Method of controlling a motorized window treatment

US7737653B2 · kind B2 · utility

Assignee

• Lutron Electronics Co., Inc. · US

Inventors

• Lawrence R. Carmen, Jr. · Bath, US
• Robert T. Nachtrieb · Lansdale, US
• Thomas W. Brenner · Mertztown, US
• Stephen Lundy · Coopersburg, US
• Jonathan H. Ference · Riegelsville, US
• Justin J. Mierta · Allentown, US

Key dates

• Filing date: Apr 17, 2007
• Grant date: Jun 15, 2010
• Expiry date: Feb 6, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B2219/45015
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method of controlling a motorized window treatment provides for continued operation of the motorized window treatment during an overload condition, a low-line condition, or an electrostatic discharge (ESD) event. The motorized window treatment is driven by an electronic drive unit having a motor, a motor drive circuit, a rotational position sensor, a controller, and a memory for storing the command. The controller stores the present position of the motorized window treatment in the memory each time the rotational position of the motor changes by a predetermined angle, such that a plurality of positions are stored in the memory. When the controller is reset due to an overload condition or ESD event, the controller recalls the desired position from the memory, determines the present position, and continues to drive the motor drive circuit in response to the command and the present position.