Abstract: An electrical propulsor motor includes a stator having a hollow cylinder with an inner cylindrical surface and an outer cylindrical surface, rotor incorporated in a hub of a propulsor and mounted to the stator, including a first cylindrical surface facing the inner cylindrical surface, where the inner cylindrical surface and first cylindrical surface form a first air gap, a second cylindrical surface facing the outer cylindrical surface, wherein the outer cylindrical surface and the second cylindrical surface form a second air gap, and a plurality of axial impeller vanes mounted to at least one of the first cylindrical surface and the second cylindrical surface and within at least one of the first air gap and the second air gap and positioned to force air through the at least one of the first air gap and the second air gap when the rotor rotates about the axis of rotation.

Abstract: This disclosure relates to an axial magnetic bearing for a centrifugal refrigerant compressor, and a corresponding system and method. A centrifugal refrigerant compressor system according to an exemplary aspect of the present disclosure includes, among other things, an impeller connected to a shaft, and a magnetic bearing system supporting the shaft. The magnetic bearing system includes an axial magnetic bearing, which itself includes a first permanent magnet configured to generate a first bias flux, a second permanent magnet axially spaced-apart from the first permanent magnet and configured to generate a second bias flux, and an electromagnet. The electromagnet includes a coil arranged radially outward of the first and second permanent magnets, and the electromagnet is configured to selectively generate either a first control flux or a second control flux to apply a force to the shaft in a first axial direction or second axial direction opposite the first axial direction, respectively.

Abstract: The disclosed device is for storing energy by means of a flywheel. The device comprises a solid rotor having embedded permanent magnets along its outer surface, with flywheels attached at each end. The rotor is suspended by magnetic bearings within a housing. The housing comprises electromagnets that are sequentially charged in order to cause the rotor to spin due to the interaction of the electromagnets with the facing permanent magnets on the rotor. The spinning of the rotor causes the flywheels to spin, which results in the storage of rotational energy. The flywheels, which include magnets, turn through sets of coils on either end of the housing, thereby operating as an electrical generator to convert the flywheel rotational energy into electrical energy output from the device.

Abstract: Provided is a method for manufacturing a cooling device and a motor housing cooling device manufactured using same, the method including the steps of: making a cooling pipe and forming the cooling pipe to a shape capable of being buried in a housing body; filling the cooling pipe with a support material; making a portion divided from the housing body as a jig body so as to support the cooling pipe against the jib body in an injection mold of the housing body; locating the cooling pipe in the injection mold of the housing body in such a manner as to be supported against the jig body and injection-molding the housing body; and after the injection molding, removing the support material from the cooling pipe.

Abstract: A canned motor device includes a motor unit that includes an inner rotor having a plurality of engaging grooves and a plurality of protrusions, and an impeller having a plurality of engaging hooks and a plurality of inner grooves. Each of the protrusions has at least one lateral protrusion surface. Each of the inner grooves is defined by a main groove surface, two lateral groove surfaces and a groove end surface. When the engaging hooks respectively engage the engaging groove, the protrusions respectively engage the inner grooves in a manner that the at least one lateral protrusion surface of each of the protrusions urges one of the lateral groove surfaces of the respective one of the inner grooves.

Abstract: A method of mounting a rotor assembly to a frame of an electric motor includes providing a rotor assembly having a bearing and a frame having a bearing seat. The method includes locating the bearing within the bearing seat, applying a first adhesive at a substantially hidden interface between the bearing and the bearing seat, applying a second adhesive at a substantially visible interface between the bearing and the bearing seat, and curing the first and second adhesives using different curing processes.

Abstract: A brushless DC motor (BLDC) includes a stator having a ring-shaped body with multiple stator posts extending axially outward from the ring-shaped body. A plurality of stator windings are each wound about a corresponding one of the stator posts. A rotor support structure is positioned radially inward of the multiple stator posts. A rotor including a shaft is received in the rotor support structure. A first rotor disk is fixed to a first end of the shaft. At least a first set of magnets is disposed about the rotor disk and positioned radially adjacent to the stator posts such that the first set of magnets and the stator windings define a first radial flux flowpath. A second set of magnets positioned relative to the stator posts in one of an axial adjacency or a radial adjacency such that a second flux flowpath is defined.

