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1334results about How to "Reduce Flux Leakage" patented technology
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Non-contact magnetically adsorbed wall climbing robot
The present invention is non-contact magnetically adsorbed wall climbing robot, belongs to the field of robot design technology, and aims at providing robot with both high moving flexibility and great loading capacity. The non-contact magnetically adsorbed wall climbing robot includes wheeled moving mechanism and permanent adsorption mechanism. The wheeled moving mechanism includes chassis, driving mechanism and wheels, which are laid symmetrically, driven in differential mode, and turns on wall by means of the speed difference of the wheels. The permanent adsorption mechanism has no contact with the magnetically conducting wall surface, high magnetic energy utilization, and high adsorption capacity. The wall climbing robot has high loading capacity, high motion flexibility, especially high turning flexibility, and excellent application foreground.
Owner:TSINGHUA UNIV
Radio Frequency Device with Magnetic Element, Method for Making Such a Magnetic Element
InactiveUS20080297292A1Easy to controlAdjustable angleNanomagnetismVacuum evaporation coatingRadio frequencyPhysics
Owner:STMICROELECTRONICS SRL +1
Structure of inductance core and wire frame
ActiveUS7061358B1Increase coverageLessen inductance leakageTransformers/inductances coils/windings/connectionsCoilsBobbinEngineering
An improved structure of inductance core and wire frame mainly provides a center post at the center portion of the core. A containing circumferential channel is also provided at the periphery of the center post to make the outer circumference of the containing circumferential channel form a surrounded circumferential side wall that has small area of indentation openings at the end corners only. A center hole is also provided at the center portion of the wire frame that accommodates the center post, and a bobbin for the winding of the coil is further provided at the outer circumference of the center hole. A salient lead-out seat is provided at the end corner of the wire frame, and brazing posts are also provided on the same side at the upper edge of each of the lead-out seat to connect to the drawing head of the coil. By the use of the center post of the core embedding into the center hole of the wire frame, as well as making use of the containing circumferential channel to contain the wire frame, each of the lead-out seat of the wire frame can stretch out through the openings of the core. The magnetic leakage can be lessened and the inductance efficiency can be improved by making use of the circumferential side wall to form an integral surrounded covering.
Owner:YANG SEN TAI
Pointing device
InactiveUS6952197B1Reduce assembly heightReduce the overall heightManual control with multiple controlled membersCathode-ray tube indicatorsTransducerEngineering
A pointing device including a base part, an operating part supported on the base part in a rockable manner about a fulcrum, a magnet carried on the operating part, a magneto-electro transducer carried on the base part, and an elastic member arranged between the base part and the operating part to elastically push the operating part toward an initial balanced position on the base part. The elastic member is formed as a plate spring provided with a first section engageable with the base part and a second section engageable with the operating part. The second section is integrally joined to the first section and located to extend around the fulcrum. The first section of the plate spring extends annularly around the fulcrum and is fixedly supported on the base part, and the second section extends arcuately along the first section to exert a spring action.
Owner:FUJITSU COMPONENENT LTD
Rotary electrical machine
ActiveUS20110109190A1Reduce magnetic flux leakageSpacing intervalMagnetic circuit stationary partsSynchronous machines with stationary armatures and rotating magnetsMagnetic fluxHigh torque
When a conventional technology is employed, it is difficult to manufacture a magnet row because magnets are disposed so that N-poles face each other while S-poles face each other. Further, magnetic reluctance is increased because a generated magnetic flux obliquely crosses an air gap in which the magnets are disposed. Furthermore, the conventional technology is at a disadvantage in that magnetic flux interference occurs between neighboring magnetic poles. The present invention has been made to address the above problems and provide a rotary electrical machine capable of generating high torque at low speed. The rotary electrical machine includes a rotor disc and an armature. The rotor disc is configured so that plural rectangular magnets whose longitudinal direction crosses the direction of rotor disc rotation are disposed on the rotor disc, and that the polarities of neighboring magnets differ from each other. The armature is configured so that plural armature cores are disposed to sandwich the magnets, which are mounted on the rotor disc and provided with a particular magnetic pole, and that a winding is commonly wound between the armature cores.
