Temperature compensated resistance test board

Details Temperature compensated resistance test board Temperature compensated resistance test board

1981-02-12

1984-08-21

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 62, 324105, G01R 3102, G01R 2702

Patent

active

044672799

ABSTRACT:
A test board is provided for resistance testing of dynamoelectric machines, and in particular of the windings of an electric motor, in which a standard resistance value is adjusted automatically for changes in ambient temperature. In the preferred embodiment, the standard value is an input to an electrical comparator. A temperature sensor is positioned to sense ambient temperature and the input from that sensor is used to adjust automatically the standard resistance value for the motor under test. The temperature compensated resistance value also is used to determine a range of values about the standard resistant value at the ambient temperature. The resistance of the motor winding then is obtained and compared with the resistance standard. After comparison, an indication is given to the operator of the device, to show a pass or fail condition.

REFERENCES:
patent: 3241062 (1966-03-01), Baird
Gildersleeve, N. "Nine Performance Tests . . . ", General Electric Review, Aug. 1945, pp. 52-56.

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