Abstract: The invention specifies a rotor (1, 1a . . . 1f) for an electrical machine (14), which rotor comprises a rotor shaft (2, 2a . . . 2f), a rotor laminated core (3), which sits on the rotor shaft (2, 2a . . . 2f) with a press fit, a first rotor holder (5a . . . 5c), which is arranged adjacent to the rotor laminated core (3) on a first side thereof, and a second rotor holder (6a . . . 6d), which is arranged adjacent to the rotor laminated core (3) on a second, opposite side thereof. Furthermore, the rotor comprises a first shaft securing ring (7), which sits in a first groove of the rotor shaft (2, 2a . . . 2f) and axially secures the rotor laminated core (3). In addition, the invention specifies an electrical machine comprising a stator (15) and a rotor (1, 1a . . . 1f) of said type, and a vehicle (16) with at least two axles, at least one of which is driven. The driving of the vehicle (16) is performed at least partially or temporarily by the electrical machine (14) of the abovementioned type.

Abstract: An electric motor includes a rotor having a rotor shaft part and a first shaft part and a second shaft part. The rotor shaft is situated axially between the first and the second shaft parts. The first shaft part includes a first bearing seat and is connected to the rotor shaft part in a torsionally fixed manner, and the second shaft part includes a second bearing seat and is connected to the rotor shaft part in a torsionally fixed manner.

Abstract: One embodiment relates to a motor comprising: a housing; a stator disposed in the housing; a rotor disposed in the stator; a shaft coupled to the rotor; a cover disposed on the housing; and an upper bearing disposed on the cover. The cover comprises: a first body having the upper bearing disposed thereon; a second body disposed on the lower side of the first body; a third body disposed on the lower side of the second body; and a protrusion part protruding in the radial direction from the outer peripheral surface of the second body, wherein the third body comprises an inclined surface inclining inwardly with respect to the outer peripheral surface of the second body.

Abstract: Various aspects include electric generators configured to boost electrical output by leveraging electron avalanche generated by a high energy photon radiation source. In various aspects, an electric generator includes a stator and a rotor positioned within the stator, wherein the stator and rotor are configured to generate electric current when the rotor is rotated, and a high energy photon source (e.g., a gamma ray source) positioned and configured to irradiate at least a portion of conductors in the rotor or stator. In some aspects, the stator generates a magnetic field when the electric generator is operating, and the rotor includes armature windings configured to generate electric current when the rotor is rotated. In some aspects, the high energy photon source includes cobalt-60 and/or cesium-137.

Abstract: An electric work machine, such as a lawn mower includes a motor case (22) fixed inside a main-body housing (10). A brushless motor (21) is housed inside the motor case (22) and includes a stator (23) having a stator core (40), coils (45), and upper and lower insulators (42, 43), and a rotor (24) disposed inward of the stator (23) and having a rotary shaft (25). A spindle (17) is driven by the rotary shaft (25). The motor case (22) holds the stator (23) and axially supports the rotary shaft (25) via bearings (68, 76). One or more insulating members, such as an insulating cap (67) and/or a resin layer (78), provide electrical insulation between the stator core (40) and the rotary shaft (25).

Abstract: The present invention may provide a motor including a housing, a cover which covers the housing, a stator disposed inside the housing, a rotor disposed inside the stator, a rotary shaft coupled to the rotor, a bearing disposed on the cover, and a nut which is coupled to the cover and which is in contact with an outer ring of the bearing, wherein the cover incudes a first pocket accommodating the bearing and a second pocket which is disposed above the first pocket and to which the nut is rotation-coupled, the nut includes a body disposed to be lower than an upper surface of the cover and including a screw thread and an extension portion disposed to be higher than the upper surface of the cover, the body incudes a protrusion protruding outward from the screw thread, and the second pocket includes a first groove in which the protrusion is positioned.

