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Title: Method and apparatus for sensorless operation of brushless permanent magnet motors

Abstract

A sensorless method and apparatus for providing commutation timing signals for a brushless permanent magnet motor extracts the third harmonic back-emf of a three-phase stator winding and independently cyclically integrates the positive and negative half-cycles thereof and compares the results to a reference level associated with a desired commutation angle.

Inventors:
 [1]
  1. (Carmel, IN)
Publication Date:
Research Org.:
Midwest Research Institute
OSTI Identifier:
871475
Patent Number(s):
US 5739652
Assignee:
General Motors Corporation (Detroit, MI) NREL
DOE Contract Number:  
AC36-83CH10093
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; sensorless; operation; brushless; permanent; magnet; motors; providing; commutation; timing; signals; motor; extracts; third; harmonic; back-emf; three-phase; stator; winding; independently; cyclically; integrates; positive; negative; half-cycles; compares; results; reference; level; associated; desired; angle; stator winding; timing signal; permanent magnet; timing signals; magnet motor; third harmonic; brushless permanent; /318/

Citation Formats

Sriram, Tillasthanam V. Method and apparatus for sensorless operation of brushless permanent magnet motors. United States: N. p., 1998. Web.
Sriram, Tillasthanam V. Method and apparatus for sensorless operation of brushless permanent magnet motors. United States.
Sriram, Tillasthanam V. Thu . "Method and apparatus for sensorless operation of brushless permanent magnet motors". United States. https://www.osti.gov/servlets/purl/871475.
@article{osti_871475,
title = {Method and apparatus for sensorless operation of brushless permanent magnet motors},
author = {Sriram, Tillasthanam V.},
abstractNote = {A sensorless method and apparatus for providing commutation timing signals for a brushless permanent magnet motor extracts the third harmonic back-emf of a three-phase stator winding and independently cyclically integrates the positive and negative half-cycles thereof and compares the results to a reference level associated with a desired commutation angle.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

Patent:

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