This study investigates the comparative design method of a wireless power system to power sensors in an extended range when a Class E inverter is used at a certain frequency. It is known that the compatibility of the Class E inverter and the WPT system is the premise to incorporate them together. The relationship among different system parameters is discussed to ensure the soft switching of the Class E inverter. The constraints of parameter configurations are investigated by using the quality factor of the load as the criteria. A specific method of parameter configuration for classic WPT systems (E-2CWPT and E-3CWPT) is proposed by taking the soft switching of the Class E inverter, the overall efficiency and the charging power into account. The efficient transfer ranges for different types of WPT systems are then compared. The simulations and the experimental results show that the Class E-3CWPT system has a more extended effective range and better transfer performances than the Class E-2CWPT system at a certain frequency.

中文翻译：

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在一定频率下使用E类逆变器扩展范围的传感器无线电源系统的比较设计方法

本研究研究了在一定频率下使用E类逆变器时，无线电源系统向扩展范围内的传感器供电的比较设计方法。众所周知，E类逆变器和WPT系统的兼容性是将它们结合在一起的前提。讨论了不同系统参数之间的关系，以确保E类逆变器的软开关。通过使用负载的品质因数作为标准来研究参数配置的约束。通过考虑E类逆变器的软开关，整体效率和充电功率，提出了经典WPT系统（E-2CWPT和E-3CWPT）的参数配置的特定方法。然后比较不同类型的WPT系统的有效传输范围。