Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...
Patent
1976-04-08
1979-10-30
Rubinson, Gene Z.
Electricity: motive power systems
Positional servo systems
With particular motor control system responsive to the...
318696, 318138, 318254, G05B 1940
Patent
active
041729900
ABSTRACT:
A control system moves an inductively controlled multi-phase motor in a forward or reverse direction. The motion may be in steps or it may be a continuous rotation. A microprocessor under the control of a ROM operates through an integrated input/out device to provide control signals for the motor.
In the step mode of operation, a high current level is induced in the next motor phase so as to accelerate the motor toward the next detent position. After the motor has traversed a predetermined percentage of the distance to the next detent position, as indicated by a sensor, a high current level is induced in the lagging phase of the motor so as to provide a decelerating torque. After a predetermined time, the high current is switched from the lagging to the leading phase to cause the motor to reach the next detent position, after which the current in the new detent phase is reduced to a holding level.
In the continuous mode of operation, a high level current is caused to switch from phase to phase, thereby causing the motor to rotate in a desired direction. The time between switching instants is preselected to result in a desired rotational velocity. When it is desired to stop the continuous rotation of the motor, the times between switching instants are gradually increased, thereby causing the motor to decelerate to a smooth stop.
REFERENCES:
patent: 3573593 (1971-04-01), Beery
patent: 3813592 (1974-05-01), Ryberg
patent: 3863118 (1975-01-01), Lander et al.
patent: 3942619 (1976-03-01), Nordstrom et al.
"System Architecture for Large Scale Integration," Beelitz et al., AFIPS Conference Proceedings, vol. 31, pp. 185-200, 1968.
Everett Mickey H.
Flannigan J. Steven
Devine Thomas G.
Grossman Rene E.
Indyk Eugene S.
Rubinson Gene Z.
Sharp Melvin
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