Abstract: An electrically driven eccentric weight industrial vibrator comprises a housing, a stator, a rotor, and at least one eccentric weight. The housing defines an internal chamber. The stator is positioned within the internal chamber of the housing and is fixed in rotation relative to the housing. The rotor encircles the stator and is rotationally connected to the stator and the housing in a manner such that the rotor is able to revolve around the stator within the internal chamber of the housing. The eccentric weight is mounted to the rotor in a manner such that the eccentric weight is able to revolve about the stator together with the rotor.

Abstract: A thin axial gap motor includes: a base, a circuit unit installed on the base; a stator module including at least one flat permeable frame and at least one winding, and the permeable frame having at least one support arm and an induced magnetic part connected to the at least one support arm, and the winding being wound around the support arm; a rotor module including a flat permanent magnet installed at the top of the induced magnetic parts and having an orthographic projection range corresponsive to the area of the induced magnetic part, and the at least one winding being disposed on an outer side of the permanent magnet; and a pivoting element installed between the base and the rotor module and including a bearing housing and a spindle plugged into the bearing housing for rotating the rotor module with respect to the base.

Abstract: An axial flux electrical machine includes a housing having a center portion with a cylindrical wall, a stator assembly attached to the housing, a bearing assembly attached to the stator assembly, and a rotor assembly rotatably attached to the bearing assembly. A bearing mount system includes a bearing isolator that is attached to the wall of the housing, and a bearing cup that is attached to the bearing assembly and the bearing isolator.

Abstract: An axial-gap motor-generator includes a case, a rotor, a stator, a cooling plate, an air inlet, an outlet, an airflow generating groove, and a radial groove. The rotor is rotatable around a rotating shaft. The stator is fixed to the case. The stator has a first distal end and a second distal end. The first distal end faces the rotating shaft. The cooling plate is in contact with the second distal end. The stator is disposed between the rotating shaft and the cooling plate. The first distance between the air inlet and the rotating shaft is smaller than a second distance between the air outlet and the rotating shaft. The airflow generating groove is provided between the case and the rotor. The radial groove is provided between the case and the cooling plate via which the airflow generation groove is connected to the air outlet.

Abstract: A brushless DC motor includes a stator formed of a lamstack including a plurality of stacked laminations. The stator includes a plurality of radially extending core members and a circumferential wall. An intersection of each of the plurality of radially extending core members with the circumferential wall defines a flux null location, and a portion of the lamstack defines a first opening located at one of the flux null locations. The brushless DC motor includes a printed circuit board including a second opening and a grounding member including a first section received in the first opening of the stator and a second section received in the second opening of the printed circuit board to create a grounding path.

Abstract: A motor includes a base, a winding assembly and a rotor. The base includes a pivoting portion. The winding assembly includes a support. The support includes at least one coil supporting portion and a circuit supporting portion connected to the at least one coil supporting portion. A coil is arranged on each of the at least one coil supporting portion. A circuit is arranged on the circuit supporting portion and electrically connected to the coil or coils. A folding portion is arranged between the at least one coil supporting portion and the circuit supporting portion. The circuit supporting portion and the at least one coil supporting portion are folded and stacked together via the folding portion. The rotor is rotatably coupled to the pivoting portion of the base. Due to the arrangement of the folding portion, a radial width of the motor is efficiently reduced.

Abstract: A high torque axial gap electric motor includes rotor and stator disks containing magnets fixed to their respective faces, where the magnets contain triangular ridges arranged in concentric circles. The face of each rotor magnet ridge is parallel to the face of a stator magnet ridge, creating an air gap with a cross-section that has a zigzag appearance. The preferred embodiment uses a three-phase motor design with multiple rotors and stators and permanent magnets.

Abstract: There is provided a contact type power feeding apparatus in which, even if a brush Br disposed in a space between the axis body and the cylinder body that are disposed concentric with each other wears out as a result of sliding, contact can be surely secured between the brush and the axis body as well as the cylinder body, thereby efficiently causing electric current to flow between the two. A brush Br has first brush pieces each having an inner wall surface to make surface-contact with an outer peripheral surface of the axis body; and second brush pieces each having an outer wall surface to make a surface-contact with an inner peripheral surface of the cylinder body. The brush is constituted by alternately arranging, in the circumferential direction, the first brush pieces and the second brush pieces in a state of keeping them in surface-contact with each other.

