314 results about "Ferrite core" patented technology

The invention belongs to the technical field of particle accelerators, and discloses a nonlinear impact magnet based on a nanocrystalline magnetic material and a matched power supply system. The nonlinear impact magnet comprises a magnetic core and a magnet exciting coil assembly, the magnetic core comprises magnetic poles and a magnetic yoke; the magnetic pole and the magnet yoke are both of a fully-symmetrical annular structure, and the magnet yoke is arranged on the periphery of the magnetic pole. The magnetic pole comprises N same magnetic pole units, N is 4, 6 or 8, and the magnetic pole is made by laminating nanocrystalline strips; and the excitation coil assembly is wound outside each magnetic pole unit. Compared with a traditional silicon steel sheet or ferrite magnetic core, the magnet provided by the invention can improve the uniformity of a magnetic field, and the magnetic pole made of the nanocrystalline strip with ultrahigh magnetic conductivity and low coercive force has stronger magnetic field uniformity and low disturbance characteristic; and the design requirement of the STCF clash ring off-axis injection system for low disturbance of the circulating beam bunch can be better met.

The invention discloses superfinishing grinding equipment for soft magnetic ferrite core production, and mainly relates to the technical field of superfinishing grinding. Comprising a grinding disc and a rotating disc which are partially intersected, a plurality of station holes penetrate through the rotating disc, an annular tray is arranged below the rotating disc, each station hole comprises an inner hole site and an outer hole site which are communicated, the inner hole site is small, the outer hole site is large, the rotating disc comprises an upper disc piece and a lower disc piece which coaxially and synchronously rotate, and a locking arc-shaped positioning piece is arranged between the two disc pieces. The end face of the side, close to the axis of the rotary disc, of the positioning piece is an arc-shaped positioning curved surface coaxial with the rotary disc, the minimum distance between the inner hole position and the axis of the rotary disc is d, and the difference value of the radius of the positioning curved surface and d corresponds to the diameter of a magnetic core workpiece. The two ends of the positioning piece are provided with guide pieces bent in the direction away from the circle center of the rotary disc. The double-end-face machining device has the beneficial effects that continuous and efficient operation in double-end-face machining is achieved, automatic feeding and discharging are supported, and the machining precision is greatly improved.

A common mode choke is provided, including a hollow ferrite core, a plurality of coils wound around the ferrite core, and a substrate. Each of the coils has a first end and a second end. The substrate is disposed on the side of the ferrite core and has a plurality of through holes. The first and second ends of the coils are engaged in the through holes. When viewed along the central axis of the ferrite core, the first and second ends of the coils are located on the outer side the ferrite core.

The invention provides a high-frequency low-loss manganese zinc ferrite magnetic core and a preparation method thereof, and the preparation method comprises the following steps: (1) mixing base material Fe2O3 powder, MnO powder and ZnO powder, and sequentially carrying out first ball milling treatment, first sintering treatment and spray granulation to obtain granulated powder; and (2) mixing the granulated powder and an additive, and sequentially carrying out second ball milling, compression molding and second sintering treatment to obtain the high-frequency low-loss manganese zinc ferrite magnetic core. The manganese-zinc ferrite magnetic core prepared by the method is relatively low in magnetic loss under the condition of 3-5MHz, and has a wide-range popularization and application prospect.

The utility model discloses a ferrite magnetic core grinder, which relates to the field of ferrite magnetic core grinding and comprises a working platform, a grinding roller for grinding a magnetic core is mounted on the outer wall of the working platform, a movable plate is further mounted on the outer wall of the working platform in a sliding manner, and a lifting plate is vertically mounted at the top end of the movable plate in a sliding manner. The transmission mechanism is arranged on the movable plate and the lifting plate; the transmission mechanism comprises a limiting unit and a clamping unit; and the clamping unit is used for clamping the magnetic core. By arranging the transmission mechanism, when a magnetic core needs to be ground, the magnetic core can be clamped through the lead screw and the clamping block, the height of the lifting plate is adjusted by releasing limiting of the limiting block and the guide rod, the magnetic core is made to move to the needed height to make contact with the grinding roller to be ground, and compared with a traditional lifting mode, the magnetic core grinding device has the advantages that the magnetic core grinding efficiency is improved. By means of the structure, a user can conveniently and accurately adjust the height, and working efficiency is improved.

The invention discloses a solid-state transformer magnetic core loss calculation method adaptive to electric power system characteristics. The method comprises the following steps: firstly, collecting actually measured ferrite core loss data, and fitting hysteresis and eddy current loss parameters of a classical two-item model; setting 100kHz as a low-frequency and medium-high-frequency demarcation point through an eddy current and magnetic hysteresis loss balance point and a relaxation effect, and dividing three frequency bands by taking a skin effect characterization parameter greater than 2 as a medium-frequency and high-frequency demarcation point; adding a specific compensation item according to the loss characteristics of each frequency band, and constructing a segmented two-item model with compensation items; and fitting the parameters by adopting an L-M algorithm to calculate the total loss. According to the method, through frequency and flux density interval double division and compensation item introduction, the influence of nonlinear factors is effectively considered, and the magnetic core loss calculation precision is remarkably improved.

