Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1976-04-27
1979-08-14
Rolinec, Rudolph V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
310 68D, 322 99, 324 51, 324158D, G01R 3122, G01R 3102, H02K 1100
Patent
active
041647050
ABSTRACT:
A brushless excitation system for a synchronous dynamoelectric machine includes an alternating current exciter and a rotating rectifier assembly. In such a system, the alternating current exciter includes a salient pole stator field member and a polyphase armature rotor member. A sensing coil is disposed around at least one of the salient stator poles for developing an alternating electrical signal in response to changes in the magnetic flux wave linking the rotating armature member and the field coil of the salient stator pole member. Means connected to the sensing coil indicates variations in the alternating current signal which correspond with disturbances in the rotary electric circuit of the brushless exciter such as a line-to-line short circuit or a phase-to-phase short circuit in the armature winding, or shorted diodes or open fuses in the rotating rectifier assembly.
REFERENCES:
patent: 2640100 (1953-05-01), Packer et al.
patent: 2939074 (1960-05-01), Perrett
patent: 3506914 (1970-04-01), Albright et al.
patent: 3624504 (1971-11-01), Joly
patent: 3932811 (1976-01-01), Branch
Birch et al.; CPEM Conf. on Precision; pp. 41-43; Jul. 1-5, 1974; London.
Gorden Dale I.
Whitney Eugene C.
Karlsen Ernest F.
Rolinec Rudolph V.
Telfer G. H.
Westinghouse Electric Corp.
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