A motor comprising a shaft, an array of stator assemblies rigidly attached to the shaft, each stator assembly includes a stator yoke having a toroid shape fixed around the shaft and having a number of slots at radial and axis directional faces with windings within the slots of the stator yoke, and a rotor assembly rotatively attached to the shaft to enclose the array of stator assemblies, the rotor assembly has a rotor drum with sections, each section embraces one stator assembly, each section has two axial-flux permanent magnet arrays attached on axial-directional inner surfaces of the section and has one radial-flux permanent magnet array attached on a radial-directional inner surface of the section furthest from the shaft, wherein the axial-flux and the radial-flux permanent magnet arrays with the number of pole pairs equals the number of the stator slots plus or minus the number of stator winding pole pair.

In a method for operating an electric machine with at least two coils and a magnetizable, movable core such as an armature or a rotor, a current of a constant average value is applied from a direct current source at the coils in such a way that the device is operated in the magnetic saturation range of the core. More particularly, one linear and one rotational actuator is proposed for such an operating mode.

A rotor carrier for an electric machine having a sleeve-shaped receiving region and at least one flange-like carrier region connected to a hub or shaft. The receiving region has on its outer circumferential surface at least one driving groove extending in axial direction, and a plurality of radial oil bore holes are provided in the receiving region so as to be distributed over the circumference. An encoder wheel having a nonmagnetic material is provided at an axial end of the rotor carrier, and in that the encoder wheel protrudes over the receiving region in radial direction to serve as an axial limit for a rotor lamination stack.

A motor unit includes a motor including a rotor including a shaft, and configured to rotate about a motor axis extending in a horizontal direction, and a stator located radially outside of the rotor; a housing including a housing space to accommodate the motor; an oil passage configured to circulate an oil in the housing space to cool the motor; a gear portion connected to the shaft on one side in an axial direction of the motor axis; and a pump arranged in the oil passage and arranged to the housing. The housing includes a partition arranged to divide a gear chamber to accommodate the gear portion and a motor chamber to accommodate the motor. The partition includes a second connection hole portion opened on the other side in the axial direction toward an inside of the motor chamber.

An electric motor includes a rotor shaft, a first bearing, and a second bearing. The rotor shaft includes a first rotor shaft part and a second rotor shaft part, the first rotor shaft part being rotatably mounted via the first bearing, and the second rotor shaft part being rotatably mounted via the second bearing. A bellows is connected at its first axial end region to the first rotor shaft part, e.g., by welding, and the bellows is connected at its second axial end region to the second rotor shaft part, e.g., by welding.

A rotary electric machine includes a rotor and a stator. The stator has windings and teeth extending radially from a stator core. Each tooth is separated from an adjacent tooth by a stator slot that opens to a radial stator-rotor airgap via a slot opening. The windings are positioned within each slot. Each stator tooth has a tooth tip with a surface profile configured to guide rotor flux away from areas of the windings proximate the respective slot opening. The tip surface profile may be a concave region, e.g., a dent/chamfer, and/or a convex region, e.g., a bump/bulge, and is formed in a distal end surface of the tip proximate the opening. The stator-rotor airgap is smaller at the convex region and larger at the concave region than elsewhere along the distal end surface. An electrical system includes the machine, a battery, and a power inverter module.

A generator for a direct driven wind turbine configured to convert kinetic energy of a main shaft of the wind turbine into electrical energy. The generator includes a generator rotor connectable to the main shaft of the wind turbine and a generator stator, the generator includes a generator housing on which the generator stator is arranged. The generator housing includes a front side facing towards a rotor head of the wind turbine in an installed state of the generator and a rear side facing away from the rotor head in the installed state of the generator. The generator includes at least one front generator bearing arranged at the front of the generator housing and a rear generator bearing arranged at the rear of the generator housing.

A power transmission set for tractioned axles of vehicles. The power transmission set includes at least one coupling/uncoupling device, a selector unit, a primary shaft, and a secondary shaft. The shafts are interconnected by the selector unit to select and control a type of motor propulsion applied to a tread axle of a vehicle. The shafts cooperatively with the coupling/uncoupling device are configured to provide a configuration in which only a combustion engine is responsible for propulsion; in which only an electric motor provides propulsion; in which both the combustion engine and the electric motor work together to generate torque; or in which the tread axle is uncoupled from the combustion engine and the electric motor and the combustion engine provides power to the electric motor to generate electricity. A vehicle for the transport of cargo and passengers including the power transmission set.

Provided is a vehicle power device (1) including: a wheel bearing (2); and a driving motor (3) that can rotationally drive an outer ring (4) as a rotary ring. The vehicle power device further includes a bracket (24) attached to a knuckle (8) of a vehicle. The bracket (24) includes a bracket base portion (24a) and a bracket cylindrical portion (24b), the bracket base portion interposed between the knuckle (8) and an inner ring (5) wherein the inner ring (5) is removably fixed, the bracket cylindrical portion (24b) extending from the bracket base portion (24a) toward an outboard side. The driving motor (3) includes a stator (18) removably attached to an inner periphery of the bracket cylindrical portion (24b) and a rotor (19) attached to the outer ring (4) on an inner periphery of the stator (18).

A method for constructing a rotor assembly for use with a rotary electric machine includes forming annular rotor laminations from metal blanks. Each lamination has a radial axis and an outer diameter surface. Multiple magnet web regions are defined in proximity to the outer diameter surface. Each web regions includes asymmetrical openings defined by a radially-extending strut and arcuate peripheral bridges. The method includes coaxially stacking the laminations into a rotor stack, including positioning every other lamination a predetermined angular distance with to unmask the bridges and/or struts and mask remaining surface area of the laminations. The rotor stack is subjected to a heat-treating process to harden only the unmasked bridges and/or struts. The method includes connecting a rotor shaft to the stack to construct the rotor assembly, with the web regions corresponding to a respective rotor magnetic pole.