39 results about "Samarium cobalt" patented technology

The invention discloses a preparation method for rare earth permanent magnet single-piece forming, and belongs to the technical field of rare earth permanent magnet preparation. Comprising the following steps that 1, raw material powder is prepared, specifically, rare earth alloy is smelted and then condensed into sheets, then fine powder is obtained through a hydrogen explosion crushing technology, an antioxidant and a grain refiner are added, and the raw material powder is obtained through uniform mixing; 2, single-sheet mold orientation pressing, wherein the single-sheet mold with a nanometer coating is used for conducting two-step pressing on the raw material powder under the pulsed magnetic field; step 3, sintering and post-processing: sintering the material obtained by pressing in the step 2 in stages, and then applying an auxiliary magnetic field for cooling; the invention specifically focuses on an innovative method for preparing a high-performance rare earth permanent magnet by means of a single-piece forming process. The method has remarkable advantages and wide applicability in the aspect of efficient and low-cost production of permanent magnets such as neodymium iron boron and samarium cobalt.

The invention relates to the technical field of permanent magnet materials, in particular to a method for increasing resistance of a permanent magnet, which comprises the following steps of: (1) weighing raw materials, smelting and refining to obtain alloy melt; (2) the alloy melt is subjected to cooling, powdering, forming, sintering treatment and aging treatment, cooling is conducted, and a samarium cobalt blank is obtained; (3) the samarium cobalt blank is subjected to machining grinding, slicing, end face grinding, cleaning and drying, and a plurality of flaky magnets are prepared; sequentially performing argon plasma treatment and nitrogen plasma treatment on each end surface of the flaky magnet, and sputtering a boron nitride layer and a silicon dioxide layer on the end surface of the flaky magnet by adopting a magnetron sputtering method; and carrying out annealing treatment, bonding and curing treatment to obtain the high-resistance permanent magnet. According to the method for increasing the resistance of the permanent magnet, the resistance of the rotor magnet can be effectively increased, and eddy current generated by the motor rotor magnet is further reduced.

The invention discloses a samarium-cobalt magnet and a preparation method thereof. The samarium-cobalt magnet takes low-melting-point alloy powder, samarium oxide powder and samarium-cobalt magnetic powder as raw materials; the component of the samarium cobalt magnetic powder is Sm (Co < 1-a-b-c > Fe Cu Zr < c >) < z >; the component of the low-melting-point alloy is RE1-xMx, RE is one or more of Pr, Nd and Sm, and M is one or more of Cu, Al and Ga. The preparation method comprises the following steps: smelting a samarium-cobalt alloy raw material and a low-melting-point alloy raw material, and sequentially performing coarse crushing, medium crushing and jet milling to obtain samarium-cobalt magnetic powder and low-melting-point alloy powder; mixing samarium oxide powder, low-melting-point alloy powder and samarium cobalt magnetic powder to obtain magnetic powder; sequentially performing magnetic field forming, cold isostatic pressing and low-temperature sintering to obtain a sintered blank; and the sintered blank is sequentially subjected to solution treatment and aging heat treatment. The bending strength and the fracture toughness of the samarium-cobalt magnet are greatly improved, and the samarium-cobalt magnet has high magnetic performance and good mechanical performance.

The invention discloses a rotor topological structure for preventing demagnetization of magnetic steel, which comprises a rotor iron core, the rotor iron core is provided with a plurality of magnetic poles, main magnetic steel grooves which are symmetrically arranged in a V shape are arranged on the rotor iron core under the same magnetic pole, and main magnetic steel made of neodymium iron boron materials is embedded in the main magnetic steel grooves. Auxiliary magnetic steel grooves are respectively arranged near two end parts of the main magnetic steel close to the excircle direction of the rotor, auxiliary magnetic steel made of samarium cobalt materials is embedded in the auxiliary magnetic steel grooves, and the auxiliary magnetic steel is used for increasing the local magnetic resistance of the area where the auxiliary magnetic steel is located so as to restrain the demagnetization of the end parts of the main magnetic steel; the design cost of the rotor topological structure is slightly increased, the influence on a main magnetic field is small, and the anti-demagnetization capability can be remarkably improved.

