Electricity: motive power systems – Positional servo systems – Pulse-width modulated power input to motor
Patent
1974-06-03
1976-06-08
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Pulse-width modulated power input to motor
318601, 318604, G05B 1128
Patent
active
039626202
ABSTRACT:
A programmer or switching apparatus produces an ON and OFF valued control signal for turning an associated controlled component ON and OFF at preselected points in the variation range of a reference variable. The apparatus includes a reference transducer for converting the reference variable into a reference signal representing the variable. A pair of set-point devices provide a pair of set-point signals which are compared with the reference signal to define operating points at which the control signal switches between its ON and OFF values. The apparatus has the versatility of allowing, by merely setting the set-point devices and without making any circuit changes, the first transition of the control signal to be either from ON to OFF or from OFF to ON as the reference variable increases from its minimum to its maximum value. A number of basic units or parts of basic units may be combined to provide a number of control channels controlling the operation of a number of controlled components in response to the same reference variable. The reference variable may be the angular displacement of a rotatable shaft which may rotate continuously in one direction through repeated revolutions or which may oscillate back and forth between given end points. It may also be the linear displacement of a linearly movable element, or it may be some other continuously variable quantity such as elapsed time, temperature, pressure, liquid level, etc.
REFERENCES:
patent: 2739626 (1956-03-01), Southworth
patent: 3333089 (1967-07-01), Saylor et al.
patent: 3358200 (1967-12-01), Clifford
patent: 3437826 (1969-04-01), Kelley
patent: 3465217 (1969-09-01), Kress
patent: 3470431 (1969-09-01), Jones
patent: 3495775 (1970-02-01), Dicamillo
patent: 3560829 (1971-02-01), Brennan
patent: 3588710 (1971-06-01), Masters
patent: 3686557 (1972-08-01), Futamura
patent: 3789393 (1974-01-01), Tripp
patent: 3795851 (1974-03-01), Gage et al.
Dobeck B.
The Arthur G. Russell Company, Incorporated
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