An outer rotor direct drive motor with a position encoder includes an outer rotor and a stator disposed in the outer rotor, wherein the stator includes: a stator chassis; a stator printed circuit board disposed on an side of the stator chassis, at least an excitation coil and a receiving coil being printed at the stator printed circuit board; and a stator winding disposed on the stator printed circuit board; wherein the outer rotor changes a coupling strength between the excitation coil and the receiving coil. The present invention has the following advantages: the installation method is flexible, and supports through-shaft installation without occupying too much space of the motor body; the sensor structure is stable, the rotor scale area and the induction coil are all printed on the printed circuit board, even in the case where the rotational speed is too fast, deformation or cracking will not be occurred.

An outer rotor direct drive motor with a position encoder includes an outer rotor and a stator disposed in the outer rotor, wherein the stator includes: a stator chassis; a stator printed circuit board disposed on an side of the stator chassis, at least an excitation coil and a receiving coil being printed at the stator printed circuit board; and a stator winding disposed on the stator printed circuit board; wherein the outer rotor changes a coupling strength between the excitation coil and the receiving coil. The present invention has the following advantages: the installation method is flexible, and supports through-shaft installation without occupying too much space of the motor body; the sensor structure is stable, the rotor scale area and the induction coil are all printed on the printed circuit board, even in the case where the rotational speed is too fast, deformation or cracking will not be occurred.

The present invention may provide a motor including a shaft, a rotor disposed outside the shaft, and a stator disposed outside the rotor, wherein the rotor includes a rotor core surrounding the shaft and a magnet disposed inside the rotor core, the rotor core includes a pocket in which the magnet is disposed, the rotor core is formed by stacking a plurality of plates, a lower end plate of the plurality of plates is disposed to cover at least a part of the pocket, and an upper end plate of the plurality of plates is disposed at a level higher than a level of the magnet.

In an example, a rotor for an electric motor includes an inner hub, an outer rim, and a plurality of slats. Each slat of the plurality of slats has a first end at the inner hub and a second end at the outer rim. The rotor is configured to drive a plurality of propeller blades that provide force for an aerial vehicle. Additionally or alternatively, a rotor for an electric motor includes a housing that includes a first retaining structure and a second retaining structure that are configured to apply a force that is directed radially outward against a magnet to hold the magnet against the housing. The rotor is configured to drive a plurality of propeller blades that provide force for an aerial vehicle.

A rotor hub assembly includes a rotor hub, a rotor and a cooling sleeve surrounding the rotor hub and located between the rotor hub and the rotor. Coolant flows between the rotor hub and the rotor during spinning of the rotor hub assembly. The cooling sleeve may include channels formed in the inner surface. The rotor hub may include an annular channel in fluid communication with the cooling sleeve channels. The annular channel may include apertures such that the cavities in the rotor hub are in fluid communication with the cooling sleeve. Coolant circulating within the rotor hub enters the annular channel and the channels in the cooling sleeve from centrifugal force caused by spinning of the rotor hub assembly.

A multi-degree-of-freedom electromagnetic machine includes a spherical structure, a first coil, a second coil, a non-magnetic structure, and a Halbach array. The spherical structure has a first axis of symmetry, a second axis of symmetry, and a third axis of symmetry, and the first, second, and third axes of symmetry are disposed perpendicular to each other. The first coil is wound on the spherical structure about the first axis of symmetry, and the second coil is wound on the spherical structure about the second axis of symmetry. The non-magnetic structure is spaced apart from, and at least partially surrounds, the spherical structure. The Halbach array is mounted on the non-magnetic structure and includes N-magnets, where N is a multiple of 4. The spherical structure and non-magnetic structure are mounted to allow relative rotation between the non-magnetic structure and the spherical structure.

The present application relates to a rotor, an assembly method and a replacement method for integrated magnetic pole modules of rotor, and a generator. The rotor includes: a rotor yoke having a mounting surface and an outer peripheral surface which are opposite to each other in a radial direction; multiple beads, which are distributed and spaced apart on the mounting surface along a circumferential direction of the rotor yoke, in which a radial distance between each bead and the mounting surface is adjustable; multiple integrated magnetic pole modules, each of which is detachably connected between two adjacent beads, and includes a carrier plate and multiple permanent magnets arranged on the carrier plate; and multiple fixing members, in which each of the beads is mounted to the mounting surface by the fixing members, and each of the fixing members has an operation portion that can protrude from the outer peripheral surface.

A motor includes a stator and a rotor rotatably disposed at an inner side of the stator or an outer side of the stator. The rotor includes a rotor core block including a plurality of rotor core segments that are arranged along a circumferential direction of the rotor, where each of the rotor core segments includes a plurality of electrical steel sheets that are stacked on one another. The rotor further includes a plurality of permanent magnets disposed between the plurality of rotor core segments, where the plurality of rotor core segments and the plurality of permanent magnets are alternately arranged along the circumferential direction of the rotor. The plurality of electrical steel sheets include bridges that connect the plurality of rotor core segments to one another along the circumferential direction of the rotor.

The present invention relates to a rotor of motor, and more particularly, to a 2-segment quasi-Halbach rotor of motor that includes a radial magnet and a circumferential magnet which are Halbach-arrayed and a back iron providing a flux to reduce a thickness of the magnet and acquire high air-gap flux density.

A manufacturing method of a core of a rotating electrical machine includes: a preparation step of preparing a press device; a fixing step of fixing a steel sheet to a shaft member held by the press device by passing the shaft member through a hole provided in the steel sheet and extending in a stacking direction; and a processing step of performing press-working on the steel sheet by the press device in a state where the steel sheet is fixed to the shaft member.