The invention belongs to the technical field of permanent magnet materials, and relates to a preparation method of a high-strength and high-toughness samarium-cobalt permanent magnet, which comprises the following steps: burdening, smelting, pulverizing, orientation forming, cold isostatic pressing, sintering, solid solution and aging treatment. The aging treatment comprises the following steps: under the protection of inert gas, carrying out primary heat treatment at 780-880 DEG C for 500-1500 minutes, then closing the inert gas, cooling to 200-500 DEG C, carrying out secondary aging treatment, carrying out heat preservation for 30-600 minutes, applying an external magnetic field, and finally cooling to room temperature. According to the method, an external magnetic field is added during secondary aging, gas protection is cancelled, the gas cost is reduced, and meanwhile, the mechanical property of the samarium-cobalt magnet is greatly improved under the condition that it is guaranteed that the magnetic property is basically unchanged.

The present application provides a samarium cobalt permanent magnet material and a preparation method thereof. The preparation method comprises: step S1, according to the nominal composition Sm u Co v Cu w Fe x Zr y (Gd 0.5 Er 0.5 ) 0.5‑z Dy z The invention relates to a method for preparing a mixture by mixing ingredients; step S2, smelting and casting the mixture under an inert atmosphere to obtain an ingot; step S3, crushing the ingot to obtain alloy powder; step S4, orienting and forming the alloy powder and pressing the alloy powder to obtain a green body; step S5, sintering and solution treating the green body to obtain a samarium-cobalt solid solution magnet; step S6, providing a metal coating layer on the surface of the samarium-cobalt solid solution magnet and performing an aging treatment to obtain a samarium-cobalt permanent magnet material. Heavy rare earth elements and medium-heavy rare earth elements (Er) are added to the raw materials to compensate for the negative temperature coefficient of residual magnetism. At the same time, through the coordination of the above steps, especially the aging treatment after coating the metal coating layer, the microstructure of the samarium-cobalt magnet is regulated, so that the samarium-cobalt permanent magnet material has an excellent low temperature coefficient of residual magnetism, a maximum operating temperature of 500°C, and excellent initial magnetic properties at room temperature.

This invention relates to a method for improving the machining quality and yield of samarium cobalt magnets, belonging to the field of precision machining technology for rare earth permanent magnet materials. The method includes: crystal orientation detection and determination of the free-cutting direction, directional compensation cutting, segmented temperature-controlled precision grinding, stepped vacuum stress relief treatment, and online closed-loop detection. Through five-segment coordinated control, the dimensional accuracy reaches ±0.003mm, the chipping and cracking defect rate is less than 0.5%, and the yield is increased to over 98%.

The utility model discloses a lightweight permanent magnet synchronous motor for an electric aircraft. An electromagnetic structure in the motor comprises a stator iron core, an armature winding, a permanent magnet, a rotor magnet yoke and a rotor bracket, the stator iron core is of an annular columnar structure, stator grooves penetrating through the axial direction are evenly formed in the end face of the stator iron core in the circumferential direction, and armature windings are arranged in the stator grooves. A rotor magnet yoke is arranged to be of an annular thin-wall structure, a plurality of pole permanent magnets which are sequentially connected are evenly pasted to the outer ring wall face of the rotor magnet yoke in the circumferential direction, and an excitation assembly of an annular columnar structure is formed by the pole permanent magnets. The rotor magnet yoke and the permanent magnets of each pole adhered to the outer side wall of the rotor magnet yoke are mounted on the inner side of the stator iron core through the rotor bracket, and the permanent magnets of each pole and the inner side wall of the stator iron core form an annular thin-wall gap, so that the rotor magnet yoke, the permanent magnets of each pole and the rotor bracket rotate relative to the stator iron core; the permanent magnet of each pole is of a segmented structure and is divided into four segments which are arranged in a central symmetry mode, and the four segments comprise the two samarium cobalt permanent magnets located in the middle and the two neodymium iron boron permanent magnets located on the two sides. According to the technical scheme of the utility model, the problem that as most of the existing aviation permanent magnet synchronous motors adopt high-speed and high-electromagnetic-load design, the temperature rise of the motors is too high, and the stable operation of the motors is greatly threatened is solved.

