Electricity: electrical systems and devices – Safety and protection of systems and devices – Generator protective circuits
Reexamination Certificate
2005-05-10
2005-05-10
Sircus, Brian (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Generator protective circuits
C361S091100
Reexamination Certificate
active
06891706
ABSTRACT:
An exciter for an electrical power generator includes a shaft, an armature connected to the shaft, a field surrounding the armature to cause the armature to generate an alternating current, and a rectifying wheel The rectifying wheel includes a plurality of semiconductor switching devices connected to the rectifying wheel and arranged in a bridge configuration for rectifying the alternating current from the field. A respective non-linear protection device is connected in parallel with each of the semiconductor switching devices.
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Studies of Non-Linear Capacitors for Application in Snubber Modules for Power Electronic Switches, J.D. Van Wyk, C.K. Campbell, M.F.K. Holm, J.J. Schoeman, Proceedings, 6thConference on Power Electronics and Motion Control (PEMC '90) vol. 1 Budapest, Oct. 1-3, 1990, pp. 42-45.
P. Wetzel, “Thyristorschutz mit Halbleitern—Wirtschaftlich und Sicher—Thyristor Protection by Means of Semiconductors—Effcient and Reliable,” BBC Nachrichten, Brown-Boveri Und Co. Ag. Mannheim, DE, vol. 59, No. 3/4, 1977, pp. 152-158.
Kitov Zeev
Siemens Westinghouse Power Corporation
Sircus Brian
LandOfFree
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