| 摘要: |
| 针对传统电路模型中复杂负载的磁耦合谐振式无线电能传输系统分析过于复杂，在实际应用中很难达到最优阻抗匹配而影响电能传输效率的问题，提出一种基于带通滤波器理论的阻抗匹配优化方法。首先，建立一种磁耦合谐振式无线电能传输系统的带通滤波器等效模型，通过建立模型简化分析过程并得到无线电能传输系统阻抗匹配的直接表达式；然后，根据阻抗匹配对电能传输效率影响的分析，得到复杂负载下的理论最优阻抗匹配，并且揭示了在低品质因数耦合谐振系统中优化电能传输效率的实际设计约束；最后，通过仿真和实验证明本文提出的最优阻抗匹配设计使系统具有更强的适应能力。 |
| 关键词: 阻抗匹配 带通滤波器 一般耦合矩阵 阻抗逆变器 无线电能传输 |
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| The Filter Equivalent Model and Impedance Matching Optimization for MRC-WTP Systems |
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YAN Wen-jun,XING Li-kun
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| Abstract: |
| An impedance matching optimization method based on BPF theory is proposed to solve the problem that the traditional magnetic coupled resonant wireless power transfer with complex loads is too complex to achieve the optimal impedance matching in practical application, which will affect the power transmission efficiency. In the first place, a model of magnetic coupled resonant wireless power transfer system which can be equivalent to a band-pass filter is established , the analysis process is simplified and the direct expression of impedance matching for wireless power transfer system is obtained; Next, based on the analysis of the effect of impedance matching on power transmission efficiency, the theoretical optimal impedance matching under complex loads is obtained, and the practical design constraints for optimizing power transmission efficiency in low quality factor coupled resonant system are revealed.Finally, simulation and experiment show that the optimal impedance matching design proposed in this paper can make the system more adaptive. |
| Key words: impedance matching Bandpass filter general coupling matrix impedance inverter wireless power transfer |
