A stator assembly (12) for use with a brushless geared motor assembly (10), including: two plastic parts (28, 30) located on each end of a core of the stator assembly, at least one of the plastic parts (28, 30) including several protruding parts (74) configured to fit into complementary slots of the stator core, wherein the protruding parts (74) are cut at corners (76) in order to provide flexibility to the protruding parts (74).

A coaxial pump or turbine module includes an integral, modular motor or generator comprising a magnet structure containing radial or axial permanent magnets and/or induction coils detachably fixed to a rotor, and a stator housing detachably fixed to the module housing. Working fluid is directed axially through a flow path symmetrically distributed within an annulus formed between the module housing and the stator housing. The stator housing can be cooled by the working fluid, or by a cooling fluid flowing between passages of the flow path. The flow path can extend over substantially a full length and rear surface of the stator housing. A plurality of the modules can be combined into a multi-stage apparatus, with rotor speeds independently controlled by corresponding variable frequency drives. Embodiments include guide vanes and/or diffusers. The rotor can be fixed to a rotating shaft, or rotate about a fixed shaft.

A compressor has: a motor that has a stator provided around an axis of a rotor; a rotating shaft that is fixed to the rotor; a bearing that supports the rotating shaft; an impeller that is connected to the rotating shaft and compresses fluid; and a casing that accommodates the motor. In this compressor, the stator has: a coil that encircles the axis of the rotor; and a stator core that has a magnetic pole facing, in a radial direction of the rotor, an outer circumferential surface of the rotor, via a gap.

A wheel assembly for a vehicle includes a wheel drive having a housing defining an internal volume, an annular rim ring circumferentially disposed about, extending radially through, and rotatable with respect to the housing, a hollow support cylinder extending along a rotational axis of the wheel assembly, and a motor disposed within the internal volume, the motor having a rotor anchored to the rim ring, and a stator disposed radially within the rotor and anchored to the hollow support cylinder, the stator directly abutting and radially supporting the rotor. The wheel assembly further includes a wheel having a rim and a disc, and a tire mounted on the rim. The disc of the wheel is secured to the rim ring such that the rotor, the rim ring, the wheel, and the tire are rotatable about the axis.

An inner-rotor motor including: an armature assembly including a rotating shaft, an armature unit coupled to the rotating shaft and a pressing unit; a frame assembly including a frame housing the armature unit, a first bearing unit located on one side with respect to the armature unit in an axial direction, and a second bearing unit located on another side with respect to the armature unit in the axial direction; and an urging structure that urges the rotating shaft in a direction away from the second bearing unit and that presses the pressing unit toward the first bearing unit.

A motor includes a stator with a stator core, an insulator, coils, and a terminal pin. The stator core includes an annular core back and teeth. The teeth extend radially outward from the core back and are arranged in the circumferential direction. The coil is defined by a conductive wire wound around a tooth via the insulator. The conductor is connected to the conductive wire and is connected to the circuit board. The insulator includes a cylindrical terminal holder located between adjacent ones of the teeth, extends in the axial direction, and accommodates the conductor. The core back includes a stator recess located between adjacent ones of the teeth and is recessed radially inward from the radially outer surface. The stator recess accommodates at least a portion of the terminal holder.

An electrical machine includes a stator with a stator body supporting an electrical stator and a rotor. The rotor is supported by a bearing having a radial bearing section forming a radial gas bearing and an axial bearing section forming an axial gas bearing, the stator side parts of these bearing sections being a stator side radial bearing part and a stator side axial bearing part that are rigidly connected to one another and together form a stator bearing structure. The stator bearing structure is mounted to the other parts of the stator by either the stator side radial or axial bearing part being rigidly mounted to these other parts, and the other bearing part are connected to these other parts by an elastic support or not at all.

A gear device includes a housing, a cover, and a gear. The cover covers an opening of the housing. The gear is accommodated in the housing. One of the housing and the cover includes a projection projected toward the gear and having a center axis that extends along a rotation axis of the gear. The gear includes a recess that receives the projection.

The present disclosure describes a mover of a linear motor system. The mover includes a housing and a material coupled to the housing, the material having one or more protrusions extending towards a track of the linear motor system. The mover also includes a bearing to interface with the track. The bearing includes one or more recesses extending from a first surface of the bearing toward a second surface of the bearing, opposite the first surface. Each of the one or more recesses receives a respective protrusion of the one or more protrusions of the material. The bearing wears away from the second surface over time as the mover travels along the track, exposing the one or more protrusions to the track.

An electrical machine has a stator with a stator body supporting an electrical stator and a rotor. The rotor is supported by bearing including a radial bearing section forming a radial gas bearing and an axial bearing section forming an axial gas bearing, the stator side parts of these bearing sections being a stator side radial bearing part and a stator side axial bearing part that are rigidly connected to one another and together form a stator bearing structure. The stator side radial bearing part is a bushing, and is radially surrounded by a cooling body. The bushing is connected to the cooling body by an elastic support comprising a thermally conducting filler.