Electricity: motive power systems – Limitation of motor load – current – torque or force
Patent
1990-03-23
1991-04-09
Shoop, Jr., William M.
Electricity: motive power systems
Limitation of motor load, current, torque or force
361 33, H02H 708
Patent
active
050067699
ABSTRACT:
An arrangement for detecting winding shorts in a rotor winding of an electrical machine having a drive shaft with a drive end directly connected to ground and a measuring element provided at the non-drive end of the drive shaft for recording the shaft voltage between the machine shaft and ground. The voltage measuring element produces an output corresponding to the shaft voltage, which is applied to an analysis unit. The analysis unit evaluates the even or fractional harmonic content of the shaft voltage and outputs an alarm signal in the event that the even or fractional harmonic content exceeds a predetermined value.
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J. W. Wood et al., IEE Proceedings, vol. 133, Pt. B, No. 3, May 1986 Rotor Winding Short Detection, pp. 181-189.
Asea Brown Boveri Ltd.
Shoop Jr. William M.
Wysocki A. Jonathan
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