Abstract: An axial flux motor includes a housing; a drive shaft disposed within the housing; at least one rotor; and at least one stator. The at least one rotor includes a diametrically-magnetized single pole pair magnetic ring having a rotor aperture defined through the center of the magnetic ring, where the drive shaft extends through the rotor aperture and where the at least one rotor is fixed to the drive shaft. The at least one stator includes a number of conductive windings and a stator aperture, where the drive shaft extends through the stator aperture and where the drive shaft is rotatable within the aperture. The at least one stator is configured to generate an axial magnetic field that causes the at least one rotor to rotate, thereby rotating the drive shaft.

Abstract: A system and method for generating rotation of a body includes a rotating body configured to rotate about a rotation axis, at least one permanent flanking magnet and a bias object (or material non-uniformity) both arranged at least partially on or within the rotating body, and a drive or ring element. An axial gap between the ring element and the rotating body exists in an axial direction parallel to the rotation axis. The ring element may be a ferrous body, permanent magnet or electromagnet, and the bias object may be made from one or more materials of magnetic states, such as magnetic, ferromagnetic, paramagnetic, and diamagnetic or be a change in material properties of the rotating body. In some embodiments, a center of the ring element is not aligned with the rotation axis.

Abstract: A tangential motor, a tangential motor rotor and a rotor iron core thereof. The rotor iron core includes a rotor body and permanent magnet slots provided on the rotor body, a rotor magnetic pole between two adjacent permanent magnet slots being provided with a fixing hole for fixing a rotor punched segment and a flux isolating hole; the flux isolating hole is located at an outer side of the fixing hole in a radial direction of the rotor body, a width of the flux isolating hole (12) smoothly increases in a direction from the outer side of the rotor body to a center of a circle thereof. The rotor iron core reduces vibration noise of the motor, and improves efficiency of the motor.

Abstract: Embodiments of the disclosure provide an axial flux motor and an electrical product. The motor includes a rotor which rotates with a central axis as a center, and a stator which is disposed opposite to the rotor in an axial direction and has a plurality of stator units, the plurality of stator units being disposed around the central axis. The stator unit includes a core unit formed by a core piece, and a coil unit formed by a wire wound and disposed around the core unit. A height of the core unit in the axial direction is less than or equal to a height of the coil unit in the axial direction. With the embodiments of the disclosure, the dependency between the coil and the core in design and manufacture can be reduced, and the degree of design freedom can be improved.

Abstract: A permanent-magnet synchronous motor or generator with at least one rotor (2) and at least one stator (3, 8). The motor includes two rotors (2), four stators (3, 8) and a cooling system (7, 7a). The cooling system includes three cooling circuits (7, 7a), i.e. two outer circuits (7) which are each accommodated in a longitudinal outer wall of a casing (8), adjacent to an outermost stator (3, 8), for cooling said outermost stator (3, 8), and an intermediate circuit (7a) located between the two innermost stators (3, 8) in the motor for simultaneously cooling said two stators (3, 8), the central shaft (5) being common to the two rotors (2) which are connected to the central shaft (5) by mechanical means.

Abstract: An axial field rotary energy device can include a housing having an axis. A stator assembly is mounted to the housing and has stator panels that are axially-stacked and discrete panels from each other. Each stator panel includes a respective printed circuit board (PCB) having respective coils that are electrically conductive and interconnected within the respective PCB. In addition, a rotor assembly including rotors is rotatably mounted within the housing on opposite axial ends of the stator assembly. The rotors can be mechanically coupled together. Each rotor can include magnets having leading and trailing edges. The trailing edge of one magnet and the leading edge of an adjacent magnet can be parallel to each other to define a consistent circumferential spacing, relative to the axis, between adjacent ones of the magnets.

Abstract: An electric machine including a casing comprising a base wall, a stator integral with the casing and provided with a plurality of coils constituting a stator winding, a thermally conductive and electrically insulating annular heat sink interposed between the stator and the base wall of the casing; the annular heat sink is abutted against the base wall and the coils are abutted against the annular heat sink which defines a stop for the stator.

