An electric machine designed as a permanently excited synchronous machine, including a rotor with a rotor body arranged on a rotor shaft, a stator, and a displacement device that generates a relative axial movement between the rotor body and the stator based on a torque produced between the rotor shaft and the rotor body. The displacement device has first and second displacement elements and at least one rolling body arranged between the first and second displacement elements. The first displacement element is axially movable and rotatable to a limited degree on the rotor shaft, and the second displacement element is connected to the rotor shaft rotationally fixed. The displacement elements provide that upon rotation of the first displacement element relative to the second or vice versa, the rotor body is pushed on the rotor shaft axially against the spring force.

The invention relates to a guiding element for use in an electric motor, an electric motor, and a method of installing a rotatable element in an electric motor. The guiding element comprises a guide for a rotatable element of the electric motor. The guide is adapted to radially guide the rotatable element relative to a rotary axis. The guiding element also comprises a centering device adapted to align and/or fix a sensor holding device in the electric motor relative to the guiding element. Moreover, the guiding element comprises a fixing device adapted to fix the guiding element to a housing of the electric motor.

The invention relates to a guiding element for use in an electric motor, an electric motor, and a method of installing a rotatable element in an electric motor. The guiding element comprises a guide for a rotatable element of the electric motor. The guide is adapted to radially guide the rotatable element relative to a rotary axis. The guiding element also comprises a centering device adapted to align and/or fix a sensor holding device in the electric motor relative to the guiding element. Moreover, the guiding element comprises a fixing device adapted to fix the guiding element to a housing of the electric motor.

An electric radial flow machine having a stator, a rotor body connected to a rotor shaft, and a spring element which applies a spring force to the rotor body in the axial direction such that in a first operating position, the rotor body is held in an axial position in which the overlap between opposing surfaces of the rotor body and the stator is less than 100%. A displacement device with first and second displacement elements generates an axial movement between the rotor body and the stator against the spring force using a torque produced between the rotor shaft and the rotor body so that in the event of a rotation of the first displacement element relative to the second displacement element or vice versa, the rotor body is pushed on the rotor shaft axially against the spring force.

An actuator comprises a coil, a first cooling plate and a second cooling plate. The cooling plates are configured to cool the coil. The first and second cooling plates are arranged at opposite sides of the coil to be in thermal contact with the coil. The coil comprises a first coil part and a second coil part, the first coil part facing the first cooling plate and the second coil part facing the second cooling plate, the first and second coil parts being separated by a spacing there between. The first cooling plate, the first coil part, the spacing, the second coil part and the second cooling plate form a stacked structure whereby the coil parts are arranged between the cooling plates and the spacing is arranged between the coil parts. The actuator further comprises a filling element arranged in the spacing. The filling element to push the first coil part towards the first cooling plate and to push the second coil part towards the second cooling plate.

An actuator comprises a coil, a first cooling plate and a second cooling plate. The cooling plates are configured to cool the coil. The first and second cooling plates are arranged at opposite sides of the coil to be in thermal contact with the coil. The coil comprises a first coil part and a second coil part, the first coil part facing the first cooling plate and the second coil part facing the second cooling plate, the first and second coil parts being separated by a spacing there between. The first cooling plate, the first coil part, the spacing, the second coil part and the second cooling plate form a stacked structure whereby the coil parts are arranged between the cooling plates and the spacing is arranged between the coil parts. The actuator further comprises a filling element arranged in the spacing. The filling element to push the first coil part towards the first cooling plate and to push the second coil part towards the second cooling plate.

Disclosed is a device with a stator and a rotor, the device comprising: a stator; a rotor, wherein an air gap is provided between the rotor and the stator, and an air gap protection device fixedly connected to the stator, wherein the radial distance between the air gap protection device and the rotor is less than the radial distance between thy stator and the rotor, and the air gap protection device rotates relative to the rotor when in contact with the rotor. By arranging the air gap protection device fixedly connected to the stator, the air gap protection device can rotate relative to the rotor when in contact with the rotor, and the radial distance between the air gap protection device and the rotor is less than the radial distance between the stator and the rotor.

Disclosed is a device with a stator and a rotor, the device comprising: a stator; a rotor, wherein an air gap is provided between the rotor and the stator, and an air gap protection device fixedly connected to the stator, wherein the radial distance between the air gap protection device and the rotor is less than the radial distance between thy stator and the rotor, and the air gap protection device rotates relative to the rotor when in contact with the rotor. By arranging the air gap protection device fixedly connected to the stator, the air gap protection device can rotate relative to the rotor when in contact with the rotor, and the radial distance between the air gap protection device and the rotor is less than the radial distance between the stator and the rotor.

The disclosure provides a drive device including a gear, a bearing, and a motor rotor. The gear includes an installation hole. The bearing is disposed in the installation hole of the gear and includes a rotation hole, a sliding groove, and a drive assembly. The sliding groove communicates with the rotation hole, and the drive assembly is movably disposed in the sliding groove. The motor rotor rotatably passes through the rotation hole of the bearing. The drive assembly is moved to lock the bearing by the rotation of the motor rotor, and the torsion force of the motor rotor is transmitted to the gear through the bearing.

Examples include an actuator that includes a rotor that includes a permanent magnet; a stator that at least partially surrounds the rotor; a plurality of electromagnets coupled to the stator that are configured to apply magnetic force to the permanent magnet to rotate the rotor; a first lock that (i) has a first mechanical bias to engage the rotor and prevent rotation of the rotor when the rotor is in a home position and (ii) is configured to disengage the rotor against the first mechanical bias while receiving a first control signal; and a second lock that (i) has a second mechanical bias to disengage the rotor and (ii) is configured to engage the rotor against the second mechanical bias to prevent rotation of the rotor while receiving a second control signal.