Title page for etd-0810111-014325


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URN etd-0810111-014325
Author Chih-Feng Chao
Author's Email Address No Public.
Statistics This thesis had been viewed 5358 times. Download 2403 times.
Department Electrical Engineering
Year 2010
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Investigation on EMI of Self-Ballasted Fluorescent Lamps
Date of Defense 2011-06-10
Page Count 90
Keyword
  • self-excited electronic ballast
  • electromagnetic compatibility (EMC)
  • electromagnetic interference (EMI)
  • self-ballasted fluorescent lamps
  • Abstract According to the regulation announced by Bureau of Standard, Metrology & Inspection (BSMI) of Ministry of Economic Affairs (MOEA), lamp fixtures must follow safety and electromagnetic compatibility (EMC) standards. However, the self-ballasted fluorescent lamps in the fixture should only be approved by the safety test but not regulated by EMC standard. Obviously, fixtures without light bulbs do not generate any electromagnetic noise. Electromagnetic interference (EMI) comes from the fluorescent light bulb embedded with an electronic ballast which included an inverter with high-frequency switching. A variety of tests demonstrate evidently that a fixture with different self-ballasted compact fluorescent lamps may possibly violate the EMC standard, revealing the absurdity of the regulation. In fact, self-ballasted fluorescent lamps use mostly self-excited electronic ballasts. The operating frequencies for this kind of electronic ballasts can not be precisely controlled due to the influence of many factors. They are not operated at a specified frequency but in a frequency range. This means that the generated EMI spectrum is hardly predicted, especially when a fixture is fitted by light bulbs from several manufacturers. This research inducts the worst cases from numerous measurements on a fixture with 1 piece to 8 pieces of light bulbs, and then attempts to design an EMI filter for all cases. As a result, a lamp fixture with the filter at the line input terminal can suppress the EMI. As long as the consumer buys the lamp fixture which are installed with the EMI filter together with any bulb in use, EMI noise can comply with standard limits.
    Advisory Committee
  • Jiann-Fuh Chen - chair
  • Tzung-Lin Lee - co-chair
  • Chih-Chiang Hua - co-chair
  • Kong-Soon NG - co-chair
  • Chin-Sien Moo - advisor
  • Files
  • etd-0810111-014325.pdf
  • Indicate in-campus at 1 year and off-campus access at 1 year.
    Date of Submission 2011-08-10

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