Method of determining the position of the shaft of a drive motor for a roller blind
AssigneeSiminor Technologies Castres Sarl
InventorJacques Marty
Life of this patent
Estimating the term…
Abstract
The method of determining the position of the shaft of a direct current motor including an armature powered via brushes and a bar commutator and designed to drive a roller blind includes the following phases: detecting and counting the commutations that occur between the brushes and the commutator bars to determine the position of the motor shaft when the commutation count is valid, and measuring the back electromotive force of the motor to determine the position of the motor shaft when the commutation count is not valid.
Claims13
A method of determining the position and/or the speed of the shaft of a direct current motor (MOT) including an armature powered via brushes and a bar commutator and designed to drive a moving element (LD) of a building, which includes the following phases:
- detecting and counting the commutations that occur between the brushes and the commutator bars to determine the position and/or the speed of the motor shaft when the commutation count is valid, and
- measuring the back electromotive force of the motor (MOT) to determine the position and/or the speed of the motor shaft when the commutation count is not valid.
An actuator (ACT) for operating a moving element (LD) of the building, including:
- a direct current motor (MOT) with an armature powered via brushes and a bar commutator, and
- means of counting commutations between the brushes and the bars of the commutator, which includes means of measuring the back electromotive force of the motor and means of inhibiting the use of the commutation counting means or the use of the means of measuring the back electromotive force of the motor to calculate the position and/or the speed of the motor shaft.
Dependencies are inferred from the claim text.