System and method for predicting mechanical failure of a motor
First Claim
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1. A method comprising:
- monitoring first characteristics of an electrical signal supplied to a traction motor of a vehicle during a first detection window, the first characteristics representing a first motor electrical signature for the traction motor, wherein the first characteristics are monitored as measurements of electric current supplied to the traction motor prior to the electric current reaching the traction motor;
deriving one or more signature values from a first mathematical model of the first motor electrical signature;
predicting a mechanical failure of the traction motor based on the one or more signature values; and
automatically generating a vehicle control signal for changing one or more of tractive effort or braking effort of the vehicle in response to predicting the mechanical failure.
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Abstract
A method for predicting mechanical failure of a traction motor in a vehicle includes monitoring first characteristics of an electrical signal supplied to a traction motor of a vehicle during a first detection window. The first characteristics represent a first motor electrical signature for the traction motor. The method also includes deriving one or more signature values from a first mathematical model of the first motor electrical signature and predicting a mechanical failure of the traction motor based on the one or more signature values.
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Citations
29 Claims
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1. A method comprising:
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monitoring first characteristics of an electrical signal supplied to a traction motor of a vehicle during a first detection window, the first characteristics representing a first motor electrical signature for the traction motor, wherein the first characteristics are monitored as measurements of electric current supplied to the traction motor prior to the electric current reaching the traction motor; deriving one or more signature values from a first mathematical model of the first motor electrical signature; predicting a mechanical failure of the traction motor based on the one or more signature values; and automatically generating a vehicle control signal for changing one or more of tractive effort or braking effort of the vehicle in response to predicting the mechanical failure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system comprising:
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a signature generation module configured to monitor first characteristics of an electrical signal supplied to a traction motor of a vehicle during a first detection window, the first characteristics representing a first motor electrical signature for the traction motor, wherein the signature generation module is configured to monitor the first characteristics by measuring electric current supplied to the traction motor prior to the electric current reaching the traction motor; and an analysis module configured to determine a first mathematical model of the first motor electrical signal and to derive one or more signature values from the first mathematical model, wherein the analysis module is further configured to predict a mechanical failure of the traction motor based on the one or more signature values. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for a vehicle having plural electric motors, the method comprising:
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monitoring one or more characteristics of electric current supplied to the motors prior to the electric current reaching the motors; generating motor electrical signatures for the motors, the motor electrical signatures representative of the one or more characteristics of the electrical current that is supplied to the motors, wherein each motor is a same type of motor and includes a same type of bearing as the other motors; identifying one or more fault measures of each of the motor electrical signatures, the fault measures indicative of mechanical characteristics of the bearings of the motors; performing a comparison of the one or more fault measures of each motor with the one or more fault measures of the other motors in the same vehicle; predicting a mechanical failure of the bearing of one of the motors based on the comparison; and generating a vehicle control signal to change one or more of tractive effort or braking effort of the vehicle responsive to predicting the mechanical failure. - View Dependent Claims (28, 29)
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Specification