过耦合无线电能传输系统的最大功率输出控制
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摘要
提出一种跟踪分叉频率并同时匹配次级阻抗的控制方法,实现了非对称系统在过耦合时的最大功率输出。利用Matlab分析了频率分叉和频率分裂现象的特点和异同;推导了临界耦合系数表达式,给出了在过耦合状态下的高低分叉频率的具体关系式和具体的控制策略。仿真和实验表明,所提出的方法能够有效实现非对称系统的最大功率输出。
A method of tracking the bifurcation frequency and adjusting the secondary compensation capacitance is proposed to achieve the maximum output power for the asymmetrical system in the overcoupled state.The frequency splitting and frequency bifurcation phenomena are discussed by numerical analysis of Matlab.The critical coupling state is analyzed and bifurcation frequency equations are derived and the control strategy is elucidated.Simulation and experimental results verify the correctness and feasibility of the proposed method.
A method of tracking the bifurcation frequency and adjusting the secondary compensation capacitance is proposed to achieve the maximum output power for the asymmetrical system in the overcoupled state.The frequency splitting and frequency bifurcation phenomena are discussed by numerical analysis of Matlab.The critical coupling state is analyzed and bifurcation frequency equations are derived and the control strategy is elucidated.Simulation and experimental results verify the correctness and feasibility of the proposed method.
引文
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[4] Lyu Y L,Meng F Y,Yang G H,et al.A Method of Using Nonidentical Resonant Coils for Frequency Splitting Elimination in Wireless Power Transfer[J].IEEE Trans. on Power Electronics, 2015,30(11):6097-6107.
[5] Wang C S,Covic G,Stielau O H.Power Transfer Capability and Bifurcation Phenomena of Loosely Coupled Inductive Power Transfer Systems[J].IEEE Trans. on Industrial Electronics, 2004,51(1):148-157.