1376 results about "Ferrite (magnet)" patented technology

A double cold rolled non-oriented electrical steel sheet having a composition including: 0.0001%≤Carbon≤0.007%, 0.1%≤Manganese≤0.2%, 3.1%≤Silicon≤3.6%, 0.8%≤Aluminum≤1.1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition being iron and unavoidable impurities caused by processing, the microstructure is made of ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, is from 35% to 45% when calculated in accordance of Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.64 T to 1.66 T.

A double cold rolled non-oriented electrical steel sheet having a composition including, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.15%≤Manganese≤0.3%, 3.2%≤Silicon≤3.8%, 0.8%≤Aluminum≤1.1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition being iron and unavoidable impurities caused by processing, the microstructure is made of ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, less than 30% when calculated in accordance of Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.66 T to 1.69 T.

The invention provides a frequency tripling circulator and electronic equipment, and the frequency tripling circulator comprises a grounding plate, a composite substrate located above the grounding plate, and an upper metal layer located on the composite substrate, the composite substrate comprises a ceramic substrate, and the surface of the ceramic substrate is provided with a through inner ferrite; the outer side of the inner ferrite is sequentially sleeved with a plurality of annular outer ferrites, and the saturation magnetization intensity of the inner ferrite and the saturation magnetization intensity of the outer ferrites are sequentially reduced from inside to outside; the upper metal layer comprises a central junction, the central junction is provided with three end points, each end point is connected with one port of the circulator through a metal transmission path, and the side edge of the central junction is provided with a plurality of SSPP grooves between two adjacent end points to form SSPPs branches. The scheme can have the characteristics of miniaturization and broadband, thereby satisfying more application scenes.

A non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%,, 0.15% ≤Manganese≤0.2%, 3%≤Silicon≤3.6%, 0.7%≤Aluminum≤1.3%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, with 3.85%≤Si+Al+Mn ≤5.5%, and can contain various optional elements, the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel sheet being made of ferrite and including in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, of 35 to 55% when calculated in accordance with Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.635T to 1.670T.

The invention belongs to the field of microwave communication, and relates to a double-frequency microstrip circulator based on multi-layer material nesting, and the circulator comprises a substrate, a magnetic conductive sheet, a high dielectric ceramic, a high dielectric constant ferrite ring, a high magnetic saturation ferrite, a circuit layer, a ceramic sheet, and a permanent magnet. The magnetic conductive sheet is arranged at the bottom of the base body, the high-dielectric ceramic is arranged on the magnetic conductive sheet, the high-dielectric-constant ferrite ring is annularly embedded in the high-dielectric-constant ceramic, and the high-magnetic-saturation ferrite is embedded in the high-dielectric-constant ferrite ring. The circuit layer is arranged on the substrate consisting of the high dielectric ceramic, the high dielectric constant ferrite ring and the high magnetic saturation ferrite, the ceramic chip is arranged on the circuit layer, and the permanent magnet is arranged on the ceramic chip. The overall size is small, weight is light, and reliability is high; the working frequency range is wide, through different transformations, the system is not easily detected by enemies, the confidentiality is high, and the anti-interference capability is strong; the method can be widely applied to the fields of mobile communication, satellite communication, radar detection, electronic countermeasures and the like.

A double cold rolled non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.1%≤Manganese≤0.3%, 3.1%≤Silicon≤3.8%, 0.6%≤Aluminum≤0.8%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition is iron and unavoidable impurities caused by processing. The microstructure ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, of 40 to 50% when calculated in accordance with Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.66T to 1.7T.

The invention provides a composite ferrite circulator and electronic equipment, the composite ferrite circulator comprises a first bias magnetic circuit assembly, a ceramic gasket, a composite material substrate and a second bias magnetic circuit assembly which are sequentially arranged along a first direction, and one side, close to the ceramic gasket, of the composite material substrate is provided with a microstrip circuit; one side, close to the second bias magnetic circuit assembly, of the composite material substrate is provided with a grounding metal layer, the composite material substrate comprises a ceramic dielectric substrate, the surface of the ceramic dielectric substrate is provided with a cylindrical ferrite penetrating along the first direction, and the outer side of the cylindrical ferrite is sequentially sleeved with a plurality of circular ring ferrites; the saturation magnetization intensity of the cylindrical ferrite and the saturation magnetization intensity of the circular ferrite are sequentially reduced from inside to outside. According to the scheme, a higher relative bandwidth of the circulator can be realized, and the non-reciprocal transmission performance of the circulator is improved, so that the overall working performance of the electronic equipment is improved.

