METHOD AND SYSTEM FOR DETECTING HEALTH OF WINDINGS FOR ELECTROMAGNETIC DEVICES
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United States of America Patent
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Issued Date -
Oct 29, 2015
app pub date -
Apr 24, 2014
filing date -
Apr 24, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present disclosure provides a method and system for measuring an increase in wattage to detect a potential winding failure. The increase in watts in the winding occurs when a time-varying magnetic field from active turns of the winding induces a time-varying current on shorted turns of the winding. The resistance through the shorted turns and the induced current result in power usage and increased watts. The wattage increase is much greater than a resistance decrease in the winding by the shorted turns. Measuring the watts results in detecting a shorting winding with greater sensitivity than measuring the resistance. In one embodiment, the winding can be tested offline with a wattmeter and power supply. In another embodiment, the winding in use and its wattage can be monitored continuously or periodically locally or remotely, with an optional sensor to initiate a signal upon reaching a certain percentage increase in watts.
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