26results about How to "Improve electromagnetic performance" patented technology

The invention discloses a non-oriented electrical steel plate with excellent blanking processing performance, which contains Fe and inevitable impurities, and also contains the following chemical elements in percentage by mass: 0 < C < = 0.004%, 0.8-2.2% of Si, 0.05-0.5% of Mn, 0.005-0.15% of P, 0 < Al < = 0.1%, 0.0003-0.01% of Ca + Ce, and the balance of Fe and inevitable impurities. Wherein the value of Si / 10 is 0.53%-22%. The invention also discloses a manufacturing method of the non-oriented electrical steel plate. The manufacturing method comprises the following steps: smelting and casting; heating and hot rolling; performing cold rolling after pickling; and continuous annealing: the soaking time is controlled to be 5-60 s, and the soaking temperature T is equal to 850 + 11a * {[Si] / (10 * [P])}. According to the non-oriented electrical steel plate and the manufacturing method thereof, the non-oriented electrical steel plate has a proper iron loss coefficient and excellent electromagnetic performance, and meanwhile, the non-oriented electrical steel plate also has good blanking processing performance.

This invention relates to a high-power, low-loss Li-based microwave ferrite for LTCC and its preparation method, belonging to the field of electronic ceramics technology. The ferrite, based on its respective standard components, contains the following content: Li₂CO₃ 11.80–12.24 mol%, ZnO 19.87–20.41 mol%, TiO₂ 10.78–11.08 mol%, Mn₃O₄ 0.39–2.65 mol%, Co₃O₄ 0.04–0.58 mol%, Fe₂O₃ 54.70–56.18 mol%, and Bi₂O₃ 0.09 mol%. This invention introduces high-valence Mn ions into the Li-based microwave ferrite, altering the ferrite grain size distribution, particularly increasing the proportion of fine grains, thus improving the spin linewidth. Based on grain refinement, the introduction of an appropriate amount of Co ions with rapid relaxation characteristics further enhances the ferrite's spin linewidth.

The invention discloses an axial flux permanent magnet synchronous reluctance motor rotor based on modular harmonic counteracting, the rotor is designed in a three-in-one mode of structure modularization, magnetic barrier gradient and phase computable dislocation, a rotor assembly is formed by splicing N fan-shaped rotor modules along the circumference, and the adjacent modules are provided with optimal dislocation angles calculated according to the harmonic counteracting principle. The sum of target harmonic magnetic field vectors generated by each module is zero; a U-shaped magnetic barrier array of which geometric parameters are monotonically changed in a gradient manner is arranged in the fan-shaped rotor module, and a permanent magnet group is embedded in the fan-shaped rotor module; main electromagnetic harmonic waves are offset from the source, magnetism gathering and resistance increasing functions are decoupled, the mechanical robustness and the electromagnetic performance of the motor are improved, meanwhile, overall machining is converted into standardized module assembling, the manufacturing cost and the maintenance difficulty are reduced, different motor pole numbers can be flexibly adapted, and the service life of the motor is prolonged. The method is suitable for high-end application scenes such as new energy automobiles, industrial driving and aerospace.

This invention provides a coreless stator for a high current density axial flux motor and an axial flux motor. The coreless stator of the high current density axial flux motor includes at least one stator winding layer, which includes several circumferentially spaced and independent conductive coil units. In each stator winding layer, several conductive coil units are processed on a conductive substrate using a subtractive process. Each conductive coil unit includes a planar working portion extending straight in a radial plane, an outer transition line portion connected to the outer end of the planar working portion, and an inner transition line portion connected to the inner end of the planar working portion. At least one of the outer transition line portion and the inner transition line portion is bent wholly or partially relative to the planar working portion, thereby forming a three-dimensional transition line portion. This directly releases the radial plane space occupied by the outer transition line portion and the inner transition line portion, thereby significantly increasing the radial width and total area of ​​the effective electromagnetic working area and achieving a significant improvement in torque and power density.

This invention discloses an integrated ultra-wideband absorbing material. From top to bottom, the material comprises a first lossy dielectric substrate, multiple lightweight interlayers, five resistive frequency selective surfaces, a metal backplate, and a composite material frame penetrating between the layers. Through slots are formed between the square rings and concentric geometric patterns of each resistive frequency selective surface. The composite material frame is embedded in these slots and continuously arranged along the thickness direction, creating a non-uniform dielectric structure within the material composed of high-dielectric and low-dielectric regions. This structure jointly regulates the resonance conditions and equivalent impedance gradient of the multiple resistive frequency selective surfaces, shifting the low-frequency absorption initiation frequency towards lower frequencies without increasing the thickness, and maintaining stable absorption performance at large oblique incidence angles. Simultaneously, the composite material frame improves the overall structural mechanical stability. This invention achieves thinness, wide bandwidth, and wide-angle absorption characteristics, making it suitable for electromagnetic stealth and electromagnetic compatibility applications.