Abstract: The purpose of the present invention is to ensure reliability and installation space reduction of crossover wires of an axial gap type rotary electric machine. An axial gap type rotary electric machine having: a stator which is constructed by annularly arranging multiple core units about an axis of rotation, each of the core units having at least a core, windings disposed around the outer periphery of the core, and crossover wires leading out from the windings; at least one rotor which faces an axial end surface of the cores with a gap therebetween; and a rotary shaft which rotates along with the rotor.

Abstract: The invention relates to a wind turbine with a generator and a method of assembling a generator thereof, wherein the generator comprises a rotor rotatably arranged relative to a stator. The rotor comprises a plurality of superconducting pole units arranged on a back iron which is spaced apart from a rotor structure by a number of thermally insulating plates or beams. Said plates or beams are located between either ends of the rotor and orientated relative to the rotational direction of the rotor. Each plate has a first end firmly connected to another first beam extending in an axial direction and a second end firmly connected to another second beam also extending the axial direction. The first beams are further firmly connected to the back iron while the second beams are further firmly connected to the rotor structure. The thermally insulating plates or beams provide a flexible and cheap support interface that is able to adapt to the tolerances of the individual components.

Abstract: An electric motor includes a stator, and a rotor spaced apart from the stator by a gap. The rotor includes a first magnet that generates first magnetic flux, that includes first magnetic portions arranged in a circumferential direction of the rotor, and that are configured to generate a magnetic field in the gap, and second magnetic portions that are alternately arranged with the plurality of first magnetic portions along the circumferential direction of the rotor. The rotor further includes a plurality of second magnets that are each located between a first magnetic portion of the first magnetic portions and a second magnetic portion of the second magnetic portions that is adjacent to the first magnetic portion, where each second magnet generates second magnetic flux that is greater than the first magnetic flux, and the first magnet is located radially between the gap and the plurality of second magnets.

Abstract: A segment plate for a stator lamination assembly of a generator of a wind turbine, and a base plate in the form of a ring segment, wherein the segment plate has a first radial portion in which recesses are provided for receiving a stator winding and radially adjacent to the first radial portion a second radial portion forming a segment of a magnetic yoke of the generator. In particular adjacent to the second radial portion the segment plate has a third radial portion forming a segment of a stator carrier structure of the generator and which in particular is adapted in conjunction with the third radial portions of further segment plates to form the stator carrier structure of the generator. A stator lamination assembly, a generator and a wind turbine, each having such segment plates.

Abstract: A magnetic rotor including: a support structure with a rotational axis, with a front side having a first annular region encircling the rotational axis, and with a back side having a second annular region encircling the rotational axis, the support structure having a first array of pockets formed in the front side within the first annular region and encircling the rotational axis, and a second array of pockets formed in the back side within the second annular region and encircling the rotational axis, and wherein the pockets of the first array of pockets are interleaved with the pockets of the second array of pockets; a first plurality of magnets contained within the pockets of the first array of pockets on the first side of the support structure; and a second plurality of magnets contained within the pockets of the second array of pockets on the second side of the support structure, wherein the pockets of the first and second arrays of pockets have obstructions against which the magnets contained within the p

Abstract: A variable inductor direction sensor may include a rotatable body having a first circumferential tooth array and a stationary body having a second circumferential tooth array. The second circumferential tooth array may be concentric with the first circumferential tooth array. The rotatable body may be disposed relative to the stationary body such that one of the first circumferential tooth array and the second circumferential tooth array circumscribes the other of the first circumferential tooth array and the second circumferential tooth array. Further, at least one of the first circumferential tooth array and the second circumferential tooth array has a non-uniform circumferential geometry.

Abstract: An axial flux magnetic geared machine includes a high speed magnetic rotor and a low speed magnetic rotor maintained in a spaced relationship from the high speed magnetic rotor. A modulating structure is disposed between the high speed magnetic rotor and the low speed magnetic rotor. A stator is disposed in a radially central bore of one or more of the high speed magnetic rotor, the low speed magnetic rotor, and the modulating structure.

