Determination of Winding Losses of Low-Profile Planar-Type Transformer

Issue		J. Phys. IV France Volume 07, Number C1, Mars 1997 7th INTERNATIONAL CONFERENCE ON FERRITES


Page(s)		C1-143 - C1-144
DOI		http://dx.doi.org/10.1051/jp4:1997149

7th INTERNATIONAL CONFERENCE ON FERRITES

J. Phys. IV France 07 (1997) C1-143-C1-144
DOI: 10.1051/jp4:1997149

Determination of Winding Losses of Low-Profile Planar-Type Transformer

C.F. Foo and X.H. Gong

School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798

Abstract
At high frequency, the winding losses of power transformer due to skin and proximity effects becomes a significant component in the loss calculation of the transformer efficiency. This paper examines the winding losses associated with these effects for planar-type low-profile transformers that are suitable for high frequency high density soft switching power supply application. The transformer winding ac resistance and leakage inductance are investigated for the different winding arrangements. 2D and 3D Finite-element methods are used to study the magnetic flux distribution in the transformer window area and the current density distribution in the winding conductors.

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