Predicting motor failure based on relationship of motor pair characteristics

• US 9,391,495 B2
• Filed: 03/05/2013
• Issued: 07/12/2016
• Est. Priority Date: 03/05/2013
• Status: Active Grant

• 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:
  US13/785,550
• Publication Number:
  US 20140257722A1
• Time in Patent Office: 1,225 Days
• US Class Current: 1/1
• 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. A motor pair detection module receives temperatures for each motor of a motor pair over a predetermined window. The motor pair detection module determines whether at least one of the temperatures of the first motor and the second motor exceeds a temperature threshold during the predetermined time window. The motor pair detection module further determines whether the temperature of the first motor differed from the temperature of the second motor by at least a difference threshold for at least a percentage threshold of the predetermined time window. Based on the determinations, the motor pair temperature outputs an alarm signal to indicate a potential impending failure of one of the motors of the motor pair.

Claims

1. A method of predicting motor failure comprising:

receiving, by a motor pair detection module, a parameter of a first motor on a mining machine for a predetermined time window from a first parameter sensor on a mining machine;

receiving, by the motor pair detection module, a parameter of a second motor on the mining machine for the predetermined time window from a second parameter sensor on the mining machine;

outputting an alarm signal, by the motor pair detection module, upon

determining that at least one of the parameters of the first motor and the second motor exceeds a parameter threshold during the predetermined time window, and

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

2. The method of claim 1, wherein the mining machine is a continuous miner and the motor pair drives one of gathering heads, cutting heads, and tracks on the continuous miner.

3. The method of claim 1, wherein the difference threshold is at least fifteen (15) percent of the parameter threshold.

4. The method of claim 1, wherein the percentage threshold is at least fifty (50) percent.

5. The method of claim 1, wherein the predetermined time window is at least five (5) minutes.

6. The method of claim 1, wherein the motor pair detection module is implemented on the mining machine.

7. The method of claim 1, wherein the motor pair detection module is located remote from the machine and communicates with the mining machine via a network.

8. 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.

9. The method of claim 1, wherein

the step of receiving, by the motor pair detection module, of the parameter of the first motor on the mining machine for the predetermined time window includes receiving a data file of aggregated parameter data for the first motor, and

the step of receiving, by the motor pair detection module, of the parameter of the second motor on the mining machine for the predetermined time window includes receiving the data file of aggregated parameter data for the second motor.

10. The method of claim 1, wherein

the parameters of the first and second motors are temperatures;

and

the parameter threshold is a temperature threshold.

11. A mining machine monitoring system comprising:

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

a first parameter sensor that detects a parameter of the first motor for a predetermined time window;

a second parameter sensor that detects a second parameter of the second motor for the predetermined time window;

a motor pair detection module coupled to the first and second parameter sensors to obtain the first and second parameters, the motor pair detection module outputting an alarm signal upon

determining that at least one of the first and second parameters exceeds a parameter threshold during the predetermined time window, 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 at least a percentage threshold of the predetermined time window.

12. The mining machine monitoring system of claim 11, wherein the machine is a continuous miner and the motor pair drives one of gathering heads, cutting heads, and tracks on the continuous miner.

13. The mining machine monitoring system of claim 11, wherein the difference threshold is at least fifteen (15) percent of the parameter threshold.

14. The mining machine monitoring system of claim 11, wherein the percentage threshold is at least fifty (50) percent.

15. The mining machine monitoring system of claim 11, wherein the predetermined time window is at least five (5) minutes.

16. The mining machine monitoring system of claim 11, wherein the motor pair detection module is implemented on the machine.

17. The mining machine monitoring system of claim 11, wherein the motor pair detection module is located remote from the machine and communicates with the machine via a network.

18. The mining machine monitoring system of claim 11, 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.

19. The mining machine monitoring system of claim 11, wherein the motor pair detection module obtains the parameters from a data file of aggregated parameter data for the first motor and the second motor.

20. The mining machine monitoring system of claim 11, 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.