Abstract: An electric machine is provided for a dual voltage power system having a first energy storage system (HV-ESS) with a first nominal voltage and second energy storage system (LV-ESS with a second nominal voltage). The electric machine includes a rotor assembly having a rotor core configured to support permanent magnets spaced around the rotor core to define a number of rotor poles. The rotor core has multiple rotor slots arranged as at least one barrier layer at each of the rotor poles. Permanent magnets are disposed in the at least one barrier layer. A stator assembly surrounds the rotor assembly. The electric machine is configured to be operatively connected with the HV-ESS. The electric machines has at least one of a predetermined efficiency at rated power, a predetermined power density, a predetermined torque density, a predetermined peak power range, or a predetermined maximum speed of the electric machine.

Abstract: A vibration motor includes a weight that rotates about a shaft, and has a centroid position different from a central axis of the shaft, a case with a protrusion portion that extends from a lower end of the circumferential surface portion, and a lower end portion of the shaft is fixed to a stator portion. A base of the vibration motor includes a concave portion that is recessed from a radially outer side of the base to a radially inner side of the base at a position overlapping the protrusion portion at a circumferential edge of the base. The entire protrusion portion or a portion of a tip end side in a direction in which the protrusion portion extends is bent radially inside the base so that a surface of the protrusion portion which is toward an upper side is in contact with the base.

Abstract: This centrifugal blood pump apparatus includes an impeller (10) provided in a blood chamber (7), and a plurality of coils (20) provided in a motor chamber (8) for driving the impeller (10) to rotate with a dividing wall (6) interposed therebetween. A flexible substrate (23) in the shape of a strip is arranged to surround outer circumferences of the plurality of coils (20), and is connected to the plurality of coils (20) and a connector (24). A driving voltage (VU, VV, VW) is externally supplied to the plurality of coils (20) via the connector (24) and the flexible substrate (23). Thus, assembling workability, productivity and reliability are improved.

Abstract: Disclosed is an anti-separating structure of a sensing magnet for EPS motor, the structure being a coupling structure between the sensing magnet and a plate of the EPS motor, the structure including a disk-shaped plate formed with a magnet accommodation unit protrusively formed near at a rotation shaft, a ring-shaped sensing magnet centrally formed with a through hole having a diameter corresponding to the magnet accommodation unit, and magnet grip units each formed at a predetermined gap along a circumferential surface of the magnet accommodation unit.

Abstract: A pendulum-type electromagnetic actuator is provided. The actuator includes a curved stationary member comprising a stationary core and a winding wound about the stationary core. A first moving member includes a first moving core and a first plurality of permanent magnets attached to the first moving core, the first moving member is curved and positioned on a first side of the stationary member. A second moving member includes a second moving core and a second plurality of permanent magnets attached to the second moving core, the second moving member is curved and position on a second side of the stationary member, the second side opposite the first side. The actuator further includes a pivot and a pivot connector connecting at least one of the first moving member and the second moving member to the pivot such that the curved moving member rotates about the pivot.

Abstract: An electric machine comprise a first carrier having an array of electromagnetic elements and a second carrier having electromagnetic elements defining magnetic poles, the second carrier being arranged to move relative to the first carrier. An airgap is provided between the first carrier and the second carrier. The electromagnetic elements of the first carrier include posts, with slots between the posts, one or more electric conductors in each slot, the posts of the first carrier having a post height in mm. The first carrier and the second carrier together define a size of the electric machine. The magnetic poles having a pole pitch in mm. The size of the motor, pole pitch and post height are selected to fall within a region in a space defined by size, pole pitch and post height that provides a benefit in terms of force or torque per weight per excitation level.