According to the preparation method and application of the metal soft magnetic composite material, the surface of the metal soft magnetic powder is coated with the metal oxide insulating layer through the ALD technology, then the characteristics that the ferrite phase layer is high in resistivity, low in loss and good in high-frequency characteristic are utilized, insulating coating is conducted on the surface through the ALD technology, and the metal soft magnetic composite material is obtained. And a ferrite coating layer is formed on the surface of the metal soft magnetic powder during high-temperature annealing, so that electric contact among particles is blocked, the resistivity of the soft magnetic material is improved, and the eddy-current loss at high frequency is reduced, thereby improving the high-frequency performance.

The invention relates to the technical field of magnetic materials, in particular to a ferrite neodymium iron boron composite magnetic material and a preparation method thereof. The ferrite neodymium iron boron composite magnetic material comprises the following raw materials in parts by weight: 20-30 parts of ferrite magnetic powder, 40-50 parts of neodymium iron boron magnetic powder, 5-10 parts of silicon dioxide, 2-5 parts of carbon nanotubes, 0.5-1 part of polyethylene and 0.5-2 parts of polyimide. The high-temperature-resistant and corrosion-resistant permanent magnet has high magnet performance and also has high-temperature-resistant performance and corrosion-resistant performance.

The invention discloses a C-band ultralow-loss self-bias hexagonal gyromagnetic ferrite material, and belongs to the technical field of ferrite material preparation. The ferrite material comprises a BiCaZrVIn-YIG gyromagnetic ferrite material and a LaScBiCu-BaM hexagonal gyromagnetic ferrite material, wherein the weight ratio of the BiCaZrVIn-YIG gyromagnetic ferrite material to the LaScBiCu-BaM hexagonal gyromagnetic ferrite material is 0.1 to 10; the doping agent accounts for the weight percentage of the ferrite material, and the doping agent comprises the following components in percentage by weight: 0.3-0.7 wt% of La2O3, 0.4-0.8 wt% of SiO2 and 0.5-0.9 wt% of SrTiO3. According to the invention, LaScBiCu-BaM hexagonal gyromagnetic ferrite with high Mr / Ms and Hc characteristics is grown on the surfaces of low-loss BiCaZrVIn-YIG gyromagnetic ferrite particles, and a hexagonal gyromagnetic ferrite material with high and adjustable anisotropic field Ha, high coercive force Hc and residual magnetism ratio Mr / Ms, ultralow ferromagnetic resonance line width H and dielectric loss tan delta epsilon characteristics is developed. And the engineering requirements of low loss and wide bandwidth of the C-band miniature integrated device are met.

The invention relates to a high-permeability ultralow-coercive-force soft magnetic stainless steel heat treatment process which comprises the following steps: in a nitrogen atmosphere, firstly heating a hot-rolled wire rod to 900-950 DEG C at a heating rate of 30-50 DEG C / h, preserving heat for 4-6 hours to obtain a fine grain structure of equiaxial recrystallization ferrite, then cooling to room temperature at a cooling rate of less than or equal to 15 DEG C / h to homogenize the ferrite structure, and finally cooling to room temperature at a cooling rate of less than or equal to 15 DEG C / h to obtain the high-permeability ultralow-coercive-force soft magnetic stainless steel. The soft magnetic stainless steel is obtained. The method has the advantages that the maximum magnetic conductivity of the soft magnetic stainless steel is improved, the coercive force of the soft magnetic stainless steel is reduced, and the plasticity index of the soft magnetic stainless steel is improved.

The invention discloses an intelligent hanging and conveying device for manganese zinc ferrite core vibration grinding materials, and relates to the technical field of conveying, the intelligent hanging and conveying device comprises a conveying box, a hanging frame is fixedly installed on the surface of the conveying box, a feeding pipe is fixedly installed on the surface of the conveying box, a discharging port is fixedly installed on the surface of the conveying box, and a motor is fixedly installed on the outer wall of the conveying box; a transmission belt is installed on the surface of the transmission roller in a transmission mode, a material supporting plate is fixedly installed on the surface of the transmission belt, a sliding groove is formed in the top of the material supporting plate, a sliding block is slidably installed on the inner wall of the sliding groove, a push plate is fixedly installed on the top of the sliding block, and a guide groove is formed in the surface of the material conveying box; the elastic telescopic rod moves upwards to drive the rotating wheel to move upwards, the rotating wheel is pushed to enter the guide groove under the elasticity of the elastic telescopic rod in the upward moving process, and the rotating wheel moves in the direction of the guide groove.

