A low cost position sensor for linear variable reluctance motor

Chow Norbert Cheung

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Acad. Publ., World Publ. Corp. This paper presents a novel position sensing system for a linear switched reluctance motor. By measuring the inductance variation on the fixed tooth track using two coiled devices aligned 90 degrees out of phase, the position and direction information of the moving platform can be obtained. To increase the resolution 16 times its original tooth pitch resolution, signal alignment and non-sinusoidal waveform interpolation techniques are employed. The proposed sensing system is designed, fabricated and implemented on a linear variable reluctance motion platform. Preliminary results show that the proposed sensing system can produce, reliable position information with high accuracy and repeatability, and at high pulse output rate. This position information is useful for both accurate phase commutation and servo position feedback.
Original languageEnglish
Title of host publicationProceedings - IPEMC 2000
Subtitle of host publication3rd International Power Electronics and Motion Control Conference
Number of pages6
ISBN (Electronic)780003464X, 9787800034640
Publication statusPublished - 1 Jan 2000
Event3rd International Power Electronics and Motion Control Conference, IPEMC 2000 - Beijing, China
Duration: 15 Aug 200018 Aug 2000


Conference3rd International Power Electronics and Motion Control Conference, IPEMC 2000


  • Sine-cosine interpolation
  • Variable reluctance position sensor

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Control and Systems Engineering
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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