Motor control system

Details Motor control system Motor control system

1978-08-22

1980-07-01

Rubinson, Gene Z.

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318295, H02P 500

Patent

active

042108519

ABSTRACT:
A motor control system for controlling the speed and direction at which a motor operates. A drive circuit is provided for supplying a drive current to the motor, the magnitude of the drive current being determinative of the speed at which the motor operates. A direction-determining circuit determines the direction at which the motor operates and, for example, may comprise a steering circuit for steering the drive current to the motor in first and second current paths. A potentiometer having a resistance connected between first and second terminals and an adjustable wiper which is settable along the resistance is used to determine the desired speed and direction of operation of the motor. The setting of the wiper includes a predetermined zero speed setting which, preferably, is at some intermediate point along the resistance. A power supply having a power terminal and a reference terminal produces an operating potential across these terminals. The power terminal is coupled to the potentiometer wiper and the reference terminal is coupled to one of the potentiometer terminals. A resistor couples the other potentiometer terminal to the power supply reference terminal. The potentiometer wiper is coupled to the drive circuit and the potentiometer terminal which is coupled to the resistor also is coupled to the direction-determining circuit. The setting of the wiper determines the magnitude of the voltage supplied to the drive circuit so as to determine the motor speed, and the setting of the wiper also determines the magnitude of the voltage supplied to the direction-determining circuit by the potentiometer terminal so as to determine the direction at which the motor operates. Advantageously, only a single source of operating potential need be used with the potentiometer to determine motor direction.

REFERENCES:
patent: 2519339 (1950-08-01), Avery
patent: 2675512 (1954-04-01), Ruhland
patent: 2846632 (1958-08-01), Dudenhausen
patent: 3678354 (1972-07-01), Kitanosono et al.
patent: 3753065 (1973-08-01), Chiles
patent: 3950683 (1976-04-01), Lamson

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