The invention relates to an iron-based gyromagnetic material calculated based on a first principle and a screening method thereof, the crystal structure of the material is a garnet structure, and the chemical general formula of the material is Sr < x > Y < 3-x > Scy Fe < 5-y > O < 12 >, the value range of x is 0 lt; xlt; 3, the value range of y is 0 lt; yt; Yt; 5. On the basis of a first principle calculation result, a specific doping combination capable of remarkably improving the dielectric constant and improving the saturation magnetization intensity is screened out, namely, a double-ion co-doping strategy that c site is replaced by Sr and a site is replaced by Sc is adopted. According to the method, experiments are guided through theoretical calculation, the problems that a traditional trial-and-error method is long in period and large in blindness are effectively solved, and the iron-based gyromagnetic material with excellent electromagnetic performance is obtained.

The utility model discloses a metasurface unit for conformal design. The metasurface unit comprises a bottom layer, a first dielectric layer and a metal pattern layer which are stacked in sequence, the metal pattern layer comprises a first metal layer, a first active control element and a second active control element; the first metal layer is provided with a first rectangular hollow hole and a second rectangular hollow hole; a first metal patch is arranged in the middle of the first rectangular hollow hole, and a second metal patch is arranged in the middle of the second rectangular hollow hole; the first metal patch is provided with a first conductive through hole, and the second metal patch is provided with a second conductive through hole; the first metal layer also has a third conductive via. The metasurface unit provided by the utility model has relatively high conformal capability and relatively good electromagnetic performance at the same time.

The invention discloses an iron-silicon-chromium soft magnetic powder material which comprises the following raw materials in percentage by mass: 2-7% of silicon, 2-10% of chromium, 0-5% of nickel and cobalt and the balance of iron, the use amount of nickel and cobalt is greater than 0, and the sum of the use amount of silicon, chromium, nickel, cobalt and iron is 100%. The iron-silicon-chromium soft magnetic powder material is high in powder apparent density and tap density, low in powder oxygen content and high in inductance value and magnetic conductivity, and can meet the high-performance requirements of electronic components on metal soft magnetic alloy powder.

The invention discloses a sectional type rotor structure, and belongs to the technical field of servo motors. The structure comprises a plurality of iron core sections formed by laminating the same kind of rotor punching sheets, and the punching sheets are provided with asymmetrical front surfaces and back surfaces. A first type of iron core sections are formed by laminating with the front faces facing upwards, a second type of iron core sections are formed by laminating with the back faces facing upwards, and the two types of iron core sections are alternately arranged in the axial direction and staggered by a certain angle around the axis. Each iron core section is provided with a positioning part, and two adjacent iron core sections achieve accurate angle positioning and assembly by aligning the positioning parts. According to the invention, the segmented rotor with the dislocation effect can be manufactured by using only one set of mold, so that the cost is greatly reduced; the cogging torque and the electromagnetic noise are effectively weakened through the segmented pole staggering effect, and the operation stability is improved; meanwhile, the permanent magnet is firmly installed, the assembling process is simple and convenient, mistake proofing is achieved, and the consistency and reliability of products are guaranteed.

This invention provides a coreless stator with a high magnetic flux density and a thin working area, and an axial flux motor. The coreless stator includes a first winding unit and a second winding unit stacked axially. Several winding coils of the first and second winding units are fabricated on a conductive substrate using a subtractive process. Each winding coil includes a working area, a hollow slot, and bent outer and inner coil bridging areas. The first and second winding units are circumferentially misaligned during axial stacking, so that the working areas of the first and second winding units are circumferentially spaced and distributed in the same radial plane, forming the stator working section. The thickness of the stator working section does not exceed half the total thickness of the coreless stator. This application further thins the stator working section of the coreless stator, significantly reducing the effective working air gap length of the axial flux motor, significantly enhancing the air gap magnetic flux density, improving the motor's torque density and power density, and achieving synergistic optimization of performance and reliability.

