Stepper motor door control apparatus and method

Details Stepper motor door control apparatus and method Stepper motor door control apparatus and method

H - Electricity

02

K

342/40, 342/22.1

H02K 29/06 (2006.01) E05F 15/10 (2006.01) H02H 7/085 (2006.01) H02P 8/20 (2006.01)

Patent

CA 1226354

18 ABSTRACT OF THE DISCLOSURE 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 pro- vided is made to determine when a closing door is obstructed.

476150

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