A power transmitter for wireless power transfer includes a control and communications unit, an inverter circuit, a coil, and a shielding. The control and communications unit is configured to provide power control signals to control a power level of a power signal configured for transmission to a power receiver, provide a power request to an external power supply, determine if a power signal at the coil is compliant with the power request, and, if the power signal at the coil is compliant with the power request, continue to operate for wireless power transmission. The coil is configured to transmit the power signal to a power receiver. The shielding comprises a ferrite core.

The invention relates to the technical field of magnetic core extrusion forming machines, and discloses a soft magnetic ferrite core extrusion forming machine which comprises a driven telescopic plate, a contact ring is fixedly connected to the end of the driven telescopic plate, and a transmission plate is fixedly connected to the surface of the driven telescopic plate. A vibration mechanism is arranged, a power device is started to drive a rotating shaft to rotate at the moment, when the rotating shaft rotates, a vibration roller is driven to rotate, when the vibration roller rotates, friction is generated between the vibration roller and the surface of a vibration plate, a vibration sense is generated in the friction process of the vibration roller and the vibration plate, and when the vibration plate vibrates, a driven telescopic plate is driven to vibrate; when the driven telescopic plate vibrates, the contact ring is driven to vibrate, when the contact ring vibrates, the positioning ring is driven to vibrate, and when the positioning ring vibrates, the internally-formed magnetic core is separated from the inner wall of the positioning ring and the surface of the extrusion die, so that the magnetic core is effectively separated from the extrusion die and the positioning ring and cannot be bonded together.

The invention relates to the technical field of soft magnetic ferrite materials, in particular to a preparation method of a high-permeability soft magnetic ferrite core material, which comprises the following steps: firstly, preparing FeSiCrBCu soft magnetic alloy powder with uniform components and controllable particle size through a single-roller quenching and hydrogen decrepitation process, and laying a structural foundation for excellent magnetic performance; and then a mechanical stirring-ultrasonic synergistic coating technology is utilized, so that the ferrite precursor uniformly coats the alloy powder, an effective core-shell structure is formed, and solid-phase reaction and crystal grain uniform growth during sintering are promoted. Besides, a multi-task deep learning model (MTL-DL) based on transfer learning is adopted to carry out multi-objective collaborative optimization on the sintering process, accurately match and dynamically adjust key parameters, and accurately regulate and control the material densification process, the grain size and the phase distribution on the microcosmic level, so that the problem that the microstructure and component uniformity are difficult to accurately control in the prior art is solved; therefore, the problems of poor material performance and high power loss are solved.

The invention discloses a transformer magnetic powder core, a transformer and a preparation method of the transformer magnetic powder core, the transformer magnetic powder core comprises a main body formed by a coarse powder layer, a fine powder layer is formed on at least one matching surface, used for being in contact with another magnetic powder core of the transformer, of the main body, and the powder granularity of the coarse powder layer and the fine powder layer forms gradient distribution. A fine powder layer structure with the particle size smaller than that of a magnetic powder core body is arranged on the matching face of the magnetic powder core of the transformer, and the performance bottleneck caused by low saturation flux density, weak large-current direct-current bias capacity and size limitation of a traditional ferrite core is effectively solved through the coarse / fine powder layer particle size gradient distribution design. According to the design, by optimizing filling of the interface fine powder layer, the risk that powder falls off to form an air gap in the grinding and polishing machining process is remarkably reduced, the flatness of the matching face and the continuity of a magnetic circuit are improved, and therefore the inductance value is increased and the power loss is reduced on the basis that the comprehensive performance is guaranteed.

Provided is a proximity sensor capable of sufficiently extending a detection distance by suppressing an influence of embedded metal. The proximity sensor includes a coil, a transmission circuit, a ferrite core, a reception circuit, and a control circuit. The transmission circuit periodically applies a pulsed excitation current to the coil. The coil includes a first coil and a second coil disposed concentrically with the first coil. The transmission circuit applies an excitation current to one of the first coil and the second coil. The reception circuit detects a voltage or a current generated in each of the first coil and the second coil by the magnetic field. The control circuit detects the detection object based on the change in the voltage or the current generated in each of the first coil and the second coil detected by the reception circuit.

Provided is a proximity sensor capable of sufficiently extending a detection distance by suppressing the influence of an embedded metal. The proximity sensor includes a coil, a transmitting circuit, a ferrite core, a receiving circuit, and a control circuit. The transmission circuit periodically applies a pulsed excitation current to the coil. The coils include a first coil and a second coil arranged concentrically with the first coil. The transmission circuit applies an excitation current to one of the first coil and the second coil. The receiving circuit detects a voltage or a current generated in each of the first coil and the second coil by the magnetic field. The control circuit detects the detection target on the basis of the change in the voltage or current generated in each of the first coil and the second coil detected by the reception circuit.

