The effect of magnetic saturation on sensorless control of a brushless permanent magnet motor under AC and DC excitation

Antonio Griffo*, Rafal Wrobel, Phil Mellor, Derrick Holliday, Parminder Sangha, Andrei Dinu, Marc Holme

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

2 Citations (Scopus)

Abstract

The design and performance of a permanent magnet rotor for a concentrated wound, torque dense machine exhibiting a saliency profile suited to high-frequency injection based zero-and low-speed sensorless control is presented. Rotor design is mechanically constrained by an existing stator. Electromagnetic specifications require the motor to match the torque capability of an existing baseline machine whilst demonstrating a saliency characteristic suited for injection based, low-speed sensorless control. The effects of fundamental current amplitude on flux saturation and saliency profile are investigated for brushless DC and brushless AC operation. The saliency profiles required for sensorless detection show significant differences under these operating modes. For the selected rotor design, brushless AC operation results in a stronger saliency signature at light loads, which quickly deteriorates with the onset of saturation. Brushless DC operation results in more gradual deterioration in saliency signature, suggesting sensorless control would be possible over a greater torque range.

Translated title of the contributionThe effect of magnetic saturation on sensorless control of a brushless permanent magnet motor under AC and DC excitation
Original languageEnglish
Title of host publication2011 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
Place of PublicationNEW YORK
PublisherIEEE Computer Society
Pages1582-1589
Number of pages8
ISBN (Print)978-1-4577-0541-0
DOIs
Publication statusPublished - 17 Sep 2011
EventIEEE Energy Conversion Congress and Exposition (ECCE) - Phoenix, Argentina
Duration: 17 Sep 201122 Sep 2011

Conference

ConferenceIEEE Energy Conversion Congress and Exposition (ECCE)
CountryArgentina
CityPhoenix
Period17/09/1122/09/11

Bibliographical note

Conference Organiser: IEEE

Keywords

  • AC and DC operation
  • MACHINE
  • POSITION DETECTION
  • sensorless control
  • PM motor
  • DRIVES
  • ROTOR POSITION
  • design

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