Abstract: A linear motor including permanent magnets fixed on an elongate yoke such that polarities of the permanent magnets alternately change, and an armature having cores and coils wound on the respective cores, wherein each row of the permanent magnets and the armature are moved relative to each other along a straight line by application of an electric current to the coils, each core extending in a first direction perpendicular to the permanent magnet row, the cores being arranged in a second direction perpendicular to the first direction and disposed on the cores such that the coils on the cores adjacent to each other are arranged in a zigzag pattern and spaced apart from each other in the first direction, with a gap left therebetween, wherein the armature includes a heat pipe having opposite end portions one of which is inserted in the gap and the other of which extends outwardly of the gap, and fins fixed to the other end portion of the heat pipe.

Abstract: A spindle motor includes a stator unit and a rotor unit supported to be rotatable with respect to the stator unit. The stator unit includes a stator, a base portion including a through hole, and a circuit board. The circuit board includes a connection portion to which a conductive wire from the stator is connected after passing through the through hole, and an extending portion arranged to extend from the connection portion. A lower surface of the base portion includes a recess portion arranged to accommodate the connection portion, and a groove portion arranged to extend from the recess portion to have the extending portion arranged therein. A bottom surface of the groove portion includes a protrusion portion arranged to protrude downwards.

Abstract: An electric motor has a stator in which an armature is disposed. The armature has a lamination stack having slots in which magnet wires are wound. An armature shaft extends coaxially through the lamination stack and a commutator is disposed on the armature shaft to which ends of the magnet wires are electrically coupled. The magnet wires are at least partially encased in thermally conductive plastic. When the thermally conductive plastic is molded, a balancing feature is formed of the thermally conductive plastic. In aspects, the balancing feature can include a layer of the plastic from which plastic can be removed during balancing; one or more balancing rings adjacent axial sides of the lamination stack from which plastic can be removed to balance the armature; or one or more balancing rings having one or more pockets therein in which one or more weights are disposed to balance the armature.

Abstract: A radial gap motor/generator that may be air or liquid cooled. The motor/generator has a stator in radially spaced relation to at least one thin annular induction structure. The motor/generator has at least two spaced apart annular rings each having an inner surface and outer surface, the annular rings having a permanent magnet structure embedded between the inner surface and outer surface of the annular rings. The motor/generator has at least two spaced apart radial gaps, the first gap between the first annular ring and the induction structure and the second gap between the second annular ring and the induction structure, the stator being disposed between the gaps. The motor/generator may include multiple gaps and multiple annular induction structures to increase the overall power density of the system.

Abstract: The invention relates to a stator for an electric motor having a base body composed of stator laminates which are axially in layers with respect to a motor axis and having a number of frame-like coil formers which are fitted with stator windings, with the coil cross-sectional surfaces of said frame-like coil formers essentially being directed at the motor axis. It is proposed that in order to fit them, the coil formers can first of all be placed obliquely with respect to a final position on coil former holders of the base body and can then be aligned in the final position, and in that the arrangement is designed such that the alignment involves axial bracing of the stator laminates.

Abstract: A stator segment arranged to define a portion of an annular stator includes a core segment including a core back portion arranged to extend in a circumferential direction of the stator, and a tooth portion arranged to extend from the core back portion in a radial direction of the stator; a coil wound around the tooth portion and including a pair of coil wire terminals; an insulating layer arranged between the coil and the tooth portion; and a resin layer arranged to seal the entire coil except for the pair of coil wire terminals. Circumferential end walls of the resin layer are arranged circumferentially inward of circumferential end walls of the core back portion.

Abstract: A stator is compatible with a variety of wiring configurations and possesses excellent versatility, while also preventing an increase in the size of a busbar unit. The stator includes a plurality of stator segments joined together to assume a cylindrical shape. Each stator segment includes a core segment including a core back portion and a tooth portion; a coil including a pair of coil wire terminals; an insulating layer arranged between the coil and the tooth portion; and a resin layer arranged to have the entire coil except for the coil wire terminals embedded therein. The resin layers of the stator segments include a supporting structure defined therein to allow a wiring member to be connected with any of the coil wire terminals to be attached to and removed from the stator.

