Controller for an automatic door system

Details Controller for an automatic door system Controller for an automatic door system

1997-02-27

1998-11-03

Wysocki, Jonathan

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318274, H02P 700

Patent

active

058314032

ABSTRACT:
An automatic door system includes a motor which drives a door to open and close. A CPU operating in accordance with a signal from an encoder operatively coupled to the motor detects the position of the door and prepares and applies a control signal based on the detected door position to a motor drive unit. The motor drive unit alternately drives and brakes the motor. The CPU calculates the speed of the door at a particular door position on the basis of the signal from the encoder and operates to make the door speed equal to the aimed speed for the current door position.

REFERENCES:
patent: 4090113 (1978-05-01), Ogishi
patent: 4342378 (1982-08-01), Hmelovsky
patent: 4563624 (1986-01-01), Kornbrekke et al.
patent: 4713591 (1987-12-01), McCloskey
patent: 4980618 (1990-12-01), Milnes et al.
patent: 5069000 (1991-12-01), Zuckerman
patent: 5278480 (1994-01-01), Murray
patent: 5682023 (1997-10-01), McHugh et al.

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