Abstract: The invention relates to an electric machine comprising a rotor and a stator. The rotor (40, 4) comprises a plurality of permanent magnets (4), the stator comprises a plurality of coils suitable for being powered by an electric current and two Hall effect sensors (6) on supports (60). The sensors are configured to detect a change in gradient of the normal component of a magnetic field generated by the permanent magnets (4). The stator comprises a part (7) comprising —a first zone (7a), —a second zone (7b), and a third zone (7c) extending from the first zone (7a) up to the second zone (7b). The maximum radial thickness of the third zone (7c) is less than the minimum radial thickness of the first zone and the second zone.

Abstract: The invention relates to an electric machine comprising a rotor and a stator. The rotor (40, 4) comprises a plurality of permanent magnets (4), the stator comprises a plurality of coils suitable for being powered by an electric current and two Hall effect sensors (6) on supports (60). The sensors are configured to detect a change in gradient of the normal component of a magnetic field generated by the permanent magnets (4). The stator comprises a part (7) comprising —a first zone (7a), —a second zone (7b), and a third zone (7c) extending from the first zone (7a) up to the second zone (7b). The maximum radial thickness of the third zone (7c) is less than the minimum radial thickness of the first zone and the second zone.

Abstract: A control device for controlling an electric motor, the device comprising an inverter and a control module implementing a current servo-control loop for the electric motor; an excitation module producing an excitation signal; a synchro-transmitter comprising two coupling windings, an excitation winding constrained to rotate with a rotor of the electric motor, and three measurement windings, the excitation signal being applied to the excitation winding via the two coupling windings; three first synchronous demodulators, each connected to a respective one of the three measurement windings of the synchro-transmitter and to the excitation signal I, and each generating a current setpoint for the current servo-control loop for use by the control module; and three other synchronous demodulators, each connected to a respective one of the three measurement windings of the synchro-transmitter and to the excitation signal Q, and generating a signal providing information about the angular speed of the rotor of the motor

Abstract: A method is provided for characterizing the amplitude of play in an electromechanical actuator comprising an electric motor, a movable element, an upstream sensor, a downstream sensor, and a force sensor. The method includes steps of measuring the position of the motor, the position of the movable element and the load applied to the movable element using the three sensors. On the basis of a computer model of the actuator and of the measurements, a value of the amount of mechanical play is estimated using a state observer considering the play to be a state component. The amplitude of the play is determined from a set of values of the dynamic variable obtained in the preceding step at various times.

Abstract: A control device for controlling an electric motor, the device comprising an inverter and a control module implementing a current servo-control loop for the electric motor; an excitation module producing an excitation signal; a synchro-transmitter comprising two coupling windings, an excitation winding constrained to rotate with a rotor of the electric motor, and three measurement windings, the excitation signal being applied to the excitation winding via the two coupling windings; three first synchronous demodulators, each connected to a respective one of the three measurement windings of the synchro-transmitter and to the excitation signal I, and each generating a current setpoint for the current servo-control loop for use by the control module; and three other synchronous demodulators, each connected to a respective one of the three measurement windings of the synchro-transmitter and to the excitation signal Q, and generating a signal providing information about the angular speed of the rotor of the motor

Abstract: The invention relates to a method of monitoring an electromechanical actuator system, the method comprising the steps of estimating the voltage drop in the power supply to the motor associated with defects of the inverter by means of a Kalman filter, estimating (300) at least the electromagnetic torque coefficient of the motor by taking account of the estimated voltage drop, and calculating (400) the electromagnetic torque of the motor from the electromagnetic torque coefficient of the motor.

Abstract: The invention relates to a rotation sensor, comprising: —a stator (A) and rotor (B), arranged coaxially and forming a magnetic circuit (10, 20), the rotor being mounted angularly displaced with respect to the stator, —a primary winding, suitable for generating a magnetic field in the magnetic circuit, and —at least one secondary winding, characterized in that the magnetic circuit comprises at least one tooth (220) extending radially with respect to the axis (X-X) of the stator and of the rotor, and at least one notch (12) suitable for receiving said tooth, such that the tooth is separated from the notch by at least one tangential air gap (51) that is variable according to the angular displacement of the rotor with respect to the stator, the tooth and the notch being shaped so that, during a rotation of the rotor with respect to the stator, a variation in the width of the tangential air gap causes an increase or a decrease in the permeance of the air and, respectively, an increase or a decrease in the voltage

Abstract: The invention proposes a method for characterizing the amplitude (AS) of play (S(t)) in an electromechanical actuator (10), the electromechanical actuator comprising an electric motor (11) and a movable element (1) that is able to be moved by the motor, the actuator (10) comprising an upstream sensor (41) suitable for measuring a position (Xl(t)) of the motor and a downstream sensor (42) suitable for measuring a position (X2(t)) of the movable element, and a force sensor (43) suitable for measuring a load (Fl(t)) applied to the movable element, the method comprising steps of: (El) measuring the position (Xl(t)) of the motor, the position (X2(t)) of the movable element and the load (Fl(t)) applied to the movable element using the three sensors; (E2) on the basis of a computer model of the actuator and of the measured position (Xl(t)) of the motor, of the measured position (X2(t)) of the movable element and of the measured load (Fl(t)) applied to the movable element, estimating a value of the amount of mechanic

Abstract: An electric motor stator wherein an annular central part and a yoke surrounding the central part, the central part includes a bundle of laminations delimiting poles, wherein the bundle of laminations includes a plurality of first laminations each containing portions forming a pole part that are joined by an annular internal portion, second laminations each forming a pole part being mounted between the first laminations, the first laminations being spaced apart from one another at a predetermined spacing according to a required inductance.

