Method and apparatus for sensorless operation of brushless permanent magnet motors

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

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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:

Sriram, Tillasthanam V ^[1]

Carmel, IN

Issue Date:: 1998-01-01

Research Org.:: Midwest Research Institute, Kansas City, MO (United States)

OSTI Identifier:: 871475

Patent Number(s):: 5739652

Assignee:: General Motors Corporation (Detroit, MI)

Patent Classifications (CPCs):: H - ELECTRICITY H02 - GENERATION H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS

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H - ELECTRICITY H02 - GENERATION H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS
H02P6/182 - using back-emf in windings
H02P2209/07 - Trapezoidal waveform
H02P6/187 - {using the star point voltage}

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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.

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                    Sriram, Tillasthanam V. Method and apparatus for sensorless operation of brushless permanent magnet motors.  United States.

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                    Sriram, Tillasthanam V. Thu .  
        "Method and apparatus for sensorless operation of brushless permanent magnet motors".  United States.  https://www.osti.gov/servlets/purl/871475.

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@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}

}

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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. 23 figs.
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