Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1992-03-16
1997-07-29
Nguyen, Vinh P.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
G01R 3102
Patent
active
056525257
ABSTRACT:
Apparatus and method are provided for determining and indicating if certain types of circuit failures have occurred in a D.C. motor circuit such as a locked rotor condition, a short-circuit or an open circuit. The method includes the steps of, and the apparatus involves applying a voltage to two leads of the D.C. motor sufficient to cause motor rotation, determining if flyback exists, determining if back EMF exists, and, finally, if a back EMF does not exist and flyback does exist then indicating a locked rotor condition. However, if a back EMF does not exist and flyback does not exist then an indication is provided that either an open-circuit or short-circuit condition exists. The same apparatus and method can be used with a voltage not sufficient to cause motor rotation, although given this limitation only flyback can be detected, so that only an open-circuit or short-circuit condition can be indicated.
REFERENCES:
patent: 3045177 (1962-07-01), Weed
patent: 3769576 (1973-10-01), Norkaitis
patent: 3869664 (1975-03-01), Safer et al.
patent: 4266168 (1981-05-01), Andersen
patent: 4292574 (1981-09-01), Sipin et al.
patent: 4300081 (1981-11-01), Van Landinghan
patent: 4338555 (1982-07-01), Rhodes
patent: 4547723 (1985-10-01), McLellan
patent: 4574225 (1986-03-01), Pashall et al.
patent: 4682103 (1987-07-01), DeNardis
patent: 4736142 (1988-04-01), Waymire
patent: 4743848 (1988-05-01), Krimm et al.
patent: 4857814 (1989-08-01), Duncan
patent: 4859921 (1989-08-01), Archer
patent: 4928043 (1990-05-01), Plunkett
patent: 4965513 (1990-10-01), Hayes et al.
patent: 4967123 (1990-10-01), Lebrock
patent: 4996477 (1991-02-01), Keeler et al.
patent: 5030917 (1991-07-01), Kliman
patent: 5049815 (1991-09-01), Kliman
patent: 5268623 (1993-12-01), Muller
patent: 5352963 (1994-10-01), Garand et al.
Webster's II New Riverside University Dictionary (1984), pp. 637 and 1004 (no month available).
L.C. Shen and J. A. Kong, Applied Electromagnetism (Brooks/Cole Engineering Division, Monterey, California, 1983), pp. 396-397 (no month available).
B. C. Kuo, Automatic Control Systems, 5th ed. (Prentice-Hall, Englewood Cliffs, New Jersey, 1987), pp. 166-172. (no month available).
A.V. Oppenheim and R. W. Schafer, Digital Signal Processing (Prentice-Hall, Englewood Cliffs, New Jersey, 1975), pp. 26-27. (no month available).
K.J. Astrom and B. Wittenmark, Computer Controlled Systems: Theory and Design (Prentice-Hall, Englewood Cliffs, New Jersey, 1984), pp. 20, 21, 30, 31, 60, 66, 67 and 187. (no month available).
IEEE Standard Dictionary of Electricql and Electronics Terms (IEEE, 1984), p. 630. (no month available).
Article by L.A. Berordinis entitled Good Motors Get Even Better in Machine Design dated Nov. 21, 1991, pp. 71 through 75.
Bader Clifford J.
Mullin Eugene T.
Desilets, Jr. Roland B.
Lockheed Martin Tactical Systems, Inc.
Nguyen Vinh P.
Ratner Allan
Weinstein Stanton D.
LandOfFree
System and method for detecting D.C. motor circuit failures does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for detecting D.C. motor circuit failures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for detecting D.C. motor circuit failures will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-636144