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Design of Filter for Output Signals in Incremental Encoder for Detecting Speed and Position of Motors  

Ahn Jung-Ryol (울산대 대학원 전기전자정보시스템공학부)
Lee Hong-Hee (울산대 전기전자정보시스템공학부)
Kim Heung-Gun (경북대 전자전기공학부)
Nho Eui-Cheol (부경대 공대 전기제어계측공학부)
Chun Tae-Won (울산대 전기전자정보시스템공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.10, no.3, 2005 , pp. 290-295 More about this Journal
Abstract
The incremental encoder has been mostly used to measure the speed and position of the motor. As the output signals of encoder are high frequency digital signals, they have much influence on radiation noises due to switching of the power semiconductor circuits. It is so difficult to suppress the noises with the conventional LPF. In this paper, the hardware digital filter for suppressing noises in the output signals of the encoder signals is developed. As both the clock frequency and counter in the digital filter for encoder are easily adjusted according to the kinds of noises, any noises in the encoder can be entirely eliminated. The performance of the digital filter has been verified by simulation and experimental results.
Keywords
Incremental encoder; noises; hardware digital filter; speed detection;
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  • Reference
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