1327results about How to "Reduce Flux Leakage" patented technology

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.

A radiofrequency device may include an electrically conducting element associated with at least one continuous magnetic element. The first continuous magnetic element may include a substrate coated with a magnetic film having a granular structure, with grains that are inclined to the normal to the substrate, or a columnar texture inclined to the normal of the substrate.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

A DC-DC converter comprising a soft-magnetic, multi-layer substrate provided with a laminated coil constituted by connecting pluralities of conductor lines, and a semiconductor integrated circuit device comprising a switching device and a control circuit, which are mounted on the soft-magnetic, multi-layer substrate; the semiconductor integrated circuit device comprising an input terminal, an output terminal, a first control terminal for controlling the ON/OFF of the switching device, a second control terminal for variably controlling output voltage, and pluralities of ground terminals; the soft-magnetic, multi-layer substrate comprising first external terminals formed on a first main surface, first connecting wires formed on the first main surface and/or on nearby layers, second connecting wires formed between the side surface of the multi-layer substrate and a periphery of the laminated coil, and second external terminals formed on a second main surface; and terminals of the semiconductor integrated circuit device being connected to the first external terminals on the multi-layer substrate, at least part of the first external terminals being electrically connected to the second external terminals through the first and second connecting wires, and the input or output terminal being connected to the second external terminals via the laminated coil.

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.

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.

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.

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.

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.

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.

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.