Owner:HITACHI LTD +1
Two magnetic route structure of large-stroke electromagnetic vibration
ActiveCN101069884AUniform magnetic fieldReduce Flux LeakageMechanical vibrations separationCoaxial lineNuclear magnetic resonance
The present invention relates to a double magnetic path structure of large-stroke electromagnetic vibration table. Said double magnetic path structure includes coaxially successively-connected first magnetic body, first central magnetic ring, central magnetic pole, second central magnetic ring and second magnetic body. Said first magnetic body and second magnetic body are respectively fixed in the outer shell interior, a cylindrical coil and an outer magnetic pole are coaxially cover-mounted on the exterior of central magnetic pole, and two ends of said outer magnetic pole are fastened with outer shell end port. Said invention also provides the working principle said double magnetic path structure and its concrete operation method.
Owner:ZHEJIANG UNIV
Rotor-stator structure for electrodynamic machines
ActiveUS7061152B2Lower the volumeReduce materialSynchronous machines with stationary armatures and rotating magnetsManufacturing cost reductionPath length
A rotor-stator structure for electrodynamic machinery is disclosed to, among other things, minimize magnetic flux path lengths and to eliminate back-iron for increasing torque and / or efficiency per unit size (or unit weight) and for reducing manufacturing costs. In one embodiment, an exemplary rotor-stator structure can comprise a shaft defining an axis of rotation, and a rotor on which at least two substantially conical magnets are mounted on the shaft. The magnets include conical magnetic surfaces facing each other and confronting air gaps. In some embodiments, substantially straight field pole members can be arranged coaxially and have flux interaction surfaces formed at both ends of those field poles. Those surfaces are located adjacent to the confronting conical magnetic surfaces to define functioning air gaps. Current in coils wound on the field poles provide selectable magnetic fields that interact with magnet flux in flux interaction regions to provide torque to the shaft.
Owner:REGAL BELOIT AMERICA
Perpendicular shield pole writer with tapered main pole and tapered non-magnetic top shaping layer
ActiveUS20090116145A1Reduce the amount requiredReduce Flux LeakageManufacture head surfaceRecord information storageEngineeringNon magnetic
A PMR writer with a tapered main pole layer and tapered non-magnetic top-shaping layer is disclosed that minimizes trailing shield saturation. A second non-magnetic top shaping layer may be employed to reduce the effective TH size while the bulk of the trailing shield is thicker to allow a larger process window for back end processing. A sloped surface with one end at the ABS and a second end 0.05 to 0.3 microns from the ABS is formed at a 10 to 80 degree angle to the ABS and includes a sloped surface on the upper portion of the main pole layer and on the non-magnetic top shaping layer. An end is formed on the second non-magnetic top shaping layer at the second end of the sloped surface followed by forming a conformal write gap layer and then depositing the trailing shield on the write gap layer and along the ABS.
Owner:HEADWAY TECH INC
Contact-less power and signal transmission device for a high power level transformer
InactiveUS20100148505A1Guaranteed signal transmission efficiencyIncrease speedTransformersTransformers/inductances detailsTransformerEngineering
A transformer is provided comprising a first member upon which a first circuit is wound; a second member upon which a second circuit is wound such that power is transferred to the second circuit in a contact-less manner; and a signal transmitter on the first member in close proximity to an appropriate receiver on the second member together with a signal transmitter on the second member in close proximity to an appropriate receiver on the first member such that said transmitters and receivers exchange signals in a contact-less manner, whereby the circuits are embedded in a high thermal conductivity resin. An exemplary embodiment of the invented transformer is one where the second member rotates relative to the first member.
