System and method of electric motor fault detection
First Claim
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1. 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, whereinthe 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.
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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.
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Citations
19 Claims
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1. A system for detecting faults in a motor, said system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of detecting faults in a motor, said method comprising:
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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. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification