A stator device for a motor including a shaft includes two spaced-apart base seats, a stator and a gel body. Each of the base seats includes a base member and a bearing receiving groove open away from the other one of the base seats along the axis. The base member is formed with an axial hole extending along an axis of the shaft through the base member and permitting the shaft to extend therethrough. The stator is disposed around the shaft and between the base members, and includes a core and a coil disposed around the core. The gel body is attached to and disposed around at least a portion of the stator, and is attached to one of the base seats so as to position the stator relative to the one of the base seats.

Apparatuses and methods relating to hub motors having enhanced thermal characteristics may include a hub motor having a stator comprising steel and a central axle (e.g., a mandrel and shaft) comprising a material with a substantially higher thermal conductivity than the stator (e.g., aluminum). Heat may be transferred from the stator through the axle of the motor to an outside heat sink. Manufacturing of thermally enhanced hub motors may include extrusion and/or cryogenic fitting methods relating to the central mandrel and shaft.

A power tool including an electric motor is provided. The tool includes a substantially disc-shaped printed circuit board (PCB), power switches mounted on the PCB; magnetic sensors mounted on the PCB facing the motor; a heat sink in thermal communication with the power switches disposed between the PCB and the electric motor; and a molded casing structurally securing the heat sink relative to the PCB. The molded casing includes a center opening, at least one first opening provided at a first radial distance from the center opening arranged to receive the magnetic sensors therein, and at least one second opening provided at a second radial distance from the center opening arranged to securely receive the heat sink therein.

A motor includes: a stator; a rotor axially aligned with the stator; a circuit board; and a heat dissipating plate. The stator includes: an iron core including teeth; an insulator covering one end surface, in the axial direction, of the iron core; and a coil wound around the teeth. The insulator includes an electrically insulating material having a lower rate of heat transfer than a material included in the iron core. The heat dissipating plate is attached to the insulator in a state in which the heat dissipating plate is in contact with the insulator without being in contact with the iron core, and the circuit board is attached to the heat dissipating plate in a state in which the circuit board is in contact with the heat dissipating plate without being in contact with the iron core.

An integrated electric power steering apparatus in which a control unit 1 or 101 for controlling a motor 2 is disposed inside a housing, the control unit 1 or 101 is disposed so as to be coaxial to an output shaft 21 of the motor 2, and in which the control unit 1 or 101 and the motor 2 are integrated, wherein: the control unit 1 or 101 includes a circuit board 4 and an intermediate member 36; main parts are mounted to the circuit board 4; wiring is disposed on the intermediate member 36; the circuit board 4 and the intermediate member 36 are stacked; the parts are mounted to first and second surfaces of the circuit board 4; and a portion of the housing and first surfaces of the parts are placed in direct contact or are placed in contact so as to have a heat-transferring member interposed.

The present invention relates to a stator and a fan motor comprising same, the stator comprising: a stator core including a back yoke and a plurality of teeth that extend to protrude in the radius direction from the inner surface of the back yoke toward the center of the back yoke; a plurality of stator coils respectively wound around the plurality of teeth; and a plurality of teeth insulators for insulating the plurality of teeth from the plurality of stator coils, wherein each of the plurality of teeth insulators comprises: an insulator body for encompassing the teeth; and a plurality of heat-dissipating fins formed to protrude from the side surface of the insulator body so as to expand a contact area with the stator coil, and thus discharge heat of the stator coil, thereby maximizing cooling of coils through convection and conduction.

An electric machine includes a stator having a plurality of stator teeth. Each stator tooth of the plurality of stator teeth includes a winding disposed there around. Each stator tooth of the plurality of stator teeth is shaped to receive a plurality of microchannels. The microchannels contain a circulating heat-transfer fluid; Each stator tooth of the plurality of stator teeth is thermally exposed to the heat-transfer fluid via the plurality of microchannels so as to effectuate heat removal from each stator tooth of the plurality of stator teeth.

A cooling jacket for an electric motor comprises a fluid passage disposed adjacent to a stator and configured to convey a cooling fluid. The cooling jacket includes a flow mixing enhancer within the fluid passage adjacent an axial end of the stator. The flow mixing enhancer includes baffles, a porous fibrous structure, and/or an open-cell foam to provide greater thermal conductance at a region adjacent to the axial ends than it provides to a central region therebetween. A flow bridge directs the cooling fluid through circumferential flow paths adjacent to both of the axial ends before the cooling fluid is circulated in a central flow path around the central region of the stator. One or more nozzles direct a jet of cooling fluid upon the stator end winding, a rotor end winding, and/or printed circuit board. A ring-shaped coolant header may supply the cooling fluid to the nozzles.

A wedge for use in an electric machine includes a central portion comprising at least a first material, a first wing integrally attached to the central portion, and a second wing integrally attached to the central portion opposite the first wing, wherein the first wing, and the second wing include a second material.

Power semiconductor switching devices in an integrated motor drive are mounted directly to a circuit board substrate via a “pick and place” assembly process. The circuit board substrate is then mounted within the housing for the integrated motor drive and, preferably, in a generally central orientation within the housing. A potting material is provided within the housing of the integrated motor drive and around the circuit board. The potting material substantially encloses the circuit board and fills the volume within the integrated motor drive. The potting material is selected to provide good thermal conductivity between the circuit board and the housing of the integrated motor drive. The potting material is also selected to provide flexibility such that expansion and contraction of the potting material due to heating and cooling of the material does not damage the circuit board or the electronic components mounted to the circuit board.