This paper proposes a secondary-side phase-shift-controlled rectification strategy for an LCC-S-type magnetic coupling-wireless power transfer (MC-WPT) system, aiming to address issues such as communication delay, low robustness, and the need for additional DC–DC converters in wireless charging systems with power regulation capability. An equivalent circuit model is established to derive the relationship between the phase-shift angle and the system’s output characteristics. A power regulation method is introduced to achieve constant current (CC) and constant voltage (CV) charging profiles. Simulation and experimental results verify that the system realizes CC and CV output under varying loads (from 8 Ω to 23 Ω), with output power ranging from 50 W to 110 W and a peak efficiency of 92%. The system maintains stable performance even under fluctuating coupling coefficients, demonstrating strong misalignment tolerance.

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Power Regulation Method of LCC-S MC-WPT System with Secondary Side Controlled Rectifier

  • Lin Yang,
  • Pengqi Deng,
  • Yi Huang,
  • Lang Kuang,
  • Zijiang Shang

摘要

This paper proposes a secondary-side phase-shift-controlled rectification strategy for an LCC-S-type magnetic coupling-wireless power transfer (MC-WPT) system, aiming to address issues such as communication delay, low robustness, and the need for additional DC–DC converters in wireless charging systems with power regulation capability. An equivalent circuit model is established to derive the relationship between the phase-shift angle and the system’s output characteristics. A power regulation method is introduced to achieve constant current (CC) and constant voltage (CV) charging profiles. Simulation and experimental results verify that the system realizes CC and CV output under varying loads (from 8 Ω to 23 Ω), with output power ranging from 50 W to 110 W and a peak efficiency of 92%. The system maintains stable performance even under fluctuating coupling coefficients, demonstrating strong misalignment tolerance.