Abstract In this paper, a contactless power transfer system is presented. It is designed to supply piezoelectric actuators with a low frequency signal and a DC offset. A power electronic structure based on a full bridge PWM inverter, a resonant capacitor, an inductive rotating transformer which works at low frequencies and the piezoelectric actuator is presented and modeled. The behavior of the system is analyzed regarding the variation of the transformer’s coupling coefficient and the resonant capacitor value. Then, an optimization tool is presented where magnetic and power properties of the system are optimized in terms of electrical performances and volume. An embedded passive electronic system, that creates the mandatory DC offset for the actuator, is shown. Experimental results obtained with the prototype are exposed and compared to the simulations. Based on these results, a new version with a secondary quasi-resonant topology has been studied allowing both to reduce the size of the transformer and the global efficiency.

中文翻译：

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用于高性能航空钻井系统中旋转压电致动器的无线电源

摘要 在本文中，提出了一种非接触式电力传输系统。它旨在为压电致动器提供低频信号和直流偏移。提出并建模了基于全桥PWM逆变器、谐振电容器、工作在低频的感应旋转变压器和压电致动器的电力电子结构。系统的行为分析了变压器耦合系数和谐振电容值的变化。然后，提出了一种优化工具，其中在电气性能和体积方面对系统的磁和功率特性进行了优化。显示了一个嵌入式无源电子系统，它为执行器创建了强制直流偏移。使用原型获得的实验结果被曝光并与模拟进行比较。基于这些结果，研究了具有次级准谐振拓扑的新版本，既可以减小变压器的尺寸，又可以降低全局效率。