170 results about "Magnetic insulation" patented technology

A manufacturing method of an LED array device uses LED devices with a vertical structure and a mother board, wherein the LED device is provided with a first magnetic part composed of soft magnetic metal; the mother board is provided with a second magnetic part composed of a hard magnetic material, and a base layer without magnetic insulation is arranged on a first plate surface; a driving circuitlayer including a plurality of welding pads arranged on the base layer, and the welding pads are corresponding to the second magnetic part; the LED devices are distributed on the driving circuit layer, the first magnetic part of the LED device is subjected to the acting force of the magnetic field of the welding pad on the second magnetic part, so that the LED device is arranged on the welding padin a positioning way; so that the LED device and the welding pad are bonded with each other; the base layer and the mother board are separated from each other to obtain an LED array device. This approach can quickly and efficiently transfer large amounts of LED devices to the driving circuit layer.

The invention relates to a miniature self-locking electromagnetic valve. The electromagnetic valve comprises a permanent magnet, an electromagnetic coil, a flange flux sleeve, a cylindrical magnetic shield, a magnetic insulation limit pad and a boss, wherein the permanent magnet is arranged between a valve seat and the lateral surface of a valve plug, and is close to the end surface of the valve seat; the electromagnetic coil is a single-coil electromagnetic coil capable of normal and reverse electrification; the flange flux sleeve is arranged among the permanent magnet, the valve seat and the valve plug; the cylindrical flux insulation sleeve is arranged between the electromagnetic coil and the valve plug; the inner end surface of the valve seat is provided with the magnetic insulation limit pad; and the boss is arranged on the end surface contacted with the valve body on the valve plug. The electromagnetic valve solves the technical problems that the conventional electromagnetic valve cannot meet the requirement of a micro-propulsion system on the power consumption and quality of the electromagnetic valve, and is the miniature self-locking electromagnetic valve with small mass, simple and reliable structure, low power consumption and quick response time.

The invention relates to a damping device, especially active vibration absorber and the control method. Said vibration absorber in vibration absorbing system comprises main drive part, vibration absorbing block, changeably stiffness part, magnetic insulation block and U-shaped bracket. The main drive part comprises permanent magnet and column electromagnet. The column iron core is fixed on the bottom of bracket and permanent magnet is fixed with vibration absorbing block by magnetic insulation block. The changeably stiffness part comprises U-shaped electromagnet and MR elastomer. U-shaped iron core is opened downward, of which MR elastomer are set on two inner sides respectively. Vibration absorbing block is set among two chips and the lower end of U-shaped iron core is fixed with the upper end of U-shaped bracket to form inner space where the main drive part, vibration absorbing block, MR elastomer and magnetic insulation block are accommodated. The control method is that the changeably stiffness part and main drive part are controlled respectively according to frequency, amplitude value and phase information of vibration-damping objects. The invention belongs to half-active and active combined control and is provided with low consuming and wide vibration-damping frequency so on.

The invention discloses a radial magnetic bearing of a low-power consumption inner rotor of a permanent-magnetic up-attracting and down-repelling structure, which consists of an outer magnetic conduction ring, an outer magnetic insulation ring, a stator core, a magnet exciting coil, an inner permanent-magnetic ring, a rotor core, an inner magnetic insulation ring, an inner magnetic conduction ring, an outer permanent-magnetic half ring, an air gap and a rotating shaft. The stator core is provided with eight electromagnetic poles and four permanent-magnetic poles in the positive and negative directions of an X axis and a Y axis, the outer magnetic insulation ring is arranged between a permanent-magnetic core and an electromagnetic core on a stator, and the outer permanent-magnetic half ring is clamped in the middle of two permanent-magnetic cores in the negative direction of the Y axis of the stator through the outer magnetic conduction ring. The air gap is reserved between the stator core and the rotor core, the inner magnetic insulation ring is arranged between a permanent-magnetic core ring and an electromagnetic core ring on a rotor, the inner magnetic conduction ring is arranged between the permanent-magnetic core rings, and the inner permanent-magnetic ring is clamped in the middle of the inner magnetic conduction ring. The radial magnetic bearing of the low-power consumption inner rotor has the advantages of low power consumption, simple control, convenient manufacture and the like, and can be used as a non-contact support component of rotary equipment such as wind driven generators, electro motors, molecular pumps, high-speed bearings, machine tools and the like.

