Volume 43 Issue 1
Jan.  2023
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Article Navigation >  Chinese Journal of Space Science  > 2023  >  43(1): 183-189 Open Access
ZHOU Li, MA Xiaoyong, WU Lin, YAN Jingye, AN Junshe. Electromagnetic Interference Suppression Technology for Switching Converters of Onboard Secondary Power Supply (in Chinese). Chinese Journal of Space Science, 2023, 43(1): 183-189 doi: 10.11728/cjss2023.01.210922100
Citation: ZHOU Li, MA Xiaoyong, WU Lin, YAN Jingye, AN Junshe. Electromagnetic Interference Suppression Technology for Switching Converters of Onboard Secondary Power Supply (in Chinese). Chinese Journal of Space Science, 2023, 43(1): 183-189 doi: 10.11728/cjss2023.01.210922100
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Electromagnetic Interference Suppression Technology for Switching Converters of Onboard Secondary Power Supply

doi: 10.11728/cjss2023.01.210922100 cstr: 32142.14.cjss2023.01.210922100

  • National Space Science Center, Chinese Academy of Sciences, Beijing 100190

  • Received Date: 2021-11-12
  • Accepted Date: 2022-03-15
  • Rev Recd Date: 2022-04-29
    • Available Online: 2023-02-03
    Abstract
  • Electromagnetic Interference (EMI) suppression technology is an important technology to ensure that all spacecraft functional units can work normally together. The EMI in spacecraft comes mostly from the switching converters, DC/DC and the point-of-load POL. Ground tests for the EMI characteristics of the onboard switching converters are conducted. Based on the test results, an electromagnetic interference suppression design for the onboard power supply system is proposed, in which the hardware consists a highly stable crystal oscillator, a controller, a clock programmable buffer and some clock drivers, to provide a highly stable external synchronization clock for the switching converters. Meanwhile, the software design to realize a stable clock and power-on sequence control are introduced. All DC/DC and POL are working in the synchronization mode, in which the switching clocks are from external clock drivers. Finally, the feasibility and effectiveness of the EMI suppression design is verified by the method of measuring the output voltage spectrum.

     

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    • References(10)
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