High Frequency LLC Resonant Converter with Magnetic Shunt Integrated Planar Transformer

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedings – Annual report year: 2018Researchpeer-review

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High Frequency LLC requires a smaller resonant inductance which is usually implemented by transformer leakage inductance. However, this small resonant inductance is difficult to deal with a wide input voltage range. This paper proposes a new method to implement a larger resonant inductance by using a magnetic shunt integrated into planar transformer. The switching frequency can be greatly narrowed by designing a smaller inductance ratio of magnetizing inductance to resonant inductance. Since this method can well deal with a wide input voltage range without adding extra inductor and increasing the size of the transformer, the power density can be improved. The precise leakage inductance calculation method for this transformer and detailed LLC converter design procedure are presented. A 280-380V and 48V-100W half bridge LLC resonant converter
with 1 MHz resonant frequency is built to verify the design methodology.
Original languageEnglish
Title of host publicationProceedings of IEEE Applied Power Electronics Conference and Exposition
Publication date2018
ISBN (Print)978-1-5386-1180-7
Publication statusPublished - 2018
Event2018 IEEE Applied Power Electronics Conference and Exposition - Henry B. Gonzalez Convention Center, San Antonio, United States
Duration: 4 Mar 20188 Mar 2018


Conference2018 IEEE Applied Power Electronics Conference and Exposition
LocationHenry B. Gonzalez Convention Center
CountryUnited States
CitySan Antonio

    Research areas

  • Magnetic shunt, LLC resonant converter, Planar transformer, Narrowed swithing frequency

ID: 146423520