Abstract: The invention relates to a method of monitoring an electromechanical actuator system, the method comprising the steps of estimating the voltage drop in the power supply to the motor associated with defects of the inverter by means of a Kalman filter, estimating (300) at least the electromagnetic torque coefficient of the motor by taking account of the estimated voltage drop, and calculating (400) the electromagnetic torque of the motor from the electromagnetic torque coefficient of the motor.

Abstract: A magnet motor has a stator formed from a laminated core provided with windings to form phases and a rotor provided with magnets distributed angularly around at least one section of the rotor and pivotably received in the housing of the stator. The stator has a length greater than a length of said section of the rotor and the rotor is provided with at least one ring made from magnetic material that adjoins said section and is received in the housing of the stator. A drive device having a plurality of motors and a method for producing such a motor are also provided.

Abstract: A rotation-blocking device including a stator, a rotor, at least one blocking element mounted between the stator and the rotor to be movable between a position of interaction with the rotor and the stator and a position retracted relative to the rotor, and actuator means including a coil wound on the stator and connected to a control unit to power the coil so as to create a magnetic field, the blocking element being made of a material sensitive to the magnetic field in such a manner that powering the coil causes the blocking element to move towards one of its positions. A rotary actuator including such a device.

Abstract: An electromechanical actuator comprising a body and an electric motor driving at least one motion transmission element connected to the body via a brake device, a mechanical torque limiter with rollers, and a unidirectional transmission member, the brake device including an electrical activator member so that when the activator member is powered, the unidirectional transmission member is released relative to the body, and when the activator member is not powered, the unidirectional transmission member is secured to the body and opposes pivoting of the transmission element in one direction of rotation up to a maximum transmissible torque defined by the torque limiter.

Abstract: An electric motor rotor including a magnetic core, magnets fastened to the periphery of the magnetic core, and a wire wound with touching turns around the magnetic core and the magnets. The wire includes a metal core surrounded by an electrically insulating layer, itself covered by an outer sheath of thermo-adhesive material, the turns being fastened to one another by adhesion between mutually contacting portions of the outer sheath. A method of fabricating such a rotor. An electric motor including such a rotor.

Abstract: The invention relates to a rotation sensor, comprising:—a stator (A) and rotor (B), arranged coaxially and forming a magnetic circuit (10, 20), the rotor being mounted angularly displaced with respect to the stator,—a primary winding, suitable for generating a magnetic field in the magnetic circuit, and—at least one secondary winding, characterized in that the magnetic circuit comprises at least one tooth (220) extending radially with respect to the axis (X-X) of the stator and of the rotor, and at least one notch (12) suitable for receiving said tooth, such that the tooth is separated from the notch by at least one tangential air gap (51) that is variable according to the angular displacement of the rotor with respect to the stator, the tooth and the notch being shaped so that, during a rotation of the rotor with respect to the stator, a variation in the width of the tangential air gap causes an increase or a decrease in the permeance of the air and, respectively, an increase or a decrease in the voltage at

Abstract: An electromechanical actuator comprising a body and an electric motor driving at least one motion transmission element connected to the body via a brake device, a mechanical torque limiter with rollers, and a unidirectional transmission member, the brake device including an electrical activator member so that when the activator member is powered, the unidirectional transmission member is released relative to the body, and when the activator member is not powered, the unidirectional transmission member is secured to the body and opposes pivoting of the transmission element in one direction of rotation up to a maximum transmissible torque defined by the torque limiter.

Abstract: A rotation-blocking device including a stator, a rotor, at least one blocking element mounted between the stator and the rotor to be movable between a position of interaction with the rotor and the stator and a position retracted relative to the rotor, and actuator means including a coil wound on the stator and connected to a control unit to power the coil so as to create a magnetic field, the blocking element being made of a material sensitive to the magnetic field in such a manner that powering the coil causes the blocking element to move towards one of its positions. A rotary actuator including such a device.

Abstract: A magnetic hysteresis brake includes a stator equipped with at least one control coil and a rotor mounted to be mobile facing poles of the stator, wherein the brake includes at least one magnet mounted on the stator facing the rotor and having a sufficient power to locally generate, in the rotor, a level of induction substantially equal to a maximum level of induction generated by the coil when the latter is powered.

Abstract: An electric motor having a stator defining a number N, at least equal to two, of pairs of poles and a rotor mounted to pivot in the stator. The motor has a number n of electric circuits each defining two windings mounted on poles of the stator, the windings of all the circuits being substantially identical to each other, the number n of electric circuits being greater than the number N of pairs of poles and at least first and second electric circuits being mounted on a first of the pairs of poles and a third of the electric circuits being mounted on a second of the pairs of poles.

Abstract: An electric motor stator wherein an annular central part and a yoke surrounding the central part, the central part includes a bundle of laminations delimiting poles, wherein the bundle of laminations includes a plurality of first laminations each containing portions forming a pole part that are joined by an annular internal portion, second laminations each forming a pole part being mounted between the first laminations, the first laminations being spaced apart from one another at a predetermined spacing according to a required inductance.