Abstract: An external rotor motor, including: a front end cover; a rear end cover; a sleeve casing; a rotary shaft; a stator assembly; and an external rotor assembly. The front end cover includes a first bearing chamber in which a front bearing is disposed. The front end cover and the rear end cover are disposed at two ends of the sleeve casing, respectively. The external rotor assembly is disposed on and integrated with the rotary shaft. The rear end cover includes a cover body and a sleeve base. The sleeve base includes a second bearing chamber in which a rear bearing is disposed. The external rotor assembly is disposed in the sleeve casing and sleeves the stator assembly. The rotary shaft includes a head, a middle part, and a tail. The tail of the rotary shaft is supported by the rear bearing on the rear end cover.

Abstract: A generator is provided with stator coils fixed with an outer fixing bracket and rotors driven by a spindle, and the rotors are fixed with the spindle, and both of stator coils and a rotor frame are of disk shapes with the spindle passing through centers therein; one rotor and an adjacent stator coil constitute one kinetic energy conversion unit, a plurality of kinetic energy conversion units are axially aligned through the spindle and successively mounted in a consistent direction to form a laminated generator body; permanent magnets configured in even number and having consistent shapes on a single rotor frame are distributed in a form of regular polygon around an axis, the shape of a single coil is the same as that of the magnet.

Abstract: In one embodiment, a hybrid aircraft includes a fixed-wing propulsion system and a multirotor propulsion system. The multirotor propulsion system includes a propeller coupled to a motor shaft. A motor drives the propeller via the motor shaft. The hybrid aircraft further includes a magnetic orientation detent to prevent the propeller of the multirotor propulsion system from rotating when power to the multirotor propulsion system is removed. The magnetic orientation detent further includes a plurality of magnets coupled to the circumference of the motor shaft and a detent magnet magnetically coupled to the plurality of magnets.

Abstract: [Problem] To provide a high-efficiency stepping motor in which a magnetic force of an exciting coil is made to effectively contribute to a rotating operation of a rotator. [Solution] The present stepping motor (50) uses permanent magnets (22) having inside a substantially cylindrical inner peripheral surface, and is disposed with a substantially columnar exciting coil (26) inside the inner peripheral surface. Moreover, turning on/off of current application to the exciting coil (26) and the application direction are switched when the permanent magnet (22) and the exciting coil (26) have reached a specific position. Repulsion and attraction that act on both ends of the exciting coil (26) can thereby be made to contribute to a rotary motion of the stepping motor (50). Therefore, the stepping motor (50) can obtain a high conversion efficiency.

Abstract: An electric generator for windmill installations has a simple and efficient design, including a stator having a coil, a rotor having a base, a lid, and magnets. Rotor magnets are arranged on the lid and base along an annular line with a predetermined gap, and the coil, fixed by ring-shaped plates on both sides thereof, is mounted between the magnets with a minimal gap. The gap between the ring-shaped plates and the magnets is filled up with magnetic liquid. The coil is formed of three windings, located in radial grooves of a matrix, including outer and inner parts. The ring-shaped plates and matrix are made of dielectric non-magnetic material, the base and lid are made of magnetic-flux conductive material. The poles of adjacent magnets on the base and lid have opposite polarities. The poles of magnets mounted on the base face the magnets mounted on the lid with opposite polarities.

Abstract: A rotating machine is provided, including a rotor and a stator set. The rotor rotates around an axis, wherein the rotor includes a first permanent magnet set and a second permanent magnet set, the first permanent magnet set is magnetized in a circumference direction of the axis, and the second permanent magnet set is magnetized in an axial direction of the axis. The stator set corresponds to the rotor, wherein the stator set includes a radial stator member and an axial stator member, the axial stator member corresponds to the rotor in the axial direction of the axis, and the radial stator member corresponds to the rotor in a radial direction of the axis.

