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Research on Digital Contactless Load Measurement Based on Characteristic Parameters in Transient Process
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Zhengbin ZHU1, Jun HUANG2, Jianfeng NIU1, Yangyang MENG1, Sideng HU1
Journal of Power Supply | 2024, 22(1) : 222 - 228
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Journal of Power Supply | 2024, 22(1): 222-228
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Research on Digital Contactless Load Measurement Based on Characteristic Parameters in Transient Process
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Zhengbin ZHU1, Jun HUANG2, Jianfeng NIU1, Yangyang MENG1, Sideng HU1
Affiliations
  • 1 College of Electrical Engineering Zhejiang University Hangzhou 310000 China
  • 2 Shanghai Institute of Space Power Sources Shanghai 201109 China
Published: 2024-01-30 doi: 10.13234/j.issn.2095-2805.2024.1.222
Outline
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The problem of high-order nonlinearity in the transient process of a wireless power transmission system is a difficulty in load measurement and identification. When dealing with beat-frequency signals due to the high-order nonlinearity, there are some problems in the existing analog envelope detection method, such as signal distortion, poor circuit flexibility, and limited measurement range. Aimed at these problems, a digital envelope detection method was proposed based on Hilbert transform, and a digital envelope detector was designed to extract the envelope of the voltage beat-frequency signal. In addition, simulations and experiments were conducted to validate the proposed method. Results show that this method can accurately extract the envelope of the voltage beat-frequency signal with different loads, and it achieved an error of less than 5% in the load resistance range of 1-2 000 Ω. The proposed method extends the contactless load measurement range based on characteristic parameters in the transient process, providing a new idea for measuring the internal resistance of batteries in aircraft such as unmanned aerial vehicles.

Wireless power transmission  /  load measurement and identification  /  Hilbert transform  /  digital envelope detection
Zhengbin ZHU, Jun HUANG, Jianfeng NIU, Yangyang MENG, Sideng HU. Research on Digital Contactless Load Measurement Based on Characteristic Parameters in Transient Process[J]. Journal of Power Supply, 2024 , 22 (1) : 222 -228 . DOI: 10.13234/j.issn.2095-2805.2024.1.222
Funding
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  • Shanghai Aerospace Science and Technology Innovation Fund(SAST2017-136)
  • Fundamental Research Funds for the Central Universities(2020XZZX005-02)
Appendix
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Year 2024 volume 22 Issue 1
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318
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.1.222
  • Receive Date：2021-05-06
  • Online Date：2025-07-21
  • Published：2024-01-30
Article Data
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History
  • Received：2021-05-06
  • Revised：2021-06-05
  • Accepted：2021-06-09
Funding
Shanghai Aerospace Science and Technology Innovation Fund(SAST2017-136)
Fundamental Research Funds for the Central Universities(2020XZZX005-02)
Affiliations
    1 College of Electrical Engineering Zhejiang University Hangzhou 310000 China
    2 Shanghai Institute of Space Power Sources Shanghai 201109 China
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https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2024.1.222
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