The invention relates to an air fryer with a bottom IH coil heating plate, and aims to solve the technical problems that the existing similar air fryer with upper and lower heating pipes is poorer in bottom heating temperature stability and more difficult to control, and meanwhile, the steam heating structure design and the inner pot putting induction detection structure design are too complicated and the production cost is higher. The air fryer is characterized in that an IH coil heating plate is arranged at a metal heat insulation layer at the bottom of the lower portion of an inner pot of the air fryer, a grill is arranged in the inner pot, the inner pot is a non-magnetic pot body or a ferrite pot body, and the grill is a ferrite grill; the baking tray is aligned with the IH coil heating tray below, and the grill in the inner pot is heated by the magnetic induction of the IH coil heating tray through the inner pot; when the inner pot is a non-magnetic pot body, a glass layer is arranged at the hollow part in the middle of the inner bottom of the inner pot; meanwhile, the IH coil heating disc serves as a microswitch, and whether the inner pot of ferrite is placed or not is sensed through the magnetic field generated by the IH electromagnetic module before use.

The invention relates to the technical field of microwave ferrite devices, and discloses a double-section microstrip circulator which comprises a magnetic conductive sheet, a ferrite gyromagnet and a resistor, the ferrite gyromagnet and the resistor are arranged on the upper surface of the magnetic conductive sheet, a circuit is additionally arranged on the upper surface of the ferrite gyromagnet, and the circuit is connected with a microstrip filter; the ceramic chip is arranged on the upper surface of the circuit, and samarium cobalt is additionally arranged at the top end of the ceramic chip, according to the two-section microstrip circulator, through the arrangement of a combined structure of the magnetic conductive sheet, the ferrite gyromagnet, the circuit, the microstrip filter, the ceramic chip, the samarium cobalt and the resistor, the isolation degree can be effectively improved, and the requirement of a system for high isolation is met; the microstrip filter in circuit connection can improve the second harmonic characteristic and improve the problem that the second harmonic of a conventional microstrip circulator is poor; the ferrite gyromagnet is used as a gyromagnet material, and is combined with a double-section circuit, so that the characteristic of low emission loss can be realized, and the circulator is small in size, light in weight and relatively high in reliability due to the integral structural design.

The invention discloses an electromagnetic shielding method for a high-density integrated wireless audio module, and the method comprises the steps: employing a metal material with good conductivity and corrosion resistance, such as aluminum alloy and copper alloy, to cover the outer surface of the module, and enabling the outer metal shielding layer to be used for isolating external electromagnetic interference; the thickness of the outer metal shielding layer is generally 0.3 mm to 1 mm, it is ensured that external electromagnetic radiation can be effectively reflected or absorbed, and the outer metal shielding layer is located between the outer metal shielding layer and the inner conductive coating and is made of a material with high-frequency absorption performance, such as a ferrite material, a conductive polymer or a carbon-based material. The thickness of the wave-absorbing layer can be designed according to the electromagnetic characteristics of a working frequency band and is generally 0.5 mm to 2 mm, so that high-frequency noise can be effectively attenuated. By adopting a multi-layer shielding structure and an intelligent heat dissipation design, electromagnetic interference is effectively reduced, miniaturization and light weight of the wireless audio module are maintained, and compared with the prior art in which a large number of expensive shielding materials are needed, the wireless audio module has the advantages that the selection of the shielding materials and the intelligent heat dissipation design are optimized.