The invention relates to a forming and imaging method of a magnetic resonance image collection, registering and imaging system, wherein the system comprises a PET machine, an MR machine, a CT machine and an image processing work station, and particularly, the system also comprises a movable scanning bed and a magnetic insulation door which can be simultaneously applied to the PEC machine, the MR machine and the CT machine. The imaging method mainly comprises the following steps: moving the movable scanning bed to respectively carry out scanning along the MR machine, the PET machine and the CT machine without changing the body position of a detected object to collect three groups (MR, PET and CT) of images of the same part; carrying out three-dimensional reconstruction on the three groups of images by the image processing work station; carrying out the first registering and fusion by using the PET / MR and the PET / CT; and using image batch processing programs for simultaneously carrying out the second registering and fusion on the PET images and the MR fracture layer collection images on the same layer in the same position. The imaging quality is obviously improved, at the same time, the radiant quantity of a scanning system is obviously reduced, and the injury on the detected object is reduced.

A heat dissipation magnetic insulation tape includes an insulating protective adhesive layer, a composite heat dissipation adhesive layer, and a magnetic insulation adhesive layer which are stacked. the composite heat dissipation adhesive layer is made of thin metal foil coated with heat dissipation graphene, which has good thermal diffusion performance. At the same time, compared with the traditional graphite sheet, the metal foil is not fragile, and no fragments will enter the equipment body. In addition, the metal foil also has excellent electromagnetic shielding function. The heat dissipation and magnetic insulation tape has the characteristics of excellent magnetic insulation effect, good heat dissipation performance and stable adhesion. A wireless charging power receiver includes theheat dissipation magnetic isolation tape, which is thin in thickness, excellent in heat dissipation magnetic isolation performance, stable in adhesion performance, and has high charging efficiency.

The invention discloses an auxiliary braking device of a cordless elevator and a control method thereof. A break body is composed of a magnetic shaft, a magnetic insulation front cover, a rear baffle and two lateral walls and encircled into a hollow structure with a cylindrical middle, and the magnetic shaft is arranged in the hollow structure and can rotate in the hollow structure; and the magnetic shaft is cylindrical and formed by two permanent magnets and a magnetic insulation interlayer which is arranged in the middle and fixedly connected with the two permanent magnets, magnetic pole directions of two permanent magnets in a same radial direction are identical, and one end of the magnetic shaft is fixedly connected with a rotating mechanism which is connected with an electronic control unit. During emergency braking, the electronic control unit controls a break boot to be close to a rail, and non-contact vortex braking force is generated between the break boot and the rail; the electronic control unit controls the rotating mechanism to rotate, and magnetic pole attraction is produced between the break boot and the rail, so that the break boot is absorbed on the rail, and friction braking force is generated; and the problem that sufficient braking force cannot be provided under the condition that emergency braking happens to a prior cordless elevator is solved.

The invention relates to a linear motor shock absorber used for an automobile in-wheel active suspension, and belongs to the technical field of automobile accessories. The linear motor shock absorber mainly comprises a motor shock absorber body, supports, wheels, a passive suspension spring and a passive shock absorber body. The motor shock absorber body is arranged in the wheels through the supports and comprises a peripheral magnetic insulation sleeve, end covers, a rotor, a stator and linear cylindrical slide rails. The stator comprises a cylindrical supporting shaft, annular stator magnetic conduction back iron, annular S-pole permanent magnets and N-pole permanent magnets. The rotor comprises an annular rotor iron core magnetic conductor, winding coils, Hall sensors, annular grooves and rotor teeth. The movable ring structure with the stator on the inner portion and the rotor on the outer portion is adopted for the motor shock absorber body. The rotor can slide up and down along the stator through the cylindrical slide rails. The motor shock absorber body is connected with the passive suspension spring and the passive shock absorber body in parallel, wherein the passive suspension spring and the passive shock absorber body are arranged outside the wheels. The linear motor shock absorber used for the automobile in-wheel active suspension has the advantages that the operation force is adjustable, passive energy recovery is achieved, the size is small, and the stroke is large.

