Feedback signal generator for a servo control circuit

Details Feedback signal generator for a servo control circuit Feedback signal generator for a servo control circuit

1975-09-23

1977-09-20

Schaefer, Robert K.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

G05B 106

Patent

active

040500020

ABSTRACT:
Apparatus for generating a feedback signal for effecting rotation of a servo motor precisely in accordance with changes in the input signal and which includes a first annular coil and two angularly positioned coils inductively coupled with the first coil. An alternating current signal is fed to the first coil and the voltages induced into the angularly positioned coils are rectified and subtracted to produce the feedback signal. Variations in the feedback signal are effected by mechanically coupling the shaft of the servo motor with said coils to produce rotation of the first coil relative to said angularly positioned coils. An electronic network is provided to effect rectification and subtraction of the induced AC signals and a corrective network may be included for additional accuracy, if desired.

REFERENCES:
patent: 2093158 (1937-09-01), Pratt
patent: 2094039 (1937-09-01), Kinsley
patent: 2336994 (1943-12-01), MacKay
patent: 3052859 (1962-09-01), Bers
patent: 3771085 (1973-11-01), Hojo et al.

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