Abstract: A radial flux permanent magnet AC motor/generator employs a flat circular stator plate having a plurality of separately-formed electromagnets mounted in a ring pattern on a top surface thereof. A circular flux ring fabricated of powdered metal is mounted to the stator plate outside the ring of electromagnets. A plurality of permanent magnets are mounted in a ring pattern on the outer cylindrical surface of a steel rotor. The stator plate and rotor are axially and diametrically aligned such that the ring of permanent magnets rotates in close proximity to and inside the ring of electromagnets. The electromagnets utilize powder metal cores shaped to have rounded corners and flat sides that permit the use of heavier gauge windings and eliminate the air gaps that exist between the core and windings of prior art electromagnets.

Abstract: A spindle motor includes a stator unit and a rotor unit. The stator unit includes a stator, a base portion, and a printed circuit board. The printed circuit board has a connection portion and an extending portion extending from the connection portion. The base portion is provided on its lower surface with a recess portion arranged to accommodate the connection portion of the printed circuit board and a groove portion in which the extending portion is arranged, the groove portion communicating with the recess portion. The groove portion has a bottom surface on which the extending portion is arranged and a slant surface gradually sloping downwards as it extends away from the bottom surface in a circumferential direction. The region in the recess portion extending from the connection portion to a boundary between the recess portion and the groove portion is covered with a cured flowable resin material.

Abstract: An electric water pump may include a stator generating a magnetic field according to a control signal and a rotor rotated by the magnetic field generated at the stator and pressurizing coolant. According to the electric water pump, the stator may include, a stator core formed by stacking a plurality of pieces made of a magnetic material, an insulator connecting pieces of the stator core to each other, a coil coiling the stator core so as to form a magnetic path, a Hall sensor detecting a position of the rotor, a Hall sensor board controlling the control signal supplied to the stator according to the position of the rotor detected by the Hall sensor, and a stator case wrapping and sealing the stator core, the insulator, the coil, the Hall sensor, and the Hall sensor board.

Abstract: Embodiments of the invention provide an electric machine module including a housing. The housing can include a machine cavity. In some embodiments, an electric machine can be at least partially positioned within the machine cavity and can include a stator assembly. The stator assembly includes a stator core with slots, a weld end, and an insertion end. In some embodiments, conductors can be positioned in the slots so that portions of the conductors extend from the weld end and the insertion end. An insulation member including recesses can be coupled to at least a portion of the conductors that extend from the weld end of the stator assembly.

Abstract: A motor includes a stator having a stator iron core wound with stator windings, a rotor rotatably mounted on a shaft, a bearing for supporting the shaft, and a conductive bracket for fixing the bearing. The rotor is formed of a rotary body that holds a permanent magnet and the shaft that extends through the rotary body at center and joined to the rotary body. An electrostatic capacity between the shaft and an outermost wall of the rotary body is set smaller than an electrostatic capacity between an inner ring and an outer ring of the bearing during rotation of the bearing.

Abstract: A stator arrangement particularly suitable for use in an air-cooled generator or other such electric machine includes a stator with an outer stator surface, an opening therein defining an inner stator surface, and longitudinally opposed stator end surfaces. Conductive coils are supported by the stator, and include end turns overlying the longitudinally opposed stator end surfaces. In order to block out environmental contaminants and prevent conductive coil shorting, protective barriers are mounted over the end turns and secured to the stator.

Abstract: A stator of a rotary electric motor has core segments. All or some of the core segments have terminal mounting members for mounting terminals to which coils are connected. The terminal mounting member and the bobbin for each of the core segments are molded by resin and integrated with the corresponding core segment.

Abstract: The invention relates to a brushless electric motor—preferably for a vehicle fan—having an armature which is supported on both sides in a housing, wherein the housing consists substantially of a plastic-containing material and is provided with a preferably substantially tapered casing section as well as two cover sections onto or into both cover sections one bearing each is formed for the armature shaft, and said two cover sections being connected to each other via the casing section and being supported by each other, as well as a stator assembly which extends between the housing casing and the armature wherein the housing is further provided with at least one molded body made of a plastic-containing material for receiving the stator assembly while at the same time determining the axial and radial position, said molded bodies, in turn, being clamped between the cover sections and the casing section in a radial and axial direction, and in this way reinforcing the housing.

