A novel magnet polarity identification method for initial position estimation for sensorless IPMSM drive

Minglei Gu, Satoshi Ogasawara, Masatsugu Takemoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This paper proposes a novel magnet polarity identification method for initial position estimation during startup for interior permanent magnet synchronous machine (IPMSM) drives. The rotor's initial position estimation is based on magnetic saliency and employs high-frequency (HF) components of the voltage and current that are excited by the multi space-vector pulse-width modulation (MSVPWM) pattern. However, there is a common trouble in the estimation methods based on the magnetic saliency: it is necessary to identify the magnet polarity in order to distinguish the north and south poles since the estimated position angle is a periodic function with π radians. In this paper, a novel inductance estimation method is presented and the magnet polarity is uniquely identified by the relationship between the estimated inductance and the magnetic saturation effect. Experimental results confirm the advantages of the proposed method: it is reliable, accurate, and convenient, and can be done in real time.

Original languageEnglish
Pages (from-to)434-441
Number of pages8
JournalIEEJ Transactions on Electrical and Electronic Engineering
Volume9
Issue number4
DOIs
Publication statusPublished - Jul 1 2014
Externally publishedYes

Keywords

  • Inductance estimation
  • Initial rotor position
  • Interior permanent magnet synchronous motor
  • Magnetic saliency
  • Position-sensor-less control

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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