输系统中电能传递的功率和传递的效率,文中对LC谐振式无线传能电路中采用移相控制技术后的能量传输情况做了研究。简单介绍了LC移相补偿的原理,在Simulink平台下仿真了移相控制下发射端和接收端之间的耦合磁场随移相角的变化情况,并通过实验测量了不同移相角下的电压、电流参数。由仿真和实验结果可知当在区间0-π⁄2时,增加移相角度,接收端功率增加;当移相角度为π⁄2时,接收端功率达到最大,在区间π⁄2-π时,增加移相角度,接收端功率减小;当移相角度为π时,接收端功率降为最低。综上可知移相控制在无线传能系统中可以提升其传输功率。

In order to improve the power and transfer efficiency of wireless power transmission system,the transmission of LC resonant wireless transmission circuit using phase-shift control technology is studied in this paper.The principle of phase-shift control and LC resonant wireless transmission is introduced.The coupling magnetic field between the transmitter and the receiver is simulated and the voltage and current parameters at different phase-shift angles are measured experimentally.From the simulation and experimental results,we can see that when the phase-shift angle is increased in the interval[0-π/2],the power of the receiver increases.When the angle isπ/2,the power of the receiver reaches the maximum,and in the interval[π/2-π],the receiving end of the power reduction as the phase-shift angle increased,when the phase angle arrivedπ,the receiver power hit the minimum.In summary,the Phase Shift Control in the wireless energy transmission system can enhance its transmission power.