The invention relates to the technical field of solid waste recycling and functional building materials, in particular to a wave-absorbing wall material based on a waste glass fiber wind power blade and a preparation method of the wave-absorbing wall material. The wave-absorbing wall material based on the waste glass fiber wind power blade is mainly prepared from the following raw materials in parts by mass: 60-68 parts of waste glass fiber wind power blade granules, 30-35 parts of silicon-aluminum solid wastes, 2-5 parts of a wave-absorbing reinforcing agent and 6-10 parts of water. According to the invention, waste wind power blades and silicon-aluminum solid wastes are used as raw materials, a high-strength porous carbon skeleton structure is formed in the material through a vacuum pugging molding and vacuum sintering process, and meanwhile, a ferrite wave-absorbing reinforcing agent is mixed to form a composite wave-absorbing electromagnetic structure of a carbon aggregate-dielectric loss material and a ferrite particle-magnetic loss material; collaborative optimization of the electromagnetic wave absorption performance and the material mechanical property is achieved, and good ecological value and economic benefits are achieved.

The invention belongs to the technical field of magnetic material preparation, and particularly relates to permanent magnetic ferrite and a preparation method and application thereof. The preparation method of the permanent magnetic ferrite provided by the invention comprises the following steps: (1) mixing iron scale subjected to heat treatment with strontium carbonate, and carrying out dry vibration ball milling and pre-sintering to obtain pre-sintered powder; wherein the temperature of the heat treatment is 700 to 900 DEG C; and (2) mixing the pre-sintered powder with a first additive, and sintering. The residual magnetism (Br), the magnetic induction coercive force (Hcb), the intrinsic coercive force (Hcj) and the maximum magnetic energy product ((BH) max) of the prepared permanent magnetic ferrite are relatively high.

The invention provides a YIG ferrite material with high dielectric constant and high saturation magnetization and a preparation method thereof, and belongs to the field of microwave ferrite materials, the chemical formula of the YIG ferrite material is BiaCabY3-a-bZrbSncZncFe5-b-2c-delta O12, 1.2 < = a < = 1.5, 0 < = b < = 0.6, 0 < = c < = 0.5, delta is iron deficiency, 0 < = delta < = 0.3, the dielectric constant of the YIG ferrite material is 30-35, and the saturation magnetization is 1800-2000 Gs. The YIG ferrite material provided by the invention is simple in preparation method, can be used in miniaturized microwave devices, and can meet the requirements of miniaturization and light weight of 5G base station circulators.

A magnetoelectric multiferroic nanocomposite. The nanocomposite comprises a ferroelectric perovskite oxide and a rare-earth substituted mixed ternary transition metal ferrite of the formula A1−xBxRyFe2−yO4. The nanocomposite has a high dielectric constant, low dielectric loss, both stable over a wide frequency range. These properties may make the nanocomposite desirable for applications in microelectronic devices, sensors and antennas.

The invention relates to a large-size double-layer splicing type ferrite magnetic shielding structure, in particular to a low-noise magnetic shielding barrel structure which is particularly suitable for an ultra-high sensitive magnetic field and inertial measurement device and miniaturization integration application of the ultra-high sensitive magnetic field and inertial measurement device. The magnetic shielding barrel is manufactured by splicing single large-size ferrite blocks into a double-layer cylinder. And the seam at the splicing part of the inner layer is blocked by the ferrite on the outer layer, so that the splicing does not generate large magnetic flux leakage. The double-layer configuration improves the shielding coefficient and reduces the magnetic noise at the same time. The novel large-size double-layer splicing type ferrite magnetic shielding structure shielding barrel is simple in processing technology, the shielding effect is not affected while the material cost is saved, the magnetic noise is reduced through the double-layer barrel structure, and the defect that the magnetic noise caused by a traditional single-layer ferrite magnetic shielding barrel cannot be further reduced is overcome.

A non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.18%≤Manganese≤0.5%, 3.1%≤Silicon≤3.8%, 0.7%≤Aluminum≤1.3%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, with 3.85%≤Si+Al+Mn≤5.5%, and can contain various optional elements the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel sheet being made of ferrite and including in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, less than 34% when calculated in accordance with Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.60 T to 1.65 T.