Owner:DUNLAP GREGORY M +4
Magnetic fluid sealing structure
InactiveCN102518811AReduce Flux LeakageIncrease the magnetic field strengthEngine sealsMagnetic liquidsJoint surface
The invention relates to a magnetic fluid sealing structure, belongs to the technical field of mechanical engineering sealing and solves the problem how to improve the pressure resistance capability of magnetic fluid sealing. The magnetic fluid sealing structure comprises a small end cover (5), a concentrating flux sleeve (1), an outer sleeve (8), a first magnetism isolating ring (9), first and second O-shaped sealing rings (11, 14), a second magnetism isolating ring (16), first and second bearings (6, 17), an adjusting washer (20), first and second pole shoes (10, 15), magnetic fluid (2), a permanent magnet (13) and a big end cover (19). In the magnetic fluid sealing structure, magnetic lubricating grease is respectively coated on the joint surface of the first pole shoe (11) and the permanent magnet (13) and on the joint surface of the second pole shoe (15) and the permanent magnet (13). The first magnetism isolating ring (9) and the second magnetism isolating ring (16) have the same structure and size and have thicknesses h of 2 to 10mm. Due to the selection of the widths l of the first and second magnetism isolating rings, the axial distances g of bearings and the pole shoes, which are positioned at both ends of the first and second magnetism isolating rings, are greater than or equal to 5mm and less than 15mm.
Owner:BEIJING JIAOTONG UNIV
AC permanent magnet synergistic reluctance motor
ActiveCN103560633AIncrease magnetic intensityImprove reaction speedMagnetic circuit rotating partsMagnetic circuit stationary partsExcitation currentReluctance motor
The invention relates to an AC permanent magnet synergistic reluctance motor. The motor is characterized in that permanent magnets or permanent magnet components are combined with laminated cores in stator excitation salient pole pairs; when excitation coils do not have excitation current, the permanent magnets or the permanent magnet components and the laminated cores in the excitation salient pole pairs form locally closed magnetic circuits; when the excitation coils have the excitation current, the original closed permanent magnet magnetic circuits are opened and converged on the excitation magnetic circuits of the excitation salient pole pairs, and then compound excitation magnetic potential is produced on the two port surfaces of each salient pole of each excitation salient pole pair; when the magnetic port surfaces of the permanent magnets fixed to a rotor support are just opposite or coincide with the port surfaces of the stator excitation salient pole pairs, the shortest closed magnetic circuit with air gaps is formed. According to the AC permanent magnet synergistic reluctance motor, the magnetic induction intensity in the air gaps of the motor is greatly increased, the torque at the time of low rotation speed is increased, common magnetic circuit interference and flux leakage are reduced, electric energy is saved, and the power density of the motor and the use rate of equipment are further enhanced.
Owner:戴珊珊
Self-shielded electronic components
InactiveUS20070069717A1Reduce energy lossMagnetic couplingElectronic circuit testingAmplifier with semiconductor-devices/discharge-tubesElectrical conductorElectronic component
An electronic component including at least one first conductor for operating at a first voltage applied thereto and at least one second conductor for operating at a second voltage applied thereto. The second voltage is smaller than the first voltage and at least a portion of the second conductor is located on at least one side of the first conductor whereby the second conductor acts as a shield to substantially inhibit at least one of magnetic and electric field from passing from the first conductor to a surrounding medium.
Owner:CHEUNG TAK SHUN +1
Double-disk type magnetorheological clutch
InactiveCN102080692ASpeed up the flowIncrease the magnetic field strengthFluid clutchesRing deviceDrive shaft
The invention relates to a double-disk type magnetorheological clutch which comprises a driving disk, a driven disk, a magnetorheological fluid, a transmission shaft, a rotating blade, a magnetic conduction shell, a magnet exciting coil, an insulation ring, a fluid inlet, a fluid outlet, a bearing and a sealing element, wherein the driving disk is connected to a driving shaft; the driven disk is connected to a driven shaft; the magnetorheological fluid is filled between primary and secondary magnetic conduction disks through the fluid inlet; a sealing ring device is rotated so as to keep the magnetorheological fluid between the two disks; the magnet exciting coil is fixed in the magnetic conduction shell with no need of an electric brush; and the magnetorheological fluid is sealed between the two disks, and the rotating blade is arranged on the transmission shaft. The rotating blade is rotated under the driving of the transmission shaft, so air is guided to circularly flow through an air vent, and the excellent radiating property is maintained. The double-disk type magnetorheological clutch has the advantages of compact structure and good radiation property, and can be used for natural air cooling.
