Portable system for immotive multiphasic motive force electrical machine testing

• US 9,261,562 B2
• Filed: 10/04/2008
• Issued: 02/16/2016
• Est. Priority Date: 10/04/2008
• Status: Active Grant

• Current Assignee: Avo Multi-AMP Corporation (Thyssen Bornemisza Family)
• Original Assignee: SKF USA Incorporated (SKF)
• Inventors: Lee, Sang Bin, Wiedenbrug, Ernesto
• Primary Examiner(s): Satanovsky, Alexander
• Application Number:
  US13/122,542
• Publication Number:
  US 20110191034A1
• Time in Patent Office: 2,691 Days
• Field of Search: 702/35, 702 57- 60
• US Class Current: 1/1
• CPC Class Codes: G01R 31/343 in operation
• CPC Class Codes: H02P 29/0241 the fault being an overvoltage

Abstract

A portable test device (1) can be configured as a rotor conductivity anomaly tester, a magnetic core anomaly tester, or a rotational eccentricity fault tester for a multiphasic motive force electrical machine (6) by providing an immotive multiphasic motive force electrical machine test signal from a plurality of multiphasic motive force electrical machine signal generators (4) through a detachable electrical power connectivity (2) and by having a multiphasic motive force electrical machine fault analyzer (16) that can sense responses and discern the existence of a fault. Control of the test signal can be accomplished by an immotive multiphasic test signal controller (3) that varies frequency and achieves incremental movement or to achieve stator magnetization plane angle changes or movement that tests angular relationships.

Claims

1. A portable multiphasic induction motor or generator test device comprising:

a portable test device containment;

a plurality of interconnected waveform signal generators established within said portable test device containment;

an immotive multiphasic test signal controller to which said plurality of interconnected waveform signal generators are responsive and that generates a plurality of immotive multiphasic test signals, each comprised of three signals, each of which signal is applied to a phase of said multiphasic motor or generator, wherein each of said plurality of immotive multiphasic test signals has a set phase combination of said three signals that does not cause motion of movement elements of a multiphasic motor or generator, and wherein said plurality of immotive multiphasic test signals generated by said immotive multiphasic test signal controller comprise;

a first immotive multiphasic test signal having a first phase,

a second immotive multiphasic test signal having a second phase 180°

off of said first phase,

a plurality of successively, angular location incremented first and second immotive multiphasic test signals having successive phases incremented off of said first and second immotive multiphasic test signals,

a multiphasic motive force electrical machine fault analyzer that conducts mathematical analysis to discern the existence of an anomaly in said multiphasic induction motor or generator and provide an indication to cause, if needed, repair or replacement of said anomaly in said multiphasic induction motor or generator based on the results of said analysis;

test containment supply circuitry responsive to said immotive multiphasic test signal controller; and

a detachable electrical power connectivity issuing from said portable test device containment and electrically connected to said test containment supply circuitry.

2. A portable multiphasic induction motor or generator test device as described in claim 1 and further comprising:

a multiphasic motive force electrical machine response sensor element;

a sensor return connected to said multiphasic motive force electrical machine response sensor element;

and wherein said multiphasic motive force electrical machine fault analyzer is responsive to said sensor element and configured to assess the existence of a fault in said multiphasic induction motor or generator.

3. A portable multiphasic induction motor or generator test device as described in claim 2 wherein said a plurality of interconnected waveform signal generators established within said portable test device containment comprises a plurality of multiphasic motive force electrical machine signal generators.

4. A portable multiphasic induction motor or generator test device as described in claim 1 wherein said immotive multiphasic test signal controller to which said plurality of interconnected waveform signal generators are responsive comprises an immotive multiphasic test signal variation controller.

5. A portable multiphasic induction motor or generator test device as described in claim 4 wherein said wherein said immotive multiphasic test signal controller to which said plurality of interconnected waveform signal generators are responsive comprises an immotive multiphasic test signal reapplication controller, and wherein said multiphasic motive force electrical machine analyzer is configured to assess the existence of a fault in said multiphasic induction motor or generator.

6. A portable multiphasic induction motor or generator device as described in claim 4 wherein said immotive multiphasic test signal variation controller comprises an immotive multiphasic test signal variation controller selected from a group consisting of:

an immotive multiphasic test signal voltage variation controller;

an immotive multiphasic test signal current variation controller;

an immotive multiphasic test signal magnitude variation controller;

an immotive multiphasic test signal relative amplitude variation controller;

an immotive multiphasic test signal frequency variation controller;

all permutations and combination of the above.

