Position control in a D.C. motor

Details Position control in a D.C. motor Position control in a D.C. motor

1986-05-12

1987-08-25

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Frequency- or phase-modulated systems

318594, 318616, 318314, G05B 102

Patent

active

046895400

ABSTRACT:
A position control system for positioning a D.C. motor at a desired position operates in a speed detection mode in which the D.C. motor is driven to rotate at a predetermined high speed, and in a position detection mode wherein the position of the D.C. motor is precisely controlled. In the speed detection mode, the control circuit forms a phase-locked-loop (PLL) control circuit which compares the phases of the speed instructing pulse signal and the rectangular signal derived from the actual rotation of the D.C. motor. The motor speed is controlled in accordance with the phase difference between the speed instructing pulse signal and the rectangular signal derived from the actual rotation of the D.C. motor.

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