Travel of a brushless rotary actuator is limited by two stops, including a wound stator and a magnetic cylindrical rotor rigidly attached to a shaft having a first end rigidly attached to a control member. A second end of the shaft is rigidly attached to a travel limiting part acting as stops, and the travel limiting part has bending, resilient beam shapes. The actuator is electrically controlled in an open-loop. A control system controls a lift value of valves of an internal combustion engine by a lever driven by such an actuator.

Travel of a brushless rotary actuator is limited by two stops, including a wound stator and a magnetic cylindrical rotor rigidly attached to a shaft having a first end rigidly attached to a control member. A second end of the shaft is rigidly attached to a travel limiting part acting as stops, and the travel limiting part has bending, resilient beam shapes. The actuator is electrically controlled in an open-loop. A control system controls a lift value of valves of an internal combustion engine by a lever driven by such an actuator.

A cycloidal reluctance machine includes a stator surrounding a rotor. Stator windings and rotor windings form respective concentric rotor and stator electromagnets. The rotor is eccentrically positioned with respect to the stator to move with two degrees of freedom (2DOF), including rotating motion about a rotary axis of the rotor and orbiting motion about a center axis of the stator. A rotor constraint mechanism (RCM) constrains motion of the rotor, such that the rotor is able to generate and transmit output torque to a coupled load in at least one of the 2DOF. A magnetic field polarity of stator poles and/or rotor poles of the respective stator and rotor changes over one electrical cycle of the polyphase voltage. The coupled load may be a drive axle of a vehicle in some embodiments. In others, the stator and rotor windings are driven via different power inverters.

A vehicle includes a first rotating electric machine, a second rotating electric machine, a power transmission device and an accommodation case. The rotating electric machine accommodation portion and the power transmission device accommodation portion are partitioned by a partition wall. The partition wall includes a first rotating electric machine accommodation wall, a second rotating electric machine accommodation wall, and a step wall which extends in the axial direction from the second rotating electric machine accommodation wall to the first rotating electric machine accommodation wall. The step wall is at least partially overlapped with the second rotating electric machine in the axial direction, and a distance between an outermost diameter portion of the second rotating electric machine and the step wall is shorter than a distance between the outermost diameter portion of the second rotating electric machine and an outermost diameter portion of the first rotating electric machine.

A vehicle includes a first rotating electric machine, a second rotating electric machine, a power transmission device and an accommodation case. The rotating electric machine accommodation portion and the power transmission device accommodation portion are partitioned by a partition wall. The partition wall includes a first rotating electric machine accommodation wall, a second rotating electric machine accommodation wall, and a step wall which extends in the axial direction from the second rotating electric machine accommodation wall to the first rotating electric machine accommodation wall. The step wall is at least partially overlapped with the second rotating electric machine in the axial direction, and a distance between an outermost diameter portion of the second rotating electric machine and the step wall is shorter than a distance between the outermost diameter portion of the second rotating electric machine and an outermost diameter portion of the first rotating electric machine.

An electric motor including a rotor, a stator disposed adjacent to the rotor, and a brake mechanism. The stator is configured to cause a rotational movement of the rotor during operation of the electric motor and the brake mechanism is configured to selectively maintain a stationary rotational position of the rotor against a force exerted by an external source.

An electric motor assembly includes a primary electric motor including a primary rotor assembly and a primary stator assembly configured to be actuated to cause the primary rotor assembly to rotate based on an amount of magnetic flux in the rotor assembly. The assembly also includes a secondary electric motor including a secondary rotor assembly and a secondary stator assembly and a controllable magnetic device coupled to at least one of the primary rotor assembly and the secondary rotor assembly. The assembly also includes a controller configured to actuate the secondary electric motor based on a failure of the primary electric motor, and apply electric current to the controllable magnetic device to reduce back electromotive force (BEMF) caused by rotation of the primary rotor assembly during actuation of the secondary electric motor.

A linear motor comprises a stator, the stator comprising multiple drive coils and an intermediate circuit electrically conductively connected to each drive coil, the intermediate circuit being configured to exchange energy with each drive coil. The drive coils are arranged along the running rail, where at least one slide comprising a magnet acting as a rotor of the linear motor is movably arranged on the running rail. A controller is configured to independently control each drive coil, so that electrical energy is fed from the intermediate circuit into the drive coils, if a measured intermediate circuit voltage is greater or equal to a predetermined intermediate circuit voltage threshold value, where those drive coils are excluded from the feed-in of the electrical energy which are instantaneously being used for driving or braking the at least one slide and/or have a thermal load which exceeds a predetermined thermal load threshold value.

A hybrid drive system can include a shaft, an electrical machine comprising a rotor and a stator, and a mechanical disconnect system connecting the rotor to the shaft. The mechanical disconnect system is configured to mechanically connect the rotor to the shaft in a first state and to mechanically disconnect the rotor from the shaft in a second state such that rotor does not drive the shaft or such that the rotor is not driven by the shaft. The rotor can be a permanent magnet rotor, for example.

The invention relates to an in particular redundant electrical machine for driving a propulsion means with improved protection against failure. The machine includes for example two submachines consisting in each case of a stator winding system and a rotor, wherein the two rotors are arranged on a common shaft in a rotationally fixed manner, by way of which shaft the propulsion means is ultimately set in motion. Also provided is a movement device which has the effect, in the case of a fault in one of the stator winding systems, that the air gap between the stator winding system in question and the associated rotor is increased for the corresponding faulty submachine such that the electromagnetic interaction between these components is suppressed.