Abrégé

The invention relates to a control circuit (3) for an electric motor, in particular for driving a windshield wiper, including a control means (16) comprising an output for controlling the electric motor, the control means being capable of varying the angle of the motor between a given minimum value and maximum value. In particular, the control means (16) comprises an input for receiving a speed set point and is capable of controlling the angular speed of the motor according to the speed set point, the control circuit likewise including a set point means (14) comprising an input for receiving values of the angle of the motor and an output for providing a speed set point to the control means, the set point means (14) being capable of determining the speed set point from a continuous function of the motor angle. The invention likewise relates to a driving mechanism (2) for producing an alternating rotary motion comprising a circuit (3) such as described previously and an electric drive motor (4), as well as to a windshield wiper device (1) including at least one driving mechanism (2) such as described previously and an windshield wiper arm (5) driven by the driving mechanism.

Classes IPC  ?

• B60S 1/08 - Essuie-glaces ou analogues, p. ex. grattoirs caractérisés par l'entraînement entraînés électriquement
• B60S 1/16 - Moyens de transmission pour l'entraînement

Abrégé

The invention relates to a device for determining the operational state of an electro-expulsive deicing system (1) including a current pulse generator (3) and an electro-expulsive mat (2), a sensor (4) connected between the current pulse generator (3) and the electro-expulsive mat (2), a first means (6) for integrating the signal from the sensor (4), a second means (7) for integrating the signal from the first integration means (6), and a determination means (11) receiving, as an input, a signal from the sensor (4), a signal from the first integration means (6) and a signal from the second integration means (7), the determination means (11) being capable of emitting, as an output, a signal depending on the operational state of the electro-expulsive deicing system.

Classes IPC  ?

• B64D 15/16 - Dégivrage ou antigivre des surfaces externes des aéronefs par dispositifs mécaniques, p. ex. des gaines ou des bourrelets fixés ou incorporés à la surface et soumis à des pulsations