Abstract: A redundant brushless drive system, including a coil (12) having first and second phase windings operable independently of one another and first and second independently operable sensor groups for the rotational position of a rotor (11) and for commutation of the phase windings. The first and second sensor groups are positioned along the motor axle one-behind-the-other parallel to each other and symmetrical to the motor axle (10). An encoder circuit board (7) is configured such that an association of the sensor groups (G1, G2) to a phase winding (W1, W2) is configurable such that either the first sensor group (G1) is used for controlling the first phase winding (W1) and the second sensor group (G2) for controlling the second phase winding (W2), or the first sensor group (G1) is used for controlling the second phase winding (W2) and the second sensor group (G2) for controlling the first phase winding (W1).

Abstract: A vernier machine includes a rotor, permanent magnets mounted as spokes in pole pairs within the rotor, a first stator, a second stator, a first stator winding wound about the first stator to form a number of poles between a first set of terminals, and a second stator winding wound about the second stator to form the number of poles between a second set of terminals. The first stator and the second stator each include slots and teeth. The first stator and the second stator are mounted on opposite sides of the rotor with each separated by an air gap. The teeth of the first stator are offset from the teeth of the second stator by a half slot pitch relative to the rotor. A number of the pole pairs of the rotor is greater than the number of poles of the first stator winding.

Abstract: An axial flux stator includes a plurality of magnetically permeable members, a plurality of windings, a back iron, and an encasing. The plurality of windings is associated with the plurality of magnetically permeable members to produce a plurality of winding-magnetically permeable member assemblies. The back iron is mechanically butt joint coupled to the plurality of winding-magnetically permeable member assemblies. The encasing maintains the butt joint coupling of the back iron to the plurality of winding-magnetically permeable member assemblies.

Abstract: A reluctance motor having a rotor and a stator that has a wound core, around which a stator coil is wound and which is open on one side and has legs, said legs being arranged around the periphery and forming spaced-apart pairs of legs. Multiple rotor teeth which are distributed around the periphery and periodically establish a magnetic flux between the legs radially engage between the legs. In order to positively change the characteristic curve of the magnetic flux of the legs and teeth, the teeth continuously form an area overlap with the legs in the direction of rotation of the rotor in accordance with the angle of rotation.

Abstract: A drive arrangement includes a housing having two chambers and a partition defining an annular space within the housing. A disk is mounted on a shaft of the drive arrangement and includes an annular portion disposed within the annular space. A face of the annular portion is axially spaced from the partition by a gap clearance. An axial dimension of the gap clearance is such that rotation of the disk generates a negative pressure gradient for drawing fluid from the first chamber through the gap clearance in a radial direction toward the rotation axis. The fluid then moves along the face of the disk in a radial direction away from the rotation axis under centrifugal action of the rotating disk. The outer periphery of the disk is spaced from the housing to permit fluid to pass, by centrifugal action, from the outer periphery toward a second chamber.

Abstract: An electrical machine including a stator and a rotor rotatable relative to the stator with an air gap therebetween. The stator includes a first plurality of sources of magnetic field, which is equally spaced in a circumferential configuration over the stator. The rotor includes a second plurality of sources of magnetic field, which is equally spaced in a circumferential configuration over the rotor. The magnetic sources of at least one plurality are electromagnets and electromagnet includes at least one magnet coil resting on a magnet conductor. The magnetic conductor includes at least one member made of magnetically isotropic and/or anisotropic materials.

Abstract: An electrical machine has a drive shaft, a rotor affixed to the drive shaft and extending outwardly therefrom in which the rotor has at least one slice of a ferromagnetic material, a first plate positioned over and around the shaft and positioned adjacent to one side of the slice so as to have a portion extending radially outwardly beyond the circumferential surface of the slice, a second plate positioned over and around said shaft and positioned adjacent to another side of the slice so as to have a portion extending radially outwardly beyond the circumferential surface of the slice, and a magnet affixed to the circumferential surface in a location between the first and second plates.

Abstract: There is provided a wind power installation comprising a rotor to which rotor blades can be fitted, an electric generator having a generator stator and a generator rotor, and a plurality of displacement units. The first end of the displacement unit is fastened to the generator stator and the second end of the displacement unit is releasably fastened to the generator rotor. The displacement units each have a respective hydraulic cylinder, the deflection of which is controllable so that by actuation of the displacement unit the generator rotor is displaced relative to the generator stator.

