Stepper motor door control apparatus and method

Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...

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Details

318696, 83369, H02K 2904

Patent

active

045118329

ABSTRACT:
A door movement control apparatus and method are provided for opening and closing door apparatus with a stepper motor supplied control pulses in response to a command signal indicating the desired movement direction. A table of time delays for the respective control pulses and resulting motor steps provides a desired speed pattern for the door movement. A comparison of the number of motor steps taken with the number of control pulses provided is made to determine when a closing door is obstructed.

REFERENCES:
patent: 4106685 (1978-08-01), Strunc et al.

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