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Implementation and Study of Constant-Frequency LLC Resonant Converter

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Intelligent Technologies and Engineering Systems

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 234))

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Abstract

This chapter presents an LLC resonant converter with constant frequency. Since LLC resonant converters possess the advantages of high efficiency and low electromagnetic interference, they are widely used in many applications. However, the EMI filter design becomes more complex because of the variable-frequency operation of LLC resonant converter. Therefore, in this chapter, a circuit configuration of a buck converter cascade an LLC resonant converter, buck-fed LLC resonant converter, is proposed to complete constant-frequency operation and simplify the EMI filter design. The buck converter is applied in the proposed converter as the input source for the LLC resonant converter. In addition, by adjusting the output voltage of the buck converter, the output regulation and constant-frequency operation of the proposed converter can be achieved. Finally, a prototype of the buck-fed LLC resonant converter with input voltage 380–400 V and output 24 V/10 A is implemented. The experimental results demonstrate the feasibility of the proposed converter.

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Author information

Authors and Affiliations

  1. Department of Electrical Engineering, National Changhua University of Education, Changhua, 50007, Taiwan

    Shi-Yi Lin & Yi-Nung Chung

  2. Department of Automation Engineering and Institute of Mechatronoptic Systems, Chienkuo Technology University, Changhua, 50007, Taiwan

    Shih-Kuen Changchien

  3. Department of Electrical Engineering, Chienkuo Technology University, Changhua, 50007, Taiwan

    Chien-Ming Hong

Authors
  1. Shi-Yi Lin
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  2. Shih-Kuen Changchien
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  3. Chien-Ming Hong
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  4. Yi-Nung Chung
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Corresponding author

Correspondence to Yi-Nung Chung .

Editor information

Editors and Affiliations

  1. School of Engineering, Mercer University, 151 Brookefield Drive, Macon, 31210, Georgia, USA

    Jengnan Juang

  2. National Changhua University of Educatio, No. 1, Jin De Road, Changhua City, 500, Taiwan R.O.C.

    Yi-Cheng Huang

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© 2013 Springer Science+Business Media New York

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Lin, SY., Changchien, SK., Hong, CM., Chung, YN. (2013). Implementation and Study of Constant-Frequency LLC Resonant Converter. In: Juang, J., Huang, YC. (eds) Intelligent Technologies and Engineering Systems. Lecture Notes in Electrical Engineering, vol 234. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-6747-2_75

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  • DOI: https://doi.org/10.1007/978-1-4614-6747-2_75

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  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4614-6746-5

  • Online ISBN: 978-1-4614-6747-2

  • eBook Packages: EngineeringEngineering (R0)

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