Abstract: A rotary input device includes a first annular magnetic body in which a plurality of outward protrusions protruding toward an outside in a radial direction are disposed along a circumferential direction, a second annular magnetic body in which a plurality of inward protrusions formed to oppose the outward protrusions of the first magnetic body are disposed along a circumferential direction, and a rotary knob configured to relatively rotate the first magnetic body and the second magnetic body. The first magnetic body includes a magnet in which opposing surfaces facing each other are vertically disposed and which is magnetized to two poles of an upper pole and a lower pole including the opposing surfaces, a pair of yokes that interposes the opposing surfaces of the magnet vertically, and the outward protrusion formed on the pair of yokes.

Abstract: A sensor comprises an inductor for sensing an alternating current signal component of an observed signal. The inductor comprises a substrate, conductive traces associated with different layers of the substrate, and one or more conductive vias for interconnecting the plurality of conductive traces. A magnetic field sensor senses a direct current signal component of the observed signal. A first filtering circuit has a high-pass filter response. The first filtering circuit is coupled to the inductor to provide a filtered alternating current signal component. A second filtering circuit has a low-pass filter response. The second filtering circuit coupled to the magnetic field sensor to provide a filtered direct current signal component. A sensor fusion circuit determines an aggregate sensed current based on the filtered alternating current signal component and the filtered direct current signal component.

Abstract: An electric power steering electric motor apparatus includes: an electric motor including: a motor housing; a stator; a rotor; and a power supplying portion that supplies electric power to the stator; and a controlling unit including: a driving circuit that supplies electric power to the electric motor; a connecting portion; a controlling circuit; and a case that covers the driving circuit and the controlling circuit, the electric motor and the controlling unit being mounted coaxially onto a gear housing that reduces rotational speed of the electric motor so as to position the controlling unit on a side near the gear housing, and the connecting portion being connected to the power supplying portion inside the case through an opening portion formed on the case, and being positioned and held by an insulating member so as to be insulated from the case and the motor housing.

Abstract: A method for producing a brushless DC (BLDC) motor includes: providing a stator, a rotor having a shaft and a carrier element having a cutout through which the shaft passes, on which surface a plurality of Hall sensors are arranged with respect to the center point of the shaft, the carrier element being arranged fixedly with respect to the stator; prefixing a permanent magnet wheel with transducer magnets, on the shaft on a side of the carrier element facing away from the rotor magnet; setting the shaft into rotary motion, and detecting measurement signal profiles of the Hall sensors and measurement signal profiles representative of voltages induced in the coils depending on the rotor magnets; determining an adjustment angle for the permanent magnet wheel; rotating the permanent magnet wheel with respect to the shaft corresponding to the determined adjustment angle; and fixing the permanent magnet wheel on the shaft.

Abstract: A machine having a wound rotor (102) comprising a manifold (112) that includes a set of blades (131) and longitudinal notches (133). Rotor (102) also comprises a winding (108) formed of a set of conductors (134) that each comprise two arms (135.1, 135.2), connected together by a base (136). The curve, representing the electromotive force (EMF) generated by the rotor (102) on the basis of the angle of rotation of the rotor, is linear and steep in a switching region, and the notches (133) are angularly shifted relative to the blades (131) so that each notch (133) is located opposite a junction between two blades. The machine may relate to a starter fitted with the machine.

Abstract: According to one embodiment, there is provided an axial gap type permanent magnet electric rotating apparatus including a first and second rotor. All a magnetic-pole directions of a permanent magnets of the first and second rotor are the same. A portion between two permanent magnets along a circumferential direction of each rotor is made of a magnetic material having substantially the same size as that of the permanent magnet such that axial-direction surfaces are the same between the permanent magnets on two sides in the circumferential direction. Between the first rotor and the second rotor, a magnetic flux flows along an axial direction while making a loop and passes through an armature.

Abstract: In one aspect, a three-phase axial flux stator is provided. The stator includes a plurality of stator modules oriented in an axial direction, and each of the stator modules includes a pair of teeth connected by a yoke section. The stator also includes a plurality of windings, each of the windings wound around one of the stator modules. The stator modules and the windings produce a three-phase flux in an axial direction.