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: An axial gap type rotating electric machine, having a stator with first tooth parts protruding in an axial direction and formed in a concentric arc-like manner, and a rotor with magnetic poles arranged in a distributed manner in the circumferential direction, and the magnetic poles include second tooth parts that protrude in the axial direction and are formed in a concentric arc-like manner, the second tooth parts being opposedly arranged so as to respectively engage with the first tooth parts with the intermediation of the air gap. The rotor is incorporated in the rotating member so as to be movable in the axial direction and so as not to be rotatable with respect to the rotating member. The rotating electric machine further includes an urging device that makes the air gap between the rotor and the stator adjustable.

Abstract: The invention relates to commutatorless, brushless DC machine with stationary armature and method of operating the same. The armature system is so deployed within magnetic flux producing arrangement having closed path for flux through magnetic substance except air gaps, that the two coil sides of an armature coil are facing like poles of two different magnetic field systems 1 and 2. During DC generator operation magnetic field systems are rotated or moved linearly in same direction with respect to stationary armature such that DC emf in each coil is sum of emfs of all insulated conductor which are alternatingly facing magnetic fields 1 and 2. During DC motor operation rotatable torque or linear force is generated by armature coil conductors carrying direct current on magnetic field systems 1 and 2, causing the rotation or linear movement of the above said two magnetic field systems in same direction.

Abstract: Apparatus and method for tuning the magnetic field of windmill generators to obtain efficient operation over a broad RPM range. The windmill generator includes fixed windings (or stator) inside a rotating rotor carrying permanent magnets. The permanent magnets are generally cylindrical and have North and South poles formed longitudinally in the magnets. Magnetically conducting circuits are formed by the magnets residing in magnetic conducting pole pieces (for example, low carbon or soft steel, and/or laminated insulated layers, of non-magnetizable material). Rotating the permanent magnets, or rotating non-magnetically conducting shunting pieces, inside the pole pieces, either strengthens or weakens the resulting magnetic field to adjust the windmill generators for low RPM torque or for efficient high RPM efficiency. Varying the rotor magnetic field adjusts the voltage output of the windmill generators allowing the windmill generator to maintain a fixed voltage output.

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 various embodiments, a motor may be provided. The motor may include a base, a first rotor, a second rotor and a stator arranged between the first rotor and the second rotor, the stator including an alignment member for aligning the stator to the base.

Abstract: An axial gap rotating electric machine includes a pair of rotors fixed to a rotating shaft, a stator, a holding member holding the stator, and a housing. The stator includes cores arranged in a circumferential direction of the rotating shaft, and coils wound around the cores. The holding member and the housing are conductive. The holding member includes an outer peripheral portion firmly fixed on an inner wall of the housing, and a protruding portion protruding from the outer peripheral portion toward the rotating shaft. The protruding portion includes a plurality of protruding portions in the circumferential direction of the rotating shaft. The core is held by a pair of the protruding portions adjacent in the circumferential direction of the rotating shaft, and a gap to interrupt a path of eddy currents between distal ends of the pair of the protruding portions is provided between the distal ends.

Abstract: The invention relates to the field of electrical engineering, specifically to low-speed electrical generators, and can be used in particular in wind energy installations.

Abstract: A motor-generator utilizes a multi-part rotor encircling a stator, the rotor including a plurality of rotor segments.

Abstract: An electrical machine includes a rotor comprising a rotor core and a plurality of permanent magnets embedded radially within the rotor core to form a plurality of rotor poles. The electrical machine further includes a stator comprising a stator core disposed concentrically outside the rotor and including a plurality of stator teeth defining a plurality of stator slots there between. An arithmetic sum or difference of twice the number of stator teeth and the number of the stator poles equals the number of rotor poles.

