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Prediction of Far-field Electromagnetic Radiated Emissions from AC/DC Telecommunication Power Supply Module
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Weixin WANG, Junhua SHU, Ningning SUI, Junping HE
Journal of Power Supply | 2024, 22(5) : 44 - 51
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Journal of Power Supply | 2024, 22(5): 44-51
• Special Issue on Electromagnetic Compatibility in Power Electronic Systems •
Prediction of Far-field Electromagnetic Radiated Emissions from AC/DC Telecommunication Power Supply Module
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Weixin WANG, Junhua SHU, Ningning SUI, Junping HE
Affiliations
  • School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen 518055 China
Published: 2024-09-30 doi: 10.13234/j.issn.2095-2805.2024.5.44
Outline
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The electromagnetic radiation emitted by an AC/DC telecommunication power supply is prone to exceeding the limit standards, so the researches on its electromagnetic radiation mechanism and prediction methods can improve the corresponding electromagnetic compatibility (EMC) design. First, after the analysis of the source and propagation path of common-mode(CM) electromagnetic interference in an AC/DC telecommunication power supply module, it is suggested that its far-field electromagnetic radiation can be decomposed into two types, which are driven by input-port and output-port CM voltages, respectively. Then, a novel method of far-field electromagnetic radiation prediction is proposed by combining the CM voltage-driven sources with the radiation transfer functions of parasitic radiators. The spectrum measurement of each CM voltage-driven source is realized by designing a spectrum analyzer and a resistor attenuator, and the radiation transfer functions of each parasitic radiator is numerically calculated using an electromagnetic simulation software FEKO. Finally, the radiation prediction of a 4 kW AC/DC telecommunication power supply module was achieved, and the effectiveness of the proposed prediction method was verified by test results.

AC/DC telecommunication power supply  /  far-field radiated emission  /  electromagnetic prediction  /  electromagnetic simulation  /  parasitic radiator
Weixin WANG, Junhua SHU, Ningning SUI, Junping HE. Prediction of Far-field Electromagnetic Radiated Emissions from AC/DC Telecommunication Power Supply Module[J]. Journal of Power Supply, 2024 , 22 (5) : 44 -51 . DOI: 10.13234/j.issn.2095-2805.2024.5.44
Funding
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  • National Natural Science Foundation of China(52077046)
  • Shenzhen Science and Technology Innovation Commission Science and Technology Tackling Plan Project(JSGG20201201100406017)
Appendix
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Year 2024 volume 22 Issue 5
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.5.44
  • Receive Date：2024-04-01
  • Online Date：2025-07-20
  • Published：2024-09-30
Article Data
Affiliations
History
  • Received：2024-04-01
  • Revised：2024-07-30
  • Accepted：2024-08-11
Funding
National Natural Science Foundation of China(52077046)
Shenzhen Science and Technology Innovation Commission Science and Technology Tackling Plan Project(JSGG20201201100406017)
Affiliations
    School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen 518055 China
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