Abstract: An electric motor, having a stator, on which a coil for generating a commutated magnetic rotating field, and a rotor having a permanent magnet element. The rotor is mounted rotatably on an axis. A force acts between the commutated magnetic rotating field and the magnetic field of the permanent magnet element to rotate the rotor about the axis. To provide an electric motor in which the permanent magnet element is fastened on the rotor in a cost-effective and long-term stable manner. The torque generated by the electric motor should be as large as possible, the permanent magnet element protrudes in an axial extension thereof beyond the stator. The part of the permanent magnetic element that protrudes beyond the stator is covered by an overmolding made of a plastic material, said overmolding fixes the permanent magnet element in the position thereof on the rotor.

Abstract: A brushless, liquid or air cooled, direct current motor formed from a three stack stator and three section rotor assembly using an integrated water cooled or air cooled housing and over-molding techniques.

Abstract: A stator structure, including strip shaped stator cores and end insulators. The end insulators are injection molded with the strip shaped stator cores, as a whole. A wire duct is arranged on top of a yoke of each strip shaped stator core and at the bottom of each end insulator. Two ends inside the wire duct are projected with bosses. Coil windings wind around the bosses and pass through the wire duct. The stator structure is simple and easy to mass produce. It can make full use of the slot filling ratio of the strip shaped stator. The invention solves the puncture problem.

Abstract: An example stator assembly includes a stator for establishing a core side of a channel. A plurality of stator windings are secured relative to portions of the stator core. The plurality of stator windings establish a winding side of the channel. At least a portion of the channel is configured to communicate a cooling fluid from a first axial end of the stator core to an opposing axial end of the stator core.

Abstract: A high power rotary device includes a stator comprising a plurality of wire coils each surrounding a non-magnetizable core; a rotor with permanent magnets embedded therein, the rotor being disposed adjacent to the stator, the rotor being mounted on a rotatable drive shaft; a position sensor operably connected to the rotor; and a control circuit operably connected to the position sensor and the wire coils to activate the wire coils. In this motor the control circuit transfers electrical charge from a first coil to a second coil.

Abstract: A brushless motor, to be used in a washing machine, includes a stator, a rotor, a magnetic sensor, and a drive circuit. The magnetic sensor and the drive circuit are accommodated in a case, and sealed with moisture-proof sealing resin, thereby forming a drive circuit unit, which is built in the brushless motor.

Abstract: An electric motor includes a stator and a rotor. The stator includes a stationary shell, a polymer element located in the stationary shell, a coil unit located in the polymer element, two covers each connected to a related one of two opposite sides of the stationary shell, two caps each attached to a related one of the covers, and two bearings each fit in a related one of the caps. The rotor includes an axle inserted through the coil unit and supported on the bearings, two shields each connected to a related one of two opposite sides of the axle, and two groups of magnets. Each of the groups of magnets is connected to a related one of the shields.

Abstract: An electric motor includes: a stator of columnar shape including a stator core of annular shape and mold resin molding the stator core, the stator core accommodating a rotor configured to rotate about a rotary shaft; and a position detecting circuit board including a position detecting element configured to detect a position of the rotor. The stator has a cavity for accommodating the rotor. One end of the cavity is covered by the mold resin. The position detecting circuit board is placed on an opposite side from the rotor across the mold resin covering the one end of the cavity.

Abstract: A permanent magnet motor has a rotor and a stator. The rotor has a shaft, a rotor core and commutator fixed to the shaft, and rotor windings wound about poles of the rotor core and electrically connected to the commutator. The stator has an axially extending round housing, a ring magnet member fixed to an inner surface of the round housing, an endcap, and at least one pair of brushes in sliding contact with the commutator. A chamber is formed by the housing and the endcap. The commutator is disposed in the chamber. A window lift device incorporating the motor is also provided.