Abstract: The invention relates to the field of electrical engineering, specifically to low-speed electrical generators, and can be used in particular in wind energy installations. In the proposed electromagnetic generator the rotor is equipped with permanent magnets (3, 4) and the stator comprises two parallel plates (5, 6), between which annular windings (7) are arranged. The rotor is formed from two parallel discs (1, 2) fixed to a shaft (10), with circular rows of said permanent magnets arranged on each of said parallel discs on surfaces facing one another, the polarity of said permanent magnets in each row alternating, while the poles of the permanent magnets in one row are turned towards the opposite poles of the permanent magnets in the other row. The annular windings (7) of the stator are inserted in pairs one inside the other and are in the form of isosceles trapeziums, the lateral sides (8, 9) of which are arranged radially relative to the axis (10) of rotation of the rotor.

Abstract: A first bias magnetic flux may be communicated between a first axial pole and a first axial facing surface of the body. A second bias magnetic flux may be communicated between a second axial pole and a second axial facing surface of the body. A time-varying axial control magnetic flux may be communicated through the first and second axial facing surfaces of the body, and may be generated in a magnetic circuit including the body, the first and second axial poles, and an axial magnetic backiron. The first and second axial poles may include axial pole laminated inserts composed of electrically isolated steel laminations stacked along the body axis. The axial magnetic backiron may include laminated inserts composed of electrically isolated steel laminations stacked in the direction tangential to the body axis. The axial pole laminated inserts may be magnetically coupled to the axial magnetic backiron laminated inserts.

Abstract: A synchronous multipolar brushless machine includes an immobile stator armature and field windings, which are placed concentrically around a shaft and radially inwardly positioned relative to the stator armature, on a power unit carrying disc, so that the field windings and armature windings form a mechanically connected unit which generates an excitation magnetic field, and in which an alternate voltage is generated. The excitation magnetic field is transferred to a rotor via labyrinth shaped first and second air gaps. A multipolar rotating magnetic field is generated around the stator armature while the synchronous machine is operated, thereby magnetizing the rotor. In order to reduce magnetic flux resistance, a ferromagnetic tolerance ring is inserted in each first and second air gap. Alternatively, a ferrofluid is provided in each first and second air gap, which significantly increases the magnetic conductivity.

Abstract: An axial rotary energy device including a segmented stator assembly having a plurality of segments arranged in an annular array. Each stator segment is constructed by stacking a plurality of PCB power conductor layers and a plurality of PCB series layers. Each layer having radial conductors extending from an inner via to an outer via. The vias electrically connect selected radial conductors of the series conductor layer and power conductor layer. Each power conductor layer includes a pair of positive and negative terminal vias for one phase of the electric current connected to selected outer vias. A daughter PCB layer electrically connects two adjacent segments together by having a first portion electrically connected to a negative terminal via located in one segment and a second portion electrically connected to a positive terminal via located in an adjacent segment together with a current conductor electrically connecting the two terminal vias together.

Abstract: This motor/generator produces rotational torque and/or electrical energy employing a flexible magnetically permeable circular band as a rotor that in operation is in physical contact with the stator, arching and curving forward in response to advancing magnetic fields along the stator surface. The stator may be comprised of either a typical three-phase winding, or a series of magnetic actuators arranged in a toroid for which the rotor band acts as a continuous armature. The rotor rotates as follows: an actuator to the left or right of an active actuator is activated to pull a rotor arch down to the stator surface; as this occurs, the previously active actuator is turned off and that part of the rotor springs away; the rotor moves clockwise or counterclockwise as the arches of the rotor are advanced forward or backward, respectively. Differential rotor movement provides speed reduction and torque enhancement without gears.

Abstract: The N1(s) turns of a first output winding is divided by a split ratio ? into N1a(s) turns of a lower-layer first output winding and N1b(s) of an upper-layer first output winding. The lower-layer first output winding is continuously wound around all slots as the undermost layer. A second output winding is continuously wound around all slots over the lower-layer first output winding. An upper-layer first output winding is continuously wound around all slots over the second output winding. The split ratio ? is adjusted only in the slots where the detection accuracy decreases. This equalize the contribution of the first output windings and the second output winding to the flux linkage, thereby achieving high angle detection accuracy.

