Predicting motor failure based on relationship of motor pair characteristics

• US 9,800,195 B2
• Filed: 06/22/2016
• Issued: 10/24/2017
• Est. Priority Date: 03/05/2013
• Status: Expired due to Fees

• Current Assignee: Joy Global Underground Mining LLC (Komatsu Ltd.)
• Original Assignee: Joy Mm Delaware Incorporated (Mitsui & Company Limited)
• Inventors: Wilson, James, van Wyk, Nicolaas Petrus
• Primary Examiner(s): Desta, Elias
• Application Number:
  US15/189,247
• Publication Number:
  US 20160308485A1
• Time in Patent Office: 489 Days
• CPC Class Codes: H02K 11/25 Devices for sensing temperature, or actuated thereby
• CPC Class Codes: H02K 2213/06 Machines characterised by the presence of fail safe, back up, redundant or other similar emergency arrangements
• CPC Class Codes: H02P 29/64 Controlling or determining the temperature of the winding

Abstract

A system and method of predicting motor failure based on relationships of motor pair characteristics, such as temperatures. One method includes receiving, by a controller, a parameter of a first motor on a mining machine from a first parameter sensor on a mining machine. The method also includes receiving, by the controller, a parameter of a second motor on the mining machine from a second parameter sensor on the mining machine. The method also includes outputting an alarm signal, by the controller, upon (1) determining that at least one of the parameters of the first motor and the second motor exceeds a parameter threshold and (2) determining that the parameter of the first motor differed from the parameter of the second motor by at least a difference threshold for a predetermined amount of time.

Claims

1. A method of predicting motor failure, the method comprising:

receiving, by a controller, a parameter of a first motor on a mining machine from a first parameter sensor on a mining machine;

receiving, by the controller, a parameter of a second motor on the mining machine from a second parameter sensor on the mining machine; and

outputting an alarm signal, by the controller, upon

determining that at least one selected from the group consisting of the parameter of the first motor and the parameter of the second motor exceeds a parameter threshold, and

determining that the parameter of the first motor differed from the parameter of the second motor by at least a difference threshold for a predetermined amount of time.

2. The method of claim 1, wherein the alarm signal is received by at least one selected from the group consisting of the mining machine and a remote device and, in response, the at least one of the mining machine and the remote device produces at least one of an audible, visual, or tactile indication of receiving the alarm signal.

3. The method of claim 1, wherein

the step of receiving, by the controller, of the parameter of the first motor on the mining machine includes receiving a data file of aggregated parameter data for the first motor, and

the step of receiving, by the controller, of the parameter of the second motor on the mining machine includes receiving the data file of aggregated parameter data for the second motor.

4. The method of claim 1, wherein

the parameters of the first and second motors are temperatures;

and

the parameter threshold is a temperature threshold.

5. The method of claim 1, further comprising:

determining, by the controller, which of the parameter of the first motor and the parameter of the second motor is larger; and

selecting, by the controller, the difference threshold based on which of the parameter of the first motor and the parameter of the second motor is larger.

6. The method of claim 5, the method further comprising

selecting a first threshold value to be the difference threshold when the parameter of the first motor is larger than the parameter of the second motor and a second threshold value when the parameter of the second motor is larger than the parameter of the first motor,

wherein the first threshold value is smaller than the second threshold value, and

wherein the first motor and the second motor are part of a series cooling system, the first motor receiving a cooling agent before the second motor in the series cooling system.

7. A mining machine monitoring system, the system comprising:

a motor pair of a machine including a first motor and a second motor;

a first parameter sensor that detects a first parameter of the first motor;

a second parameter sensor that detects a second parameter of the second motor; and

a controller coupled to the first and second parameter sensors to obtain the first and second parameters, the controller outputting an alarm signal upon

determining that at least one selected from the group of the first parameter and the second parameter exceeds a parameter threshold, and

determining that the first parameter of the first motor differed from the second parameter of the second motor by at least a difference threshold for a predetermined amount of time.

8. The mining machine monitoring system of claim 7, wherein the controller is located remote from the machine and communicates with the machine via a network.

