Methods for correcting slow roll
First Claim
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1. A method comprising a plurality of activities comprising:
- for a shaft of an electric motor, the shaft comprising a slow roll sensing area, responsive to a first determined slow roll value, measured at the slow roll sensing area, exceeding a predetermined threshold;
determining a first electrical runout value for the slow roll sensing area from the first determined slow roll value;
rotating the shaft at a speed of less than 25 revolutions per minute;
heating the slow roll sensing area of the shaft to a temperature approximately within a predetermined temperature range for approximately a predetermined time interval, said heating sufficient to reduce the electrical runout value; and
applying a liquid coolant to a non-sensing area of the shaft to resist a thermal distortion of the non-sensing area.
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Abstract
Certain exemplary embodiments comprise a method comprising a plurality of activities comprising, for a shaft of an electric motor, the shaft comprising a runout sensing area: determining an electrical runout value for the runout sensing area; rotating the shaft; and/or heating the runout sensing area of the shaft sufficient to reduce the electrical runout value.
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Citations
19 Claims
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1. A method comprising a plurality of activities comprising:
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for a shaft of an electric motor, the shaft comprising a slow roll sensing area, responsive to a first determined slow roll value, measured at the slow roll sensing area, exceeding a predetermined threshold; determining a first electrical runout value for the slow roll sensing area from the first determined slow roll value; rotating the shaft at a speed of less than 25 revolutions per minute; heating the slow roll sensing area of the shaft to a temperature approximately within a predetermined temperature range for approximately a predetermined time interval, said heating sufficient to reduce the electrical runout value; and applying a liquid coolant to a non-sensing area of the shaft to resist a thermal distortion of the non-sensing area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
for a shaft comprising a runout sensing area; determining an electrical runout value for the runout sensing area; rotating the shaft; heating the runout sensing area of the shaft to a temperature approximately within a predetermined temperature range for approximately a predetermined time interval, said heating sufficient to reduce the electrical runout value; and applying a liquid coolant to a non-sensing area of the shaft.
Specification