Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1973-08-13
1976-08-03
Rolinec, R. V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324158R, G01R 2300
Patent
active
039731901
ABSTRACT:
An infralow frequency controlled-member transfer function analyzer comprises an electromechanical infralow frequency generator, a rotary transformer mechanically coupled to the output shaft of the electromechanical infralow frequency generator, a matching amplifier, two modulators similar to each other, a differentiator connected to the output of the matching amplifier and through one modulator to one rotor winding of the rotary transformer, a matching filter connected to the output of the matching amplifier in parallel with the differentiator and through the second modulator to the other rotor winding, an A.C. voltage amplifier connected to one stator winding of the rotary transformer and to a servomotor which drives the rotary transformer stator carrying a means indicating the phase angle of the signal at the output of the plant under investigation, an indicating instrument connected through a switch to the other stator winding of the rotary transformer, and a second rotary transformer the stator of which is mechanically coupled to the stator of the first rotary transformer while its stator windings are alternately connected through a switch to the indicating instrument. One rotor winding is connected to a matching resistor and the other rotor winding, to the second stator winding of the first rotary transformer.
REFERENCES:
patent: 3611129 (1971-10-01), Simurda
Karlsen Ernest F.
Rolinec R. V.
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