Abstract: An electric machine (100) comprises a stator (112) and a rotor (114a, b) mounted for rotation about a rotor axis (120) with respect to the stator. Permanent magnets (124a, b) are carried by the rotor. The rotor has an output (190). The stator has coils (122) wound on stator bars (116) for interaction with the magnets. The rotor has two stages (114a,b) arranged one at either end of the stator bars, with two air gaps (126a,b) between the ends of the bars and the rotor stages. An annular housing (102, 142a, b, 146) retains and mounts the stator. A bearing (164a, b) is between the rotor and stator, the rotor being hollow around said rotor axis. There are two significant magnetic flux paths (30,30?) of the motor. The first passes between adjacent coils in a circuit on a substantially circumferential plane with respect to the axis (120). A second path 30? is in an axial plane, passing around the bearing.

Abstract: An electric machine (10) comprises a rotor (14a, b) having permanent magnets (24a, b) and a stator (12) having coils (22) wound on stator bars (16) for interaction with the magnets across an air gap (26a, b) defined between them. The bars (16) and coils (22) are enclosed by an annular stator housing (42a, b) that extends between the air gap. A chamber (52, 54, 56) is defined that incorporates cooling medium to cool the coils. The stator housing comprises two mating clamshells (42a, b) that mount the stator bars and coils in the machine. Each clamshell is molded from reinforced plastics and interconnected (optionally through one or more intermediate components).

Abstract: An electric motor (1) with permanent magnets includes a rotor (4), on which permanent magnets are fastened (6), and a stator (2). The stator includes a stator structure and coils (5) installed on the stator structure. The stator structure is realized by an assembly of at least three independent stator elements (21), assembled on a baseplate (3) with no direct mechanical linkage between them. Each stator element (21) is fastened onto the baseplate (3) of the motor by an adjusted fastener (31) and at least one anti-rotation element (32). Preferably, the stator elements (21) are made of a material that is a good heat conductor and electrical insulator, such as a ceramic.

Abstract: An electronic device includes a first structural part, a first electronic substrate correspondingly mounted on the first structural part, and a motor. The motor includes a second structural part and a second electronic substrate, a base directly formed on the second structural part, a rotor having at least one load, and a stator. The first and second structural parts are integrally made. The first and second structural parts are combined to a single electronic structural part. The stator has a plurality of winding coils and a driving circuit directly shaped on the second electronic substrate respectively for driving the rotor. The first and second electronic substrates are integrally made. The first and second electronic substrates are combined to a single electronic substrate. Alternatively, the driving circuit is directly shaped in the second electronic substrate.

Abstract: The present invention provides a direct-drive electric machine such as a generator and a motor comprising a rotor or a mover and a stator. The direct-drive electric machine is configured with a plural-module combination structure in which the rotor or the mover and the stator are mutually combined such that a plurality of modules form one phase, respectively.

Abstract: A coil unit and coil assembly for iron-less liar motor and the coil unit includes two vertical function sides and two axial non-function sides. The multiple units are alternatively connected to each other by inserting the vertical function side of one coil unit into the hollow portion of the adjacent coil unit so as to form a coil assembly. The width of the vertical function side is D1 and the distance between two respective insides of the two vertical function sides is D2. D2=m×D1+?L, wherein m representing the number of the vertical function sides of other coil units received in the vertical direction of the hollow portion. The ?L is the width of the gap which receives a separation plate between the two adjacent vertical function sides to increase the efficiency of dissipating heat or insulation when current passes through the coil assembly.

Abstract: A coreless permanent motor has a stator and a rotor rotatably mounted to the stator. One of the stator or the rotor has at least one winding disc (28). The other one of the stator or the rotor has at least one surface charged magnet disc (33). The winding disc (28) or the magnet disc (33) is formed by two or more sector shaped units that are mounted to two or more support members (27) respectively. The winding disc (28) or the magnet disc (33) is formed by closing the support member (27) and the closed support members (27) form a cylindrical housing. Thus, the structure of the coreless motor is simplified.

