9results about How to "Improve electromagnetic performance" patented technology

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.

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 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 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.