The application relates to the technical field of antennas, in particular to an ultra-wideband reconfigurable one-bit trans-reflection array unit and an antenna. The ultra-wideband reconfigurable one-bit trans-reflection array unit comprises a first dielectric layer, a second dielectric layer and a third dielectric layer arranged in a stacking structure in sequence. A first metal polarization grid is arranged on the top of the first dielectric layer. A second metal polarization grid and a feeding structure are arranged on the bottom of the third dielectric layer. A reconfigurable metal resonator is arranged on the top of the second dielectric layer. The reconfigurable metal resonator is connected with a bias line of the feeding structure through a metal column passing through a metalized through hole. A plurality of switching elements are arranged on the reconfigurable metal resonator. The above scheme integrates the transmission and reflection functions on a single trans-reflection array unit, realizes beam scanning in the whole space range, breaks through the limitation that a traditional space-fed array antenna can only work in a half-space scene, and is favorable for improving the application range of the antenna.

This invention relates to the fields of radio frequency detection and aircraft skin technology, and discloses a conformal skin radar structure based on a radio frequency microsystem. It includes several planar arrays based on the radio frequency microsystem, assembled according to the curvature requirements of aircraft skin to form irregularly shaped arrays. A conformal skin is attached to the surface of each irregularly shaped array, including an outer electromagnetic wave-transmitting protective skin. A filling portion is provided on the side of the protective skin that is in contact with the irregularly shaped array, and the filling portion is inserted into the splicing seam between adjacent planar arrays. This invention utilizes the integrated design of the irregularly shaped outer electromagnetic wave-transmitting protective skin and the irregularly shaped array based on the radio frequency microsystem. While ensuring electrical performance, it achieves conformal design with the aircraft skin, expanding the installation location of radar equipment on aircraft platforms. Furthermore, the structure is simple and compact, lightweight, easy to manufacture, and inexpensive. Moreover, the filling portion ensures the installation stability of the conformal skin and the irregularly shaped array while improving the electromagnetic performance of the combined irregularly shaped array.

This invention provides a copper ring sensing device. The copper ring sensing device includes a PI substrate and copper wires wound onto the surface of the PI substrate. An insulating layer is provided on the surface of the copper wires, and a rubber tube is fitted over the copper wires. The wire width is 0.2 mm. A PI protective film covers the copper wires and is adhered to the PI substrate. The copper ring sensing device provided by this invention solves the technical problems of complex manufacturing processes, long production cycles, and material waste in the production of traditional flexible printed circuit boards, which lead to high costs.

The application provides a radio frequency transceiving fusion circuit, a transceiving front-end chip and a radio frequency heterogeneous microsystem. The radio frequency transceiving fusion circuit comprises: a first bidirectional drive amplifier configured as a radio frequency power amplifier and a low noise amplifier in a radio frequency transmitting process and a radio frequency receiving process; a phase shifter connected with the first bidirectional drive amplifier and configured to adjust a phase of a radio frequency signal; the radio frequency signal comprises a transmitting signal and a receiving signal; and a second bidirectional drive amplifier connected with the phase shifter and configured to mix the radio frequency signal. The application provides a compact and efficient transceiving fusion design technology, which integrates similar modules and devices in a transmitting channel and a receiving channel, reduces the size of the transceiving channel, improves the analog integration level of the chip and improves the performance of the transceiving channel.

The application provides a magnetron structure. The magnetron structure comprises a main body part having a containing cavity; the main body part has a plurality of vane parts which are arranged at intervals around the containing cavity; a gap between two adjacent vane parts forms a resonant cavity; the resonant cavity is arranged in communication with the containing cavity; a mounting groove and a diaphragm belt, the mounting groove is arranged on the plurality of vane parts and is in communication with the resonant cavity to form an annular groove; the diaphragm belt is arranged in the mounting groove; wherein the mounting groove comprises a shallow groove section and a deep groove section, along the extension direction of the containing cavity, the depth of the deep groove section is greater than the depth of the shallow groove section; the shallow groove section and the deep groove section are at least two, and the shallow groove section and the deep groove section are arranged alternately at intervals. Through the technical scheme provided by the application, the technical problem of poor support stability of the structure for supporting the diaphragm belt in the magnetron in the prior art can be solved.

The application belongs to the field of co-fired body materials, and discloses a double-ferrite three-layer hetero co-fired body material and a preparation method thereof. The double-ferrite three-layer hetero co-fired body material comprises an intermediate layer ferrite and upper and lower two layers of ferrite. The intermediate layer ferrite is a YIG system microwave ferrite, and the upper and lower two layers of ferrite are both NiZn system ferrites doped with Bi2O3. The three layers of ferrite are combined by co-firing. The application further provides a preparation method and application of the double-ferrite three-layer hetero co-fired body material. The application solves the technical problems that the NiZn system ferrite and the YIG system microwave ferrite of the plane contact type are not matched in sintering temperature and shrinkage characteristics, the layered hetero co-fired body is prone to co-firing mismatch, and the combination interface is not tight, ion diffusion at the interface and electromagnetic performance degradation of the material.