The invention provides a method for preparing a samarium-cobalt permanent magnet material based on pre-aging treatment, and relates to the technical field of samarium-cobalt permanent magnet materials. The invention discloses a method for preparing a samarium cobalt permanent magnet material based on pre-aging treatment. The method comprises the steps of precursor preparation, solution treatment, pre-aging treatment, rapid cooling, main aging treatment and the like. Through pre-aging treatment, segregation of solute atoms is promoted at low temperature, high-concentration point defects are formed, uniform and high-density nucleation sites are provided for main aging Sm (Co, Cu) 5 cell wall phase precipitation, precipitation kinetics is accelerated, a nano cellular structure is refined, fine regulation and control of a microstructure are achieved, and the mechanical properties of the Sm (Co, Cu) 5 are improved. The intrinsic coercive force of the magnet is remarkably improved, the residual magnetism and the maximum magnetic energy product of the magnet are synergistically improved, and the prepared samarium-cobalt permanent magnet material is higher in cell wall density, more uniform in distribution and more excellent in comprehensive magnetic performance.

The invention belongs to the technical field of flexible magnetic materials, and particularly relates to a flexible magnetic material and a preparation method and application thereof. The flexible magnetic material comprises the following components in parts by mass: 80-90 parts of magnetic powder, 10-15 parts of a binder, 1-2 parts of a plasticizer, 0.4-0.9 part of a vulcanizing agent and 0.5-1.0 part of an anti-aging agent, the magnetic powder is selected from at least one of modified neodymium iron boron magnetic powder, ferrite, samarium iron nitrogen and samarium cobalt; the modified neodymium iron boron magnetic powder is prepared by using bis [3-(triethoxy silyl) propyl] tetrasulfide for modification; the binder is prepared from NBR rubber A, NBR rubber B and natural rubber according to the mass ratio of (1.3 to 1.5) to (0.4 to 0.6) to (0.8 to 1.0). The flexible magnetic material has excellent magnetic performance and mechanical performance, and is good in stability.

A magnet includes a three-dimensional structure with nanoscale features, where the three-dimensional structure has a near net shape corresponding to a predefined shape.

This invention relates to the field of microwave ferrite device technology and discloses a dual-section microstrip circulator, comprising: a magnetic sheet, and a ferrite gyromagnet and a resistor disposed on the upper surface of the magnetic sheet, wherein a circuit is added to the upper surface of the ferrite gyromagnet, and the circuit is connected to a microstrip filter; a ceramic sheet disposed on the upper surface of the circuit, and a samarium cobalt is added to the top of the ceramic sheet. This dual-section microstrip circulator, through the combined structure of the magnetic sheet, ferrite gyromagnet, circuit, microstrip filter, ceramic sheet, samarium cobalt, and resistor, can effectively improve isolation and meet the system's high isolation requirements; the microstrip filter connected to the circuit can improve the second harmonic characteristics, improving the problem of poor second harmonic characteristics in conventional microstrip circulators; the ferrite gyromagnet, as a gyromagnetic material, combined with the dual-section circuit design, helps to achieve low transmission loss characteristics; the overall structural design makes the circulator small in size and light in weight, and has high reliability.

The invention belongs to the technical field of magnetic complexes, and particularly relates to an ultrathin strong magnetic sheet, a preparation method thereof and application of the ultrathin strong magnetic sheet in eyelash ornaments. The ultrathin strong magnetic sheet comprises the following raw materials in parts by weight: 85-90 parts of magnetic powder, 5-10 parts of a composite binder and 2-6 parts of a coupling agent, the magnetic powder is selected from any one of ferrite magnetic powder, samarium iron nitrogen magnetic powder, samarium cobalt magnetic powder and neodymium iron boron magnetic powder. The ultrathin strong magnetic sheet provided by the invention can realize excellent magnetic induction intensity stability, damp heat resistance and salt fog resistance when the thickness is 0.1 mm, and has a good application prospect in eyelash ornaments.

