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.

A rotor for an electric machine of a vehicle. The rotor includes permanent magnets, receptions for the permanent magnets and deformation components. The permanent magnets are adapted to be deformed elastically and are arranged within the receptions, which are designed such that the permanent magnets may deform within the receptions. The deformation components are adapted to deform the permanent magnets such that at least one of a magnetic induction, a conductor length and a rotor radius is adjusted.

An electric generator for a wind turbine is provided including a stator or rotor, the stator or rotor having plurality of winding systems, each winding system covering a respective angular portion of the stator or rotor about an axis of rotation of the electric generator, and a controller for controlling the current flowing in the winding systems. The controller is configured for receiving or determining a thickness of an airgap between the stator and the rotor and controlling the current flowing in at least one of the winding systems so that a respective magnetic radial force is generated, the magnetic radial force acting on the stator and/or rotor for increasing the airgap where the airgap is below a threshold airgap value.

A rotating electric machine includes a rotor and a stator. The rotor includes a plurality of rotor portions provided by circumferentially dividing the rotor. The rotor portions are each movable radially outward. The rotating electric machine is structured such that the rotor portions each move radially outward so as to increase a radial gap between the rotor and the stator.

An internal rotor for an electric machine includes a rotational axis, an outer circumferential face which delimits the internal rotor, a pole arrangement comprising a centroid, and an actuating mechanism for moving the pole arrangement towards the rotational axis or away from the rotational axis to set a first spacing between the outer circumferential face and the centroid. In an example embodiment, the actuating mechanism has an actuator for moving the pole arrangement. The actuator has a hydraulically operable piston, a pneumatically operable piston, an electric motor actuator, or converts an axial force to a radial force. In an example embodiment, the actuating mechanism is operatively connected to the pole arrangement. The actuating mechanism is arranged between the rotational axis and the pole arrangement, or the actuating mechanism is arranged between the outer circumferential face and the pole arrangement.

A turbomachine equipped with an embedded electric machine having a segmented and movable stator is provided. In one aspect, a turbomachine defines a radial direction and includes a rotating component, actuators, and an electric machine. The electric machine includes a rotor assembly rotatable with and operatively coupled with the rotating component. The electric machine also includes a stator assembly having a stator split into stator segments. Each one of the stator segments is movable by one of the actuators between a first position and a second position along the radial direction, the stator segments each being closer to the rotor assembly along the radial direction when in the first position than when in the second position.

An electric machine includes a housing, a rotor including a rotor shaft and a rotor laminated core, and a stator including a stator laminated core with grooves in which stator windings are received, through which a coolant can flow, and wherein a respective tooth of the stator laminated core is arranged between two respective grooves arranged adjacent to one another in a circumferential direction. An annular gap is included between the rotor and stator laminated cores and a tooth head ring arranged in the annular gap, a respective recess of the tooth head ring arranged between two tooth heads of the tooth head ring arranged adjacent to one another in a circumferential direction of the tooth head ring. A wall element is arranged in the annular gap and seals the stator against the rotor such that, from the stator via the annular gap, no coolant moves towards the rotor.

The present invention relates to electrical engineering, particularly to synchronous reluctance machines, and can be used in electrical drives for machines and mechanisms, as well as in electrical power generators. The synchronous reluctance machine comprises a stator with a winding arranged within stator slots, and a rotor mounted to provide a gap between the rotor and the stator, the rotor being rotatable with respect to the stator and comprising radially alternating magnetically permeable layers and flux barriers, wherein each barrier comprises at least one peripheral end extending towards the circumferential rotor surface and the angular pitch of the peripheral ends decreases in circumferential direction from the peripheral ends of the outer barriers towards the peripheral ends of the deepest inner barriers among at least three circumferentially sequential peripheral ends, wherein at least two of said ends are inner barrier ends. This results in improved energy characteristics of the reluctance machine, in particular power factor, efficiency and specific power thereof, for the same number of flux barriers. This is further achieved by a synchronous reluctance machine comprising a stator with a winding arranged within stator slots, and a rotor mounted to provide a gap between the rotor and the stator, the rotor being rotatable with respect to the stator and comprising radially alternating magnetically permeable layers and flux barriers, the gap is increased by 15-400% between the surface of the most external magnetically permeable layer and the stator compared to other sections of the gap.

An electric machine is provided which includes a rotor disk extending along a radial direction and having a rotor flange attached to or formed integrally with the rotor disk and extending substantially along the axial direction. A plurality of rotor magnets are mounted on the rotor disk and positioned against the rotor flange. The electric machine includes a stator assembly including a tracking tooth in magnetic flux communication with the rotor magnets across an air gap. The stator assembly further includes an actuator operable with the tracking tooth to move the tracking tooth along the radial direction to adjust a height of the air gap.

In order to allow for more flexible process control of a transport apparatus in the form of a long stator linear motor, in particular in order to at least intermittently increase the maximum achievable speed of a transport unit without changing the energy-related basic conditions (maximum current or maximum voltage) of the transport apparatus, according to the invention, in order to change a magnetic flux in the magnetic circuit during movement of the transport unit along the transport route, a magnetic reluctance of the magnetic circuit is changed and/or a magnetomotive force of the magnetic circuit is changed on the transport unit.