System and method of electric motor fault detection
AssigneeDelphi Technologies, Inc.
InventorJames E. Walters
Life of this patent
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Abstract
A system for detecting faults in a motor includes a drive circuit, a detection circuit, and a controller. The drive circuit is configured to apply a drive signal to a motor. The detection circuit is configured to detect a response signal generated when the drive signal is applied to the motor. The controller is configured to determine a motor fault based on a comparison of the response signal to an expected signal for the drive signal applied to the motor. The drive signal is selected to generate a rotating magnetic field in the motor with a rotation-frequency greater than a maximum mechanical-response-frequency of the motor.
Claims19
A system for detecting faults in a motor, said system comprising:
- a drive circuit configured to apply a drive signal to a motor;
- a detection circuit configured to detect a response signal generated when the drive signal is applied to the motor;
- and
- a controller configured to determine a motor fault based on a comparison of the response signal to an expected signal for the drive signal applied to the motor, wherein
- the drive signal is selected to generate a rotating magnetic field in the motor with a rotation-frequency greater than a maximum mechanical-response-frequency of the motor.
A method of detecting faults in a motor, said method comprising:
- applying a drive signal to a motor;
- detecting a response signal that arises when the drive signal is applied to the motor;
- and
- determining a motor fault based on a comparison of the response signal to an expected signal for the drive signal applied to the motor, wherein
- the drive signal is selected to generate a rotating magnetic field in the motor with a rotation-frequency greater than a maximum mechanical-response-frequency of the motor.
Dependencies are inferred from the claim text.