An improved design of a dc-dc converter using an integrated magnetic component

This paper presents a detailed analysis of an integrated magnetic structure. A generalized analytical designing formula of an integrated magnetic component is introduced. An improved numerical method is applied to estimate the proximity losses due to currents waveforms in an integrated magnetic half-bridge dc/dc converter, which are not sinusoidal. This method is based on the homogenizing of the electric conductors with a complex permeability. This improved method of homogenizing Litz wires is applied to an integrated structure using finite elements software. Computer simulation results are presented for 1 kW, 48-V integrated current-doubler rectifier. A prototype has been implemented and tested. Experimental results confirm the theoretical study and simulation

[1]  Y. Lembeye,et al.  Integrated planar L-C-T component: Design,Characterization and Experimental Efficiency analysis , 2005, IEEE Transactions on Power Electronics.

[2]  B. Lehman,et al.  Integrated magnetic full wave converter with flexible output inductor , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[3]  Peng,et al.  A New Efficient High Frequency Rectifier Circuit , 1991 .

[4]  G. Hua,et al.  Design of high efficiency, low profile, low voltage converter with integrated magnetics , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[5]  Jian Sun,et al.  Integrated magnetics for current-doubler rectifiers , 2004, IEEE Transactions on Power Electronics.

[6]  Alberto Reatti,et al.  Solid and Litz-wire winding non-linear resistance comparison , 2000, Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems (Cat.No.CH37144).

[7]  Ernest Matagne,et al.  Modélisation magnétique macroscopique des faisceaux de conducteurs , 1993 .

[8]  Peng Xu,et al.  A novel integrated current doubler rectifier , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[9]  C.R. Sullivan,et al.  An Equivalent Complex Permeability Model for Litz-Wire Windings , 2009, IEEE Transactions on Industry Applications.