Provided is a stator that can easily attach a coil to a tooth and that can reduce concentration of stress generated in the core during the operation. The stator includes a core with an annular back yoke, and a plurality of teeth; and a coil wound around each of the plurality of teeth. The core includes a plurality of divided cores each of which having a divided back yoke. A connecting surface is arranged at an end on a second circumferential side of the divided yoke, the connecting surface being a plane or a convex surface extending from a side surface on the second circumferential side of the tooth to an outer circumferential surface of the divided back yoke.

A stator includes a stator core including stator poles and a yoke connecting the stator poles, at least one winding wound around the stator core and connecting terminals configured to connect with an external power source to supply power to the winding and located at one end of the yoke adjacent the stator poles. A single phase motor and a ventilation fan are also provided.

A stator core includes an end portion, a first pole arm, and a second pole arm. The first pole arm includes two first connecting arms extending from the end portion and spaced from each other, and two first pole claws respectively formed at ends of the first connecting arms. The first pole claws are spaced from each other with an opening formed there between. The second pole arm includes two second connecting arms axially stacked to the two first connecting arms respectively and two second pole claws respectively formed at distal ends of the two second connecting arms. The two second connecting arms are connected with each other.

A motor, a pump and a cleaning apparatus are provided. The motor includes a stator and a rotor rotatable relative to the stator. The stator includes a stator core and stator windings wound around the stator core. The stator core includes a pair of opposing poles and a yoke connected between the poles. Each pole has a pole arc surface facing the rotor, with an air gap formed between the pole arc surface and the rotor. The pair of poles includes opposing circumferential end portions spaced apart from each other, and a ratio of a distance between the circumferential end portions to a minimum width of the air gap between the pole arc surface and the rotor is less than 2.

A rotary reciprocating drive actuator includes an assembled magnetic member has a rectangular shape surrounding the movable member in a plane orthogonal to the axis direction, the core extends in the X direction along one edge of the rectangular shape, and the pair of core parts respectively extend in the Y direction along a pair of opposing edges of the rectangular shape that are different from the one edge, the assembled magnetic member including the pair of magnetic poles, the pair of core parts around which the pair of coils are respectively wound, and the core at which the rotation angle position holding part is disposed, and winding axes of the pair of coils extend along the Y direction.

Provided is an axial-gap type motor in which positioning among components composing a yoke-provided core is easy so that manufacturing thereof can be performed accurately and easily, and which exhibits superiority in performance and cost. In the axial-gap type motor, either one of a stator and a rotor includes: a yoke-provided core including an annular back yoke and a plurality of magnetic pole cores projecting from a side surface of the back yoke; and coils. The yoke-provided core is a core-pieces-arrayed body obtained by arraying, in a circumferential direction thereof, core pieces obtained through division for the respective magnetic pole cores. Each core piece includes a magnetic pole core portion and a back yoke portion. Each core piece is a steel plate laminate obtained by stacking a plurality of steel plates in a radial direction.

A claimed invention relates to a field of electrical engineering, in particular to a design of linear electric motors utilized in electric submersible pump units in an oil industry. An essence of a claimed technical solution lies in the fact that construction elements of a stator are performed of a material with a relative temperature expansion equal to a temperature expansion of elements of a moving part of the linear electric motor. Stator sections are made in a form of a frame structure formed of C-shaped transverse ferromagnetic elements (space plates) with radial protrusions. These elements are connected by sectional and intersectional guide elements installed in an axial direction and configured to provide a constant value of a polar pitch and a precise positioning of stator elements relatively to each other.

Methods, systems, and devices are disclosed for wind power generation. In one aspect, a wind power generator includes a support base; inductors positioned over the support base in a circular array; an annulus ring track fixed to the base support and providing a circular track around which the inductors are located; an annulus ring rotor placed on the annulus ring track and engaged to rollers in the circular track so that the annulus ring rotor can rotate relative to the an annulus ring track, in which the annulus ring rotor include separate magnets to move through the circular array of inductors to cause generation of electric currents; and a wind rotor assembly coupled to the annulus ring rotor and including wind-deflecting blades that rotate with the rotor and a hollow central interior for containing a wind vortex formed from deflecting wind by the blades to convert into the electric energy.

A transverse flux electrical machine comprising a rotor portion and a stator portion is presented, the stator portion comprising a plurality of cores for use in conjunction with the rotor, each of the plurality of cores comprising a plurality of ferromagnetic sheet material layers substantially bent in a U configuration and stacked one on top of the other, a surface of each sheet material layer being substantially parallel with a core axis of the U configuration for reducing eddy currents therein and a pair of legs including, respectively, a reduction portion along the legs, toward a pair of poles thereof.

An axial flux machine includes a modulated stator, a rotor, and a plurality of spacers. The modulated stator includes plural stator units. Each stator unit includes a magnetic core and at least one winding. The magnetic core has first plate, a second plate, and a sidewall connecting the first plate to the second plate, and the winding is disposed on the magnetic core. The stator units construct the modulated stator. By modulating the stator, the slot fill factor and the cogging torque performance can be improved. The spacers are disposed to isolate the magnetic cores. The rotor is disposed in the modulated stator and includes plural first magnetic pieces and second magnetic pieces arranged alternately, and the magnetic flux lines of the first and second magnetic pieces respectively pass through sidewalls of the magnetic cores to construct C-type magnetic loops of opposite directions thereby improving power density.