Provide are a stator, a rotor, and a rotating electrical machine that reduce cogging or ripple due to a gap between core divided sections. The stator comprises a plurality of core divided sections each having a cutout part extending along an. axial direction, and a plurality of pins provided for each of the core divisions adjacent to each. other and press- fit into pin press-fit holes formed by the cutout parts facing each. other. The plurality of core divided. sections are divided from each other at division surfaces each consisting of four or more constituent surfaces extending along the axial direction, the constituent surfaces including the three surfaces of a first surface closest to a magnetic gap part, a second surface second closest to the magnetic gap part after the first surface, and a farthest surface farthest from. the magnetic gap part. A pin press-fit surface that is one of the constituent surfaces other than the first surface and the second surface and provided with the cutout part has a normal direction oriented in an out-of-plane direction of the first surface or an out-of-plane direction of the second surface.

A motor includes a housing including a housing base and a housing shaft portion that is provided on the housing base and extends in a direction along a rotation center axis, a motor stator that is disposed outward in a radial direction of the housing shaft portion, a motor rotor that is provided between the motor stator and the housing shaft portion, a bearing that is provided inward in a radial direction of the motor rotor and rotatably supports the motor rotor to the housing shaft portion, a sealing structure that is provided on an opposite side to the housing base in an axial direction of the motor rotor and seals between the motor rotor and the housing shaft portion, and a resolver that is configured to detect rotation of the motor rotor.

A stator for an electric motor has a stator main body with stator teeth arranged in the form of a star and a stator yoke. The stator main body is formed with a number of axial grooves on an outer circumference. Spring elements are inserted into the axial grooves and the spring elements circumferentially protrude in the radial direction from the stator main body. The spring elements are introduced with a radial form-fit.

Provided is a motor capable of having an improved output while keeping the mechanical strength of the stator core. A motor includes: a stator including a stator core including an annular yoke having an outer part and an inner part and teeth extending inwardly from the inner part of the yoke, and a coil wound around the teeth; and a rotor rotatably disposed inside of the stator. The stator core includes the lamination of sheet members made of a soft magnetic material. Each sheet member has a binding part to bind the sheet members in the lamination at a first part corresponding to the outer part of the yoke. At least the binding part of the first part is made of an amorphous soft magnetic material. The sheet member has a second part other than the first part, and the second part is made of a nanocrystal soft magnetic material.

The invention relates to an electrical machine having a rotor (1), a stator (2) radially surrounding the rotor, and a housing (4) radially surrounding the stator. In order to minimize stresses in the housing and nonetheless decrease the tendency of the stator to torsional vibrations, the stator is connected to the housing at least at one end in a radially and torsionally rigid but axially movable manner, for example, by way of an axially compliant material area. The electrical machine can, in particular, be a motor spindle in a gear finishing machine.

An electric motor apparatus is described that utilizes a Halbach array and a ferrofluid core. The electric motor comprises a rotor assembly and a stator assembly, each of which utilizes a Halbach array. A ferrofluid core is utilized in the stator, which results in a motor that is less susceptible to core loss and operates with increased efficiency.

Electric compressor 1 has electric motor 10 housed in casing 40, the motor including stator 2 having yoke portion 2a and plural tooth portions 2b, and rotor 3 disposed radially inside stator 2. Protrusion 41f protrudes at plural circumferential positions of inner periphery 41a1 of casing 40, which has protruding end surface 41f1 contacting an outer periphery of yoke portion 2a with width larger than tooth portion 2b. Contact tooth back portion 2a11 contacts protruding end surface 41f1, out of plural tooth back portions 2a1 each disposed behind tooth portion 2b as part of the outer periphery of yoke portion 2a, is formed in a region except both edge portions 41h of protruding end surface 41f1 in a circumferential direction within a circumferential angle range θ in which the protruding end surface 41f1 is located.

A high voltage electric machine and power distribution system including one or more of such electric machines are provided. In one aspect, a high voltage electric machine includes a stator, a rotor, and a housing encasing at least a portion of the stator and rotor. The stator is modularized into cascaded voltage stator modules. The stator modules are galvanically isolated from one another by intermodular separators. At least one intermodular separator is positioned between each adjacent pair of stator modules. The stator modules are also galvanically isolated from the housing by a housing separator. The housing separator is positioned between the stator modules and the housing. Each stator module has an associated set of windings that are wound only within their associated stator module.

A core includes a laminated body. The laminated body includes a plurality of electrical steel sheets stacked one on another. The laminated body includes a contact area between a pair of adjacent electrical steel sheets of the plurality of electrical steel sheets. The contact area includes a first friction area and a second friction area with friction coefficients different from each other.

A motor apparatus includes a casing, a stator disposed in the casing, a rotor disposed on an inner circumference of the stator, a shaft disposed on an inner circumference of the rotor, a functional part disposed on an outer circumference of a first member, and a heat-resistant part disposed between the functional part and a second member. The first member is the stator or the shaft. The second member is the casing or the rotor.