Viability of active EMI filters for utility applications

Author

Farkas, Thomas ; Schlecht, Martin F.

Author_Institution

Lab. for Electr. & Electromagn. Syst., MIT, Cambridge, MA, USA

Volume

9

Issue

3

fYear

1994

fDate

5/1/1994 12:00:00 AM

Firstpage

328

Lastpage

337

Abstract

The application of active circuitry to increase the performance per size and cost of utility-side EMI filters is considered. The major problems are power line frequency (60 Hz) rejection and the compensation of the feedback loop, which is influenced by the wide-ranging utility impedance. While analysis and simulations show that these problems prevent the practical application of active filtering to power supplies switching at around 75 kHz, results at 450 kHz demonstrate potential for substantial improvement of EMI filters for switching frequencies of a few hundred kHz, although with the cost of a complex compensation

Keywords

active filters; compensation; electric impedance; electromagnetic interference; feedback; power supplies to apparatus; switched mode power supplies; switching circuits; 450 kHz; 60 Hz; 75 kHz; active EMI filters; feedback loop compensation; impedance; power line frequency rejection; power supplies; switching; utility applications; Active filters; Analytical models; Circuit simulation; Costs; Electromagnetic interference; Feedback loop; Filtering; Frequency; Impedance; Power filters;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.311266

Filename

311266