Method and apparatus for estimating DC motor brush wear
AssigneeGeneral Electric Company
InventorsJohn Erik Hershey, Brock Estel Osborn, Deniz Senturk, Howard Daniel Koontz, Brian Joseph McManus, Edward James Lewandowski
Life of this patent
Estimating the term…
Abstract
An apparatus for estimating DC motor brush wear comprising: a wear element calculator adapted to calculate a plurality of wear elements from at least one environmental variable; a wear element multiplier adapted to multiply the wear elements by respective ones of a plurality of wear coefficients to yield a plurality of weighted wear elements; and a summer adapted to sum the weighted wear elements to yield a brush wear estimate.
Claims12
An apparatus for estimating DC motor brush wear comprising:
- a wear element calculator adapted to calculate a plurality of wear elements from at least one environmental variable;
- a wear element multiplier adapted to multiply said wear elements by respective ones of a plurality of wear coefficients to yield a plurality of weighted wear elements;
- and
- a summer adapted to sum said weighted wear elements to yield a brush wear estimate.
An apparatus for estimating DC motor brush wear comprising:
- a wear element calculator adapted to calculate a plurality of wear elements from at least one environmental variable selected from a group consisting of:
- segment distance, nominal load, relative humidity, ambient temperature, precipitation indicator, dead motor indicator, live motor indicator, average spring force, gaining grade load, and losing grade load;
- a wear element multiplier adapted to multiply said wear elements by respective ones of a plurality of wear coefficients to yield a plurality of weighted wear elements;
- a summer adapted to sum said weighted wear elements to yield a brush wear estimate;
- and
- a wear coefficient estimator adapted to estimate said wear coefficients by linear regression on a data set comprising:
- a plurality of said wear elements;
- and
- a plurality of brush wear measurements.
A method of estimating DC motor brush wear comprising:
- calculating a plurality of wear elements from at least one environmental variable;
- multiplying said wear elements by respective ones of a plurality of wear coefficients to yield a plurality of weighted wear elements;
- and
- summing said weighted wear elements to yield a brush wear estimate.
A method of estimating DC motor brush wear comprising:
- calculating a plurality of wear elements from at least one environmental variable selected from a group consisting of:
- segment distance, nominal load, relative humidity, ambient temperature, precipitation indicator, dead motor indicator, live motor indicator, average spring force, gaining grade load, and losing grade load;
- multiplying said wear elements by respective ones of a plurality of wear coefficients to yield a plurality of weighted wear elements;
- summing said weighted wear elements to yield a brush wear estimate;
- and
- estimating said wear coefficients by linear regression on a data set comprising:
- a plurality of said wear elements;
- and
- a plurality of brush wear measurements.
Dependencies are inferred from the claim text.