A modified instantaneous speed observer design for brushless AC motors

Ming Shyan Wang, Po Jui Hsiao, Nguyen Thi Hanh, Tzuu Hseng S. Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Low speed control of servo systems is required in some applications. Motor speed is generally acquired from the so-called M method, which averages the number of pulses from the coupled encoder by a fixed time period. As a result, a long detection delay time, due to speeds lower than the minimum measurable value determined by the sampling frequency and the resolution of the encoder, may degrade the performance or even make system unstable. Instantaneous speed observers and/or disturbance torque observers provide merits of simple structure and easy implementation. However, this method is obsessed by the sensitivity to the instantaneous speed estimation due to the parameter variations. In this paper, a simply modified instantaneous speed observer is proposed to overcome the sensitivity problem. The experimental results without and with load will verify the effectiveness of the proposed algorithm such that the controllable motor speed is much lower than the minimum measurable value.

Original languageEnglish
Title of host publication2010 International Conference on System Science and Engineering, ICSSE 2010
Pages481-485
Number of pages5
DOIs
Publication statusPublished - 2010 Oct 11
Event2010 International Conference on System Science and Engineering, ICSSE 2010 - Taipei, Taiwan
Duration: 2010 Jul 12010 Jul 3

Publication series

Name2010 International Conference on System Science and Engineering, ICSSE 2010

Other

Other2010 International Conference on System Science and Engineering, ICSSE 2010
CountryTaiwan
CityTaipei
Period10-07-0110-07-03

All Science Journal Classification (ASJC) codes

  • Computational Theory and Mathematics
  • Computer Science Applications
  • Information Systems
  • Control and Systems Engineering

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