Servo motor apparatus

Details Servo motor apparatus Servo motor apparatus

1978-10-13

1981-03-24

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Multiple mode systems

318599, 318603, G05B 1118

Patent

active

042583012

ABSTRACT:
A theoretically optimum motor drive time period or drive pulse width is computed as a function of the number of steps from the present motor shaft position to the desired command position and the present motor shaft rotational speed. A compensation factor is computed as a function of the present motor shaft speed and the torque-speed characteristic of the motor (12) and multiplied by the computed drive time period to produce a present drive time period for energization of the motor (12) for rotation of the motor shaft (14) from the present position to the next step position. After the motor shaft (14) has been rotated to within one step of the command position, sensor means (18') sense displacement of the motor shaft (14) in excess of a predetermined small angular distance from the command position and cause the motor (12) to be energized to rotate the motor shaft (14) toward the command position.

REFERENCES:
patent: 3370289 (1968-02-01), Hedgcock et al.
patent: 3378741 (1968-04-01), Sutton
patent: 3752969 (1973-08-01), Kiffmeyer et al.
patent: 3962620 (1976-06-01), Dion

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