IEEE Access (Jan 2024)

A Novel Optimization Method of Compensation Network Parameters for LCC Topology Wireless Power Transfer System With Anti-Offset Characteristics

  • Yang Lu,
  • Dongyuan Ge,
  • Lian Meng,
  • Chuan Sun,
  • Qi Tang,
  • Yilin Gao,
  • Mengmeng Chen,
  • Chenyang Xia

DOI
https://doi.org/10.1109/ACCESS.2023.3347738
Journal volume & issue
Vol. 12
pp. 5960 – 5972

Abstract

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For the coil misalignment problem in the charging process of automatic guidance vehicles (AGVs), this paper proposes an optimization method for the bilateral LCC compensation network parameters based on quadruple-D quadrature (4DQ) coils. By introducing two coefficients $K_{\text {T}}$ and $K_{\text {f1}}$ , the compensation capacitors $C_{\text {T}}$ and $C_{\text {f1}}$ are optimized, achieving smaller output power fluctuations. Firstly, the capacitor values $C_{\text {T}}$ and $C_{\text {f1}}$ at resonance in the SS and PS equivalent circuit topology are obtained, meanwhile, the relationship between the output power $P_{\text {out}}$ and the coupling coefficient $k$ , represented by the coefficients $K_{\text {T}}$ and $K_{\text {f1}}$ , is obtained. Furthermore, with the transmission efficiency as the limiting condition, the output power fluctuation is effectively suppressed by adjusting $K_{\text {T}}$ and $K_{\text {f1}}$ . Finally, the experimental results show that after optimization the output power is 427.08W, and the transmission efficiency is 93.506% when the coupling coil are aligned, the system can still maintain a power output of at least 382.36W with a coil offset of 0-153mm in the X/Y axis directions, and the transmission efficiency is always above 89.472%. At the same time, the maximum deviation value $\Delta P_{{\text {abs}\_{}\text{max}}}$ decreased from 213.1W before optimization to 111.0W after optimization, a decrease of 47.91%, effectively suppressing the power fluctuation and improving anti-offset performance.

Keywords