Title :
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
fDate :
5/1/1994 12:00:00 AM
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;
Journal_Title :
Power Electronics, IEEE Transactions on
