Magnetic Materials and Components
Technical Lecture Session
Magnetics and Passive Components
This paper presents a 3D planar transformer winding structure. The proposed winding structure can achieve low AC resistance without multiple interleaving between primary and secondary winding. The parasitic capacitance between primary side and secondary side can be significantly reduced by applying the proposed structure. The proposed 3D winding structure are applied to a 3.2 kW 500 kHz LLC resonant converter and high efficiency are demonstrated.