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Method and apparatus for sensorless operation of brushless permanent magnet motors

Patent ·
OSTI ID:871475
 [1]
  1. Carmel, IN
+ Show Author Affiliations
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.
Research Organization:
Midwest Research Institute
DOE Contract Number:
AC36-83CH10093
Assignee:
General Motors Corporation (Detroit, MI)
Patent Number(s):
US 5739652
OSTI ID:
871475
Country of Publication:
United States
Language:
English

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Related Subjects

/318/
angle
apparatus
associated
back-emf
brushless
brushless permanent
commutation
compares
cyclically
desired
extracts
half-cycles
harmonic
independently
integrates
level
magnet
magnet motor
method
motor
motors
negative
operation
permanent
permanent magnet
positive
providing
reference
results
sensorless
signals
stator
stator winding
third
third harmonic
three-phase
timing
timing signal
timing signals
winding