Combining diagonal connection and cancellation turn in electromagnetic interference filtering

Author

Kostov, Konstantin S. ; Nee, H.-P.

Author_Institution

Dept. of Electr. Energy Conversion, KTH R. Inst. of Technol., Stockholm, Sweden

Volume

7

Issue

3

fYear

2014

fDate

Mar-14

Firstpage

559

Lastpage

566

Abstract

In this study, a new printed circuit board (PCB) implementation of the diagonal connection is proposed. The two capacitors that are connected diagonally are laid out as close as possible and in such a way that their currents have opposite directions. The new layout combines the benefits of the so-called `cancellation turn´ with the benefits of the diagonal connection, without the need for additional PCB space and components. The experimental results show that the self-resonant frequency of the diagonally connected capacitors increased by 32%. Additionally, the coupling between the diagonally connected capacitors and a capacitor on the other side of the filter was reduced by 20-25 dB.

Keywords

electromagnetic interference; interference suppression; passive filters; power filters; printed circuits; PCB component; PCB implementation; PCB space; cancellation turn; capacitors; diagonal connection; electromagnetic interference filtering; gain 20 dB to 25 dB; passive power filters; printed-circuit-board implementation; self-resonant frequency;

fLanguage

English

Journal_Title

Power Electronics, IET

Publisher

iet

ISSN

1755-4535

Type

jour

DOI

10.1049/iet-pel.2013.0167

Filename

6759698