LAPSE:2019.0429
Published Article
LAPSE:2019.0429
Novel Frequency Swapping Technique for Conducted Electromagnetic Interference Suppression in Power Converter Applications
March 26, 2019
Quasi-resonant flyback (QRF) converters have been widely applied as the main circuit topology in power converters because of their low cost and high efficiency. Conventional QRF converters tend to generate higher average conducted electromagnetic interference (EMI) in the low-frequency domain due to the switching noise generated by power switches, resulting in the fact they can exceed the EMI standards of the European Standard 55022 Class-B emission requirements. The presented paper develops a novel frequency swapping control method that spreads spectral energy to reduce the amplitude of sub-harmonics, thereby lowering average conducted EMI in the low-frequency domain. The proposed method is implemented in a control chip, which requires no extra circuit components and adds zero cost. The proposed control method is verified using a 24 W QRF converter. Experimental results reveals that conducted EMI has been reduced by approximately 13.24 dBμV at 498 kHz compared with a control method without the novel frequency swapping technique. Thus, the proposed method can effectively improve the flyback system to easily meet the CISPR 22/EN55022 standards.
Record ID
Keywords
conduction electromagnetic interference (EMI), frequency jittering, frequency swapping, quasi-resonant flyback (QRF)
Subject
Suggested Citation
Kuo MT, Tsou MC. Novel Frequency Swapping Technique for Conducted Electromagnetic Interference Suppression in Power Converter Applications. (2019). LAPSE:2019.0429
Author Affiliations
Kuo MT: Department of Electrical Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, Da’an District, Taipei 106, Taiwan [ORCID]
Tsou MC: Leadtrend Technology Corporation, No. 1, Taiyuan 2nd St., Zhubei City, Hsinchu County 30288, Taiwan
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Tsou MC: Leadtrend Technology Corporation, No. 1, Taiyuan 2nd St., Zhubei City, Hsinchu County 30288, Taiwan
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Journal Name
Energies
Volume
10
Issue
1
Article Number
E24
Year
2016
Publication Date
2016-12-27
Published Version
ISSN
1996-1073
Version Comments
Original Submission
Other Meta
PII: en10010024, Publication Type: Journal Article
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Published Article
LAPSE:2019.0429
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External Link
doi:10.3390/en10010024
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Version History
[v1] (Original Submission)
Mar 26, 2019
Verified by curator on
Mar 26, 2019
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v1
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https://psecommunity.org/LAPSE:2019.0429
Original Submitter
Calvin Tsay
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