2013
DOI: 10.1049/el.2013.2725
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Constant frequency control of LLC resonant converter using switched capacitor

Abstract: 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.

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Cited by 32 publications
(9 citation statements)
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“…The conduction loss of synchronous rectifier can be calculated as: (12) where I s_rms can be expressed as [35] (13) When operating at its resonant frequency, the SR of LLC resonant converter exhibits ZCS; hence, the switching loss of SR is neglected.…”
Section: ) Losses Of the Synchronous Rectifier (Sr) S1 And S2mentioning
confidence: 99%
See 1 more Smart Citation
“…The conduction loss of synchronous rectifier can be calculated as: (12) where I s_rms can be expressed as [35] (13) When operating at its resonant frequency, the SR of LLC resonant converter exhibits ZCS; hence, the switching loss of SR is neglected.…”
Section: ) Losses Of the Synchronous Rectifier (Sr) S1 And S2mentioning
confidence: 99%
“…Generally, the optimal performance of an LLC resonant converter occurs when the switching frequency equals the resonant frequency [11]- [16]. However, this is difficult to achieve without adding mechanisms such as changes to the resonant tank parameters [12], [13] or modulation of the LLC resonant converter input voltage [14]- [16]. In addition, the LLC resonant converter relies on a frequency control mechanism to achieve voltage regulation.…”
Section: Introductionmentioning
confidence: 99%
“…Since the equivalent capacitance of SCC is proportional to the charge amount Q during a cycle [27], the derivation of equivalent capacitance is given as (1)…”
Section: Scc Operational Cycle Analysismentioning
confidence: 99%
“…To solve the above‐mentioned problems, many different approaches have been proposed. Generally, the existing solutions can be categorised into the following three groups: (i) accurate design methodologies [10–13]; (ii) hybrid modulation strategies [14–20]; (iii) modifications on traditional LLC topology [21–25] or topology morphing control strategy [26–29].…”
Section: Introductionmentioning
confidence: 99%