Abstract: An electric motor includes: a stator of columnar shape including a stator core of annular shape and mold resin molding the stator core, the stator core accommodating a rotor configured to rotate about a rotary shaft; and a temperature detecting element buried in the mold resin. The stator core includes a plurality of stator teeth around which a coil wounded around respectively. The temperature detecting element is buried in the mold resin from any one of the pair of end surfaces at a position between two adjacent stator teeth.

Abstract: A voltage regulator negative electrode terminal is mounted to an axially outer end surface of a rear bracket so as to be in a state of electrical connection with the rear bracket by fastening a flange portion to a mounting pedestal of the rear bracket using a voltage regulator fixing second screw. A screw loosening restricting lug is disposed so as to project from a floor portion of a protective cover so as to face the voltage regulator fixing second screw so as to have a predetermined clearance in an axial direction.

Abstract: A cooling structure of a rotating electric machine includes a rotor core formed of a plurality of electromagnetic steel plates and a resin molding portion molding the rotor core with resin. The rotor core is provided with a through hole passing therethrough in the axial direction of the central axis that is a rotation axis. The rotor core is provided inside the through hole with an oil passage through which oil circulates. The resin molding portion has a cover portion covering the outer peripheral side of the oil passage. This configuration can provide the cooling structure of the rotating electric machine that achieves efficient cooling while suppressing occurrence of energy loss.

Abstract: A rotor assembly including a rotating shaft, a rotor core, a permanent magnet, a magnetic ring support, and a magnetic ring. The permanent magnet is mounted on the outer side surface of the rotor core. The magnetic ring is nested on the magnetic ring support, and the magnetic ring support and the rotor core are made as a whole by injection molding. The rotor assembly is relatively simple to produce, low in cost, and features improved efficiency.

Abstract: A motor assembling method is disclosed. The motor assembling method provides a base with a shaft tube, wherein the shaft tube has a thermoplastic positioning portion on an opening end thereof, and a shaft tube assembly is disposed into the shaft tube via the opening end. The motor assembling method further heats the thermoplastic positioning portion by a heating fixture to melt and deform the thermoplastic positioning portion until the opening end of the shaft tube has shrunk, wherein the shaft tube assembly is held in position in the shaft tube after the thermoplastic positioning portion has cooled down and solidified. The motor assembling method further couples a stator unit with an outer circumferential wall of the shaft tube, and couples a rotor with the shaft tube.

Abstract: A motor assembling method is disclosed. The motor assembling method provides a base with a shaft tube, wherein the shaft tube has a thermoplastic positioning portion on an opening end thereof, and a shaft tube assembly is disposed into the shaft tube via the opening end. The motor assembling method further heats the thermoplastic positioning portion by a heating fixture to melt and deform the thermoplastic positioning portion until the opening end of the shaft tube has shrunk, wherein the shaft tube assembly is held in position in the shaft tube after the thermoplastic positioning portion has cooled down and solidified. The motor assembling method further couples a stator unit with an outer circumferential wall of the shaft tube, and couples a rotor with the shaft tube.

Abstract: Power generation efficiency is improved with a simple configuration. A braking device is provided with a brake rotor which rotates on a central axis, and friction portions which are in frictional contact with the brake rotor. A coil is wound around the outer peripheral portion of the brake rotor. A friction portion has the north pole of a magnet, and a friction portion has the south pole of a magnet. The braking device generates electricity by using an electromagnetic induction phenomenon and an electrostatic phenomenon that are caused by the interaction between the outer peripheral portion and the friction portion, for example, at the time of braking. As a result, the configuration can be simplified and the amount of power generation is not likely to be limited by a motor capability because there is very little need to use the motor as a generator.

Abstract: Disclosed is a split stator manufacturing method, which is enabled to enhance a production efficiency and to charge a thermoplastic resin between an insulator and a coil by molding the resin. The split stator manufacturing method comprises a setting step of setting an insulator and a split stator core element in a stationary mold and setting an edgewise coil in a movable mold, a resin injecting step of injecting a resin into a cavity with the stationary mold and the movable mold being half-opened, and a clamping step of clamping the stationary mold and the movable mold.

