A low-profile power converter using printed-circuit board (PCB) power transformer with ferrite polymer composite

Author

Tang, S.C. ; Hui, S. Y Ron ; Chung, Henry Shu-Hung

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China

Volume

16

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

493

Lastpage

498

Abstract

A new design of low-cost and low-profile power transformer is presented in this paper. The manufacturing cost of a power transformer can be reduced using the proposed printed-circuit board (PCB) transformer. The transformer windings are etched on the opposite sides of a double-sided PCB. Self-adhesive ferrite polymer composite (FPC) sheets are stuck on the two PCB surfaces to shield the magnetic flux induced from the transformer windings. The PCB transformer does not require manual winding and bobbin. A power converter prototype employing the PCB transformer has been implemented. The technique of choosing the optimum switching frequency of the power converter using the PCB transformer is addressed in this paper. The maximum power delivered from the prototype is 94 W. The maximum efficiency of the power converter is 83.5%

Keywords

DC-DC power convertors; composite materials; ferrites; magnetic flux; magnetic shielding; polymers; power transformers; printed circuits; switching circuits; transformer windings; 83.5 percent; 94 W; PCB power transformer; double-sided PCB; ferrite polymer composite; low-profile power converter; magnetic flux shielding; manufacturing cost reduction; optimum switching frequency; printed-circuit board; transformer windings; Costs; Etching; Ferrites; Flexible printed circuits; Magnetic flux; Manufacturing; Polymers; Power transformers; Prototypes; Windings;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.931055

Filename

931055