The invention discloses a low-loss magnetic insulation sheet preparation process and a magnetic insulation sheet. The low-loss magnetic insulation sheet preparation process disclosed by the inventionis reasonable and simple in structure, low in production cost and complete in function. The gaps with uniform and orderly shapes and a certain size are formed by contacting a graphic tube and the strip material through the surface treatment process, the powder surface insulation and surface phosphating process and surface oxidation method, so that the electromagnetic property magnetic conductivityof the magnetic insulation sheet is relatively average, the magnetic loss is small, the quality factor is high, the shapes are really uniform in size, the gap sizes are good in consistency, the colloid fallibility is excellent, the surface impedance is increased, and the eddy current loss is small; the eddy current loss is further reduced after adding the strip material surface treatment, so thatthe discharging efficiency is improved, the magnetic insulation sheet is good in stability, and the automation is easy to realize.

A micro power converter with multiple outputs includes a semiconductor substrate with a semiconductor integrated circuit formed thereon, a thin film magnetic induction unit, and a capacitor. The thin film magnetic induction unit is formed of a plurality of thin film magnetic induction components formed on magnetic insulation substrates, and a magnetic isolation layer is provided for magnetically isolating the thin film magnetic induction components with each other.

The invention relates to a built-in permanent magnet synchronous motor used for a high-speed electric spindle. The built-in permanent magnet synchronous motor comprises a stator iron core, a rotor iron core, a rotation shaft, magnetic steel and stator three-phase symmetrical windings. The built-in permanent magnet synchronous motor is characterized in that the magnetic steel is V-shaped magnetic steel which is evenly inlaid in the circumferential direction and radially magnetized; the V-shaped magnetic steel comprises a plurality of permanent magnets, a plurality of magnetic insulation bridges and a plurality of magnetic bridges; the permanent magnets are arranged on the two sides of the V-shaped magnetic steel, the magnetic bridges are arranged between the adjacent permanent magnets and the magnetic insulation bridges are arranged at the top ends of the V-shaped edges on the two sides and the bottom ends of the V-shaped magnetic steel. The built-in permanent magnet synchronous motor used for the high-speed electric spindle has the advantages that the motor has the high-torque running performance achieved during low-speed running, and has a wide weak magnetic speed raising range at the constant power section above base speed; during constant-power high-speed running, the leakage flux of the permanent magnets is high and the weak magnetic speed raising capacity is high; during non-load running, the leakage flux of the motor is low and the output torque is high; the segmented unequal-thickness magnetic steel enables gap flux densities of the motor to be distributed similar to a sine, therefore, the torque pulsation is low, the control precision is high and the permanent magnets of the motor are not prone to excitation loss.

A wire rope flaw detector comprises a back yoke (3) and excitation permanent magnets (4a, 4b), which form a main magnetic path in a predetermined section of a wire rope (1) in the axial direction; a magnetic path member (7) arranged in the predetermined section to be magnetically insulated from the back yoke (3) and the permanent magnets (4a, 4b) and making the leakage flux generated from a damaged part (10) of wire rope detour to the outside of the wire rope (1); and a detection coil (8) wound around the magnetic path member (7) for detecting leakage flux. The amount of leakage flux can be increased by providing the magnetic path member (7) and since the windable area of the detection coil (8) is increased, the number of turns of detection coil can be increased.