Owner:CHINA UNIV OF MINING & TECH
Motor and rotor thereof
ActiveUS20130187486A1Increased durabilityReduce Flux LeakageMagnetic circuit rotating partsMagnetic circuit characterised by insulating materialsEngineeringMotor shaft
A rotor having an improved structure capable of achieving an enhancement in durability and a motor having the rotor are disclosed. The rotor is configured to co-operate with a stator in an electromagnetic manner such that the rotor rotates. The rotor includes a sleeve having a shaft hole, through which the motor shaft extends, rotor cores spaced apart from one another in a circumferential direction of the rotor, and at least one of permanent magnets disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve. First and second cover plates are disposed at opposite sides of the permanent magnets in an axial direction. The first and second cover plates have plate holes respectively corresponding to the through holes of the rotor cores. The rotor cores and the first and second cover plates are coupled by fastening members.
Owner:SAMSUNG ELECTRONICS CO LTD
Magneto-rheological damper of automobile engine suspension system
InactiveCN102829127ASuppression of high frequency dynamic hardeningImprove the vibration isolation effectNon-rotating vibration suppressionPower flowExcitation current
The invention discloses a magneto-rheological damper of an automobile engine suspension system, comprising a main rubber spring, a throttling disk, a magnetic core assembly and a decoupling film, wherein the damper is used for regulating the magnetic induction intensity at a magneto-rheological liquid channel in the magnetic core assembly through controlling the excitation current of an electromagnetic coil and then regulating the viscosity of magneto-rheological liquid at the magneto-rheological liquid channel to achieve the optimal damping effect. When the magneto-rheological damper is used, the turbulence level of the magneto-rheological liquid in a liquid feeding chamber can be increased through the throttling disk, the high-frequency dynamic hardening of the damper can be effectively inhibited, and the effectively damping frequency range can be widened. The damper has a more ideal dynamic characteristic and meets the use requirement for damping the automobile engine suspension system with high rotating speed; in addition, the damping capacity, the work stability and the convenience in assembly of the damper are improved through improving a floating decoupling film type decoupler, a sealing structure of the magnetic core assembly, a liquid injection hole structure and the like.
Owner:CHONGQING UNIV
Linear motor and stage apparatus
A linear motor includes a magnet unit and a coil unit. The magnet unit includes two magnet arrays oppositely parallel and symmetrically located on a magnetic yoke: a first and a second magnet array. The coil unit is disposed in a magnetic gap between the two magnet arrays. In a spatial rectangular coordinate system defined by X, Y and Z axes, the coil unit includes a first and a second coil array arranged in a stacked manner in the Z-axis direction and staggered from each other by a distance of ΔP in the Y-axis direction. ΔP satisfies: when a control system charges the coil unit with a desired current, the coil unit generates a control force along the Y-axis direction, another control force along the Z-axis direction, and a moment about the X-axis direction, which may reduce a magnetic flux leakage and provide higher driving forces, making the linear motor generate required three degrees-of-freedom control force or control torque, and further improve vertical and horizontal magnetic fluxes in the magnet array.
Owner:SHANGHAI MICRO ELECTRONICS EQUIP (GRP) CO LTD
Motor and rotor thereof
ActiveUS20130187506A1Increased durabilitySimple structureMagnetic circuit rotating partsSynchronous machines with stationary armatures and rotating magnetsEngineeringMotor shaft
A rotor having an improved structure capable of achieving enhanced durability is disposed in a motor, the rotor including a sleeve having a shaft hole, through which a motor shaft extends, rotor cores spaced apart from one another in a circumferential direction of the rotor, and permanent magnets each disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve. First and second cover plates may be disposed at opposite sides of the permanent magnets in an axial direction. Each of the first and second cover plates may include a shaft receiving hole to receive the motor shaft. The rotor may include a plurality of support members each having a magnet support portion arranged to support an outer end of a corresponding one of the permanent magnets in a radial direction of the rotor.
