Systems and methods for air gap and eccentricity detection for electric motor
AssigneeGM Global Technology Operations LLC
InventorsJohn S. Agapiou, Anmol Aggarwal, Sean Robert Wagner
Life of this patent
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Abstract
An eccentricity detection system includes: a vibration eccentricity module configured to determine a vibration eccentricity of the electric motor based on vibration of the electric motor measured during operation of the motor; an inductance eccentricity module configured to determine an inductance eccentricity of the electric motor based on an incremental inductance curve of the electric motor; and a fault module configured to indicate whether the electric motor includes an eccentricity fault based on both (a) the vibration eccentricity of the electric motor and (b) the inductance eccentricity of the electric motor.
Claims20
An eccentricity detection system comprising:
- a vibration eccentricity module configured to determine a vibration eccentricity of an electric motor based on vibration of the electric motor measured during operation of the electric motor;
- an inductance eccentricity module configured to determine an inductance eccentricity of the electric motor based on an incremental inductance curve of the electric motor;
- and
- a fault module configured to selectively indicate that the electric motor includes an eccentricity fault when both (a) the vibration eccentricity of the electric motor is greater than a first predetermined value and (b) the inductance eccentricity of the electric motor is greater than a second predetermined value.
An eccentricity detection method comprising:
- determining a vibration eccentricity of an electric motor based on vibration of the electric motor measured during operation of the electric motor;
- determining an inductance eccentricity of the electric motor based on an incremental inductance curve of the electric motor;
- and
- selectively indicating that the electric motor includes an eccentricity fault when both (a) the vibration eccentricity of the electric motor is greater than a first predetermined value and (b) the inductance eccentricity of the electric motor.
Dependencies are inferred from the claim text.