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Aiming at the different demands of loads for constant current (CC) and constant voltage (CV) in wireless energy transmission systems, this paper proposes a dual-frequency switching-based LCL-LCC/LCL-S composite resonant network control strategy. The system uses the LCL-LCC resonant network at 120 kHz frequency to realize CC output and the LCL-S resonant network at 79kHz frequency to realize CV output. When the load voltage reaches 38V, the system automatically switches the operating frequency and topology to realize the smooth transition from CC to CV. Simulation results show that the system is able to realize a stable output of 3.3A/38V, and both achieve more than 90% efficiency. The control strategy can effectively realize accurate control of load voltage and fast and stable switching between CC and CV modes, which provides a flexible and efficient energy transmission solution for wireless energy transmission system.

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Wireless Charging with Constant-Current and Constant-Voltage Output Based on Dual-Frequency Switching Composite Resonant Network

  • 会议论文

  • 发表日期：

    2026年

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  • Zhaodong Li,
  • Hen Guo,
  • Haitao Yu,
  • Ranran Liu,
  • Hailong Zhang,
  • Min Zhang,
  • Yanbing Tian,
  • Chuanwang Song

摘要

Aiming at the different demands of loads for constant current (CC) and constant voltage (CV) in wireless energy transmission systems, this paper proposes a dual-frequency switching-based LCL-LCC/LCL-S composite resonant network control strategy. The system uses the LCL-LCC resonant network at 120 kHz frequency to realize CC output and the LCL-S resonant network at 79kHz frequency to realize CV output. When the load voltage reaches 38V, the system automatically switches the operating frequency and topology to realize the smooth transition from CC to CV. Simulation results show that the system is able to realize a stable output of 3.3A/38V, and both achieve more than 90% efficiency. The control strategy can effectively realize accurate control of load voltage and fast and stable switching between CC and CV modes, which provides a flexible and efficient energy transmission solution for wireless energy transmission system.