An embodiment can provide a motor comprising: a shaft; a rotor coupled to the shaft; a stator disposed between the shaft and the rotor; a bearing disposed between the shaft and the stator; and a base plate, wherein: the rotor includes a yoke coupled to the shaft; the base plate includes a body, a first partition protruding from the body, and a second partition extending from the first partition; the first partition is disposed between the bearing and the stator; a portion of the second partition is disposed to be overlapped with the first partition; and the first partition is in contact with the lateral surface of an outer ring of the bearing and the second partition is in contact with the one surface of the outer ring of the bearing.

A motor comprising a casing, rotating shaft, magnetic ring, three-phase hollow cup coil winding and insulation end cover, is provided. The casing includes a sleeve and inner core arranged coaxially with the sleeve and air guide plates connected to the sleeve and inner core, the sleeve, inner core and two adjacent air guide plates are surrounded to form an air guide channel, the inner core is provided with a mounting hole, the bearing is installed in the mounting hole, and a rotating shaft passes through the bearing, a magnetic ring is sleeved outside one end of the rotating shaft, the three-phase hollow cup coil winding is sleeved outside the magnetic ring. A rotating gap is set between the three-phase hollow cup coil winding and the magnetic ring, and insulating end cover is installed on the outlet of the sleeve. A wind end fixes the three-phase hollow cup coil winding in the sleeve, and the inner core is provided with heat dissipation holes that are all connected with installation holes.

The present invention relates to an in-wheel motor driving apparatus for reducing weight, improving Hall sensor assembly performance, and reducing a defect rate. According to one embodiment of the present invention, the weight of an in-wheel motor can be reduced by separating a suspension housing and a shaft and applying different materials thereto. Furthermore, the ease of assembling a Hall sensor can be improved, and the defect rate can be reduced.

A brushless motor is at least partially located in a hermetically sealed space. An electric work machine includes a brushless motor, an output unit, a motor case, a lead wire, and a first seal. The brushless motor includes a stator, a rotor rotatable with respect to the stator, and a rotor shaft fixed to the rotor. The output unit is drivable by the rotor shaft. The motor case includes an internal space and a wiring passage. The internal space accommodates the stator and the rotor. The lead wire is located in the wiring passage connecting the internal space and an external space of the motor case. The first seal seals between the lead wire and the motor case.

Provided are: a rotor having a shaft rotatable about a rotation axis; a stator that surrounds the rotor from a radially outer side; a housing that accommodates the rotor and the stator; a bearing that is arranged in the housing and rotatably supports the shaft; an extension shaft arranged at an end portion on one axial side of the shaft to contact the shaft; and a neutralizing member that is arranged in the housing and contacts the extension shaft. The extension shaft has a fixed portion radially overlapping the shaft. The fixed portion has a protrusion radially protruding toward the shaft.

According to an aspect of the present disclosure, a rotor assembly includes a rotor core having a through-hole disposed at a central portion thereof along an axial direction of the rotor core, and a rotor shaft that passes through the through-hole and coupled to the rotor core, the rotor shaft includes a shaft body having a hollow portion in an interior thereof, a cooling fluid hole part including a plurality of cooling holes passing through the shaft body to discharge a cooling fluid introduced through the hollow portion to an outside of the shaft body and arranged to be spaced apart from each other along an axial direction of the shaft body, and a support flange protruding radially on an outer surface of the shaft body to restrain axial movement of the rotor core and having a passage communication hole.

A waterproof fan includes: a rotor including a rotating blade capable of rotating about a rotation axis; a stator including a plurality of stator cores extending in a radial direction relative to the rotation axis, and a winding wound around each of the stator cores; a frame including a housing space opening toward one side of the rotation axis; a circuit board electrically connected to the winding and housed in the housing space; a waterproofing resin portion covering the stator and the circuit board to block the opening of the housing space; and a positioning member provided in the housing space and configured to position the circuit board at a position away from an inner wall of the housing space.

The motor is provided with: a rotor core; permanent magnets disposed on the outer circumferential surface of the rotor core and magnetized in parallel orientation; and a salient pole saliently formed between the permanent magnets. The ratio of the number of magnetic poles of the permanent magnets to the number of teeth is 2:3. Sloped surfaces are formed on the side surfaces of the permanent magnets in the circumferential direction. The angle θ2 between lines L3 and lines L2 is an electrical angle of 13° or more, said lines L3 connecting outer circumferential corner portions where the sloped surfaces and the outer circumferential surface are connected to each other and the shaft center, said lines L2 connecting the radial direction outermost side of the circumferential side surface of the salient pole and the shaft center.

Disclosed herein is an axial flux motor. The axial flux motor includes a rotating shaft, a rotor assembly, and a stator assembly. The rotor assembly includes a rotor disc, a plurality of rotor disc teeth provided on a first side of the rotor disc, and a cage. The stator assembly includes a stator base, a plurality of electromagnet assemblies, a supporting plate, and a bearing housing. An electromagnet assembly from the plurality of electromagnet assemblies comprising a core, a first fixture, a second fixture, a coil winding, and a couple of connecting screws. The yoke is configured to be secured between the first fixture and the second fixture.

A spindle motor is provided, the motor comprising: a base plate, a PCB on the base plate, a bearing assembly arranged on the base plate, a stator coupled to a periphery of the bearing assembly, a rotor rotationally coupled to the bearing assembly, the rotor including a yoke and a magnet, and a rotation shaft rotationally coupled to the bearing assembly. The base plate includes a planar portion and a protruding portion arranged along with a periphery of the yoke, the protruding portion being apart from the yoke. The base plate is partially covered with the PCB in a region where the stator is arranged. And, a height from the planar portion to an upper surface of the protruding portion is smaller than a height from the planar portion to a lower surface of the periphery of the yoke.