9. The mining machine monitoring system of claim 7, wherein the alarm signal is received by at least one selected from the group consisting of the machine and a remote device and, in response, the at least one of the machine and the remote device produces at least one of an audible, visual, or tactile indication of receiving the alarm signal.

10. The mining machine monitoring system of claim 7, wherein

the first and second parameter sensors are temperature sensors;

the first and second parameters of the first and second motors are temperatures; and

the parameter threshold is a temperature threshold.

11. The mining machine monitoring system of claim 7, wherein the controller is configured to determine which of the first parameter of the first motor and the second parameter of the second motor is larger, and wherein the difference threshold is selected based on which of the first parameter of the first motor and the second parameter of the second motor is larger.

12. The mining machine monitoring system of claim 11, further comprising:

a series cooling system configured to cool the first motor and the second motor, the first motor receiving a cooling agent before the second motor in the series cooling system,

wherein the difference threshold is selected to be a first threshold value when the first parameter is larger than the second parameter and is selected to be a second threshold value when the second parameter is larger than the first parameter, and

wherein the first threshold value is smaller than the second threshold value.

13. A method of predicting motor failure, the method comprising:

receiving, by a controller, a first parameter of a first motor on a mining machine from a first parameter sensor on a mining machine;

receiving, by the controller, a second parameter of a second motor on the mining machine from a second parameter sensor on the mining machine, wherein the second motor is downstream from the first motor in a series cooling system;

outputting a first alarm signal, by the controller, upon determining that the first parameter of the first motor is greater than the second parameter of the second motor by at least a first difference threshold; and

outputting a second alarm signal, by the controller, upon determining that the second parameter of the second motor is greater than the first parameter of the first motor by at least a second difference threshold, wherein the second difference threshold is greater than the first difference threshold.

14. The method of claim 13, further comprising:

determining, by the controller, which of the first parameter and the second parameter is larger; and

selecting, by the controller, between the first difference threshold and the second difference threshold based on the determination of which of the first parameter and the second parameter is larger.

15. The method of claim 13, wherein the first alarm signal is received by at least one selected from the group consisting of the mining machine and a remote device and, in response, the at least one of the mining machine and the remote device produces at least one of an audible, visual, or tactile indication of receiving the first alarm signal.

16. The method of claim 13, wherein

the first and second parameters are temperatures;

and

the first and second difference thresholds are temperature thresholds.

17. The method of claim 13,

wherein outputting the first alarm signal is dependent on determining that the first parameter is greater than a parameter threshold, and

wherein outputting the second alarm signal is dependent on determining that the second parameter is greater than the parameter threshold.

18. A mining machine monitoring system, the system comprising:

a series cooling system on a mining machine;

a motor pair of the mining machine including a first motor and a second motor, wherein the second motor is downstream from the first motor in the series cooling system;

a first parameter sensor that detects a first parameter of the first motor;

a second parameter sensor that detects a second parameter of the second motor;

a controller coupled to the first and second parameter sensors to obtain the first and second parameters, the controller configured to

receive the first parameter detected by the first parameter sensor,

receive the second parameter detected by the second parameter sensor,

output a first alarm signal upon determining that the first parameter of the first motor is greater than the second parameter of the second motor by at least a first difference threshold, and

output a second alarm signal upon determining that the second parameter of the second motor is greater than the first parameter of the first motor by at least a second difference threshold, wherein the second difference threshold is greater than the first different threshold.

19. The mining machine monitoring system of claim 18, wherein the controller is further configured to

select between the first difference threshold and the second difference threshold based on determining which of the first parameter and the second parameter is larger.

20. The mining machine monitoring system of claim 18, wherein the controller is located remote from the machine and communicates with the machine via a network.

21. The mining machine monitoring system of claim 18, wherein

the first and second parameter sensors are temperature sensors;

the first and second parameters are temperatures; and

the first and second difference thresholds are temperature thresholds.

22. The method of claim 18, wherein the controller is further configured to

output the first alarm signal dependent on determining that the first parameter is greater than a parameter threshold, and

output the second alarm signal dependent on determining that the second parameter is greater than the parameter threshold.