7. A portable multiphasic induction motor or generator test device as described in claim 1 wherein said a plurality of interconnected waveform signal generators established within said portable test device containment comprises an interconnected waveform signal generators selected from a group consisting of:

a sinusoidal waveform immotive multiphasic test signal generator;

a multiple frequency immotive multiphasic test signal generator;

a frequency sweep immotive multiphasic test signal generator;

a sawtooth waveform immotive multiphasic test signal generator;

a fourier transform determinate waveform immotive multiphasic test signal generator;

all permutations and combination of the above.

8. A portable multiphasic induction motor or generator test device as described in claim 1 wherein said an immotive multiphasic test signal controller to which said plurality of interconnected waveform signal generators are responsive comprises an immotive multiphasic test signal frequency variation controller.

9. A portable multiphasic induction motor or generator test device as described in claim 8 wherein said a plurality of interconnected waveform signal generators established within said portable test device containment comprises an interconnected waveform signal generators selected from a group consisting of:

an about ¼

Hz immotive multiphasic test waveform signal generator;

an about 10 Hz immotive multiphasic test waveform signal generator;

an about 500 Hz immotive multiphasic test waveform signal generator;

an about 1000 Hz immotive multiphasic test waveform signal generator;

a sub-hertz immotive multiphasic test waveform signal generator;

a high and low frequency immotive multiphasic test waveform signal generator;

a superimposed high and low frequency immotive multiphasic test waveform signal generator;

a plurality of different frequency immotive multiphasic test waveform signals generator;

a superimposed immotive multiphasic test waveform signal and movement signal generator;

a variable depth immotive multiphasic test waveform signal generator;

a rotor component immotive multiphasic test waveform signal generator;

a stator component immotive multiphasic test waveform signal generator;

a first component optimized immotive multiphasic test waveform signal generator;

a second component optimized immotive multiphasic test waveform signal generator;

a first effect indicative immotive multiphasic test waveform signal generator;

a second effect indicative immotive multiphasic test waveform signal generator;

a depth effect indicative immotive multiphasic test waveform signal generator;

all permutations and combination of the above.

10. A portable multiphasic induction motor or generator test device as described in claim 1 wherein said immotive multiphasic test signal controller to which said plurality of interconnected waveform signal generators are responsive comprises an immotive multiphasic test signal amplitude variation controller.

11. A portable multiphasic induction motor or generator test device as described in claim 10 wherein said immotive multiphasic test signal amplitude variation controller comprises an immotive multiphasic test signal relative amplitude variation controller.

12. A portable multiphasic induction motor or generator test device as described in claim 10 wherein said immotive multiphasic test signal amplitude variation controller comprises an immotive multiphasic test signal magnetic field intensity factor variation controller.

13. A portable multiphasic induction motor or generator test device as described in claim 12 wherein said immotive multiphasic test signal magnetic field intensity factor variation controller comprises an immotive multiphasic test signal magnetic field intensity factor variation controller selected from a group consisting of:

an about 0.33 tesla factor immotive multiphasic test signal magnetic field intensity factor variation controller;

an about 0.50 tesla factor immotive multiphasic test signal magnetic field intensity factor variation controller;

an about 0.67 tesla factor immotive multiphasic test signal magnetic field intensity factor variation controller;

an about one tesla factor immotive multiphasic test signal magnetic field intensity factor variation controller;

an about 1.33 tesla factor immotive multiphasic test signal magnetic field intensity factor variation controller;

all permutations and combination of the above.

14. A method of testing for a rotor conductivity anomaly in a multiphasic induction motor or generator comprising the steps of:

accepting a multiphasic induction motor or generator assembled in a working environment;

positioning a portable test device proximate to an electrical supply for said multiphasic induction motor or generator;

detachably electrically connecting said portable test device to said electrical supply for said multiphasic induction motor or generator;

establishing movement elements of said multiphasic induction motor or generator in a stationary state;

generating a plurality of immotive multiphasic test signals, each comprised of three signals, each of which signal is applied to a phase of said multiphasic motor or generator from said portable test device, wherein each of said three signals has a set phase combination that does not cause motion of said movement elements of said multiphasic motor or generator, said plurality of immotive multiphasic test signals comprising;

a first immotive multiphasic test signal having a first phase;

a second immotive multiphasic test signal having a second phase 180°

off of said first phase;

