Influence of position measuring errors on speed ripple in servo drives

Josef Wittmann, Rainer Hagl, Ralph Kennel

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

Position measuring devices with sinusoidal measuring signals are widely used in position-controlled servo drives in industrial automation, e.g., for machine tools or semiconductor production machines. Usually, the feedback signal for the speed or velocity controller is calculated from the measured position. Therefore, position measuring errors affect these control loops. This study presents an analytic error model that considers non-ideal sinusoidal measuring signals with basic deviations (amplitude differences, offset errors, and phase shift) as well as signal harmonics. The model was used to systematically investigate the influence of signal quality and the number of signal periods from position measuring devices on speed ripple, across a wide range of speeds. A test stand with a high-resolution reference angle measuring device was used to confirm the results.

Original languageEnglish
Title of host publication2016 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1272-1278
Number of pages7
ISBN (Electronic)9781509020676
DOIs
StatePublished - 28 Jul 2016
Event2016 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2016 - Capri, Italy
Duration: 22 Jun 201624 Jun 2016

Publication series

Name2016 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2016

Conference

Conference2016 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2016
Country/TerritoryItaly
CityCapri
Period22/06/1624/06/16

Keywords

  • Position measuring error
  • number of signal periods
  • servomotor
  • signal quality
  • speed control
  • speed ripple

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