The invention discloses a standard magnetic suspension hybrid bearing-supported rotor for a high-speed induction electrical rotating machine, which comprises a standard magnetic suspension supportingsystem with permanent magnetic suspension and a rolling bearing for auxiliary support, a rotor core winding and a rotating shaft, wherein in the standard magnetic suspension supporting system, a permanent magnetic radial bearing adopts a plurality of parallel groups of axially magnetized inner and outer magnetic rings and an angular contact ball bearing is used for providing radial auxiliary support and withstands an axial push thrust with a thrust bearing; a rotor core lamination adopts a circular closed slot and a core winding adopts cold riveting joint; the inner magnetic rings are providedwith magnetic insulation inner sleeves and outer layer protective sleeves and cooling air ducts are preserved between the outer magnetic rings. The standard magnetic suspension hybrid bearing-supported rotor and the high-speed induction electrical rotating machine of the invention ensure that the peripheral velocity of the rotor is stably up to over 200m / s and the effect is remarkable.

The invention discloses a less-rare-earth multi-excitation-source double-stator flux-switching memory motor, which belongs to the technical field of motor body design and operating principles. Coaxial outer stators, rotors and inner stators are sleeved together in turns from outside to inside to compose the memory motor, wherein a radial air gap exists between the outer stators and the rotors, the rotors and the inner stators, the outer stators are composed of armature core teeth, fault-tolerant teeth and stator yokes, and the rotors are composed of a rotor support, a magnetic silicon steel block and a magnetic insulation block, and meanwhile, the inner stators are composed of the inner stator core and a combined permanent-magnet cell block. The double-stator structure of the motor realizes the separation of armature winding and permanent magnet and solves the problem that multiple excitation sources inside the traditional flux-switching permanent magnet motors restrain each other, thereby easily increasing motor power density and torque density. The memory motor maintains high air-gap flux density and ensures of the motor power density and the torque density, meanwhile, the consumption of rare-earth permanent-magnetic materials is effectively lowered. On the other side, the memory motor can realize flexible adjustment of a motor air-gap field and expand the range of speed operation.

The invention discloses a double-magnetism barrier tunnel junction and a self-rotating electronic device comprising the same. The double-magnetism barrier tunnel junction comprises a first conductive layer, a first barrier layer arranged on the first conductive layer, and a second conductive layer arranged on the first barrier layer, a second barrier layer arranged on the second conductive layer, and a third conductive layer arranged on the second barrier layer, wherein each of the first barrier layer and the second barrier layer is made of the magnetic insulation material.

The invention provides a moisture-proof magnetic isolating device for a transformer. The magnetic isolating device comprises a safety groove formed in the circumference of a transformer body, a protection mechanism arranged in the safety groove, a guard plate mechanism arranged on the safety groove, a safety mechanism arranged in the safety groove, a drying mechanism arranged in the safety grooveand matched with the safety mechanism, and a control mechanism arranged in the safety groove for being connected with the protection mechanism, the guard plate mechanism, the safety mechanism and thedrying mechanism. According to the moisture-proof magnetic isolating device for the transformer, each mechanism is controlled and coordinated, and the incorporation of the protection mechanism into the safety groove is achieved when strong convective weather or maintenance of the transformer or power failure occurs, use safety of the device is ensured, online magnetic insulation on site can be achieved, the safety groove can be quickly dried, meanwhile a small space is occupied, self-protection can be achieved in disaster weather, and damage caused by the strong convective weather is prevented.

The invention relates to a double-cylinder by-pass type magnetorheological vibration damper. The vibration damper comprises a working cylinder barrel, a liquid storage cylinder barrel, a piston and apiston rod, wherein the piston rod penetrates through a guide ring, and the guide ring is connected with a liquid storage cylinder body together; a magnetorheological effect valve and the whole vibration damper are installed together by the guide ring; a magnetic conductive sleeve connected with the magnetorheological effect valve by a magnetic insulation gasket is sequentially provided with an upper magnetic conductive plate, a magnetic insulation washer, a middle magnetic conductive plate, a magnetic insulation washer and a lower magnetic conductive plate along the inner axial direction; electromagnetic coils are sleeved on the circumferences of the upper magnetic conductive plate, the middle magnetic conductive plate and the lower magnetic conductive plate by magnetic insulation sleeves; the middle parts of the upper magnetic conductive plate and the lower magnetic conductive plate are provided with axial through holes communicated with a liquid discharge hole and a press plate oilduct; and three arc grooves are uniformly distributed at the circumference of the middle magnetic conductive plate. When the piston rod moves, magnetorheological fluid flows among a working cylinder,the magnetorheological effect valve and a liquid storage cylinder. The invention can ensure a larger stroke and be beneficial to dissipating the heat of the electromagnetic coils; and the flow of themagnetorheological fluid in the coils not only can generate large damping force but also ensure portable integration.

