Monitoring health of electrical equipment
AssigneeIntel Corporation
InventorsHoang Tran Van, Siew Wen Chin, Fatema S. Adenwala, Ravindra V. Narkhede
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Abstract
Techniques for monitoring the health of a device comprising a motor or generator are described. An apparatus to monitor the health of the device includes a plurality of sensors to detect root-mean-square (RMS) current values for a plurality of stator windings of the device. The apparatus also includes a processor to receive the RMS current values from the plurality of sensors and compute a fault indicator based on the RMS current values. The fault indicator represents a level of current imbalance between the plurality of stator windings due to winding faults.
Claims19
A device comprising a motor or generator and an apparatus to monitor the health of the device, comprising:
- a plurality of stator windings of the device;
- a plurality of sensors to detect root-mean-square (RMS) current values for each of the plurality of stator windings of the device;
- and
- a processor to:
- receive the RMS current values from the plurality of sensors;
- convert the RMS current values to peak current values;
- determine a modified direct current, Id, and a modified quadrature current, Iq, based on the peak current values and referencing a phase angle of 120 degrees in place of an actual measured phase angle;
- compute a fault indicator based on the modified direct current, Id, and the modified quadrature current, Iq, wherein the fault indicator represents a level of current imbalance between the plurality of stator windings due to winding faults;
- and
- transmit the fault indicator to a display device.
A method of monitoring the health of a motor, comprising:
- generating AC drive currents and delivering the drive currents to a plurality of stator windings of the motor to drive the motor at a specified motor speed;
- receiving root-mean-square (RMS) current values from a plurality of sensors, wherein each RMS current value represents an RMS current on each of the plurality of stator windings;
- converting the RMS current values to peak current values;
- determining a modified direct current, Id, and a modified quadrature current, Iq, based on the peak current values and referencing a phase angle of 120 degrees in place of an actual measured phase angle;
- computing a fault indicator based on the modified direct current, Id, and the modified quadrature current, Iq, wherein the fault indicator represents a level of current imbalance between the plurality of stator windings due to winding faults;
- and
- transmitting the fault indicator to a display device.
A tangible, non-transitory, computer-readable medium comprising instructions that, when executed by a processor, direct the processor to operate a health monitor for a device comprising a motor or generator, the instructions to direct the processor to:
- detect root-mean-square (RMS) current values for a plurality of stator windings of the device;
- convert the RMS current values to peak current values;
- determine a modified direct current, Id, and a modified quadrature current, Iq, based on the peak current values and referencing a phase angle of 120 degrees in place of an actual measured phase angle;
- compute a fault indicator based on the modified direct current, Id, and the modified quadrature current, Iq, wherein the fault indicator represents a level of current imbalance between the plurality of stator windings due to winding faults;
- and
- transmit the fault indicator to a display device.
Dependencies are inferred from the claim text.