The invention discloses a less-rare-earth permanent magnet motor rotor, which comprises an annular rotor iron core (multiple layers of silicon steel sheets are axially laminated, and the outer diameter is D), and 2N magnetic poles (N is greater than or equal to 1) are uniformly and alternately arranged in the circumferential direction and have opposite polarities. Each magnetic pole comprises a first magnetic steel (the length direction is a q axis, and a d-axis area is separated) radially embedded into the rotor core, and an asymmetric permanent magnet structure positioned in the d-axis area, and the asymmetric permanent magnet structure can be (1) an asymmetric V-shaped structure formed by second and third magnetic steels (the included angle is 120-170 degrees, and the vertex is positioned at the rotating near end); (2) a double-I structure composed of a second magnetic steel and a fourth magnetic steel; and (3) a triangular structure formed by the second, third and fourth magnetic steels. Wherein the second magnetic steel is ferrite magnetic steel and is arranged at the rotating far end of the magnetic pole, the third magnetic steel and the fourth magnetic steel are rare earth magnetic steel and are located at the near end and the d axis, and all the magnetic steel are magnetized in the tangential direction and are isolated by the iron core. According to the structure, the use amount of rare earth is reduced, the torque output of unit rare earth is improved by optimizing a magnetic circuit, and the performance and the cost are both considered.

The invention discloses a preparation method of a wear-resistant magnetic composite nano ferroferric oxide material, and belongs to the technical field of nano ferroferric oxide materials.The preparation method comprises the steps that coated modified ferroferric oxide composite powder, silver nitrate and absolute methanol are added into a reaction kettle, stirring and ultrasonic dispersion are conducted, then 2-aminoterephthalic acid is added, stirring and mixing are conducted, and a mixture is obtained; and after the reaction, separating to obtain the wear-resistant magnetic composite nano ferroferric oxide material. The wear-resistant magnetic composite nano ferroferric oxide material prepared by the preparation method disclosed by the invention overcomes the problem that an existing ferrite material is relatively single in electromagnetic loss mechanism in the aspect of nickel-phosphorus plated fabric, and the electromagnetic shielding effectiveness of the fabric is improved; the coated modified ferroferric oxide composite powder has good dispersity, a polydopamine coating layer on the surface of the coated modified ferroferric oxide composite powder improves the anchoring effect on silver MOF particles through a mussel-like adhesion interface, meanwhile, stress is dispersed and crack propagation is reduced through the buffering effect of the polydopamine coating layer, and the mechanical stability of the wear-resistant magnetic composite nano ferroferric oxide material is improved.

The invention relates to the technical field of soft magnetic ferrite materials, and particularly discloses a NiCuZn-MgO composite material and a preparation method thereof. The NiCuZn-MgO composite material comprises main components and additives, and the main components comprise the following components in percentage by weight: 36-72 wt% of Fe2O3, 13-16 wt% of ZnO, 6-9 wt% of NiO, 3-6 wt% of MgO and the balance of CuO; based on the total weight of the main components, the additive comprises the following components in percentage by weight: 0.5 to 1.5 weight percent of Bi2O3, 0.3 to 1.5 weight percent of SiO2 and 0.3 to 1.5 weight percent of CaO. According to the NiCuZn-MgO composite material prepared by the invention, the cost of soft magnetic ferrite can be reduced, and the NiCuZn-MgO composite material has high magnetic conductivity and high Bs.

A Hall current sensor, comprising: a magnetic core (10), wherein an air gap (11) is formed in one side of the magnetic core (10); a Hall element (12), wherein the Hall element (12) is disposed in the air gap (11); and a ferrite structure, wherein the ferrite structure is disposed in the air gap (11), and the ferrite structure clamps the Hall element (12) in the air gap (11), so as to reduce the air gap of a magnetic circuit and keep the Hall element (12) perpendicular to the direction of a magnetic induction line in the air gap (11). The Hall current sensor can significantly improve the detection precision, anti-interference capability and position error resistance capability of open-loop and closed-loop magnetic sensors in leakage current, small current and other weak magnetic scenarios, thereby realizing low-cost, high-precision and fast-response current sensing.

The invention provides NiCuZn ferrite with high magnetic conductivity and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out primary ball milling on raw materials of the NiCuZn ferrite, and pre-sintering to obtain a pre-sintered material; and (2) the pre-sintered material and a doping agent are subjected to secondary ball milling, and after granulation, molding and sintering, the NiCuZn ferrite is obtained, and the doping agent comprises WO3 and TiO2. Through combined doping of WO3 and TiO2, the sample density can be improved, the magnetic conductivity, the Curie temperature and the saturation flux density can be improved, meanwhile, the magnetic loss is reduced, and the final ferrite can be suitable for electronic elements with high requirements for the magnetic conductivity.

