有源滤波器中数字低通滤波器设计及其实现

Design and implementation of digital filter in active power filter

本文介绍了数字滤波器的种类和设计方法,在MATLAB环境下对满足有源滤波器性能要求的低通数字式滤波器进行了实例设计,并分析了其滤波特性,最后结合有源滤波器中所使用的DSP控制器,完成了该低通数字滤波器的实现。

In this paper, some ordinary types of low\|pass digital filters are compared in order to satisfy the active power filter. Some types of digital filters are brought forward and their advantages and disadvantages are tested through simulation using simulink kit in Matlab. Suitable topology is selected out of those types. And then an available implement method based on DSP is discussed using extended 32\|bit multiplication. Finally a concrete digital filter design case is introduced with parameters and the result waveform from TMS320F2407 under the project of active power filter research. Some function chart and flow chart are also given. 