Analysis and Design of a Magnetically Integrated Planar Transformer Adapted to CLLLC Converter

In the future, high power density and planarization will still be the development directions of power electronic converters. The key to increasing power density lies in magnetic components. As an excellent bidirectional converter, the CLLLC resonant converter has three magnetic elements, making it d...

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Bibliographic Details
Published in:IEEE International Conference on Industrial Technology (Online) pp. 1 - 6
Main Authors: Zhao, Yifan, Liu, Boyu, Zhang, Xiangjun, Guan, Yueshi, Wang, Yijie, Xu, Dianguo
Format: Conference Proceeding
Language:English
Published: IEEE 26.03.2025
Subjects:
CLLLC Resonant Converter
Density measurement
Inductance
Magnetic analysis
Magnetic Integration
Magnetic resonance
Planar Transformer
Power electronics
Power system measurements
Prototypes
Resonant converters
Transformers
Windings
ISSN:2643-2978
Online Access:Get full text
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Summary:In the future, high power density and planarization will still be the development directions of power electronic converters. The key to increasing power density lies in magnetic components. As an excellent bidirectional converter, the CLLLC resonant converter has three magnetic elements, making it difficult to improve its power density. This paper introduces a planar transformer with asymmetrically distributed windings. By adjusting the winding distribution, a controllable leakage inductance is obtained, which replaces the original resonant inductance and significantly reduces the volume of the converter. Moreover, the PCB winding method adopted in this paper reduces the number of layers of the original PCB board by half, greatly cutting the cost. A 500W prototype is built to verify the proposed magnetically integrated transformer.
ISSN:2643-2978
DOI:10.1109/ICIT63637.2025.10965230