a plurality of successively, angular location incremented first and second immotive multiphasic test signals having successive phases incremented off of said first and second immotive multiphasic test signals;

applying said plurality of immotive multiphasic test signals to at least a portion of said electrical supply for said multiphasic induction motor or generator; and

sensing responses of said induction motor or generator to said plurality of immotive multiphasic test signals by at least one sensor element, that senses the responses of said multiphasic motor or generator to each of said plurality of immotive multiphasic test signals when applied to each phase of said multiphasic motor or generator in said phase combination, and that provides a sensor test signal response output;

conducting analysis of said sensor test signal response output to discern the existence of a rotor conductivity anomaly from said response of said multiphasic induction motor or generator to said plurality of immotive multiphasic test signals; and

providing an indication to cause, if needed, repair or replacement of said rotor conductivity anomaly in said multiphasic induction motor or generator as a result of said analysis.

15. A method of testing for a rotor conductivity anomaly in a multiphasic induction motor or generator as described in claim 14 wherein said step of conducting mathematical analysis to discern the existence of a rotor conductivity anomaly from said response of said multiphasic induction motor or generator to said immotive multiphasic test signal comprises the step of discerning the existence of a rotobar fault.

16. A method of testing for a rotor conductivity anomaly in a multiphasic induction motor or generator as described in claim 14 wherein said step of conducting mathematical analysis to discern the existence of a rotor conductivity anomaly from said response of said multiphasic induction motor or generator to said immotive multiphasic test signal comprises the step of discerning the existence of a frequency variation effect.

17. A method of testing for a rotor conductivity anomaly in a multiphasic induction motor or generator as described in claim 16 wherein said step of discerning the existence of a frequency variation effect comprises the step of discerning the existence of an effect that decreases with increasing frequency test signals.

18. A method of testing for a rotor conductivity anomaly in a multiphasic induction motor or generator as described in claim 15 and further comprising the step of assessing the existence of a rotobar fault depth indicia.

19. A method of testing for a rotor conductivity anomaly in a multiphasic induction motor or generator as described in claim 14 wherein said step of conducting mathematical analysis to discern the existence of a rotor conductivity anomaly from said response of said multiphasic induction motor or generator to said immotive multiphasic test signal comprises the step of discerning the existence of a rotor conductivity anomaly selected from a group consisting of:

discerning the existence of a rotor resistance anomaly;

discerning the existence of a rotor circuit resistance anomaly;

discerning the existence of a motor brush imbalance anomaly;

discerning the existence of a motor diode bridge anomaly; and

all permutations and combination of the above.

20. A method of testing for a rotor conductivity anomaly in a multiphasic induction motor or generator as described in claim 14 wherein said step of conducting mathematical analysis to discern the existence of a rotor conductivity anomaly from said response of said multiphasic induction motor or generator to said immotive multiphasic test signal comprises the step of discerning the existence of a locational variation effect.

21. A method for multiphasic induction motor or generator testing as described claim 14 and further comprising the step of discerning the existence of a stator magnetization core fault from said response of said multiphasic induction motor or generator to said immotive multiphasic test signal.

22. A method for multiphasic induction motor or generator testing as described in claim 21 wherein said step of discerning the existence of a stator magnetization core fault from said response of said multiphasic induction motor or generator to said immotive multiphasic test signal comprises the step of discerning the existence of a frequency variation effect.

23. A method for multiphasic induction motor or generator testing as described in claim 22 wherein said step of discerning the existence of a frequency variation effect comprises the step of discerning the existence of a substantially frequency squared proportional effect.

24. A method for multiphasic induction motor or generator testing as described in claim 14 and further comprising the step of discerning the existence of a rotational eccentricity fault for said multiphasic induction motor or generator from said response to said immotive multiphasic test signal.

25. A method for multiphasic induction motor or generator testing as described in claim 24 wherein said step of discerning the existence of a rotational eccentricity fault for said multiphasic induction motor or generator from said response to said immotive multiphasic test signal comprises the step of discerning the existence of a frequency variation effect.

26. A method for multiphasic induction motor or generator testing as described in claim 25 wherein said step of discerning the existence of a rotational eccentricity fault for said multiphasic induction motor or generator from said response to said immotive multiphasic test signal further comprises the step of discerning the existence of a locational variation effect.

27. A method for multiphasic induction motor or generator testing as described in claim 25 wherein said step of discerning the existence of a frequency variation effect comprises the step of discerning the existence of an effect that increases with increasing frequency test signals.