A new wideband common-mode noise filter consisting of Mn-Zn ferrite core and copper/polyimide tape wound coil

Author

Yanagisawa, Koichi ; Zhang, Fuchun ; Sato, Toshiro ; Yamasawa, Kiyohito ; Miura, Yoshimasa

Author_Institution

Dev. Dept., Hioki Electr. Corp., Ueda, Japan

Volume

41

Issue

10

fYear

2005

Firstpage

3571

Lastpage

3573

Abstract

A new wideband common-mode noise filter for switching power supplies has been developed. The filter consisted of an Mn-Zn ferrite core and a copper/polyimide tape wound coil. The tape wound coil had two signal lines, two ground lines, and a polyimide dielectric film. The filter exhibited a common-mode rejection of over 30 dB in the wide frequency range of 100 kHz to 100 MHz. The wideband common-mode filtering was due to the high-frequency magnetic loss of the Mn-Zn ferrite core and the optimum ground point selection for the ground lines.

Keywords

ferrite filters; interference suppression; magnetic shielding; manganese alloys; switched mode power supplies; zinc alloys; 0.1 to 100 MHz; Mn-Zn; common mode rejection; ferrite core; polyimide dielectric film; switching power supply; tape wound coil; wideband common mode noise filter; Coils; Copper; Dielectric films; Ferrites; Magnetic separation; Polyimides; Power filters; Power supplies; Wideband; Wounds; Common-mode noise; Mn–Zn ferrite core; filter; ground point; magnetic coupling; switching power supply;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.855189

Filename

1519373