Aiming at the coil offset of magnetic coupling wireless power transmission (WPT) system with the Series–Series (SS) resonance structure, in order to stabilize the transmission efficiency above 80% according to SAE J2954, Control method and variable topology design with the maximum lateral offset of 20 cm are researched on. In this paper, the mutual inductance theory is adopted to establish an equivalent circuit model of the system. The expressions of the transmission characteristics with coil offset are derived and the influence of coil offset on transmission characteristics is analyzed. According to the difference offsets, a bilateral control method with phase-shift control on primary side and double closed-loop control on secondary side for small offset (0, 10 cm) for constant voltage output at 200 V is adopted. In addition, a double-sided LCC topology structure is developed for larger offset (10, 20 cm) with the maximum efficiency transmission method by parameter configuration. The simulation platform and the experiment platform are developed and the output characteristic experiments with different loads and different coupling coefficients under different offsets are finished to verify the results and provide a reference for the anti-offset research of the system. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

---

线圈偏置无线电力传输系统控制方法及变拓扑设计研究

针对串联-串联（SS）谐振结构的磁耦合无线电力传输（WPT）系统的线圈偏移，为了根据SAE J2954将传输效率稳定在80%以上，控制方法和可变拓扑设计最大研究了 20 厘米的横向偏移。本文采用互感理论建立系统的等效电路模型。推导了带有线圈偏移的传输特性表达式，分析了线圈偏移对传输特性的影响。根据偏移的不同，采用原边移相控制，副边双闭环控制的双边控制方法，实现小偏移（0, 10 cm），实现200 V恒压输出。此外，采用参数配置的最大效率传输方法，针对较大偏移（10、20 cm）开发了双面LCC拓扑结构。开发了仿真平台和实验平台，完成了不同负载、不同耦合系数在不同偏置下的输出特性实验，验证了结果，为系统的抗偏置研究提供了参考。© 2022 日本电气工程师学会。由 Wiley Periodicals LLC 出版。开发了仿真平台和实验平台，完成了不同负载、不同耦合系数在不同偏置下的输出特性实验，验证了结果，为系统的抗偏置研究提供了参考。© 2022 日本电气工程师学会。由 Wiley Periodicals LLC 出版。开发了仿真平台和实验平台，完成了不同负载、不同耦合系数在不同偏置下的输出特性实验，验证了结果，为系统的抗偏置研究提供了参考。© 2022 日本电气工程师学会。由 Wiley Periodicals LLC 出版。