The method comprises the steps that after samarium-cobalt permanent magnet powder and PrO2 powder are mixed, orientation forming, sintering, solid solution and aging treatment are carried out, PrO2 reacts with the samarium-cobalt permanent magnet at the high temperature, a (Sm, Pr) (Co, Fe, Cu and Zr) alloy matrix is formed, the saturation magnetization intensity of the matrix is improved, and the coercive force and the residual magnetism of the samarium-cobalt permanent magnet material are synchronously improved. Meanwhile, by means of the relatively low solid solubility of Cu in a (Sm, Pr) (Co, Fe, Cu and Zr) alloy matrix, part of Cu is driven to be separated out to a grain boundary area, grain boundary Cu-rich phases are formed in the grain boundary area of the alloy matrix and are evenly distributed in the grain boundary area in a nano-particle shape, the pinning strength of domain walls in the grain boundary area is improved, the coercive force is improved, and the magnetic field of the magnet is improved. Therefore, synchronous improvement of residual magnetism and coercive force of the samarium-cobalt permanent magnet material is ensured.

The invention provides a Joule heating aging treatment method for a samarium cobalt-based rare earth permanent magnet material, and relates to the technical field of rare earth permanent magnet materials. The Joule heating aging treatment method of the samarium-cobalt-based rare earth permanent magnet material comprises the steps of cast ingot preparation, crushing powder preparation, forming and solution treatment, Joule heating aging treatment and cooling treatment. According to the method, the samarium-cobalt permanent magnet material is rapidly processed by Joule heating strong pulse current, atom migration and agglomeration are inhibited, high-density vacancy defects and dislocations are reserved, cell wall phase nucleation is promoted, the heat preservation time is greatly shortened, and the efficiency is improved and the cost is reduced by several times. The prepared material is uniform and fine in nano cellular structure, the key magnetic performance reaches the commercial level or even better, the process is simple, the method is suitable for industrial production, and the good application prospect is achieved.

The present invention belongs to the technical field of rare earth permanent magnet materials and relates to a samarium cobalt permanent magnet and a preparation method thereof. While maintaining good magnetic properties, the present invention significantly improves the toughness and impact resistance of the samarium cobalt permanent magnet by adding only 0.5-2% of Cu. Homogenization of the cast sheet at 1000-1100°C improves grain size and component segregation, making it easier to crush during the subsequent pulverizing process, ensuring the consistency of the crushed powder and further guaranteeing the excellent magnetic properties of the final samarium cobalt permanent magnet.

A vertical sliding shaft located in the middle is arranged in a box body, transverse plates are arranged on the two sides of the sliding shaft respectively, the sliding shaft is connected with a longitudinal rotating plate in a sliding mode, the rotating plate is provided with a sliding hole for the sliding shaft to vertically penetrate through, containing grooves are formed in the two sides of the rotating plate respectively, and transparent plates are arranged on the front side and the rear side of each containing groove respectively. Fixing blocks are arranged at the positions, located above the transverse plate, of the two inner side walls of the box body respectively, pressing blocks are arranged above the fixing blocks, clamping columns vertically penetrating through the fixing blocks are arranged at the bottom ends of the pressing blocks, springs located on the two sides of the clamping columns respectively are arranged between the pressing blocks and the fixing blocks, and connecting blocks are arranged at the bottoms of the front side and the rear side of the rotating plate respectively. According to the utility model, the magnetic steel can be orderly placed in the material box through the placing grooves arranged at the two sides of the rotating plate, so that the management of the magnetic steel in the production process is facilitated, for example, the number and the position of the magnetic steel can be accurately known in the preparatory work before the sintering process, and the subsequent operation flow arrangement is facilitated.

This utility model discloses a fire hose fastening coupling, including a male connector and a female connector. The male connector has a tapered guide head at its end, with a samarium cobalt permanent magnet with a semi-circular notch embedded in its end face and connected to a sliding handle. The sliding handle passes through an L-shaped track groove. The female connector has a reverse magnet embedded in its inner wall and a guide groove. When connecting, the opposite pole magnet automatically corrects the notch. After insertion, the sliding handle is rotated 90° and pulled down, and the locking block is engaged in the recess to form a mechanical self-lock. The horizontal position of the sliding handle prevents loosening due to gravity. When unlocking, the sliding handle is pushed up and rotated to reset. The magnetic blind connection is accurate, the springless electromechanical structure requires no maintenance for life, the samarium cobalt magnet does not fail at -50℃, and the drainage hole and self-cleaning scraper ensure reliable operation in icy, snowy, and muddy environments. It is comprehensively superior to traditional fire hose couplings, redefining the reliability standard of fire hose couplings with three major breakthroughs: magnetic correction for faster blind connection, mechanical reverse hook for absolute anti-detachment, and no electromechanical components requiring no maintenance for life.

