Electromechanical actuator comprising a compact and low-noise synchronous reluctance motor

An electromechanical actuator for actuating a blackout device such as a roller shutter or a blind, comprising a casing, a head intended to be fastened to a fixed structure, a synchronous type motor, a speed reducer and a motor control unit, the motor, the speed reducer and the control unit being inserted into the casing of the electromechanical actuator, the motor comprising:

• a cylinder-shaped rotor,
• a cylinder-shaped stator, disposed coaxially about the rotor and including a plurality of teeth extending radially towards the rotor, and
• a coil forming a winding about each of the teeth of the stator,
• wherein:
• the stator has an external diameter smaller than 55 mm,
• the rotor is formed by an assembly of sheet metal plates,
• the rotor comprises recesses about a longitudinal axis of the rotor, the rotor comprising an arrangement of the recesses forming four poles, the rotor comprising two or three recesses per pole formed about a longitudinal axis of the rotor and extending to a cylindrical face of the rotor.