Owner:SAMSUNG ELECTRONICS CO LTD
Magnetic jewelry clasp
A clasp in which magnetic leakage is reduced includes a pair of pieces which are to be engaged with each other. Both pieces, when being engaged, both may rotate about an axis common to both pieces. Both pieces are provided with a pair of permanent magnets held in both pieces. Both permanent magnets have front and rear surfaces in which multiple poles are magnetized, and when both pieces are engaged, the front surfaces of both permanent magnets face each other.
Owner:ISHIDA MITSUGI MR
Thin-film magnetic device, and electronic component module having same
ActiveUS20080198560A1Reduce Flux LeakageReduce leakageSolid-state devicesTransformers/inductances detailsElectrical conductorEngineering
It is an object of the present invention to provide an electronic component module with which circuit malfunction can be adequately prevented. There are provided a base having wiring, and a thin-film magnetic device provided on one side of the base. The thin-film magnetic device comprises a first magnetic film disposed facing the base, a second magnetic film disposed on the opposite side of the first magnetic film with respect to the base, and a thin-film coil wound so as to encircle the second magnetic film a plurality of times. The thin-film coil has a plurality of first conductor pattern components provided between the first and second magnetic films, a plurality of second conductor pattern components provided on the opposite side of the second magnetic film with respect to the first magnetic film, and a plurality of connecting conductors that connect the first conductor pattern components and the second conductor pattern components in series. The relative magnetic permeability of the second magnetic film is greater than the relative magnetic permeability of the first magnetic film.
Owner:TDK CORPARATION
Electric rotating machine
ActiveUS7208856B2Prevent characteristic deteriorationImprove featuresSynchronous generatorsMagnetic circuit rotating partsMagnetic polesIonization
Claw-shaped magnetic poles are alternately disposed along the rotation plane of a rotor of an electric rotating machine, and a permanent magnet is disposed between the claw-shaped magnetic poles. Surface of the permanent magnet is coated with a coating layer. The coating layer is composed of a anticorrosive material performing sacrificial anticorrosion (metal flake in a coating film rusts prior to a matrix resulting in protection of the matrix) such as inorganic material containing zinc and a film of the anticorrosive material is formed by spraying. Ionization tendency of zinc is larger than that of iron composing the permanent magnet, and the permanent magnet is difficult to be rusted owing to the sacrificial anticorrosion. Consequently, anticorrosion of the permanent magnet disposed between the claw-shaped magnetic poles is improved.
Owner:MITSUBISHI ELECTRIC CORP
Dc-dc converter
ActiveUS20090103272A1Easy to handleReduce the impactSemiconductor/solid-state device detailsSolid-state devicesDc dc converterEngineering
Owner:HITACHI METALS LTD
Quad-gapped toroidal inductor
InactiveUS20070090916A1Small sizeReduce weightTransformers/inductances coils/windings/connectionsInductance with magnetic coreFour quadrantsElectrical conductor
A high power, high frequency toroidal inductor is broken into four quadrant cores and uses bare rectangular conductors to form coils. One coil is wound centrally around each quadrant. The coils positioned centrally on the quadrants minimize the effect of damaging fringe flux and leakage flux. The coil inner winding ends are bent perpendicular to the coils to form tangential leads with one coil inner tangential lead joined to an adjacent outer coil radial lead by jumpers that span adjacent coils.
