Various aspects of the present disclosure are directed to a transport device in the form of a planar motor. In one example embodiment, the transport device includes at least one transport segment that forms a transport plane, at least one first transport unit that moves at least two-dimensionally on the transport plane, and a plurality of drive coils arranged on the at least one segment. The transport device further includes at least one first and at least one second magnet group arranged on the at least one first transport unit. Each magnet group has a plurality of drive magnets with a different direction of magnetization arranged one behind the other in a specific arrangement direction with a specific pole pitch. The transport device further includes a first coil group having a first plurality of drive coils, and a second coil group having a second plurality of drive coils.

A rotor (1) with a rotation axis (2) is provided for an electric drive machine (3). The rotor (1) has a plurality of rotor assemblies (4), each of which has a plurality of laminated cores (5) and a number of magnets (7) corresponding to a pole pair arrangement (6). The rotor also has a rotor shaft (8) on which the rotor assemblies (4) are fixed. The rotor assemblies (4) are positioned on the rotor shaft (8) such that they are rectified in accordance with their axial runout (9), while taking into account the pole pair arrangement (6). The rotor can reduce a thermally induced change in imbalance.

A dual-rotor machine comprising a dual rotor support structure rotatably connected to a frame. A stationary stator is disposed between the rotors and is fixed to the frame. An inner rotor and outer rotor, each comprising a permanent magnet Halbach array, are coaxially disposed with the stator and are rotable about the stator. In this configuration, the inner rotor channels its magnetic flux to its outside, while the outer rotor channels its magnetic flux to its inside. The magnetic flux density at the stator for the dual-rotor machine can be as high as 2 Tesla or higher for high-grade neodymium-iron-boron permanent magnet material, and the stored magnetic energy for conversion to mechanical or electrical energy available to the stator may be at least 0.5 kJ/m. The rotor Halbach arrays may comprise monolithic permanent magnets with continuously variable magnetic field direction.

An actuator assembly comprising an output member rotatable about a center axis relative to a structure, a first actuator having a first stator fixed to the structure and a first rotor rotatable about the center axis relative to the first stator, a second actuator having a second stator coupled to the first rotor such that the second stator rotates about the center axis relative to the first stator with rotation of the first rotor about the center axis and having a second rotor rotationally coupled to the output member, a controller configured in a failure mode to drive one of the first actuator or the second actuator to selectively control the rotation of the output member about the center axis with an operational failure of the other of the first actuator or the second actuator.

A magnetic geared rotating electrical machine is provided with a stator, a low-speed rotor which includes a plurality of pole pieces arranged in a circumferential direction of the stator and is installed inside the stator, a high-speed rotor which includes a plurality of second magnets as magnets facing the plurality of pole pieces and is installed inside the low-speed rotor, a first piezoelectric element which is provided in each of the plurality of pole pieces and which converts a vibration into an electric signal, and a control unit which is connected to the first piezoelectric element and performs vibration damping of the pole piece on the basis of an output voltage of the first piezoelectric element.

A dual-rotor machine comprising a dual rotor support structure rotatably connected to a frame. A stationary stator is disposed between the rotors and is fixed to the frame. An inner rotor and outer rotor, each comprising a permanent magnet Halbach array, are coaxially disposed with the stator and are rotable about the stator. In this configuration, the inner rotor channels its magnetic flux to its outside, while the outer rotor channels its magnetic flux to its inside. The magnetic flux density at the stator for the dual-rotor machine can be as high as 2 Tesla or higher for high-grade neodymium-iron-boron permanent magnet material, and the stored magnetic energy for conversion to mechanical or electrical energy available to the stator may be at least 0.5 kJ/m. The rotor Halbach arrays may comprise monolithic permanent magnets with continuously variable magnetic field direction.

An induction motor or generator assembly for converting either of an electrical input or rotating work input to a mechanical or electrical output. An outer annular arrayed component is rotatable in a first direction and includes a plurality of magnets. An inner concentrically arrayed and reverse rotating component exhibits a plurality of outwardly facing and circumferentially spaced array of coil-subassemblies opposing the magnetic elements, such that a gap separates the coil-subassemblies from the magnets. The coil sub-assemblies each include a plurality of concentrically arrayed coils configured within a platform support of the inner component. A drive box including a sleeve shaped trunk and a base, a pair of rotatable wheels supported at annular offset locations of said base and receiving looped ends of a belt, said belt also channeling upper and lower pulley rings associated with said inner and outer components.

The invention relates to a drive device (8) for a motor vehicle (1) having two drivable wheels (6, 7) on a wheel axle (3), said drive device comprising an electric machine (9), which is designed as an asynchronous machine and which has at least one stator (10) and at least one rotor (11, 12), wherein the rotor (11, 12) is or can be operatively connected to at least one of the wheels (6, 7) in order to drive said wheel. According to the invention, the electric machine (9) has two rotors (11, 12), which can rotate independently of one another, each of which is or can be operatively connected to one wheel (6, 7) of the wheel axle (3), and a device for varying the electric rotor resistance of at least one of the rotors (11, 12).

An aero propulsion device includes an electric motor and at least one propeller provided with a plurality of blades and driven in rotation by the electric motor. The device is configured as a “rim drive” such that the electric motor comprises a first rotor of annular shape, with a plurality of the blades connected to the first rotor and arranged internally to form a first propeller.

Embodiments for a torque vectoring unit for an electric vehicle are provided herein. In an example, a torque vectoring unit includes an inner rotor, an outer rotor enclosing the inner rotor, and a stator enclosing the outer rotor, with the inner rotor, the outer rotor and the stator being concentrically arranged to one another. The inner rotor is drivingly connectable to a first wheel and the outer rotor is drivingly connectable to a second wheel, and the inner rotor and the outer rotor represent a first electric motor and the outer rotor and the stator represent a second electric motor.