电磁耦合谐振式传能系统的频率分裂特性研究

电磁耦合谐振式无接触电能传输系统的发射侧与接收侧同时工作于谐振状态,补偿电容的引入导致系统在不同工况下可能存在多个谐振点。控制策略选取不当,会导致负载接收功率减少、系统性能大幅下降。首先通过耦合模理论建立电磁耦合谐振系统的高阶数学模型,在此基础上深入分析模式耦合因数及品质因数对系统谐振角频率的影响,并得出不同工况下谐振角频率的变化规律。最后根据理论分析设计了盘式振荡器耦合系统进行实验。测量结果表明,实际频率分裂特性与理论推导的函数关系基本吻合,因此可为谐振式电能传输系统的设计提供参考。

Research on Characteristics of Frequency Splitting in Electromagnetic Coupling Resonant Power Transmission Systems

Resonant state is required both on transmitting and receiving terminal in an electromagnetic field resonance coupling system.However,there may be more than one resonant point when compensation capacitors are introduced.The active power on the load is decreased;furthermore system performance is dropped significantly if control strategy is selected inappropriately.Firstly,a higher order mathematical model of electromagnetic(EM) resonance coupling system was built.Then it discussed the influence of mode coupling factor and quality factor on angular frequency to obtain the change law under different operating conditions.In the experimental aspect,a resonance coupling system contains disc oscillators was designed.It is shown by measurement results that property of frequency splitting is basically consistent with functions derived in the article,so it can be provided as a reference for design an EM resonance coupling system.