Abstract: It is an object of this invention to provide a motor with a structure including a bearing only on one side whose assembly accuracy can be easily increased. In a stepping motor including a shaft as a rotating shaft of a rotor and a bearing which rotatably supports the shaft, the bearing is provided only on one side of the shaft, and a one-piece molded member is provided, the one-piece molded member obtained by integrally molding, from resin, the bearing and at least one on the bearing side of a front plate and an end plate.

Abstract: A hand-held power tool with a drive motor and a gear mechanism has elastomer elements moulded onto the inner side of the housing. At least two elastomer elements form elastomer bearings for bearing the drive motor.

Abstract: A brushless, liquid or air cooled, direct current motor formed from a three stack stator and three section rotor assembly using an integrated water cooled or air cooled housing and over-molding techniques.

Abstract: An electric motor has a wound stator and a permanent magnet rotor. The rotor includes a shaft, a hub fixed on the shaft, a plurality of rotor core segments and magnets fixed around the hub, and a pair of covers fixed to axial ends of the rotor core segments. The hub and covers are formed on the rotor core segments by inserting molding and one of the covers has openings to allow the magnets to be inserted into spaces formed between adjacent rotor core segments such that the rotor core segments and magnets are alternately arranged in a circumferential direction of the rotor.

Abstract: A magnet comprising grains of a ferromagnetic material whose main component is iron and a fluorine compound layer or an oxy-fluorine compound layer of fluoride compound particles of alkali metals, alkaline earth metals and rare earth elements, present on the surface of the ferromagnetic material grains, wherein an amount of iron atoms in the fluorine compound particles is 1 to 50 atomic %.

Abstract: The invention relates to an electric motor with a stator and an external rotor, comprised of a rotor bell and a rotor cover that acts as a fan wheel. The rotor bell has several apertures in its bell floor. The rotor cover has several exhaust ports. The rotor cover is shaped like a plate and consists of a plate base and an annular wall. The exhaust ports are preferably evenly distributed in the annular wall. The inside of the plate base of the rotor cover that faces the rotor bell has several radially extending interior blades that are fixedly connected to it.

Abstract: An electric motor comprising an annular stator core, a resin molding the stator core, a casing member housing the stator core, wherein the casing member has an opening, and the resin is filled into the opening.

Abstract: A fan motor for circulating cooled air including: a stator assembly having a stator core having teeth ends protruded annularly outwardly and coils wound on the teeth ends of the stator core and molded out of resin to have a donut-like shape having a bearing insertion hole formed to be passed vertically through the center thereof; a bearing assembly adapted to be insertedly fixed into the bearing insertion hole of the stator assembly; and a rotor fan assembly having a rotor having a cup-shaped case, a rotor shaft formed in the center of the case in such a manner as to be passed vertically through the center of the case, and magnetic poles formed along the inner periphery of the case, and a fan having a hub coupled to the top end periphery of the rotor shaft of the rotor and blades disposed around the hub.

Abstract: A new configuration for a double-sided rotor, radial flux, air-cored, permanent magnet electric generator (1) is disclosed. The generator (1) includes two radially spaced apart rotor portions (33, 35) defining an air gap between them and each having a plurality of alternating polarity permanent magnets (41) arranged on their inner surfaces, mounted for rotation in the air gap. A modular stator (43) is positioned in the air gap and includes a base (45) having attachment formations (60) spaced apart about its surface and a plurality of individually moulded, polymeric resin stator modules (53). Each stator module (53) has complementary attachment formations (59) for attachment to the base (45) and includes at least one non-overlapping compact wound coil (61) which is embedded within the resin.

Abstract: An axial-flux brushless electric motor which can be used in various applications, including, for example, driving a propulsion wheel of a vehicle. In one embodiment, the electric motor comprises a rotor comprising a plurality of permanent magnets defining a plurality of rotor poles. The electric motor also comprises a stator axially spaced from the rotor and comprising: at least one winding for conducting current; an electronic controller for controlling the current supplied to the at least one winding to rotate the rotor; and consolidating material in which the at least one winding and the electronic controller are embedded.

