磁耦合无线电能传输频率控制技术研究进展

磁耦合谐振式无线电能传输技术因其可靠性和实用性等优势进而成为近几年的研究热点。当电源频率与发射端和接收端电路的固有谐振频率相同时，系统可以取得较高的传输效率。但系统有时可能会偏离谐振状态，造成传输效率大幅下降。在对频率分裂现象进行研究后，分析了几种抑制频率分裂的方法，并从动态补偿、频率跟踪等方面给出了使得系统恢复谐振频率的对策。最后对系统频率控制技术进行了总结，并展望了未来的发展趋势。

Research Progress of Frequency Control Technology for Magnetically Coupled Wireless Power Transfer

Magnetic coupling resonance wireless power transfer technology has become a research hotspot in recent years due to its reliability and practicability. When the power frequency is the same as the natural resonance frequency of the transmitter and receiver circuits, the system can achieve higher transfer efficiency. However, the system may sometimes deviate from the resonance state, resulting in a significant drop in transmission efficiency. After studying the phenomenon of frequency splitting, this article analyzes several methods to suppress frequency splitting, and gives countermeasures to restore the resonant frequency of the system from dynamic compensation and frequency tracking. Finally, the system frequency control technology is summarized and the future development trend is prospected.