Title :
Reduction of EMI in planar transformers by charge balancing
Author :
Hofsajer, I.W. ; Fricker, K. ; Crosato, M.O.
Author_Institution :
Dept. of Electr. & Electron. Eng., Rand Afrikaans Univ., Auckland Park, South Africa
fDate :
12/5/2002 12:00:00 AM
Abstract :
A simple method of reducing the common-mode electromagnetic interference (EMI) of a switching circuit employing a planar wound transformer is presented. The method is based on the concept of charge balance being maintained within the transformer during a switching event. Charge balance is ensured by means of a compensating planar shield winding.
Keywords :
electromagnetic interference; electromagnetic shielding; switched mode power supplies; transformer windings; EMI; charge balance; charge balancing; common-mode electromagnetic interference; planar shield winding; planar transformers; switching event; wound transformer;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20021159