The utility model discloses a rotor assembly and a motor, and relates to the technical field of motors, the rotor assembly comprises a rotor yoke, a plurality of radial magnetic shoes and a plurality of circumferential magnetic shoes, and the rotor yoke is configured to be annular and rotates around a rotation axis; the plurality of radial magnetic shoes are connected to the inner side of the rotor yoke and configured to be magnetized in the radial direction of the rotating axis, and the plurality of radial magnetic shoes are arranged at intervals in the circumferential direction of the rotating axis; the plurality of circumferential magnetic shoes are connected to the inner side of the rotor yoke and configured to be magnetized in the circumferential direction of the rotating axis, and the plurality of circumferential magnetic shoes are located between every two adjacent radial magnetic shoes respectively; one side surface, facing the rotating axis, of each radial magnetic shoe comprises a first arc surface, and a first surface and a second surface which are connected to the two sides of the first arc surface in the circumferential direction, the distance between the first surface and the rotating axis is gradually increased in the direction away from the first arc surface, and the distance between the second surface and the rotating axis is gradually increased in the direction away from the first arc surface. The rotor assembly of the utility model can enhance the electromagnetic performance and improve the mute effect.

The utility model provides a kind of high-speed permanent magnet motor belongs to motor design technical field, include: motor shell, inside installation stator assembly, stator winding, rotor assembly, motor rotating shaft and bearing, stator assembly, stator assembly is composed of stator core and stator slot, and stator winding is embedded in the groove bottom position of stator slot.The utility model design structure is reasonable and compact, and the structure of long-tooth stator core and stator slot cooperate groove bottom arrangement stator winding releases radial space, so that bearing is embedded installation, shortens bearing span, improves critical speed and mechanical stability;Axial heat dissipation flow passage design realizes directional cooling while optimizing electromagnetic efficiency, solves permanent magnet demagnetization risk;Solid permanent magnet small shaft diameter embedded structure ensures the strength of rotor at the same time, effectively reduces centrifugal load and wind abrasion loss, improves high-speed operation reliability;Make the high power density of motor and ultrahigh speed in compact space obtain synergistic breakthrough.

This utility model relates to the field of electromagnetic wave conduction technology, and in particular to a conductor, a strip wire, and a power combining device. The conductor includes a branch conductor connected to a main conductor. The main conductor has a height of H1 and a width of W1. The branch conductor has a height of H2 and a width of W2, where H1 > W1 and H2 > W2. This provides a conductor with a smaller planar size, which is beneficial for device miniaturization. The strip wire uses the conductor, and the power combining device uses the strip wire.

This invention discloses a method for fully covering the surface of regular and irregular ferromagnetic materials with coil winding, belonging to the field of electromagnetic coil manufacturing technology. The core steps of this method include: S1 Axis Determination: Obtaining the geometric shape of the ferromagnetic material to be wound, and determining a rotation axis that is not perpendicular to any of the outer surfaces of the ferromagnetic material; S2 Clamping and Positioning: Using the two axial endpoints of the rotation axis as support points, fixing the ferromagnetic material on a rotation drive device, making the rotation axis vertical and perpendicular to the horizontal plane; S3 Wire Preparation: Placing the spool with copper wire wound horizontally, making the direction of the copper wire exit parallel to the horizontal plane, and fixing the starting end of the copper wire horizontally at the lowest axial end of the ferromagnetic material; S4 Rotation and Winding: Starting the rotation drive device, driving the ferromagnetic material to rotate uniformly around the rotation axis, so that the copper wire is wound layer by layer evenly around the entire outer surface of the ferromagnetic material. This invention completely solves the problem of winding dead angles in traditional winding methods, achieving full surface coverage without dead angles. It is highly versatile, simple to operate, and low in cost, suitable for coil winding of various regular and irregular ferromagnetic materials, and especially suitable for university research and small-batch customized production scenarios.

This application relates to the field of communication equipment technology, and in particular to a portable ultra-wideband antenna device for a four-in-one 5G backpack. It includes an antenna housing and a multi-in-one connector disposed within the antenna housing. The multi-in-one connector also electrically connects to a radio frequency (RF) connector. An antenna radiating element group is located inside the antenna housing and electrically connected to the RF connector. The antenna radiating element group includes a first antenna, a second antenna, a third antenna, and a fourth antenna arranged sequentially at intervals along the vertical direction of the antenna housing. In this application, the multi-in-one connector integrates the feed lines of the four antenna elements onto a single interface, simplifying the connection to the RF connector and achieving a compact structure. It integrates four independent antenna systems into a lightweight fiberglass rod, avoiding the cumbersome and bulky nature of externally mounted multiple antennas, perfectly meeting the operational or emergency needs of individual soldiers carrying and moving quickly.

