Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1984-11-16
1987-04-14
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
322 99, G01R 3300
Patent
active
046582134
ABSTRACT:
Method and apparatus for testing D.C. motors, D.C. generators, electromagnetic devices, and the like is disclosed. An electrical circuit produces a current limited, pulsating or otherwise time varying direct current signal which is applied to the device or component under test. The signal induces a return signal in the device or component under test, or in a magnetic sensor placed in proximity to the device or component under test. The return signal is amplified and displayed on an amplifier output display. Novel methods are disclosed which utilize the apparatus to (1) determine and set the neutral plane in a D.C. motor or commutator type generator, (2) locate grounded, shorted, open or crossed coils or bars in an armature of a D.C. motor or a D.C. generator, (3) determine the relative magnetic polarity of the windings of various electromagnetic devices, and (4) detect shorted, grounded, or faulty field windings of various electromagnetic devices, including field coil windings in D.C. motors and generators.
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patent: 4441076 (1984-04-01), Baum
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"Bridge Center-Tap Rectifier Regulator", by Feth, IBM Tech. Dis. Bull., 9/73, vol. 16, #4, p. 1160.
"Grounding and Noise Reduction Practices for Instrumentation Systems", by Scientific Data Systems, Santa Monica, Ca., 1969.
Burns William
Eisenzopf Reinhard J.
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