A noise suppression cable includes a conductor wire, and a magnetic insulation layer that is formed around the conductor wire and includes an insulating material and a flat-shaped magnetic powder. A flatness direction of the magnetic powder is oriented in a circumferential direction of the magnetic insulation layer.

The invention provides a secondary inner cylinder having high voltage superposition efficiency. A smooth transition structure is shown on the surface of an impedance conversion segment of the secondary inner cylinder, the running impedance of the impedance conversion segment of a magnetic insulation transmission line formed by the secondary inner cylinder and the inner wall of an induction cavity unit is in the form of exponential conversion, the average impedance of the magnetic insulation transmission line is obviously smaller than that of a conical or a stepped secondary inner cylinder, thereby being favorable for reducing reflected waves at a feeding port of each induction cavity unit and improving voltage coupling efficiency. Meanwhile, the research results show that the standard exponential impedance conversion form has highest power transmission efficiency, so that high pulse voltage peak can be obtained at the load, and when overmatching coefficient p is larger than 1.5, the voltage superposition efficiency of the secondary inner cylinder is superior to that of the conical or stepped secondary inner cylinder.

The invention discloses a raw material filtering device for supercritical extraction pretreatment, and belongs to the technical field of supercritical extraction. After a raw material liquid enters a filter cartridge, residues in the raw material liquid are filtered out through an annular filter screen, so that the raw material liquid falls down to collide with a lotus leaf membrane to drive a carbon dioxide aqueous solution to fluctuate; carbon dioxide gas is promoted to overflow into the expansion air bag, so that the expansion air bag expands to extrude the elastic film to hunch up, raw material liquid and residues on the surface of the expansion air bag are promoted to roll down to be filtered, part of the carbon dioxide gas enters the L-shaped pipe to extrude the piston to move upwards, magnetic insulation powder enters the magnetic insulation sleeve, and the magnetic influence of the single-face magnetic rod at the magnetic insulation sleeve is shielded; and the single-sided magnetic rods at other positions are attracted by the magnet blocks, move close to the magnet blocks and drive the rotating disc to rotate slowly, so that the annular filter screen is driven to rotate, residues on the surface of the annular filter screen are thrown to the annular collecting cylinder through centrifugal force of rotation, the possibility of blockage of the annular filter screen is reduced, and the filtering effect is enhanced.

The invention provides a solenoid with a sealing outer shell and a motion detector circuit which can feedback the operating state of an iron core; the invention can be applied to all automatization control equipments, and is particularly superior while being used in the severe operational environment. The keep solenoid with signal feedback comprises a magnetic insulation wire axes, wherein the middle part of the magnetic insulation wire axes is provided with a through hole extended along the axial direction; the periphery of the magnetic insulation wire axis is wound with coils; the solenoid also comprises a movable iron core which can be movably and freely received in the through hole of the magnetic insulation wire axis, a magnet fixing part which is used to adsorb the movable iron core, a return spring which can push the movable iron core along the direction away from the magnet fixing part, a shell which covers two end faces of the magnetic insulation wire axes and side faces of the coils and a testing circuit which is arranged inside the shell and close to the movable end face of the movable iron core; the testing circuit comprises a signal detecting device which can detect and feedback the position of the movable end face of the movable iron core.

