A hub of this motor includes a hub annular portion being annular and arranged above a stator, and a flange portion arranged to extend radially outward from the hub annular portion, and including an upper surface on which an annular member is arranged. A yoke includes a first yoke cylindrical portion to which a magnet is fixed; a yoke annular portion arranged to extend radially inward from an upper end of the first yoke cylindrical portion, and including an upper surface arranged opposite to a lower surface of the hub; and a second yoke cylindrical portion arranged to extend axially upward from a radially inner end portion of the yoke annular portion. An inner circumferential surface of the hub annular portion and an outer circumferential surface of the second yoke cylindrical portion are fixed to each other at an engagement portion arranged radially inward of a radially inner end portion of each of coils.

A rotor hub comprises an inside cylindrical portion extending in an axial direction on an inner surface side of a rotor yoke and an outside cylindrical portion extending in the axial direction on an outer surface side of the rotor yoke, a motor gear wheel is integrally moulded on a portion of said outside cylindrical portion, and a rotor unit is assembled with a stator unit in such a way that a fixed shaft is inserted into a cylindrical hole in the rotor hub and a rotor magnet and pole teeth are facing.

An electromechanical flywheel machine includes a flywheel mass and a motor-generator having a rotor rotatable about a stationary inner stator having stator windings.

This rotary drive apparatus includes a stationary portion including a stator; and a rotating portion supported through a bearing portion to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion, the rotating portion including a magnet arranged opposite to the stator. The bearing portion includes an upper bearing portion, and a lower bearing portion arranged below the upper bearing portion. A center of gravity of the rotating portion is located below an upper end of the upper bearing portion and above a lower end of the lower bearing portion.

An outer-rotor motor includes a support base, a stator attached around the support base, and a rotor rotatably mounted to the stator. The support base includes a substrate and a bearing holder separately formed and assembled together. A through hole is formed in a central area of the substrate. The bearing holder includes a first end engaged with the through hole and a second end protruding in a direction away from the substrate.

The presently disclosed invention provides an outer rotor brushless direct current motor that includes a tire integrated as part of the outer rotor, and is thus configured as a direct drive wheel, such as may be used on a mobile robot. The drive wheel includes a cylindrical outer rotor having a plurality of poles positioned on an inner surface, a stationary stator spaced inwardly from the rotor and defining a magnetic clearance gap between the plurality of poles of the rotor and a plurality of electromagnets positioned on an outer circumference of the stator, and a stationary central shaft. The stator is mounted to the central shaft and the rotor is configured for rotation about the stator.

A blower includes a housing, and an impeller and a motor received in the housing. The motor drives the impeller to rotate. The motor includes a stator and a rotor. The stator includes a stator core and windings wound around the stator core. The stator core includes a yoke and teeth extending from the yoke. A distal end of each of the teeth forms a tooth tip, with a slot opening formed between each two adjacent tooth tips. The rotor includes a permanent magnet forming a plurality of magnetic poles. The stator and the rotor define an air gap therebetween. A circumferential width of the slot opening is equal to or less than two times of a radial width of the air gap.

The invention relates to an electric motor (24) designed for driving a vehicle (10) which can be moved by a person, particularly a pram (11), walker or the like, having a rotor (52), which comprises at least one holder (80) for a wheel (14, 16), and a stator (54) which can be connected through a housing (38) to a load-bearing structure (12) of the vehicle (10). According to the invention, the housing (38) has a status display (84) on which parameters, particularly power parameters, of the electric motor (24) can be displayed so as to be visible from the outside.

A stator includes a first sleeve extending in an axial direction and a first stator core on an outer periphery of the first sleeve. The first stator core includes a lower core and an upper core on a side of the lower core opposed to a first end of the axial direction. The lower core includes a lower annular portion with an annular shape and lower pole teeth protruding radially outward from a radially outer end surface of the lower annular portion and extending to a second end of the axial direction. The upper core includes an upper annular portion with an annular shape arranged on the lower annular portion opposed to the first end of the axial direction to overlap the lower annular portion, and upper pole teeth protruding radially outward from a radially outer end surface of the upper annular portion and extending to the second end of the axial direction. Each of the lower pole teeth and each of the upper pole teeth are alternately arranged in the circumferential direction.

A motor includes a stationary portion including an annular stator centered on a central axis extending in a vertical direction, and a rotating portion including a magnet radially opposite to the stator, and rotatable about the central axis. The stationary portion includes a circuit board axially below the magnet and an electronic component mounted on the circuit board, the circuit board includes a board hole passing therethrough in an axial direction. The electronic component includes a component body portion including at least a portion thereof in the board hole, a first terminal portion extending in a first direction from the component body portion, the first direction being not parallel to the axial direction, a second terminal portion extending downward from the first terminal portion, and a third terminal portion extending from the second terminal portion, and joined to the circuit board through solder.