Abstract: An electric motor has a stator in which an armature is disposed. The armature has a lamination stack having slots in which magnet wires are wound. An armature shaft extends coaxially through the lamination stack and a commutator is disposed on the armature shaft to which ends of the magnet wires are electrically coupled. The magnet wires are at least partially encased in thermally conductive plastic. When the thermally conductive plastic is molded, a balancing feature is formed of the thermally conductive plastic. In aspects, the balancing feature can include a layer of the plastic from which plastic can be removed during balancing; one or more balancing rings adjacent axial sides of the lamination stack from which plastic can be removed to balance the armature; or one or more balancing rings having one or more pockets therein in which one or more weights are disposed to balance the armature.

Abstract: The invention relates to a stator (1) of an electrical machine (10), the electrical machine (10) itself, and a manufacturing method. The stator (1) has a meandering cooling channel (18), wherein the meandering cooling channel (18) is embedded in an element (22), wherein the element (22) comprises a material which is influenced thermally so as to form a shape of the element (22), wherein an iron-containing body (3), for guiding a magnetic field of the stator, is embedded in the element (22).

Abstract: A permanent magnet rotating electrical machine comprises a stator with a stator coil applied in a plurality of slots provided in a stator core, a rotor disposed opposite to the stator with a predetermined gap interposed therebetween, the rotor including a permanent magnet embedded in each of magnet-insertion holes provided in a rotor core of the rotor while polarity of the permanent magnet being varied on a pole-by-pole basis, and end plates disposed at ends of the rotor core, in the axial direction thereof, respectively, in which one end plate of the end plates disposed at the ends of the rotor core, in the axial direction thereof, respectively, is also provided with magnet-insertion holes, and each of the magnet-insertion holes provided in the one endplate is filled up with a non-magnetic material, thereby stopping up each of the magnet-insertion holes provided in the end plate.

Abstract: A rotary electric machine according to an embodiment includes a substantially cylindrical rotator that is freely rotatably supported, a stator, and a bracket that supports the rotator and the stator. The stator includes stator coils in which a plurality of air-cored coils are arranged in a ring shape and are integrated by resin, each of the air-cored coils being formed by winding a round copper wire and having an outer shape subjected to pressure molding, and stator cores divided for each of teeth.

Abstract: A temperature protection device for a brushless DC Motor, wherein a thermal fusing type protector is provided at a depression formed on a casing of the plastic-packaged brushless DC Motor. In this way, the thermal fusing type protector can be provided conveniently at a position where the casing temperature is highest after plastic packaging, and if the protector is fused due to high temperature, it can be replaced easily.

Abstract: The present invention is characterized in that it does not require specific fastening tools, which causes breakage or defects, or bonding work, because a brushless DC motor includes an insulator that is inserted in a stator to insulate a coil wound with led magnet wires and has at least one or more locking portions with locking grooves stepped on the inner side along the circumference and an outlet connector that has hooks fitted in the locking protrusions when being assembled with the insulator such that the insulator and the outlet connector are assembled in fitting and locking ways in assembling.

Abstract: The circuit board includes: a first resin-molded body; a second resin-molded body; and a plurality of terminals each including: a positive electrode terminal portion to which is connected a lead of the positive-side rectifying element to be connected thereto; a negative electrode terminal portion to which is connected a lead of the negative-side rectifying element to be connected thereto; and a trunk portion that links the positive electrode terminal portion and the negative electrode terminal portion. The plurality of terminals are each held between the first resin-molded body and the second resin-molded body so as to be separated from each other such that the trunk portion is disposed between mating surfaces of the first resin-molded body and the second resin-molded body, the positive electrode terminal portion is inserted through the second resin-molded body, and the negative electrode terminal portion is inserted through the first resin-molded body.

Abstract: A rotor for an electrical motor includes a spindle, a plurality of sintered permanent magnets arranged around the spindle, a compacted powdered soft magnetic material at least partially surrounding the plurality of sintered permanent magnets, and a plurality of discrete regions of compacted powdered non-magnetic material at least partially surrounding the plurality of sintered permanent magnets. The discrete regions of non-magnetic material are at least partially embedded in the soft magnetic material and the soft magnetic material and the non-magnetic material couple the plurality of sintered permanent magnets with the spindle.