Control system for power operated door

A drive assembly 10 for a power operated door comprises a DC motor 12 which is drivingly coupled to a torsion spring shaft assembly 13 of the door. The motor is controlled by a control circuit which includes a current sensing device and a microcontroller, the current sensing device causing disabling...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	JOHN EDWARD OAKLEY
Format:	Patent
Sprache:	eng
Schlagworte:	CHECKS FOR WINGS CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS FIXED CONSTRUCTIONS GENERATION KEYS LOCKS SAFES WINDOW OR DOOR FITTINGS WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING
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Beschreibung
Zusammenfassung:	A drive assembly 10 for a power operated door comprises a DC motor 12 which is drivingly coupled to a torsion spring shaft assembly 13 of the door. The motor is controlled by a control circuit which includes a current sensing device and a microcontroller, the current sensing device causing disabling of the motor when a higher than expected current is sensed which is indicative of the fact that either the door has reached its fully opened or closed positions or has encountered an obstruction. The control circuit may comprise a MOSFET connected to a monitoring circuit which monitors the flow of current through the MOSFET. The drive assembly 10 may be powered via a backup DC power supply which is charged by an AC supply through a transformer.