Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1975-06-12
1976-12-28
Segal, Robert
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 54, G01R 3100, G01R 3112
Patent
active
040004643
ABSTRACT:
The invention is directed to an arrangement for detecting ground leaks and includes two identical synchronous machines coupled to the rotor of a brushlessly excited synchronous machine. One of the identical machines is built as an outer-pole machine and the other as an inner-pole machine. The stator winding of the outer-pole machine is supplied with a constant direct current and its rotor winding is connected through a rectifier bridge to be between ground and the neutral point of the rotor of the brushlessly excited synchronous machine. The rectifier feeds the rotor winding of the inner-pole machine, and the voltage measured at the stator winding of the latter is a measure of the insulation resistance in the rotor circuit of the brushless synchronous machine.
REFERENCES:
Deshpande et al., "A New Method . . . ," IEE, Feb. 1959, p. 46.
Karlsen Ernest F.
Segal Robert
Siemens Aktiengesellschaft
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