Owner:RAO DANTAM K
Electromagnetic induction heating roller
InactiveCN102325395AReduce pollutionReduce fireCoil arrangementsInduction heating apparatusElectricityKerosene
The invention discloses an electromagnetic induction heating roller in which high-frequency electromagnetic induction coils are arranged. The main body is a hollow roller body; a magnetism conductive iron core is arranged in the roller body; one end of the magnetism conductive iron core is connected with a cable connector through a half shaft; a heating coil wound on the magnetism conductive iron core is led into the roller body via the cable connector; a compensative heating coil wound on both ends of the magnetism conductive iron core is led into the roller body via the cable connector; a layer of water-filled isolating cavity is arranged in the wall of the roller body; and the surfaces of both ends of the roller body are respectively provided with a plurality of air holes for exhausting heat. The heating roller which is produced by utilizing the electromagnetic induction heating principle can replace various other heating rollers which are still used in a large quantity at present. Compared with the currently used steam heating, resistance wires, electric heating tubes or method for heating the surface of the heating roller with hot kerosene, the electromagnetic induction heating roller can save more electricity consumption and increase the temperature stability and precision of the roller surface.
Owner:张家港市弘扬机械设备有限公司
Electric rotating machine
ActiveUS20050156480A1Prevent characteristic deteriorationImprove featuresSynchronous generatorsSynchronous machine detailsElectric machineMagnetic poles
Claw-shaped magnetic poles are alternately disposed along the rotation plane of a rotor of an electric rotating machine, and a permanent magnet is disposed between the claw-shaped magnetic poles. Surface of the permanent magnet is coated with a coating layer. The coating layer is composed of a anticorrosive material performing sacrificial anticorrosion (metal flake in a coating film rusts prior to a matrix resulting in protection of the matrix) such as inorganic material containing zinc and a film of the anticorrosive material is formed by spraying. Ionization tendency of zinc is larger than that of iron composing the permanent magnet, and the permanent magnet is difficult to be rusted owing to the sacrificial anticorrosion. Consequently, anticorrosion of the permanent magnet disposed between the claw-shaped magnetic poles is improved.
Owner:MITSUBISHI ELECTRIC CORP
Axial magnetic field magnetic flux switching type surface-mounted permanent magnet memory motor
ActiveCN103490573ASimple structureReduce wind resistanceMagnetic circuit rotating partsMagnetic circuit stationary partsSurface mountingElectric machine
The invention discloses an axial magnetic field magnetic flux switching type surface-mounted permanent magnet memory motor. The permanent magnet memory motor comprises a first rotor (41), a second rotor (42), a stator (1) and an installing shaft, wherein the stator (1) is arranged between the first rotor (41) and the second rotor (42) and of an axial two-side symmetrical structure, the installing shaft is used for coaxially installing the stator (1), the first rotor (41) and the second rotor (42), and the stator is located between the two rotors to form an axial two-air-gap motor. The stator (1) is of the two-side symmetrical salient pole structure and comprises a stator iron core (2), a plurality of permanent magnets (3), a three-phase armature winding (5) and a single-phase pulse winding (6). The stator iron core (2) comprises a stator yoke (2.1) and stator teeth (2.2), wherein the stator teeth (2.2) protrude in the center direction of the first rotor (41) and in the center direction of the second rotor (42) respectively from the stator yoke (2.1). By the adoption of the permanent magnet memory motor, power density of the motor is improved, and the wide rotating speed operation range is possessed.
Owner:SOUTHEAST UNIV
Vehicular alternator and method of producing the same
InactiveUS20080048516A1Good mechanical connectionReduce dimensional toleranceMagnetic circuit rotating partsManufacturing stator/rotor bodiesMagnetPrism
In a vehicular alternator having a permanent magnet protection mechanism, each magnet holder of a non-magnetic characteristic if a rectangle prism shape accommodates each permanent magnet disposed between adjacent claw poles. The magnet holders are connected in a ring shape along a circumferential direction of the alternator by using each connecting plate part which extends from each magnet holder in approximate circumferential direction toward an inner side of and at a front tip part of each claw pole. The connecting plate parts and the magnet holders are made from a non-magnetic plate by cutting and bending. Making the surfaces and the connecting plate part of each magnet holder from the non-magnetic plate by cutting and bending provides a high accuracy magnet position in the alternator with low manufacturing cost.
