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A novel contactless, feedbackless and sensorless power delivery link to electromagnetic levitation melting system residing in sealed compartment

Author

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  • Darhovsky, Yegal
  • Mellincovsky, Martin
  • Baimel, Dmitry
  • Kuperman, Alon

Abstract

The paper presents practical considerations and guidelines for designing an improved-efficiency contactless inductive power transfer link, delivering DC power in step-down mode to an electromagnetic levitation melting system residing in a sealed compartment. The proposed arrangement employs none-series compensated inductive power transfer link operating at the so-called “load-independent-voltage-output” frequency, allowing feedback-less and sensor-less design. However, the output voltage of a system operating at such frequency remains influenced by the load to some extent, residing within a certain range with boundary values (minimum and maximum) corresponding to maximum (rated) and minimum load, respectively. Consequently, the proposed contactless power delivery system is first analyzed using both first harmonic approximation (frequency-domain) based approach and differential equations (time-domain) based method to obtain corresponding output voltage bounds. Then, coil-to-coil efficiency and optimal load matching factor are determined. Comparison with both typically utilized symmetrical series-series and recently proposed series-none compensation topologies reveals the superiority of none-series compensation topology in terms of coil-to-coil efficiency for the whole range of coupling coefficients. Simulations and experiments of 400 V, 1 kW none-to-series compensated inductive wireless power transfer link, delivering contactless energy to a 250 V electromagnetic levitation melting system, demonstrate excellent matching and accurately validate the presented analysis.

Suggested Citation

  • Darhovsky, Yegal & Mellincovsky, Martin & Baimel, Dmitry & Kuperman, Alon, 2021. "A novel contactless, feedbackless and sensorless power delivery link to electromagnetic levitation melting system residing in sealed compartment," Energy, Elsevier, vol. 231(C).
    • Handle: RePEc:eee:energy:v:231:y:2021:i:c:s0360544221010379
    DOI: 10.1016/j.energy.2021.120789
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    References listed on IDEAS

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    Cited by:

    1. Vulfovich, A. & Kolesnik, S. & Baimel, D. & Gutman, M. & Geftler, A. & Kuperman, A., 2022. "Output characteristics modeling and experimental verification of secondary-uncompensated inductive power delivery link operating without feedback," Energy, Elsevier, vol. 252(C).
    2. Vulfovich, Andrey & Kuperman, Alon, 2024. "Extending the design space of minimized VA rating inductive wireless power transfer links operating in restricted sub-resonant frequency region with constant current output," Energy, Elsevier, vol. 310(C).
    3. Vulfovich, Andrey & Sitbon, Moshe & Kuperman, Alon, 2025. "Strongly-coupled high-voltage-gain inductive wireless power transfer link employing identical coils for feedback-less energy delivery into enclosed compartment," Energy, Elsevier, vol. 332(C).
    4. Wu, Jingchi & Meng, Linghui & Deng, Yuhao & Liu, Siyang & Zhou, Youshong & Yang, Jiangpeng & Nie, Jianglin & Lu, Ke & Shu, Zeliang, 2025. "A communication-free control strategy for dual-channel WPT with wide ZVS range: Design and experimental validation," Energy, Elsevier, vol. 339(C).
    5. Vulfovich, Andrey & Kuperman, Alon, 2024. "Extending the lower bound of attainable load-independent voltage gain values range in contactless, feedbackless and sensorless power delivery links," Energy, Elsevier, vol. 293(C).

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