The utility model relates to the technical field of faucets, in particular to a faucet with a water quality detection function, which comprises a faucet body, a detection tube fixedly mounted on the faucet body, a stainless steel lifting frame slidably mounted in the detection tube, and rubber pads symmetrically and fixedly mounted at two ends of the stainless steel lifting frame. A samarium-cobalt permanent magnet piece is fixedly installed at the top end of the stainless steel lifting frame, a spring is fixedly installed in the detection pipe, an electromagnet is fixedly installed in the faucet body, and a control box is fixedly installed in the faucet body. The faucet body is communicated with the detection pipe, the spring is located at the bottom end of the stainless steel lifting frame, the samarium-cobalt permanent magnet piece corresponds to the electromagnet, the stainless steel lifting frame slides up and down by switching on and switching off the electromagnet, the TDS probe is controlled to make contact with water, and the effect that the TDS probe rusts to affect the water quality due to the fact that the TDS probe is located in a humid environment for a long time is avoided. And the service life of the equipment is prolonged.

This invention relates to the field of rare earth samarium cobalt magnetic material sample preparation technology, specifically to a method and assembly device for preparing standard samples of rare earth magnetic declination; by setting up a correction pressing component and a jig disk component, the calibration block substrate is installed in the center of the non-magnetic material shell; this invention solves the technical problem of how to assemble the calibration block substrate in the exact center of the non-magnetic material shell during the assembly process of small and large standard samples.

The invention relates to a hybrid permanent magnet motor with damping holes and stator and rotor auxiliary grooves, and belongs to the technical field of permanent magnet synchronous motors. A VV-shaped built-in rotor structure is adopted, the damping holes are designed in the rotor structure to reduce torque pulsation and improve output torque, the auxiliary grooves are designed in a stator, and therefore the torque pulsation can be reduced; damping holes are formed in the rotor for trimming so as to reduce the cogging torque of the motor, the permanent magnet is formed by mixing samarium cobalt and neodymium iron boron, and the rotor is arranged in a segmented skewed pole mode. Multi-objective optimization is carried out on a plurality of key structure parameters, a Pareto optimal solution set is obtained by using a non-dominated sorting genetic algorithm (NSGA-II), and further optimization of motor average torque improvement and torque ripple suppression is realized. The motor disclosed by the invention has excellent demagnetization resistance and high torque density under a high-temperature working condition, meanwhile, torque ripple and harmonic distortion are effectively reduced, and the motor is suitable for high-performance application occasions such as an electric vehicle driving system and the like.

The invention provides a preparation method and application of a samarium-cobalt-based composite wave-absorbing material, by utilizing the method, tetraethyl silicate and ammonia water are added during ball milling to obtain samarium cobalt coated with silicon dioxide, rhenium sulfide grows on the surface of the samarium cobalt coated with the silicon dioxide through a hydrothermal method to obtain Sm2Co17 / Co9S8-coated SiO2-coated ReS2, and after silicon dioxide is coated and sulfide is introduced, the Sm2Co17 / Co9S8-coated SiO2-coated ReS2 is prepared into the samarium-cobalt-based composite wave-absorbing material. The electromagnetic parameters of the samarium cobalt are adjusted, the dielectric property is improved, and the samarium cobalt coated with the silicon dioxide can better prevent the vulcanization phenomenon of the samarium cobalt during growth of rhenium sulfide. Compared with traditional samarium cobalt, the material synthesized by the method has the advantages that the matching thickness is obviously reduced, the effective bandwidth is obviously increased, the minimum reflection loss is also obviously enhanced, and the material has good microwave absorption performance.

