Solid state controller

Details Solid state controller Solid state controller

1976-09-27

1978-09-05

Schaefer, Robert K.

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

318624, G05B 1128

Patent

active

041123425

ABSTRACT:
An improved alternating current prime mover control system and method for, for example, the control of a valve position or other physical variable whose state can be sensed or calculated wherein the state of the physical variable is compared with a reference variable to generate, in conjunction with a waveform generator, a fixed amplitude signal that has variable time duration which feeds a part of the control system that drives the alternating current prime mover source in more than one direction.

REFERENCES:
patent: 3506606 (1970-04-01), Werner
patent: 3639824 (1972-02-01), Malavasi
patent: 3686557 (1972-08-01), Futamura
patent: 3704404 (1972-11-01), Iverson
patent: 3725771 (1973-04-01), Gilmore
patent: 3736486 (1973-05-01), Gould et al.
patent: 3751940 (1973-08-01), Norbeck
patent: 3766409 (1973-10-01), Shuey
patent: 3777188 (1977-12-01), Masur
patent: 3780318 (1973-12-01), Wertz et al.
patent: 3848140 (1974-11-01), Guermeur et al.

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