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Electric Vehicles (EVs) promise sustainable mobility, yet plug-in charging introduces safety risks, mechanical wear, and user inconvenience. Wireless Power Transfer (WPT) can overcome these limitations, but real-world adoption is slowed by efficiency losses from misalignment, detuning, and installation costs. Unlike prior studies that primarily offer reviews or simulations, this work presents a prototype-oriented design developed at Rauran Charge and evaluated through detailed simulations. The novelty of our approach lies in two oscillation-based robustness strategies: mechanical micro-oscillation and electrical frequency modulation, which mitigate misalignment sensitivity and extend efficient transfer beyond conventional limits. By optimizing coil geometry, Litz-wire selection, and compensation topology, the system achieves efficiencies exceeding 94% at coil separations up to 25 cm, surpassing typical IPT systems. The paper provides not only governing equations and simulation validation but also design notes for practical hardware realization, positioning this contribution as a reference for advancing wireless EV charging toward scalable deployment.

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System Design Methodology and Efficiency Optimization of Wireless Charging for Electric Vehicles

  • 会议论文

  • 发表日期：

    2026年

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  • Raunak Varma,
  • Sakshi Shringi,
  • Ranveer Singh Pilania,
  • Shikha Mundra

摘要

Electric Vehicles (EVs) promise sustainable mobility, yet plug-in charging introduces safety risks, mechanical wear, and user inconvenience. Wireless Power Transfer (WPT) can overcome these limitations, but real-world adoption is slowed by efficiency losses from misalignment, detuning, and installation costs. Unlike prior studies that primarily offer reviews or simulations, this work presents a prototype-oriented design developed at Rauran Charge and evaluated through detailed simulations. The novelty of our approach lies in two oscillation-based robustness strategies: mechanical micro-oscillation and electrical frequency modulation, which mitigate misalignment sensitivity and extend efficient transfer beyond conventional limits. By optimizing coil geometry, Litz-wire selection, and compensation topology, the system achieves efficiencies exceeding 94% at coil separations up to 25 cm, surpassing typical IPT systems. The paper provides not only governing equations and simulation validation but also design notes for practical hardware realization, positioning this contribution as a reference for advancing wireless EV charging toward scalable deployment.