Precision measurement voltage transducer

Details Precision measurement voltage transducer Precision measurement voltage transducer

1984-05-16

1986-12-09

Beha, Jr., William H.

Electricity: power supply or regulation systems

External or operator controlled

Using a transformer or inductor as the final control device

323356, 324127, G05F 700

Patent

active

046282513

ABSTRACT:
A precision measurement voltage transducer is fed from a reference alternating current source and comprises a transformer and a servo amplifier. The transformer comprises a feedback winding, a magnetizing winding and an output winding. The feedback winding and the magnetizing winding together with the servo amplifier form a feedback control regulating system, which adjusts the input voltage of the servo amplifier to zero. The latter comprises two amplifiers, which according to a first embodiment are connected in series and which according to a second embodiment feed the two poles of the primary winding of a second transformer, the secondary winding of which forms the output of the servo amplifier. According to the first embodiment the second amplifier is provided with a positive and an equally strong negative feedback and according to the second embodiment the transfer ratio of the second transformer equals the amplification factor of the second amplifier.

REFERENCES:
patent: 3881149 (1975-04-01), Kiko
patent: 4054829 (1977-10-01), Searle

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