A stator device for a motor including a shaft includes two spaced-apart base seats, a stator and a gel body. Each of the base seats includes a base member and a bearing receiving groove open away from the other one of the base seats along the axis. The base member is formed with an axial hole extending along an axis of the shaft through the base member and permitting the shaft to extend therethrough. The stator is disposed around the shaft and between the base members, and includes a core and a coil disposed around the core. The gel body is attached to and disposed around at least a portion of the stator, and is attached to one of the base seats so as to position the stator relative to the one of the base seats.

In a rotating electric machine, an axis direction width of a rotor core arranged at an end of a load side of the rotating shaft is set to be γ, an axis direction width of a rotor core arranged at an opposite side end of the load side is set to be ε, a distance from a support part at the load side to the rotor core at the load side is set to be α, and a distance from a support part at the opposite side of the load side to a rotor core at the opposite side of the load side is set to be β. In a case of α>β, γ≥ε is satisfied, and in a case of α<β, γ≤ε is satisfied. Thereby, the vibration of the rotor can be suppressed effectively.

A torque delivering apparatus, including: polygonal cross-section stator body having a plurality of exterior side faces of even number extending between opposite axial end faces, the stator including cylindrical bore extending between the opposite axial ends and centred on central axis of the stator body; a rotor assembly having cylindrical cross-section sized for rotation within the cylindrical bore about the central axis with at least one permanent magnet and shaft coupled to the magnet for rotation; and a plurality of solenoid coils, each coil having plurality of windings and routed to have sections extending parallel along opposite ones of the plurality of exterior side faces; wherein each of the plurality of coils is configured to selectively receive current and generate magnetic field in the stator that is applied to the rotor magnet, the rotor being subject to magnetic torque within the cylindrical bore for rotating and aligning the magnetic field of the permanent magnet with the generated magnetic field.

An electric motor includes a housing with a tubular wall extending in an axial direction of the housing and a closures positioned at opposite axial ends of the tubular wall, a stator fixedly mounted inside of the housing, a rotor rotatably mounted inside of the housing, and a bearing rotatably supporting the rotor. At least one of the closures includes a rotor supporting portion. The rotor supporting portion includes a through hole configured to receive a portion of the rotor. The through hole is defined by a closed shape including at least three or more straight sides, and a radius of an inscribed circle of the closed shape of the through hole is larger than a radius of the portion of the rotor received in the through hole.

The present specification discloses a motor assembly. An embodiment of the motor assembly disclosed in the present specification may comprise: a motor housing in which a motor is received; a shaft which forms the rotation axis of the motor; a rotor which is coupled to the shaft; a plurality of cores and coils which are provided along the circumference of the rotor to form a flux path; and insulators which are coupled to the cores to insulate the cores from the coils, wherein each of the insulators may comprise an insulating portion which covers the outer surface of the corresponding core and a fixing portion which protrudes outward from the insulating portion in the radial direction of the rotor, and the fixing portion may be coupled to the inner circumferential surface of the motor housing.

A rotary electric machine includes: a housing; a stator that is disposed in the housing; a rotating shaft that is rotatably disposed in the housing; a rotor that is disposed on the rotating shaft; and a rotational angle detecting apparatus that generates a signal that corresponds to a rotational angle of the rotating shaft. The rotational angle detecting apparatus includes: a magnetism generating body that is disposed on an axial end surface of the rotating shaft; and a magnetic sensor that faces the magnetism generating body. A recess portion is disposed on the end surface. The magnetism generating body is disposed in the recess portion.

A rotating electrical machine includes an outer housing; a drive shaft rotatably mounted within the outer housing; a bearing supporting the drive shaft relative to the outer housing, wherein the outer housing includes a support surface confronting the bearing and the bearing includes a bearing surface confronting the support surface, and further wherein a region defined between the support surface and the bearing surface has a lubrication layer; and a lubrication flow path configured to direct a lubricant to the bearing, wherein the lubrication flow path is in fluid communication with the region between the support surface and the bearing surface so as to replenish the lubrication layer. A method of lubricating a bearing for a rotating electrical machine is also disclosed. The rotating electrical machine may be a generator for a wind turbine.

A brushless direct-current motor is provided includes an inner stator and an outer rotor. A rotor shaft extends through a stator core of the inner stator. A first end cap includes a radial back plate disposed on a first side of the stator and a front center opening through which the rotor shaft is supported via a front bearing. A second end cap includes an inner annular body extending axially inwardly and forming a rear center opening, an outer annular body, and a main body extending on a second side of the stator. The inner annular body includes a first portion that extends at least partially into an opening of the stator core and supports the rotor shaft via a rear bearing, and a second portion rearward of the first portion that received a rear end of the rotor shaft therein and houses a sensor board therein.

A brushless motor includes a stator assembly including a generally-cylindrical stator body having a center bore, teeth extending from the stator body towards the center bore and defining slots in between, and windings wound around the teeth; and a rotor assembly rotatably received within the center bore and includes a rotor shaft and a generally-cylindrical rotor body. The motor further includes at least one rotor bearing mounted on the rotor shaft, and at least one bearing support member supporting the rotor bearing. The bearing support member includes a radial body forming a bearing pocket for receiving the rotor bearing therein, and axial post inserts received within the slots of the stator assembly between adjacent sets of windings and engaging an inner surface of the stator body to support the rotor bearing with respect to the stator assembly along a center axis of the center bore of the stator assembly.

A high performance rotating electrical machine which aims at downsizing, and challenges inevitable technical problems such as deterioration of efficiency η caused by copper loss and temperature rise inside the rotating electrical machine due to heat generation induced by eddy current generated in magnetic body.