System and method for motor fault detection by space vector angular fluctuation
AssigneeReliance Electric Technologies, LLC
InventorsPeter J. Unsworth, Dragica Kostic Perovic
Life of this patent
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Abstract
Systems and methodologies are disclosed for detecting faults and adverse conditions associated with electric motors. The method comprises obtaining a current signal associated with the motor, calculating a space vector from the current signal, determining a space vector angular fluctuation from the space vector, and analyzing the space vector angular fluctuation in order to detect at least one fault associated with the motor. Systems are disclosed having a diagnostics component adapted to obtain a space vector angular fluctuation from a current signal relating to operation of the motor, and to analyze the space vector angular fluctuation in order to detect at least one fault in the motor.
Claims34
A method of detecting faults in a motor, comprising:
- obtaining a current signal associated with the motor;
- calculating a space vector from the current signal;
- determining a space vector angular fluctuation from the space vector;
- and
- analyzing the space vector angular fluctuation in order to detect at least one fault associated with the motor.
A method of detecting faults in a motor, comprising:
- obtaining a voltage signal associated with the motor;
- calculating a space vector from the voltage signal;
- determining a space vector angular fluctuation from the space vector;
- and
- analyzing the space vector angular fluctuation in order to detect at least one fault associated with the motor.
A method of detecting faults in a motor, comprising:
- determining a threshold parameter;
- obtaining a first and second current samples;
- calculating a difference between the first and the second current samples;
- on the difference being less than the threshold parameter, remembering the difference as a healthy sample;
- and
- on the difference being greater than the threshold parameter, modifying the threshold parameter to be equal to the difference.
A system for detecting faults in a motor, comprising:
- means for obtaining a current signal associated with the motor;
- means for calculating a space vector from the current signal;
- means for determining a space vector angular fluctuation from the space vector;
- and
- means for analyzing the space vector angular fluctuation in order to detect at least one fault associated with the motor.
A system for detecting faults in a motor, comprising a diagnostic component operative to obtain a space vector angular fluctuation from a current signal relating to operation of the motor, and to analyze the space vector angular fluctuation in order to detect at least one fault in the motor.
Dependencies are inferred from the claim text.