To provide a preparation method of a samarium-cobalt permanent magnet with high mechanical properties which not only improves the magnetic properties, but also greatly enhances the mechanical properties of the samarium-cobalt magnet, achieving a synergistic improvement in the magnetic and mechanical properties of the samarium-cobalt magnet.SOLUTION: A method includes the steps of performing melting, pulverizing, orientation shaping, cold isostatic pressing, sintering, solution, aging and heat treatment sequentially on raw materials to obtain a samarium-cobalt permanent magnet. The heat treatment is performed under a protection of an inactive atmosphere. The number of heat treatment cycles ranges from 1 to 10, and an external magnetic field and an external stress are applied during one or multiple heat treatment cycles. The magnetic field intensity of the external magnetic field is 1-50 kOe, and the magnitude of the external stress is 5-500 MPa. Compared to the traditional process, this method not only improves the magnetic properties, but also greatly enhances the mechanical properties of the samarium-cobalt magnet by performing the heat treatment with the external magnetic field and the external stress after the aging process is finished., achieving a synergistic improvement in the magnetic and mechanical properties.SELECTED DRAWING: Figure 1

This invention provides a method for preparing samarium cobalt-based permanent magnets based on grain boundary diffusion of rare earth-copper alloys, relating to the field of permanent magnet materials technology. The invention first involves mixing Sm, Co, Fe, Cu, Zr, and optionally one or two of Ti and Hf, and then subjecting the mixture to melting, casting, powdering, magnetic field orientation pressing, cold isostatic pressing, sintering, solution treatment, and rapid cooling to obtain a solid-solution samarium cobalt-based sintered body A. Then, RE-Cu alloy powder B is coated onto at least one surface of the solid-solution samarium cobalt-based sintered body A, followed by composite aging treatment to obtain the samarium cobalt-based permanent magnet. This invention utilizes the low-melting-point or softened transient liquid phase formed by the RE-Cu alloy powder in the early stages of aging, which preferentially wets the grain boundaries and grain edge regions of the solid-solution SmCoFeCuZr-based sintered body, allowing Cu and a small amount of RE to rapidly diffuse along the grain boundaries, demonstrating promising application prospects.

The invention discloses a large-orientation-size samarium-cobalt magnet and a preparation method thereof, and belongs to the technical field of magnetic materials. The technical problem that an existing method cannot achieve better magnetic performance and lower cracking rate while guaranteeing the large orientation size (larger than or equal to 95 mm) is solved. The preparation method of the large-orientation-size samarium-cobalt magnet comprises the following steps: S1, smelting to prepare powder; s2, powder mixing and pressing are conducted, and a samarium cobalt blank is obtained; s3, the obtained samarium cobalt blank is subjected to sintering treatment and solution treatment; and S4, aging treatment is carried out, and the large-size oriented samarium-cobalt magnet is obtained after aging treatment. The orientation size of the samarium-cobalt magnet prepared by the method is more than 95 mm, and the maximum magnetic energy product is more than 28.23 MGOe.

This invention discloses a method for preparing high-resistivity, high-mechanical-strength sintered samarium-cobalt permanent magnets. The main steps of this method are as follows: samarium-cobalt alloy is subjected to air jet milling, and ultrafine magnetic powder A0, base material B0, and qualified magnetic powder CO generated during the air jet milling process are collected separately; the ultrafine magnetic powder A0 is controlled-actuated to obtain magnetic powder A1; the base material B0 is sequentially hydrogenated and air jet milled to obtain magnetic powder B2; magnetic powder A1, magnetic powder B2, and qualified magnetic powder CO are mixed uniformly to obtain mixed magnetic powder D; the mixed magnetic powder D is oriented and shaped to obtain a samarium-cobalt green blank E, and then the samarium-cobalt green blank E is made into a sintered samarium-cobalt permanent magnet. The sintered samarium-cobalt magnets prepared by this method simultaneously possess high resistivity and high mechanical strength, and fully utilize the two residual powders—ultrafine powder and base material—generated during the samarium-cobalt alloy air jet milling process, thereby improving the yield of samarium-cobalt alloy air jet milling powder, increasing resource utilization, and reducing production costs and energy consumption.

