System and method for predicting mechanical failure of a motor
First Claim
1. A method for a vehicle having plural electric motors, the method comprising:
- using one or more processors to generate motor electrical signatures for the motors, the motor electrical signatures representative of one or more characteristics of electrical energy that is supplied to the motors;
using the one or more processors to identify one or more disturbance peaks of the electrical signatures, wherein one or more fault measures of each of the motor electrical signatures, are based on the number of disturbance peaks and indicative of mechanical characteristics of the motors;
using the one or more processors to compare the one or more fault measures of each motor with the one or more fault measures of the other motors in the same vehicle;
using the one or more processors to predict an impending mechanical failure of one or more of the motors based on comparing the fault measures of the motors; and
using the one or more processors, responsive to the impending mechanical failure that is predicted, to generate a signal relating to at least one of vehicle control to bring the vehicle to a stop or vehicle movement for the vehicle to travel to a designated maintenance facility.
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Accused Products
Abstract
A method for a vehicle having plural electric motors includes generating motor electrical signatures for the motors. The motor electrical signatures represent one or more characteristics of electrical energy that is supplied to the motors. The method also includes identifying one or more fault measures of each of the motor electrical signatures. The fault measures are indicative of mechanical characteristics of the motors. The method further includes comparing the one or more fault measures of each motor with the one or more fault measures of the other motors in the same vehicle and predicting an impending mechanical failure of one or more of the motors based on comparing the fault measures of the motors.
32 Citations
29 Claims
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1. A method for a vehicle having plural electric motors, the method comprising:
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using one or more processors to generate motor electrical signatures for the motors, the motor electrical signatures representative of one or more characteristics of electrical energy that is supplied to the motors; using the one or more processors to identify one or more disturbance peaks of the electrical signatures, wherein one or more fault measures of each of the motor electrical signatures, are based on the number of disturbance peaks and indicative of mechanical characteristics of the motors; using the one or more processors to compare the one or more fault measures of each motor with the one or more fault measures of the other motors in the same vehicle; using the one or more processors to predict an impending mechanical failure of one or more of the motors based on comparing the fault measures of the motors; and using the one or more processors, responsive to the impending mechanical failure that is predicted, to generate a signal relating to at least one of vehicle control to bring the vehicle to a stop or vehicle movement for the vehicle to travel to a designated maintenance facility. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A failure prediction system comprising:
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an input/output (I/O) module configured to determine one or more characteristics of electrical energy that is supplied to plural electric motors in a vehicle; a signature generation module configured to create motor electrical signatures for the motors, the motor electrical signatures representative of the characteristics of the electrical energy supplied to the motors; and an analysis module configured to identify one or more disturbance peaks and determine one or more fault measures of the motor electrical signatures of one or more of the motors based on the number of disturbance peaks, the fault measures indicative of mechanical characteristics of one or more of the motors, wherein the analysis module is configured to compare the fault measures of each motor with the fault measures of the other motors in the same vehicle, predict an impending mechanical failure of one or more of the motors based on comparing the fault measures of the motors and, responsive to the impending mechanical failure that is predicted, generate a signal relating to at least one of vehicle control to bring the vehicle to a stop or vehicle movement for the vehicle to travel to a designated maintenance facility. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A non-transitory computer readable storage medium for a system having a processor, the computer readable storage medium including one or more sets of instructions that direct the processor to:
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generate motor electrical signatures for plural electric motors of a common vehicle, the motor electrical signatures representative of one or more characteristics of electrical energy that is supplied to the motors; identify the number of one or more disturbance peaks to determine one or more fault measures of each of the motor electrical signatures, the fault measures indicative of mechanical characteristics of the motors; compare the one or more fault measures of each motor with the one or more fault measures of the other motors in the same vehicle; predict an impending mechanical failure of one or more of the motors based on comparing the fault measures of the motors; and generate, responsive to the impending mechanical failure that is predicted, a signal relating to at least one of vehicle control to bring the vehicle to a stop or vehicle movement for the vehicle to travel to a designated maintenance facility. - View Dependent Claims (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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obtaining respective electrical signatures of the plural electric motors, wherein the electrical signatures relate to respective electrical energy supplied to the motors; using one or more processors to perform a comparison of the electrical signature of one of the motors to the electrical signatures of the other motors in the same vehicle; using the one or more processors to determine an impending mechanical failure of said one of the motors based on the comparison; using the one or more processors to communicate a signal in response to determining the impending mechanical failure, wherein the signal is communicated to off-board the vehicle; and using the one or more processors, responsive to the impending mechanical failure that is predicted, to generate a signal relating to at least one of vehicle control to bring the vehicle to a stop or vehicle movement for the vehicle to travel to a designated maintenance facility. - View Dependent Claims (28, 29)
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Specification