Abstract: Methods and apparatus for forming an electromechanical device are disclosed. In some embodiments, an electromechanical device includes a first substrate; a second substrate; a rotor movably disposed in the first and second substrates and having a plurality of first turbine blades disposed on a first side of the rotor and a plurality of permanent magnets disposed on a second side of the rotor, wherein the plurality of permanent magnets are arranged about a central axis of the rotor, wherein adjacent permanent magnets have opposing magnetic poles; a channel disposed between the first and second substrates and a peripheral edge of the rotor; a plurality of microballs disposed in the channel to provide a bearing for the rotor; a third substrate disposed proximate the second side of the rotor and having a plurality of coils disposed therein such that rotation of the rotor induces current the plurality of coils.

Abstract: Systems, methods, and apparatus for providing a homopolar generator charger with an integral rechargeable battery. A method is provided for converting rotational kinetic energy to electrical energy for charging one or more battery cells. The method can include rotating, by a shaft, a rotor in a magnetic flux field to generate current, wherein the rotor comprises an electrically conductive portion having an inner diameter conductive connection surface and an outer diameter conductive connection surface, and wherein a voltage potential is induced between the inner and outer diameter connection surfaces upon rotation in the magnetic flux field. The method can also include selectively coupling the generated current from the rotating rotor to terminals of the one or more battery cells.

Abstract: A motor includes a base, a rotor unit and a driving unit. The base has opposite first and second surfaces. The rotor unit includes a magnet unit disposed on a rotatable magnet carrier to face the first surface of the base. The driving unit includes a circuit board disposed between the base and the magnet unit, induction coils disposed on the circuit board and operatively associated with the magnet unit, a sensor unit disposed on the circuit board and spaced apart from the induction coils, and a rotor positioning component disposed on the second surface of the base and capable of magnet attraction with the magnet unit for positioning the rotor unit relative to the sensor unit when the rotor unit stops rotating.

Abstract: A motor includes a base, a rotor unit and a driving unit. The base has opposite first and second surfaces. The rotor unit includes a magnet unit disposed on a rotatable magnet carrier to face the first surface of the base. The driving unit includes induction coils disposed on a circuit board, a sensor unit that is disposed on the circuit board and spaced apart from the induction coils and that defines a first reference line with the rotation axis, and a rotor positioning component disposed on the second surface of the base, extending along a second reference line, and capable of magnet attraction with the magnet unit for positioning the rotor unit relative to the sensor unit when the rotor unit stops rotating.

Abstract: A swashplate system includes a rotating outer ring and a non-rotating inner ring, the rotating outer ring being adapted to carry a coil of wire and the non-rotating inner ring being adapted to carry a first and a second magnet. The first and second magnets create a magnetic field and an electrical current is created as the coil of wire passes through the magnetic field as the rotating outer ring rotates.

Abstract: An electric motor that generates mechanical energy whilst increasing both the motor efficiency and the mechanical power density. The electric motor includes: a plurality of disk surfaces having a main longitudinal axis; a plurality of stationary support structures; and a rotating shaft affixed to the disk surfaces. Each disk surface is coupled to an array of offset magnets. The magnets are arranged as matching magnetic pairs on two adjacent disk surfaces to create a plurality of magnetic fields between the matching magnetic pairs. The magnetic fields are titled at an angle A with respect to the main longitudinal axis. Each stationary support structure has an electromagnetic coil array located in-between each of the matching magnetic pairs, which provides an axial magnetic field when voltage is applied on the electromagnetic coil. Each of the electromagnetic coil array is titled at said angle A with respect to the main longitudinal axis.

Abstract: A method for assembling rotors which is applicable to a large axial gap type permanent magnet rotating machine is provided. A permanent magnet rotating machine comprising: a rotating shaft; at least two rotors comprising a table-like structure and permanent magnets attached thereto, the table-like structures being connected to the rotating shaft and being disposed in an axial direction of the rotating shaft; and a stator comprising a table-like structure and stator coils around which a copper wire is wound, said stator being disposed in a gap formed by the rotors so that the stator being separated from the rotating shaft, is manufactured by the following steps of: assembling the two rotors such that a predetermined gap is formed therebetween; and mounting the magnets on the table-like structures by inserting the magnet from the radially outer side of the table-like structures towards the center of the rotation with the assembled state being maintained.