The invention relates to the field of laser cutting, in particular to samarium cobalt permanent magnet material laser cutting equipment and method.The samarium cobalt permanent magnet material laser cutting equipment comprises a rectangular frame, a feeding groove is formed in one side of the rectangular frame, a guide rail extending out of the feeding groove is arranged in the rectangular frame, a bearing frame located in the rectangular frame is slidably mounted on the guide rail, and mounting grooves are symmetrically formed in the two sides of the bearing frame; a mounting groove is formed in the rectangular frame, a strip-shaped plate is mounted on the mounting groove, a laser cutting device is mounted in the rectangular frame, a magnetizing device is mounted in the rectangular frame, a circular groove is formed in the strip-shaped plate, a supporting unit and a supporting end are mounted in the circular groove, and an air blowing assembly is arranged on the outer side of the rectangular frame. The lifting sequence and mode of the supporting ends can be flexibly adjusted according to the cutting specification of a magnetic plate, so that each magnetic block can be independently supported after being cut, staggered separation is achieved, the air blowing assembly can thoroughly remove cutting chippings conveniently, and the cutting machining precision of the samarium-cobalt permanent magnet material is effectively improved.

The utility model discloses an ultra wide band multi-nested microstrip two-section circulator, which comprises a base, a ceramic substrate, a microstrip circuit, ferrite, a ferrite substrate, a ceramic gasket and a samarium cobalt permanent magnet, the ferrite substrate is nested in a hole groove in the ceramic substrate through a nesting process to form a whole, the ceramic substrate is welded on the base through welding flux, the microstrip circuit is arranged on the upper surface of the ferrite substrate, the ceramic gasket is arranged on the microstrip circuit, and the samarium-cobalt permanent magnet is arranged on the ceramic gasket; the circulator is simple in structure, is suitable for surface mounting and microcircuit integration, and has the obvious advantages of good consistency, batch production, miniaturization and wide frequency band compared with a traditional circulator.

The invention discloses a reverse salient pole permanent magnet auxiliary synchronous reluctance motor with a composite magnetic barrier. The motor adopts a 54-slot 8-pole matched double-layer distributed stator winding. The rotor is of a reverse salient pole structure and is provided with eight semicircular salient poles protruding towards the circle center. Two layers of arc-shaped magnetic barriers facing the stator are arranged in each salient pole, the middle part of the inner-layer magnetic barrier is broken, and the outer-layer magnetic barrier is continuous; a rectangular permanent magnet containing groove is formed between every two adjacent salient poles, and a mixed permanent magnet formed by stacking neodymium iron boron and samarium cobalt permanent magnets is placed in each groove. Irregular circular magnetic barriers are arranged at the two ends of the accommodating groove and are connected with the two ends of the inner-layer disconnected magnetic barrier; 54 circular cooling channels are uniformly distributed in the stator yoke part and the rotor in the circumferential direction. Through the unique composite magnetic barrier and reverse salient pole rotor topology, the hybrid permanent magnet and the double-circulation cooling system, a magnetic circuit and a thermal circuit are cooperatively optimized, the salient pole rate, the torque density and the power factor of the motor are effectively improved, the torque pulsation is remarkably inhibited, and the heat dissipation performance and the demagnetization tolerance are enhanced.

This invention belongs to the field of flexible magnetic materials technology, specifically relating to a flexible magnetic material, its preparation method, and its application. The flexible magnetic material comprises the following components in parts by weight: 80-90 parts magnetic powder, 10-15 parts binder, 1-2 parts plasticizer, 0.4-0.9 parts vulcanizing agent, and 0.5-1.0 parts antioxidant; the magnetic powder is selected from at least one of modified NdFeB magnetic powder, ferrite, samarium iron nitrogen, and samarium cobalt; the modified NdFeB magnetic powder is prepared by modification with bis[3-(triethoxysilyl)propyl]tetrasulfide; the binder comprises NBR rubber A, NBR rubber B, and natural rubber in a mass ratio of (1.3-1.5):(0.4-0.6):(0.8-1.0). The flexible magnetic material of this invention possesses both excellent magnetic and mechanical properties, and exhibits good stability.