The invention relates to the field of electronic power control, in particular to a control system for I-type and T-type three-level bidirectional PWM (Pulse-Width Modulation) rectifiers. The control system comprises an analog quantity data collecting and conditioning circuit, an IGBT (Insulated Gate Bipolar Translator) magnetic insulation drive circuit, a control circuit consisting of a DSP (Digital Signal Processor) and a CPLD (Complex Programmable Logic Device), a relay output and digital signal input device, and a fault recording and remote communication device, and is characterized in that a Hall sensor data collecting circuit, an IGBT drive circuit and an input and output interface circuit are connected with a CPLD chip; a communication circuit and a fault recording circuit are connected with the DSP; and the DSP and the CPLD are connected with interrupt signals through data, an address bus and a PWM output signal. The control system can be compatible with T-type and T-type three-level topology frameworks, the control system adopts a control framework of the DSP and the CPLD, and the CPLD is responsible for logic control, three-level PWM signal detection and correction functions and the like as a coprocessor, so that the system reliability is improved, and the budget burden of the DSP is alleviated.

The present invention discloses an annular permanent magnetism gearless ball mill direct drive motor, and belongs to the ball mill drive equipment technology field. The direct drive motor comprises a stator and a rotor, wherein the rotor is fixedly installed on the outer surface of a ball mill cylinder via a block type rotor iron core and is concentric with the ball mill cylinder, the stator is a sectional stator, is laminated and spliced into a whole circle to sleeve the periphery of the rotor and is concentric with the rotor, and the block type rotor iron core is formed by laminating and splicing small fan-shaped punching sheets. A part of magnetic steel of the rotor is wrapped in a pole shoe, the other part is embedded in the rotor iron core, and air magnetic insulation grooves are arranged between the fan-shaped punching sheet structures and the ball mill cylinder. According to the present invention, the gear transmission mechanisms, such as a reducer, a small gear, a large gear ring, etc., in the conventional ball mill are canceled, thereby effectively improving the transmission efficiency of a system, avoiding and reducing the maintenance work of the gears, prolonging the overhauling cycle and the service life of the equipment, and improving the reliability of the equipment.

The invention discloses a rotor core, which is an annular structure formed by splicing a plurality of arc-shaped core units. Each core unit has splicing surfaces which are attached to adjacent core units, and the splicing surfaces are located at the centers of magnetic insulation magnetic bridges. The rotor core of the invention adopts a splicing block structure, which can improve the material utilization rate and reduce the material cost; at the same time, splicing joints are disposed at the centers of the magnetic insulation magnetic bridges of permanent magnets and the welding slots are arranged at both ends of the splicing joints. After splicing, the magnetic circuit integrity of the rotor core is ensured, the structural strength is ensured, and the magnetic permeability and mechanicalproperties of the rotor core are not affected. The invention also discloses an outer rotor motor, a driving motor for an electric vehicle and a method for manufacturing the rotor core.

The invention discloses a micro-stroke, double-redundancy torsion-preventive LVDT displacement sensor, and belongs to a displacement sensor. The sensor comprises first and second coil assemblies, a magnetic insulation pad, an iron core assembly, a sleeve, a casing, a leading-out wire and an end cap, the first and second coil assemblies and the magnetic insulation pad are mounted in the casing, one end of the iron core assembly is sleeved by the first and second coil assemblies and the magnetic insulation pad, the magnetic insulation pad is positioned between the first and second coil assemblies, the other end of the iron core assembly is suspended beyond the casing, one end of the sleeve is sleeved among the first and second coil assemblies and the magnetic insulation pad, the other end of the sleeve is suspended outside the casing, one end of the leading-out wire is lead out of the second coil assembly, penetrates the magnetic insulation pad and is fixed to the first coil assembly, and the other end of the leading-out wire penetrates out of the casing. The sensor has the advantages of double redundancy, torsion prevention, high stability and high withstand voltage.

A noise suppression cable includes a conductor wire, and a magnetic insulation layer on a periphery of the conductor wire. The magnetic insulation layer includes an insulating material and two or more types of magnetic powders that have different frequency characteristics from each other.

