Title: Frequency tracking power frequency digital filtering method
Application Number: 200610147649 Application Date: 2006.12.21
Publication Number: 1976225 Publication Date: 2007.06.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03H17/02;H03H21/00;H03L7/08;H03L7/18
Applicant(s) Name: Shanghai Jiaotong Univ. Address:
Inventor(s) Name: Wang Zhizhong;Fei Junli;Zhang Danfeng
Attorney & Agent: wangti lin zhangzong meng
Abstract:
    A method for filtering power frequency digit by frequency-tracking includes switching power frequency reference signal into signal input end of phase locked loop, outputting eight frequency multiplier signal of power frequency by said loop when eight frequency division signal of power frequency outputted by central processor is switched into comparison input end of said loop, using said frequency multiplier signal as sampling signal sequence, using comb filtering algorithm to realize trop of power frequency and its frequency multiplier, finally controlling and outputting filtered signal by central processor.
Time: 15
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