Owner:DENSO CORP
Mixed excitation short-magnetic-circuit variable-reluctance motor
InactiveCN102315746AEasy to installFlexibleMagnetic circuit rotating partsMagnetic circuit stationary partsNoise levelElectrical polarity
The invention discloses a mixed excitation short-magnetic-circuit variable-reluctance motor 1 as well as a stator structure and a rotor structure thereof. An inner circular face t of a base part 2 of the mixed excitation short-magnetic-circuit variable-reluctance motor is provided with modules 2-1 which protrude inwards in a preset interval angle; the stator part comprises a plurality of H-shaped stator sections 3 and first permanent magnets 4 (1) arranged at all the H-shaped stator sections p1, and the polarities of the permanent magnets of the stator sections are opposite; an exciting winding coil is embedded into two stator slots of each H-shaped stator section 3; and the rotor part comprises a rotor body 5 and a plurality of annular body rotor sections 8 arranged on the rotor body and / or second permanent magnets 4 (2), wherein the second permanent magnets are arranged on the s3 surfaces of the annular body rotor sections, and open grooves 8-1 and 8-2 are arranged on the lateral surfaces of the annular body rotor sections. According to the invention, the rotating force of the variable-reluctance motor can be increased, the energy density is improved, the torque ripple and the vibration and noise level are reduced, the performance is stable, and the size is smaller under the requirement of same output torque.
Owner:SOUTH CHINA UNIV OF TECH
Halbach disc type magnetic coupling
InactiveCN102545538AHigh material utilizationIncrease air gap flux densityPermanent-magnet clutches/brakesMagnetEngineering
The invention provides a Halbach disc type magnetic coupling, which comprises a driving disc fixed by a driving shaft and a driven disc fixed by a load shaft. The driving disc comprises a disc body and a Halbach permanent magnet array, wherein the Halbach permanent magnet array is arranged on the surface of the disc body, and the surface faces the driven disc; and the Halbach permanent magnet array is uniformly distributed around the driving shaft, and is axially magnetized.
Owner:SHANGHAI DIANJI UNIV
Electrical machine and use thereof
InactiveUS20060131974A1Increased torque densityImprove power factorMagnetic circuitCombustion enginesElectrical conductorElectric machine
The invention relates to an electrical machine of the transversal-flux type. The machine comprises a stator and a movable element. The stator has a plurality of stator elements with magnetic flux conductors and an electric winding extending in a closed winding path through each magnetic flux conductor. The movable element comprises a number of permanent-magnet members and is movable in relation to the stator along a movement path. The winding path comprises a first current-carrying section extending along the movement path. Each magnetic flux conductor forms, together with one of the permanent-magnet members, a closed magnetic flux circuit around said current-carrying section. Each permanent-magnet member comprises a primary magnet with a magnetic direction across the movement path. Adjacently located permanent-magnet members are separated from each other by an intermediate member comprising at least one secondary magnet that has a magnetic direction essentially across the magnetic direction of the primary magnet.
Owner:VOLVO TECH
Rotor for rotating electric machine
ActiveUS20140077653A1Suppress decrease in q-axis inductanceEnhance magnetic flux saturationMagnetic circuit rotating partsSynchronous machines with stationary armatures and rotating magnetsElectric machineMagnetic poles
A rotor includes a rotor core having a plurality of pairs of magnet-receiving holes and a plurality of magnets respectively received in the magnet-receiving holes. Each pair of the magnet-receiving holes is arranged in a substantially V-shape that opens toward a stator side. The rotor core has, for each of the magnet-receiving holes, a magnetic flux barrier that is formed, at a magnetic pole centerline-side end of a stator-side wall surface of the magnet-receiving hole, so as to protrude from the stator-side wall surface toward the stator side. The protruding height H of the magnetic flux barrier from the stator-side wall surface is set to be in the following range: 0.12×R≦H 0.29×R, where R is the minimum distance from an intersection P1, which is between the magnetic pole centerline and a rotor-side circumferential surface of the stator, to the stator-side wall surface of the magnet receiving hole.
Owner:DENSO CORP
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