L2-Stable Speed Estimator for BLDCM Servo System Applications

Kwan Soo Kim, Sangwoo Park, Seok Kyoon Kim, Hyun Ho Kang, Choon Ki Ahn

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


This study aims to solve the brushless DC motor speed estimation problem using Hall sensor measurements without dependence of plant parameter and load information. As the first feature, the proposed solution involves a combination of linear (in the Luenberger observer form) and nonlinear subsystems without motor parameter information for the estimation algorithm and the gains. The second feature is showing that the proposed estimator makes the error dynamics L2 -stable, assigning the desired energy and diagonal damping to the closed-loop system. The superiority of the proposed solution is verified using a 420W motor-generator hardware testbed for the current and speed control operation modes.

Original languageEnglish
Pages (from-to)2822-2826
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Issue number6
Publication statusPublished - 2022 Jun 1

Bibliographical note

Publisher Copyright:
© 2004-2012 IEEE.


  • Speed estimation
  • encoder measurement
  • observer
  • pole-zero cancellation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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