Abstract: An axial flux electric machine and associated method of use that includes a shaft, a rotor attached to the shaft, a plurality of permanent magnets positioned underneath the rotor, an electrical winding positioned below the plurality of permanent magnets, a stator that encircles the shaft that is located below the rotor, a first bearing assembly located below the stator and encircling the shaft of the rotor, a second bearing assembly located below the first bearing assembly and encircling the shaft, and a spring mechanism, located between the first bearing assembly and the second bearing assembly, to distribute load placed on the shaft between the first bearing assembly and the second bearing assembly.

Abstract: A disk motor including: a rotor; a stator; at least one coil disk provided to one of the rotor and the stator; at least one magnet provided to the other of the rotor and the stator and facing a coil pattern of the coil disk; a current supply part for supplying current to the coil pattern; and an output shaft rotated by a rotating force of the rotor, wherein an insulating resin layer is provided between the coil pattern and the magnet.

Abstract: A disk motor and an electric power tool in which positioning of a coil disk with respect to a commutator disk can be carried out while reliably ensuring insulating properties are provided. A disk motor having: an output shaft part; a coil disk that is provided with a coil pattern and provided coaxially to the output shaft part; a commutator disk that is provided with a commutator pattern and provided coaxially to the output shaft part; and a positioning pin that is electrically insulated from the coil disk and the commutator disk, is engaged with the output shaft part and the coil disk, and carries out positioning of the coil disk with respect to the output shaft part, and an electric power tool having the disk motor are provided.

Abstract: A motor has an output shaft which is rotatably supported by a housing, a rotor which is fixed to the output shaft and which comprises a printed-wiring board, and a stator which is fixed to the housing and which comprises a magnet facing the rotor. The printed-wiring board comprises a coil/commutator disk and a coil disk. A commutator conductor pattern is formed in a commutator region of the coil/commutator disk. Likewise, coil conductor patterns are formed in respective coil regions of the coil/commutator disk and of the coil disk.

Abstract: An axial flux motor assembly (10) comprises a stack of first and second discs (20a, 20b) arranged alternately such that there is a gap allowing rotation between each disc (20a, 20b). The first disc (20a) is mounted on a rotatable shaft (40), while the second disc (20b) is fixed in position. The first and second discs (20a, 20b) each comprise sectors (200) of magnetic material arranged on a face of the disc (20a, 20b), between each of which sectors (200) is a radially-extending conductor (202) of a conductive path (201) for conducting electric current. The sectors (200) of magnetic material on the first and second discs (20a, 20b) are arranged at a constant angular pitch, but the pitch of the sectors of magnetic material on the first disc may or may not be the same as those on the second disc.

Abstract: Disclosed are a single rotor-type axial gap motor with low magnetic loss and high output, and a pump device using the axial gap motor. A first contact surface (231) is provided on the lateral surface in one circumferential direction of a yoke strip (23), and a second contact surface (232) is provided on the lateral surface in the other circumferential direction of the yoke strip (23), wherein the first contact surface (231) and the second contact surface (232) are aligned with each other. Defining As1 and As2 as the surface areas (As) of the first and second contact surfaces (231, 232), and Ap1 and Ap2 as the projected surface areas (Ap) of the lateral surfaces of the aforementioned yoke strip seen from the circumferential direction, it holds that As>Ap.

Abstract: A variable electrical generator (20) is operable to convert mechanical motion to electrical power. The generator (20) includes at least a stator element (60) and a rotor element (50) including coils (320) and magnets (90). The generator (20) includes a configuration of modules (80) including the coils (320) for generating wavelets (30) in response to the coils (320) interacting magnetically with the magnets (90), and a control arrangement (70) for combining the wavelets (30) for generating a composite synthesized power output (10) from the generator (20). A method of maintaining a variable generator (20) includes steps of: (a) determining operating status of modules (80) of the generator (20); (b) unplugging and replacing one or more defective modules (80) as identified in step (a).