基于谐振电容阵列的CPT系统输出控制方法

针对非接触电能传输(CPT)系统的输出稳压控制,提出一种基于谐振电容阵列切换的输出控制方法。设计了谐振电容阵列的拓扑结构并给出其等效容值的计算方法。分析了CPT系统输出电压与拾取端谐振电容值的函数关系,并提出一种基于软开关模式的分段控制算法。该算法不借助辅助调压环节,直接实现对输出电压的控制,可满足较大范围的控制需求,并有助于实现多路输出的独立控制。实验结果验证了该控制算法的有效性。

Study on Output Voltage Stability of CPT System Based on Resonant Capacitor Array

Aimed at output voltage control of contactless power transfer (CPT) system, a novel capacitor array regulating strategy is presented. A special resonant capacitor array structure is designed for the strategy at the secondary side of the CPT system. The computing method of the array equivalent capacitance is also given.Furthermore, the relation between the array capacitance and the output voltage is analyzed and the output voltage regulating method is presented based on the switching among the array capacitors. The output control is realized by a piecewise control algorithm according to the output error amplitude. The control strategy can directly realize output control and satisfy the requirements for multi pickup and wide range control instead of using any auxiliary regulating stage. Finally, experiment results verify the capacitor array structure and the output control strategy.