Title :
Control of a hybrid filter topology for the reduction of high frequency harmonics
Author :
Bergmann, J. ; Hoffmann, K.F. ; Gleich, B. ; Woywode, O.
Author_Institution :
Dept. of Power Electron., Helmut Schmidt Univ., Hamburg, Germany
Abstract :
The Digital Chain is realized as an adaptive finite impulse response filter (FIR). FIR filters with the order of N consist of (N-1) time delay elements, adder and filter coefficients w(n). Based on the measured harmonics in the voltage of ZLoad the filter coefficients are adjusted using the Filtered x Least Mean Square (FxLMS) algorithm [2]. The FxLMS is a stochastic gradient descent method producing the least mean squares of the detected harmonics by updating the filter coefficients with the given formula: w(n +1) = w(n) + μe(n)x(n).
Keywords :
FIR filters; adders; delays; least mean squares methods; magnetic variables control; network topology; stochastic processes; FIR filters; adaptive finite impulse response filter; adder coefficients; digital chain; filter coefficients; filtered X least mean square algorithm; high frequency harmonic reduction; hybrid filter topology; stochastic gradient descent method; time delay elements; Band-pass filters; Filtering algorithms; Finite impulse response filters; Harmonic analysis; Magnetic separation; Power harmonic filters; Voltage measurement;
Conference_Titel :
Magnetic Particle Imaging (IWMPI), 2013 International Workshop on
Conference_Location :
Berkeley, CA
Print_ISBN :
978-1-4673-5520-9
Electronic_ISBN :
978-1-4673-5521-6
DOI :
10.1109/IWMPI.2013.6528328