Abstract: An axial rotary energy device including a segmented stator assembly having a plurality of segments arranged in an annular array. Each stator segment is constructed by stacking a plurality of PCB power conductor layers and a plurality of PCB series layers. Each layer having radial conductors extending from an inner via to an outer via. The vias electrically connect selected radial conductors of the series conductor layer and power conductor layer. Each power conductor layer includes a pair of positive and negative terminal vias for one phase of the electric current connected to selected outer vias. A daughter PCB layer electrically connects two adjacent segments together by having a first portion electrically connected to a negative terminal via located in one segment and a second portion electrically connected to a positive terminal via located in an adjacent segment together with a current conductor electrically connecting the two terminal vias together.

Abstract: The N1(s) turns of an output winding is divided by a split ratio ? into N1a(s) turns of an output winding (1a) and N1b(s) turns of an output winding (1b). The output winding (1a) is continuously wound around all slots as the undermost layer. Output winding 2, which is different in phase by 90 degrees from the output winding (1a), is continuously wound around all the slots over the output winding (1a). An output winding (1b) is continuously wound around all the slots over output winding 2. This equalizes the contribution of the output winding and output winding 2 to the flux linkage, thereby achieving high angle detection accuracy.

Abstract: A generator comprises: a stator plate having a first fixed permanent magnet including a plurality of magnets on one side and a second fixed permanent magnet including a plurality of magnets on the other side; a first armature having a first switching winding, a first output winding, and a first back-electromotive force prevention winding on a fixed first ring core; a second armature having a second switching winding, a second output winding, and a second back-electromotive force prevention winding on a fixed second ring core; a first rotor plate having a first rotary permanent magnet; and a second rotor plate having a second rotary permanent magnet. The first and second rotor plates are coupled to each other by a driving shaft.

Abstract: A power generating structure comprises a front magnetic disc, a rear magnetic disc, and a coil disc disposed between the front and the rear magnetic discs. The coil disc is provided with a plurality of coil units radially arranged. Each coil unit includes a plurality of coils each with different turns of insulated wire. The front and the rear magnetic discs are respectively provided with a plurality of magnetic elements radially arranged. The coil disc is fixed to a shaft at a center thereof. The shaft extends outwardly from the rear magnetic disc. A plurality of blades can be attached to a periphery of the front or the rear magnetic disc. Therefore, the blades can be driven to rotate the front and the rear magnetic discs to have the coils of coil units continuously induced different voltages by the magnetic elements to supply various equipment.

Abstract: The invention relates to an electric disk-armature motor including at least one stator in the form of a disk, at least one rotor in the form of an armature disk which is mounted rotatably about an axis of rotation with respect to the stator and/or a motor housing. The rotor and the stator are oriented parallel to one another and are spaced apart from one another by a gap. An end side of the rotor, which end side faces the stator, has a multiplicity of permanent magnets polarized in the axial direction, which are arranged in the form of a ring around the axis of rotation. A north pole and a south pole faces the stator alternately in the tangential direction, and wherein the stator (11) has a multiplicity of coil elements. The invention also relates to an electric bicycle or pedelec comprising such a disk-armature motor.

Abstract: An electric motor features liquid cooling capability. A rotor and a secondary rotor are coupled to a shaft for rotation therewith. The rotor comprises a first annular member and magnets secured to the first annular member. The secondary rotor comprises a second annular member and secondary magnets secured to the second annular member. A stator is spaced axially apart from the rotor and the secondary rotor. The stator comprises a plurality of generally planar windings secured to a magnetic core and a secondary planar windings secured to a secondary magnetic core. The magnetic core has at least one cooling channel.

