基于LCC的磁谐振无线电能传输发射端补偿技术

Compensation Technology of Magnetic Resonant Wireless Power Transfer Transmitter Based on LCC

为实现磁耦合谐振式无线电能传输系统最大化功率传输,提升整机效率,提出了一种基于LCC三阶补偿网络结构的保持发射端线圈电流恒定的方法,此方法不受接收端反射阻抗影响,实现了电磁感应式无线电能传输(ICPT)系统发射端与接收端解耦设计。同时,提出了LCC补偿网络的数学模型及其参数设计方法。在不增加元件的情况下,采用LCC网络的输入基波电流补偿LCC网络的输入高次谐波电流的方法,在功率管关断瞬间,降低通过功率管的电流瞬时值,实现了高频逆变器的零电流关断,减小了功率管的开关损耗和开关应力,提高了ICPT系统的整体效率。最后,对所提方法进行了仿真分析和实验验证。仿真和实验结果验证了所提模型和参数设计方法的正确性和可行性。

In order to maximize the power transmission capability of the magnetic couplingresonant wireless power transmission system, and to improve the efficiency of the whole system, acompensation circuit design method which based on LCC three order network is proposed. Theproposed method, which is not affected by the receiver reflected impedance, can keep the current in thetransmitter coil constant, make the design procedure of the inductive contactless power transmission(ICPT) system transmitter and receiver decoupled. In the meanwhile, a LCC compensating networkmathematical model and a method of parameter design is put forward. Without adding new electroniccomponents, by using the input fundamental current of LCC networks to compensate the inputharmonic current of LCC networks, the instantaneous current value at the switching time of the highfrequency inverter is reduced. Thus, zero current switching of high frequency inverter is realized, theswitching loss and switching stress of the power tube is reduced, and the overall efficiency of the ICPTsystem is improved. Finally, the computer simulation analysis and experimental verification of theproposed method are carried out. The simulation and experiment results show that the proposed methodis correct and feasible.