SPMSM design considerations for initial position and magnet polarity estimation using carrier signal injection

Kan Akatsu, Michael C. Harke, Robert D. Lorenz

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

6 Citations (Scopus)

Abstract

Initial position and magnet polarity estimation is required for smooth start-up of permanent magnet synchronous machines. The signal-to-noise ratio of the salient signals used for initial position and magnet polarity estimation depends on the machine design and affects the overall performance of the estimation technique. This paper investigates the design of a ring-magnet, surface permanent magnet synchronous machine to maximize the signal-to-noise ratio of the position and polarity signals without compromising the machine performance. Since the rotor geometry is fixed given the ring-magnet, the effect of the stator tooth tip geometry on the saliency signals is evaluated using finite element analysis. By adding a bridge between the stator teeth, the magnitude of the polarity-based signal can be increased significantly. A coupled simulation verifies the implementation of the improved initial position and magnet polarity estimation based on modified machine design.

Original languageEnglish
Title of host publicationConference Record of the 2007 IEEE Industry Applications Conference 42nd Annual Meeting, IAS
Pages2393-2398
Number of pages6
DOIs
Publication statusPublished - 2007 Dec 1
Externally publishedYes
Event2007 IEEE Industry Applications Conference 42nd Annual Meeting, IAS - New Orleans, LA, United States
Duration: 2007 Sep 232007 Sep 27

Publication series

NameConference Record - IAS Annual Meeting (IEEE Industry Applications Society)
ISSN (Print)0197-2618

Conference

Conference2007 IEEE Industry Applications Conference 42nd Annual Meeting, IAS
CountryUnited States
CityNew Orleans, LA
Period07/9/2307/9/27

Keywords

  • Initial position estimation
  • Machine design
  • Polarity signals
  • SPMSM
  • Self-sensing
  • Sensorless
  • Signal injection

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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