Abstract
The compensation networks that realize constant current/constant voltage in the wireless power transfer are high-order resonant networks, and there are multiple resonance frequency points to achieve load-independent constant current/constant voltage output. However, the output characteristics of wireless power transfer based on high-order resonant networks are extremely susceptible to the effects of resonant network parameters. Therefore, the analysis of the resonance point of the wireless power transfer is helpful to select the appropriate resonance frequency point and achieve stable output. This article analyzes the resonance conditions of the double-sided LCC compensation network and then gives a parameter design method to achieve load-independent CC/CV output characteristics under ZPA conditions. The effects of the resonant network’s primary/secondary series compensation capacitor parameters on the resonance point and output characteristics of the wireless power transfer system are analyzed. Finally, the correctness of the parameter design of the resonance network and the accuracy of the theoretical analysis are verified.
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