System, method, and computer software code for detection and interchangeability of a motor

• US 7,557,528 B2
• Filed: 09/25/2006
• Issued: 07/07/2009
• Est. Priority Date: 09/25/2006
• Status: Active Grant

• Current Assignee: GE Global Sourcing LLC (Westinghouse Air Brake Technologies Corporation)
• Original Assignee: General Electric Company
• Inventors: Jones, Kevin, Kumar, Ajith K.
• Primary Examiner(s): Ro; Bentsu
• Assistant Examiner(s): PAUL, ANTONY M
• Application Number:
  US11/534,772
• Publication Number:
  US 20080074070A1
• Time in Patent Office: 1,016 Days
• Field of Search: 318/561, 318/567, 318/565, 318/700, 318/400.01, 702/181, 702/182, 702/183, 702/184, 702/188
• US Class Current: 318/565
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 50/00 Electric propulsion with power supplied within the vehicle with power supply from force of nature, e.g. sun or wind, B60L8/00; for monorail vehicles, suspension vehicles or rack railways B60L13/00
• CPC Class Codes: B60L 9/00 Electric propulsion with power supply external to the vehicle electric propulsion for monorail vehicles, suspension vehicles or rack railways B60L13/00; in combination with batteries or fuel cells within the vehicle B60L50/53
• CPC Class Codes: H02P 23/14 Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility

Abstract

A method for autonomously identifying a type of motor based on a characteristic value of the motor, the method including measuring a characteristic value of a motor, comparing the measured characteristic value to a known characteristic value, and identifying the motor based on the measured characteristic value when compared to the known characteristic value.

Claims

1. A method for autonomously identifying a type of an unknown motor, said unknown motor being configured to function optimally at a respective one of a plurality of known characteristic values, the method comprising:

a. measuring a characteristic value of the unknown motor;

b. comparing the measured characteristic value to the plurality of known characteristic values, each known characteristic value being associated with a respective type of the unknown motor, to ascertain the identity of the type of the unknown motor; and

c. identifying the type of the unknown motor based on the comparing of the measured characteristic value to the plurality of known characteristic values.

2. The method of claim 1 wherein a characteristic value comprises at least one of a number of poles that are part of the unknown motor, rotor saliency, speed sensor teeth, phase sequence, speed sensor sequence, resistance value, inductance value, magnetization, frequency, torque, voltage, current, and resistance temperature.

3. The method of claim 1 further comprises applying torque to the unknown motor while measuring the characteristic value.

4. The method of claim 3 further comprises determining magnetization characteristics of the unknown motor.

5. The method of claim 3 further comprising:

a. limiting an amount of torque produced;

b. applying a voltage to the unknown motor to a known level based on a present vehicle speed;

c. measuring an exciting current of the unknown motor;

d. comparing the measured exciting current to expected levels; and

e. if the determined motor type is different than that presently assumed, revising application parameters for optimum motor control.

6. The method of claim 5 wherein comparing the measured exciting current to expected levels comprises at least one of levels based on applied voltage, speed, and torque.

7. The method of claim 1 further comprises measuring the characteristic value while the unknown motor is not operating.

8. The method of claim 7 further comprises applying an external characteristic while measuring the characteristic value.

9. The method of claim 1 wherein measuring a characteristic value further comprises determining at least one of a current value and a torque value of the unknown motor so as to determine a number of poles.

10. The method of claim 1 wherein measuring a characteristic value further comprises measuring at least one of ripple current and voltage when a rotor on the unknown motor is spinning.

11. The method of claim 1 wherein measuring a characteristic value further comprises evaluating teeth on a speed sensor that is proximate the unknown motor.

12. The method of claim 1 wherein measuring a characteristic value further comprises measuring a phase sequence of the unknown motor.

13. The method of claim 1 wherein measuring a characteristic value further comprises measuring magnetization characteristics of the unknown motor.

14. The method of claim 1 wherein measuring a characteristic value further comprises measuring at least one of a resistance and inductance of the unknown motor while the unknown motor is not operating.

15. The method of claim 1 further comprising operating the unknown motor at a specific speed while measuring the characteristic value and comparing the measured characteristic value to a known characteristic value wherein the known characteristic value is based on the specific speed.

16. The method of claim 1 further comprises applying a known voltage for a short duration and measuring the unknown motor'"'"'s phase current response;

and comparing a resulting change in current over the short duration based on a change in phase current along with the known voltage and the short duration with an expected value.

17. The method of claim 16 further comprises applying at least one of a single-phase voltage and a high frequency three phase voltage such that the type of the unknown motor may be determined based on a resistance value of the unknown motor.

18. The method of claim 1 wherein the step of comparing the measured characteristic value to a known characteristic value further includes determining the known characteristic based on at least one of a look-up table and an equation into which the measured characteristic value is applied.

19. The method of claim 1 wherein the unknown motor is part of at least one of a locomotive and an off-road vehicle.

20. The method of claim 1 wherein the unknown motor comprises at least one of a traction motor, radiator motor, cooling blower motor, exhaust motor, alternator, and pump motor.

21. A system for autonomously identifying a type of an unknown motor, said unknown motor being configured to function optimally at a respective one of a plurality of known characteristic values, the system comprising:

a. a measuring device to measure a characteristic value of the unknown motor;

b. a processor that receives data specific to the measured characteristic value;

c. a storage device in communication with the processor;

d. wherein the processor compares the measured characteristic value to the plurality of known characteristic values, each known characteristic value being associated with a respective type of the unknown motor, so as to determine the type of the unknown motor.

22. The system of claim 21 further comprises an introducing device to provide an external characteristic to the unknown motor so that the measuring device can measure the characteristic value generated by the introduced element.

23. The system of claim 21 wherein the external characteristic comprises at least one of current and voltage.

24. The system of claim 21 wherein the known characteristic value is determined by at least one of a look-up table and an equation.

25. The system of claim 21 wherein the unknown motor is part of at least one of a locomotive and an off-road vehicle.

26. The system of claim 21 wherein the unknown motor comprises at least one of a traction motor, radiator motor, cooling blower motor, exhaust motor, alternator, and pump motor.

27. A computer software code operable within a processor for autonomously identifying a type of an unknown motor, said unknown motor being configured to function optimally at a respective one of a plurality of known characteristic values, the computer software code comprising:

a. a computer module for measuring a characteristic value of the unknown motor;

b. a computer module for comparing the measured characteristic value to the plurality of known characteristic values, each known characteristic value being associated with a respective type of the unknown motor, to ascertain the type of the unknown motor; and

c. a computer module for identifying the type of the unknown motor based on the measured characteristic value when compared to the plurality of known characteristic values.

28. The computer software code of claim 27 further comprises a computer module for operating the unknown motor while measuring the characteristic value.

29. The computer software code of claim 27 further comprises a computer module for measuring the characteristic value while the unknown motor is not operating.

30. The computer software code of claim 27 further comprises a computer module for applying an external characteristic while measuring the characteristic value.

31. The computer software code of claim 27 wherein the unknown motor is part of at least one of a locomotive and an off-road vehicle.

32. The computer software code of claim 27 wherein the unknown motor comprises at least one of a traction motor, radiator motor, cooling blower motor, exhaust motor, alternator, and pump motor.