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access icon free Constant frequency control of LLC resonant converter using switched capacitor

© The Institution of Engineering and Technology
Received 17/08/2013, Published

A constant frequency control of an LLC resonant converter is presented. A switched capacitor is introduced to change the resonant capacitance, which enables the control of the voltage gain at a fixed switching frequency. The operation principle of the proposed converter with a switched capacitor is discussed. The experimental results are provided to show the validity of the proposed method.

Inspec keywords: resonant power convertors; frequency control; switching convertors; capacitors; capacitor switching

Other keywords: constant frequency control; switched capacitor; switching frequency; voltage gain; LLC resonant converter; resonant capacitance

Subjects: Frequency control; Control of electric power systems; Capacitors; Power electronics, supply and supervisory circuits

References

    1. 1)
      • 3. Ye, Y., Yan, C., Zeng, J., Ying, J.: ‘A novel light load solution for LLC series resonant converter’. IEEE INTELEC 2007, Rome, Italy, 2007, pp. 61–65.
    2. 2)
      • 2. Hu, Z., Qiu, Y., Wang, L., Liu, Y.: ‘An interleaved LLC resonant converter operating at constant switching frequency’. IEEE ECCE 2012, Raleigh, USA, 2012, pp. 3541–3548.
    3. 3)
      • 1. Yang, B., Lee, F.C., Zhang, A.J., Huang, G.: ‘LLC resonant converter for front end DC/DC conversion’. IEEE APEC 2002, Dallas, USA, 2002, pp. 1108–1112.
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2013.2725
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