Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Patent
1979-10-22
1981-11-10
Truhe, J. V.
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
318592, 318624, 318635, 318674, 318681, G05B 902
Patent
active
043000800
ABSTRACT:
A power driver control circuit (38) provides control signals (44, 46, 48, 50, 52, 54) for switching transistors in a power driver (56) for an electromagnetic actuator (11) of the type used for controlling a servo head (12) in a closed loop servo system. The control circuit includes variable time delay circuits (70, 71) connected to threshold detectors (74, 84) so that dead zones can be created when the servo error signal changes polarity thereby isolating the switches and preventing switch burn-out.
REFERENCES:
patent: 3239735 (1966-03-01), Raider et al.
patent: 3684940 (1972-08-01), Lutz
patent: 3986091 (1976-10-01), Quiogue et al.
patent: 4066945 (1978-01-01), Korte, Jr.
Battjer Eugene T.
Cleaver William E.
Indyk Eugene S.
Schneck, Jr. Thomas
Sperry Corporation
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