Title :
Design and evaluation of a hybrid passive/active ripple filter with voltage injection
Author :
Chow, Albert C. ; Perreault, David J.
Author_Institution :
Lab. for Electromagn. & Electron. Syst., MIT, Cambridge, MA, USA
fDate :
4/1/2003 12:00:00 AM
Abstract :
Active ripple filters can substantially attenuate power converter ripple, allowing considerable reduction in passive filter component size. Investigated here is a hybrid passive/active filter topology that achieves ripple reduction by injecting a compensating voltage ripple across a series filter element. Both ripple feedforward and feedback are employed. The design of sensor, amplifier, and injector circuitry for this application is explored. The experimental results demonstrate the feasibility and high performance of the new approach, and illustrate its potential benefits. It is demonstrated that the proposed approach is most effective in cases where it is desirable to minimize the amount of capacitance in the filter.
Keywords :
active filters; capacitance; circuit feedback; compensation; feedforward; passive filters; power convertors; amplifier circuitry; capacitance; compensating voltage ripple; hybrid passive/active ripple filter; injector circuitry; passive filter component size; power converter ripple; ripple feedback; ripple feedforward; sensor circuitry; series filter element; voltage injection; Active filters; Automotive engineering; Buck converters; Capacitance; Circuit topology; Magnetic separation; Output feedback; Passive filters; Transfer functions; Voltage control;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.2003.1207259