System for controlling motors for synchronous operation

Details System for controlling motors for synchronous operation System for controlling motors for synchronous operation

1985-12-13

1986-12-16

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Plural servomotors

318616, G05B 1132

Patent

active

046299564

ABSTRACT:
There is disclosed a system for controlling a plurality of motors including a spindle motor of a machine tool to rotate synchronously at command speeds. The system comprises a numerical control unit for generating as positional commands trains of distributed pulses having frequencies corresponding to commanded speeds of rotation respectively for the motors, positional control feedback circuits respectively for the motors for producing speed command outputs from the trains of distributed pulses and detected signals indicative of positions of the motors, and speed control feedback circuits respectively for the motors for controlling the speed of the motors based on the speed command outputs and detected signals indicative of speeds of rotation of the motors.

REFERENCES:
patent: 3838325 (1974-09-01), Kobayashi et al.

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