基于推挽式E类逆变器的磁耦合谐振式无线电能传输研究

A Wireless Power Transfer System Based on Push-Pull Class-E Inverter

提出了一种基于推挽式E类放大器的高效率、低损耗的磁耦合谐振式无线电能传输系统。详细分析了电路参数,设计了大功率推挽式E类逆变器,并根据松耦合变压器理论建立了双线圈的磁耦合谐振式无线电能传输系统的等效电路模型。最后试制了系统,传输功率超过200 W,系统效率达到82.42%。

The output power of push-pull class E amplifier is as four times as that of the conventional single end class E amplifier,which expands the prospect of improving the output power of wireless power transfer system using class E amplifier.This paper represented a wireless power transfer system based on push-pull class E amplifier with high efficiency,high power and low cost.This paper analyzed the principle and circuit parameters of push-pull class E amplifier,especially in high power and low loss.Then,equivalent circuit model of magnetic resonance wireless power transfer system was established based on loosely coupled transformer considering two coils.Finally,a wireless power transfer system with power more than 200 W and efficiency over 82.42% was built up.