The invention provides a novel conductive roller device which aims at overcoming the defect that when a conductive roller of a soft-melting section of electrotinning is energized with AC, the conductive roller emits heat due to electromagnetism induction phenomenon; the novel conductive roller device is adopted especially at the position of a bearing seat or a bearing; pressing roll devices 1 are installed at the two sides of a stander 2, electricity collecting rings 4 are arranged at the two ends of the conductive roller; a bearing end cover 5, the bearing seat, the conductive roller 9 and a carbon brush device 10 are positioned at the lower side of the electricity collecting rings 4; the bearing seat comprises an upper part and a lower part which are an upper bearing seat 6 and a lower bearing seat 7 that are separated from each other by an insulation board, the material of which has magnetic insulation property; furthermore, the bearing seat is made of the material with the magnetic insulation property, and the bearing is also formed by the material with the magnetic insulation property; the bearing end cover 5 is made of the material with the magnetic insulation property, so that a ring-shaped magnetic field is avoided being formed, and the heat emitting phenomenon is prevented, thus greatly improving the working condition of the bearing, increasing the production efficiency, and saving the time and the production cost.

The invention discloses a method for preparing a samarium cobalt and iron cobalt composite magnet. The method comprises the following steps of smelting samarium-copper alloy, forming thin strips through throwing, and crushing the strips into powder; smelting iron-cobalt alloy, carrying out annealing treatment, and then, crushing the iron-cobalt alloy into powder; and mixing samarium-copper powder and iron-cobalt powder, annealing the powder in vacuum, thereby obtaining a nanocomposite magnet. According to the method, the samarium-copper powder and the iron-cobalt powder are annealed together, and the samarium-copper powder is diffused to the surface layer of the iron-cobalt powder so as to form a Sm-Co-Cu hard magnetic shell layer; and particularly, samarium-copper eutectic alloy has a lower melting point and can be melted and diffused at a lower annealing temperature, so that the abnormal growth of crystal grains of the nanocomposite magnet at high temperature is inhibited. According to the nanocomposite magnet prepared by the method, no obvious boundary exists between a soft magnetic phase and a hard magnetic phase, anisotropic fields are in continuous transition, a non-magnetic samarium-copper phase is coated on the external surface of Sm-Co-Cu so as to play a magnetic insulation role, and therefore, the coercivity of the composite magnet is further improved.

The invention belongs to the technical field of self-locking valves, and particularly relates to a permanent-magnet type self-locking valve. According to the permanent-magnet type self-locking valve,an outlet pipe, a first magnetic insulation ring, a magnetic guiding ring, a second magnetic insulation ring and a right skeleton are connected in a welded mode to form a coil skeleton; a permanent magnet assembly is arranged on the outer circle of the magnetic guiding ring in a sleeving mode, and a staring coil and a closing coil are wound around the outer circle of the coil skeleton and are located on the left side and the right side of the permanent magnet assembly correspondingly; the coil skeleton is sleeved with a shell, and the shell is connected with the outlet pipe and the right skeleton in a welded mode; a valve core is located in an inner hole formed by the first magnetic insulation ring, the magnetic guiding ring and the second magnetic insulation ring, and a spring is arrangedbetween the outlet pipe and the valve core; an inlet pipe is screwed into the right skeleton, the juncture of outer circles of the inlet pipe and the right skeleton are welded and fixed; and a filterassembly is fixedly mounted in an inlet pipe inner hole. The permanent-magnet type self-locking valve has the characteristics of the compact structure, the low weight, the small size, the high reliability of the whole valve and the high anti-pollution ability.

A three-dimensional planar magnetic sensor comprises a first magnetic sensor, a second magnetic sensor, a third magnetic sensor and a circuit. The first magnetic sensor, the second magnetic sensor and the third magnetic sensor are arrange on the same plane and respectively measure component of a magnetic field in the first, second and third directions, and the third direction is perpendicular to the first direction and the second direction. The third magnetic sensor comprises a third fixed layer, a third magnetic insulation layer and a third free layer, wherein the magnetization direction of the third fixed layer is the third direction or the reverse direction, the spontaneous magnetization of the third free layer is the first direction and the second direction or inclines to the third direction by 0-180 degrees, the magnetic resistance value is an intermediate value in the spontaneous magnetization direction and changes along with the magnetic field. The three-dimensional planar magnetic sensor is manufactured by the semiconductor processing technology without vertical binding, output and durability are improved, and cost and time are saved.