보드 선도를 이용한 LLC 컨버터의 경 부하 레귤레이션 특징 분석 Analysis for Light Load Regulation of LLC Converter using Bode Plot

In general, LLC converters show great promise in applications that require high efficiency, especially under light load conditions. In particular, LLC converters feature wide gain capability with pulse-frequency modulation and zero voltage switching over entire load conditions. However, output voltage increases in light load conditions. In this study, Bode plot and impedance asymptotes analyses were conducted to obtain insights into the regulation characteristics of LLC converters under light load conditions. To improve the regulation characteristic of LLC converters, a new resonant tank with an additional capacitor is proposed. The design guideline for the proposed LLC converter is determined by the Bode plot and impedance asymptotes analyses. Therefore, the proposed LLC converter achieves the light load regulation while maintaining the advantages of typical LLC converters.
Publisher
전력전자학회
Issue Date
2016-12
Language
Korean
Keywords

LLC converter; Light load regulation; Parasitic components; ZVS(Zero-Voltage-Switching); Bode plot; Impedance asymptotes

Citation

전력전자학회 논문지, v.21, no.6, pp.506 - 513

ISSN
1229-2214
DOI
10.6113/TKPE.2016.21.6.506
URI
http://hdl.handle.net/10203/223154
Appears in Collection
EE-Journal Papers(저널논문)
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