An electromagnetic propulsion system is provided. The system comprises first and second pluralities of stator coils wound about first and second axes, a plurality of support structures, first and second couplers that surround portions of the first and second pluralities of stator coils, and first and second pluralities of sets of rotor coils wound about axes that are parallel to the first and second axes. The stator coils are configured to receive electric current through an outside controller selecting appropriately coupled stator sections or through a sliding electrical contact system or bearing system to induce at least a first magnetic field. The plurality of support structures supports the first and second plurality of stator coils. The first and second couplers include notches and are oriented so that their notches pass over the plurality of support structures when the couplers move along the stator coils. The couplers may have an adjustable segment to close the notch. The sets of rotor coils are equidistantly attached to the couplers and are configured to receive electric current to induce magnetic fields that interact with the magnetic fields of the stator coils so that magnetic forces are applied to the plurality of rotor coils, thereby propelling the couplers along the stator coils.

A motor includes a stator unit and a rotor rotatable relative to the stator unit. The stator unit includes a stator, a resin portion, a support portion, and an annular recess. The stator includes a stator core, an insulator, and a conducting wire wound around the stator core with the insulator interposed therebetween. The resin portion covers at least part of the stator. The support portion supports the stator. At an end portion of the stator unit on one side in an axial direction, the recess is recessed toward another side in the axial direction. The resin portion is positioned further in a radially outer direction than the recess. The rotor includes an annular projection extending toward the other side in the axial direction. At least part of the projection is accommodated in the recess.

A fan that is able to display an advertisement or other visible message includes a stator assembly, a rotating assembly, and a decoration member. The stator assembly includes a base, a fixing shaft, and a stator. The fixing shaft is positioned at the base. The stator is annular and positioned outside the fixing shaft. The rotating assembly is sleeved on the fixing shaft. The decoration member is fixedly connected to one end of the fixing shaft away from the base. The stator drives the rotating assembly to rotate around the fixing shaft while the stationary decoration member carries the display.

A lubricant supported electric motor includes an outer stator and an inner stator each extending around an axis in radially spaced relationship with one another. A rotor is rotatably disposed between the inner and outer stators to define an inner gap extending radially between the rotor and the inner stator and an outer gap extending radially between the rotor and the outer stator. A lubricant is disposed in both of the inner and outer gaps for supporting the rotor radially between the inner and outer stators. The lubricant supported motor with a two-sided radial flux configuration results in improved rotor-to-stator system stiffness to allow the lubricant supported electric motor to be used in high shock and high vibration environments, while also providing high torque in a small and lightweight design package.

The present invention may provide a motor including a housing coupled to a first bearing, a stator disposed in the housing, a rotor disposed in the stator, and a shaft coupled to the rotor, wherein the housing includes a body and a first pocket formed to be bent from one side of the body toward an inner side of the housing, the first pocket includes an extended part bent from the one side of the body and a first support part bent from the extended part, the first pocket includes a first opening formed by one side of the extended part adjacent to the one side of the body and a second opening formed by the first support part, and a size of the first opening is greater than a size of the second opening.

A motor includes a shaft centered on a center axis oriented in a vertical direction, a bearing rotatably supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, and a covered cylindrical rotor connected to the shaft. The rotor includes a disk-shaped rotor lid portion connected to the shaft, and a rotor side wall portion extending downward from an outer edge of the rotor lid portion. The shaft is made of metal. The rotor lid portion and the rotor side wall portion are made of resin. The rotor lid portion and the shaft are an integrally molded article.

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.

A brushless motor capable of accurately detecting magnetism and securing rigidity of a center piece is provided. A brushless motor (10) includes; a stator (12); a rotor (14) having a rotor magnet (22) arranged radially outward of the stator (12); a metal center piece (18) that has a plate-like portion (38) disposed opposing the stator (12) at one side in an axial direction of the stator (12), and holds the stator (12); a control board (42) disposed at an opposite side from the stator (12) with respect to the plate-like portion (38), and provided with a magnetic detection sensor (46); a magnetic induction member (68) extending from a side of the rotor magnet (22) to a side of the magnetic detection sensor (46); and a resin-made connector member (44) that holds a connector terminal (62) connected to the control board (42), holds the magnetic induction member (68), and is fixed to the center piece (18).

In a rotating electrical machine, an armature includes a filmy sheet member secured to one of an inner peripheral surface and an outer peripheral surface of a base member to cover one of the inner peripheral surface and the outer peripheral surface of the base member. A sheet member is made of thermoplastic resin as non-magnetic material, and has a field-member side peripheral surface. Each conductive member has at least part embedded in the sheet member in a radial direction of the rotating electrical machine to thereby arrange a base-member side peripheral surface to be radially closer to the base member than the field-generator side peripheral surface of the sheet member is.

In a rotating electrical machine, an armature includes a filmy sheet member secured to one of an inner peripheral surface and an outer peripheral surface of a base member to cover one of the inner peripheral surface and the outer peripheral surface of the base member. A sheet member is made of thermoplastic resin as non-magnetic material, and has a field-member side peripheral surface. Each conductive member has at least part embedded in the sheet member in a radial direction of the rotating electrical machine to thereby arrange a base-member side peripheral surface to be radially closer to the base member than the field-generator side peripheral surface of the sheet member is.