The application provides a millimeter wave wide-angle scanning integrated antenna array structure, which comprises an antenna array body with a working frequency range of 24-33 GHz, wherein the antenna array body is composed of a plurality of metal claddings in a specific arrangement mode, and the antenna array body further comprises a substrate and a mounting leaf. The side plates arranged on both sides of the antenna unit can mount the antenna unit to the outside of the threaded rod, the antenna unit can be limited through bolts, the connecting plate can be telescoped on the top of the substrate through the telescoping action of the electric telescopic rod, the movable rod mounted on the top of the connecting plate can move up and down, the top plate arranged on the top of the movable rod can extrude the flexible plate, the sliding sleeve arranged on both sides of the flexible plate can slide along the outside of the sliding rod during the force receiving process at the bottom of the flexible plate, the flexible plate can be bent, and the antenna unit can be formed into a convex shape, so that the scanning performance of the antenna array can be continuously improved to meet the use requirement.

The invention discloses an alternating-current motor with an efficient heat dissipation structure, and aims to solve the problem of heat dissipation bottleneck caused by narrow air gaps and thermal boundary layer effects of a traditional alternating-current motor in a compact and closed environment. The invention provides an alternating current motor with an efficient heat dissipation structure. The system comprises an airflow excitation unit and an airflow directional conveying unit which are driven by kinetic energy of a rotor. The airflow excitation unit converts the rotation motion of the rotor into periodic compression of air through a magnetic reciprocating mechanism; the airflow directional conveying unit efficiently conveys compressed air to an air gap area through a multi-stage pressurizing structure, a spiral flow guide structure and a self-adaptive air guide structure. On the premise that the air gap is not increased and the system does not depend on external forced air cooling, active damage and enhanced heat exchange of a heat boundary layer in the air gap are achieved, the heat dissipation efficiency and the operation reliability of the motor are remarkably improved, and the system is particularly suitable for application scenes such as washing machines which are limited in space and need to frequently rotate forwards and backwards.

The invention provides a reconfigurable radar-infrared composite semi-physical simulation system which is composed of a microwave anechoic chamber, a three-axis rotary table, a radar target simulation system, an infrared target simulator, a movement mechanism, a beam combiner, a supporting mechanism, a ground rail, a lifting table, a control system and the like. The control system gives consideration to three simulation working modes of radar-infrared composite simulation, radar simulation and infrared simulation. According to the semi-physical simulation platform, few equipment resources and darkroom space resources are occupied, and three simulation working modes including radar-infrared composite simulation, radar simulation and infrared simulation are achieved in the same semi-physical simulation platform through equipment modular combination, rotary table 90-degree rotation, ground guide rail and lifting table mode reconstruction; the problem of performance contradiction between radar and infrared signals of a composite semi-physical simulation system is solved, distortion of radio-frequency signals and infrared signals after beam composition is reduced to the maximum extent, and the utilization rate of simulation resources is greatly improved.

This utility model discloses a lightweight and compact ignition coil, relating to the field of ignition coil technology. It includes: a lightweight outer shell, employing a topology-optimized hollow aluminum alloy frame and carbon fiber composite material layer composite structure, with an active cooling shell fixedly connected to its bottom surface and a connector on its top surface; and a layered electromagnetic assembly, nested inside the lightweight outer shell, consisting of a primary coil frame and a secondary coil frame. This utility model's lightweight outer shell, using a topology-optimized hollow aluminum alloy frame and carbon fiber composite material layer composite structure, significantly reduces the weight of the ignition coil, thereby reducing the load on the entire system and improving energy efficiency. The active cooling shell incorporates a serpentine cooling copper pipe, connected to an external coolant circulation device via a quick-connect pipe joint, effectively dissipating the heat generated during ignition coil operation, ensuring stable operation of the ignition coil and extending its service life.

The present invention provides a thermosetting foam-type adhesive composition, which may include a main polymer resin and a blowing agent, the foaming temperature of the thermosetting foam-type adhesive composition being 70 DEG C to 110 DEG C, the foaming rate being 50% to 400%, and the viscosity being 3000 cP to 100000 cP. Magnetic mats may include such thermoset foam adhesive compositions. A wireless charging device may include such a magnetic pad.