Abstract: An end cover adapted to engage with an end surface of a spindle of a motor rotor is proposed for securely coupling to the spindle with a plurality of permanent magnets disposed around the peripheral wall of the spindle. The end cover has a first surface facing an end surface of the spindle and an second surface opposing to the first surface, which is formed with a plurality of inserting slots indentedly disposed around the rim thereof and corresponding to the permanent magnets for coupling the ends of the permanent magnets, thereby securely fastening each of the permanent magnets to the spindle of the motor rotor. Further, the present invention further provides a motor rotor having the end covers described above.

Abstract: A motor includes a first rotor and a second rotor which are disposed at opposite sides of a stator, and each of the first rotor and the second rotor includes a plurality of modules, each including a pair of permanent magnets and a connection unit which connects ends of the permanent magnets.

Abstract: The brushless electric machine includes a first drive member (30U) having a plurality of permanent magnets (32U); a second drive member (10) having a plurality of electromagnetic coils and capable of movement relative to the first drive member (30U); and a third drive member (30L) disposed at the opposite side from the first drive member (30U) with the second drive member (10) therebetween. The second drive member (10) has magnetic sensors (40A, 40B) for detecting the relative position of the first and second drive members. The third drive member (30L) has at locations facing the permanent magnets of the first drive member (30U) a plurality of magnetic field strengthening members (32L) for strengthening the magnetic field at the location of the second drive member (10) in conjunction with the permanent magnets.

Abstract: Provided are a stator for an aspiration motor, an aspiration motor and an in-car sensor using the same, in which a bobbin is integrally formed with a stator, to thus use an inexpensive insulation wire and enhance a productivity and lower an inferiority using an insert-molding technology. The stator for the aspiration motor includes a stator support plate, a support boss which is vertically extended from the central portion of the stator support plate, a bobbin which is bent and formed on the lateral surface of the support boss, and which is separated from the upper side surface of the stator support plate, to thereby provide a space, and a stator coil which is formed by making a wire wound in the space provided by the bobbin.

Abstract: A brushless motor has a 2P3S×n structure, in which a ratio (W) of a circumferential width (Wm) of each of magnets to a length (Wp) of a chord formed between endpoints of an arc with a center angle ?p=360°/pole-number 3n, the arc being included in an inner-diameter circle C2 of each of the magnets, is in a range of 0.76<W=Wm/Wp<0.86. Therefore, in the brushless motor of the 2P3S×n structure, a skew angle may be set in a range of 36°??skew?57° in terms of electrical angle, while a content ratio of a fifth harmonic component contained in an induced voltage of the brushless motor may be set in a range of 4.5% to 6.5% with respect to a fundamental wave.

Abstract: To provide a technique that improves an efficiency of using a magnetic field in a brushless electric machine. A brushless electric machine includes a first member having N sets (N is an integer of 2 or more) of electromagnetic groups, and a second member that has N+1 sets of magnetic field forming member groups and can move in a predetermined moving direction in relative to the first member. One set of the electromagnetic coil group and one set of the magnetic field forming member group are alternately disposed along a direction perpendicular to the moving direction.

Abstract: An axial flux permanent magnet brushless machine according to the present invention includes: a housing; a stator comprising a stator core and a coil; two rotors each including a permanent magnet, and positioned so as to sandwich the stator in the axial direction with air gaps being left between the rotors and the stator; and a variable gap mechanism for changing distances of the air gaps; wherein the variable gap mechanism operates from a power source that supplies other rotational power than a rotational power of the axial flux permanent magnet brushless machine, and changes the distances of the air gaps by shifting the rotors in the axial direction.

Abstract: The invention is to provide an axial gap type rotating apparatus for enabling downsizing and high output by causing the magnetic field to pass across the coils effectively in arranging the magnets and coils to oppose one another in the axial direction of the rotor shaft, in which in arranging pluralities of segment magnets and segment coils radially to oppose one another in the circumferential direction of the rotor shaft, each segment coil is comprised of an air-core coil having a non-winding portion in the center, a segment yoke piece of soft magnetic material is provided in the non-winding portion while being in non-contact with the winding, and the segment yoke pieces are arranged discontinuously in a separate state for each of non-winding portions of a plurality of segment coils.