Abstract: A synchronous electric motor includes a rotor and a stator. The stator includes an armature and coils. The armature includes a yoke and teeth. The teeth define recesses. The coils are mounted in the recesses of the armature. The stator is wound by insertion. Each coil is formed from a wire outside the stator, so that the coils are subsequently inserted into the recesses, through wire passages of the recesses according to a direction radial to a central axis of the stator. Furthermore, a ratio of a surface area of each recess to a thickness of the yoke is between 5 mm and 10 mm, the surface area of each recess being measured in a plane perpendicular to the central axis of the stator.

Abstract: An electromechanical actuator is integrated into a blackout or sun-shading device that includes a screen, top and bottom bars, and top and bottom winding shafts. The screen is between the bars. The top bar is connected to the top winding shaft by first cords. The bottom bar is connected to the bottom winding shaft by second cords. The electromechanical actuator includes first and second transmission devices and an electric motor that drives the shafts. The first transmission device connects to the motor and the top winding shaft and includes a first clutch. The second transmission device connects to the electric motor and the bottom winding shaft and includes a second clutch. When the motor is activated with only one clutch engaged, only one winding shaft is rotated. Moreover, when the motor is activated electrically and the clutches are engaged, the winding shafts are rotated by the motor.

Abstract: This electromechanical actuator configured for controlling screens includes an electronically-commutated, brushless, DC electric motor, a rotor and a stator of the electric motor being positioned coaxially around an axis of rotation, the rotor including a rotor body provided with magnetic elements distributed over the outer surface of the rotor, the magnetic elements of the rotor being surrounded by the stator, the stator being formed by a stator core including a circular peripheral wall and pole elements supporting windings, the pole elements being distributed on the inside of the peripheral wall. The ratio between the outer diameter of the stator and the inner diameter of same is less than 1.7. Further, the ratio between the axial length of the stator and the outer diameter of the stator is greater than 1.5.

Abstract: This electromechanical actuator configured for controlling screens includes an electronically-commutated, brushless, DC electric motor, a rotor and a stator of the electric motor being positioned coaxially around an axis of rotation, the rotor including a rotor body provided with magnetic elements distributed over the outer surface of the rotor, the magnetic elements of the rotor being surrounded by the stator, the stator being formed by a stator core including a circular peripheral wall and pole elements supporting windings, the pole elements being distributed on the inside of the peripheral wall. The ratio between the outer diameter of the stator and the inner diameter of same is less than 1.7. Further, the ratio between the axial length of the stator and the outer diameter of the stator is greater than 1.5.