Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Patent
1994-03-15
1996-10-29
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
361 78, 361 23, H02H 504
Patent
active
055702562
ABSTRACT:
A device and apparatus for monitoring faults in a three phase induction machine are disclosed herein. The device and method utilize values of the currents in the three phases and the voltages of the three phases to estimate a current portion which is not substantially affected by the load torque effects of the machine. This current portion is related to the unacceptable magnetic fields present in the machine. These fields are typically caused by electrical or mechanical problems in the machine, and when the current portion exceeds a predetermined limit, operation of the machine can be discontinued.
REFERENCES:
patent: 3845354 (1974-10-01), Boothman et al.
patent: 4319298 (1982-03-01), Davis et al.
patent: 4647825 (1987-03-01), Profio et al.
patent: 4939437 (1990-07-01), Farag et al.
patent: 5345158 (1994-09-01), Kliman et al.
IQ-1000 Motor Protection System User's Manual, .COPYRGT.1987, Westinghouse Electric Corporation-Control Division.
The IQ-2000 Motor Command System: A New Concept in Motor Command, Denis Mueller, Sr. Eng., Gen. Control Div., Westinghouse Electric.
Habetler Thomas G.
Schoen Randy
Gaffin Jeffrey A.
Medley Sally C.
Siemens Energy & Automation Inc.
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