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In the domain of oil field inspection device charging, wireless power transfer (WPT) technology offers a unique method compared to wired alternatives. Nonetheless, it faces interoperability challenges due to the variety of inspection devices. Moreover, lithium batteries within WPT systems require both constant current (CC) and constant voltage (CV) charging in flammable, explosive environments to ensure safety. This paper presents a universal method based on the LCC-S topology where the same primary topology can achieve CC and CV charging for various inspection devices through frequency regulation. Furthermore, the proposed method reduces the input impedance angle without affecting the fundamental CC characteristics, thereby limiting reactive power to enable interoperability. To validate this method, the article constructs WPT charging experimental equipment to charge a drone and a quadruped robot. By regulating the frequency, the system achieves CC and CV charging and zero phase angle (ZPA) operation for the two inspection devices.

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A Novel Method of Interoperability for a WPT System in Oilfield Inspection by Regulating Frequency

  • 会议论文

  • 发表日期：

    2025年

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  • Li Ji,
  • Yilong Wang,
  • Ming Zhang,
  • Changgeng Du

摘要

In the domain of oil field inspection device charging, wireless power transfer (WPT) technology offers a unique method compared to wired alternatives. Nonetheless, it faces interoperability challenges due to the variety of inspection devices. Moreover, lithium batteries within WPT systems require both constant current (CC) and constant voltage (CV) charging in flammable, explosive environments to ensure safety. This paper presents a universal method based on the LCC-S topology where the same primary topology can achieve CC and CV charging for various inspection devices through frequency regulation. Furthermore, the proposed method reduces the input impedance angle without affecting the fundamental CC characteristics, thereby limiting reactive power to enable interoperability. To validate this method, the article constructs WPT charging experimental equipment to charge a drone and a quadruped robot. By regulating the frequency, the system achieves CC and CV charging and zero phase angle (ZPA) operation for the two inspection devices.