Viability of active EMI filters for utility applications

Author

Farkas, Thomas ; Schlecht, Martin F.

Author_Institution

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

fYear

1992

fDate

23-27 Feb 1992

Firstpage

803

Lastpage

813

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 kilohertz, although with the cost of a complex compensation

Keywords

active filters; electromagnetic interference; power cables; power systems; switching; 450 kHz; 60 Hz; 75 kHz; active EMI filters; feedback loop compensation; power line frequency rejection; power supplies; utility applications; Active filters; Analytical models; Circuit simulation; Costs; Electromagnetic interference; Feedback loop; Filtering; Frequency; Impedance; Power filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1992. APEC '92. Conference Proceedings 1992., Seventh Annual

Conference_Location

Boston, MA

Print_ISBN

0-7803-0485-3

Type

conf

DOI

10.1109/APEC.1992.228331

Filename

228331