The invention relates to the technical field of ferrite magnetic steel production and preparation, in particular to a preparation device and a preparation method of tough high-performance ferrite magnetic steel, the preparation device comprises a plate frame, and the top of the plate frame is provided with a fragmentation mechanism. The invention provides a preparation device of tough high-performance ferrite magnetic steel, which has a multi-stage crushing function, accurately controls coarse crushing to fine crushing, ensures that the granularity of raw materials is uniform and fine, provides a stable raw material basis for subsequent procedures, deeply removes iron, reduces the content of iron impurities to be extremely low, ensures high purity and excellent electromagnetic performance of the magnetic steel, and is suitable for industrial production. An efficient and powerful stirring and mixing structure is arranged, the mixing efficiency and uniformity of raw materials and additives are promoted to be greatly improved, preheating and vibrating functions are integrated, the materials are heated through intelligent temperature control, and therefore the viscosity is reduced, the fluidity is improved, pre-pressing forming is assisted, and due to the vibrating function, agglomerates are scattered when the materials are conveyed, and the component uniformity is optimized; the omnibearing assistance magnetic steel achieves the advantages of toughness and high performance standard.

The invention discloses a hybrid excitation electric roller direct drive motor, and relates to the technical field of motors, the hybrid excitation electric roller direct drive motor comprises a shell, a shaft is rotatably connected to the center of the shell, and a stator iron core is rotatably connected to the outer wall of the shaft. On one hand, the magnetic resistance torque is fully utilized and the use amount of the permanent magnet is reduced by utilizing the characteristics of the magnetism-assisting synchronous magnetic resistance structure, and on the other hand, ferrite without rare earth and neodymium iron boron containing rare earth are mixed for use by adopting a magnetic mixing technology, so that the use amount of the rare earth permanent magnet can be further reduced, and the use amount of the rare earth permanent magnet can be reduced by about half under the same performance index; and secondly, through reasonable arrangement of the permanent magnets and adjustment of the distribution of the magnetic field, the magnetic circuit design is more optimized, the magnetic field is accurately controlled, and the demagnetization resistance of the ferrite in a reverse magnetic field can be improved.

The invention discloses a ferrite magnetic tile sintering device and an operation method thereof, and relates to the technical field of ferrite magnetic tile sintering, the ferrite magnetic tile sintering device comprises a sintering furnace, a bearing plate used for supporting magnetic tiles and a conveying roller used for conveying the bearing plate, one end of the sintering furnace is provided with a feeding frame, and the ferrite magnetic tile sintering device further comprises a linkage clamping mechanism and a linkage rotating mechanism; the linkage clamping mechanism is arranged on the bearing plate, and the linkage clamping mechanism automatically clamps the magnetic tiles in the transverse moving process of the bearing plate through the conveying rollers. When the conveying rollers convey the bearing plate loaded with the magnetic tiles to enter the sintering furnace, the arranged rolling wheels and the inclined baffles generate the extrusion effect, the linkage pressing rods press the magnetic tiles placed on the supporting frame, automatic clamping and fixing are achieved, and then the rolling wheels roll along the fixed guide rails along with movement of the bearing plate; and the rolling rollers drive the supporting frame fixedly clamping the magnetic tiles to rotate, so that the magnetic tiles rotate automatically in the process of transversely moving and passing through the sintering furnace, and the heating is uniform.

The invention discloses a production line and a production method for processing square blocks into ferrite magnetic discs, comprising a square mold: a press: a bell furnace: a first magnetic material wire cutting machine: a rounding machine: a centerless external circular grinding machine: the centerless external circular grinding machine is placed at the tail of the first magnetic material wire cutting machine, and is used for fine processing of cylindrical blanks, so that the cylindrical blanks are processed into cylindrical parts; a bonding platform: the bonding platform is placed at the tail of the centerless external circular grinding machine, and a plurality of cylindrical parts are placed in a rectangular array in the bonding platform, and the bonding platform is used for bonding the cylindrical parts arranged in the rectangular array into one; a second magnetic material wire cutting machine: the second magnetic material wire cutting machine is placed at the tail of the bonding platform, and is used for cutting the cylindrical parts bonded into one into a plurality of circular discs bonded into one; an immersion separation tank; the present invention uses a set of molds and a tonnage press to realize the processing of magnetic discs of different thicknesses, and has high production efficiency and low cost.