Abstract: A motor assembly includes a first bearing installed on a rotating shaft adjacent to an impeller to support a first support part of the rotating shaft, a second bearing installed on the rotating shaft adjacent to the rotor to support a second support part of the rotating shaft, a bearing bracket receiving the first and second bearings therein, an elastic member inserted between the first bearing and the bearing bracket or between the second bearing and the bearing bracket to press either the first bearing or the second bearing to get closer to each other, and a separation preventing member installed on the bearing bracket to fix the first bearing, the second bearing and the elastic member to an inner space of the bearing bracket such that at least one portion of the separation preventing member overlaps with one of the first bearing, the second bearing and the elastic member.

Abstract: The present disclosure provides a brushed direct-current slip ring motor comprising: a commutator-armature system secured to a stationary shaft of a motor base, the commutator-armature system comprising: commutator segments connected via wires, teeth in a circular orientation forming slots, and commutator leads connected to the commutator segments and secured to the wires; a top slip ring above the commutator segments; a bottom slip ring below the commutator segments, a rotor configured to axially rotate responsive to an electromagnetic field produced from the commutator-armature system comprising: a plurality of magnets configured to axially rotate with the rotational shaft; a first brush system in contact with one or more of the commutator segments, the first brush system being configured to axially rotate with the rotor; and a second brush system in contact with one or more of the commutator segments, the second brush system being configured to axially rotate with the rotor.

Abstract: A system and method that converts rotational movement of a crank shaft into electrical energy is provided. The crank shaft is caused to rotate using a series of electromagnets powered by a power source. The electromagnets are arranged to encircle and magnetically affect a central magnet coupled to the shaft. The system effectively amplifies the energy supplied from the power source and saves the resulting excess energy to an energy storage device.

Abstract: A motor drive assembly having an electric motor with a rotor that includes a rotor shaft and a heat exchanger received in the rotor shaft. The heat exchanger has an insert body with an outer insert surface that is engaged to an inside surface of the rotor shaft. The insert body includes a plurality of segments. Each of the segments defines a first through-hole, and a plurality of second through-holes. Each of the segments is fixedly coupled to one another. A first flow passage extends through the first through-holes in the plurality of segments. Each of the second through-holes defines a portion of a corresponding second flow passage. The second flow passages are disposed concentrically about the first flow passage.

Abstract: An embodiment of the present invention relates to a cover assembly and a motor comprising same, the cover assembly comprising: a cover plate; a ground terminal disposed on the cover plate; and a capacitor connected to the ground terminal by means of a wire. The ground terminal comprises: a body unit; a ground unit bent from one area of the upper end of the body unit to a first direction; clip units extending from both sides of the body unit to a second direction which is opposite from the first direction; and a coupling unit extending from the lower part of the body unit. The wire is coupled to the clip units by means of insertion. Accordingly, the present invention enables the wire of the capacitor to be fixed in a temporarily assembled state and thus enables an automation process during assembly of the motor.

Abstract: A circuit board comprising a first power terminal, a second power terminal spaced apart from the first power terminal, a first ground terminal, a second ground terminal spaced apart from the first ground terminal, a first magnetic element part disposed along a first circular arc having a first radius, and a second magnetic element part disposed along a second circular arc having a second radius greater than the first radius, wherein an angle of at least one portion of the first circular arc is not overlapped with an angle of the second circular arc.

Abstract: The present disclosure discloses an electric assembly and a vehicle having the same. The electric assembly includes: a box assembly, where an mounting plate is disposed in the box assembly, the mounting plate divides a space within the box assembly into a motor holding cavity and a transmission holding cavity that are arranged along an axial direction of a motor shaft, and the mounting plate has a shaft via-hole making the motor holding cavity and the transmission holding cavity be in communication with each other; a motor, disposed in the motor holding cavity; and a transmission, disposed in the transmission holding cavity, where the motor is power-coupled to the transmission.