The invention discloses a small-size high-power power supply design method and application based on a planar transformer, and the method comprises the following steps: S1, employing a planar transformer structure comprising at least two layers of PCB windings and a low-loss ferrite magnetic core, enabling the windings to be formed through the etching of PCB copper foils, and enabling the leakage inductance of the adjacent winding layers to be reduced in a staggered stacking manner; s2, the planar transformer is integrated into an LLC resonant half-bridge topology circuit, and soft switching operation of a power supply system under high frequency is achieved by adjusting the primary and secondary turn ratio and resonance parameters of the planar transformer. PCB copper foil etching windings and low-loss ferrite magnetic cores are adopted, leakage inductance is reduced by stacking winding layers in a staggered mode, and the reliability of the power supply system is improved; the planar transformer is combined with laser cutting to precisely control an air gap, so that primary and secondary coupling coefficients are improved to a high coupling state, energy loss is reduced, the size of the transformer is effectively reduced, the planar transformer can be popularized to the fields of industrial power supplies, energy storage systems and the like, and balance of small size and high power is achieved through collaborative optimization of the planar transformer and a topological structure.

The invention discloses high-stability ferrite core automatic grinding equipment, and belongs to the technical field of machine tools and devices for grinding or polishing. The equipment comprises a machine cover, a workbench, two three-axis displacement mechanisms, two grinding mechanisms, two multi-connection clamping mechanisms, a scrap removing assembly and a two-way pressing mechanism, the three-axis displacement mechanisms drive the grinding mechanisms to achieve accurate movement in the X-axis direction, the Y-axis direction and the Z-axis direction, the grinding mechanisms grind magnetic cores, and the multi-connection clamping mechanisms and the two-way pressing mechanism jointly act, so that the scrap removing assembly can remove scraps on the magnetic cores. The magnetic core is stably clamped, and chippings and cooling water generated by grinding are treated in time through the chipping removing assembly; according to the grinding device, the grinding precision, stability and automation degree of the ferrite magnetic core are improved, the production efficiency is improved, the working environment is optimized, and the grinding device is suitable for machining of the hollow tubular ferrite magnetic core and has high practicability and popularization value.

A power transmitter for wireless power transfer includes a verification load, a control and communications unit, an inverter circuit, a coil, and a shielding. The control and communications unit is configured to provide power control signals to control a power level of a power signal configured for transmission to a power receiver, provide a power request to an external power supply, determine if a power signal at the verification load is compliant with the power request, and, if the power signal at the verification load is compliant with the power request, continue to operate for wireless power transmission. The coil is configured to transmit the power signal to a power receiver. The shielding comprises a ferrite core.

An electric noise suppressor is provided for suppressing electric noise of at least one cable. The suppressor includes first and second ferrite members. Each of the ferrite members has an inner surface and an outer surface facing away from the inner surface, the first and second ferrite members being disposed so the inner surfaces face one another. The suppressor further includes first and second retention clips. Each of the retention clips has a side wall and opposed first and second pressing walls extending from spaced apart locations on the respective side wall. The retention clips are disposed so that the first pressing walls engage the outer surface of the first ferrite member and the second pressing walls engage the outer surface of the second ferrite member. The first and second pressing walls are configured to press the inner surfaces of the first and second ferrite members toward one another.

Compact inductive devices are disclosed herein. According to certain embodiments, a compact inductive device comprises a ferrite core, a ferrite body, and a first conductive column and a second conductive column, each extending from a lower surface of the ferrite body to an upper surface of the ferrite body. Furthermore, the compact inductive device comprises a planar substrate coupled to the upper surface of the ferrite body. The planar substrate includes wiring that electrically connects the first conductive column to the second conductive column.

A filter structure is provided. The filter structure includes a substrate, a capacitor element, and a first choke element. The capacitor element and the first choke element are disposed on the substrate. The first choke element has a first ferrite core, two first windings wound around the first ferrite core, and a first magnetic conductive member. The first ferrite core is received in the first magnetic conductive member and located adjacent to the first choke element.

The present disclosure relates to an input system, and more particularly, to an electronic device capable of sensing a stylus pen together with an object such as a finger that is in proximity or in contact with the outside, and an input system including a stylus pen including a ferrite core for a stylus pen capable of improving the magnitude of a pen signal received by the electronic device.

The invention discloses a magnetic coupling surge protection device based on an amorphous ferrite material, which comprises an amorphous ferrite magnetic core, a secondary side inductor, a secondary side resistor, a bias conductor and a bias power supply, is nested outside a high-voltage direct-current transmission line, and forms magnetic field coupling with the high-voltage direct-current transmission line through the amorphous ferrite magnetic core in the device. When suddenly changed surge current flows through the device, a rapidly changing magnetic field is excited in the amorphous ferrite material, the magnetic field provides equivalent inductance for the high-voltage direct-current transmission line, and meanwhile, the rapidly changing magnetic field generates induced electromotive force in the bias conductor and generates induced current; the induced current generates heat loss in the process of flowing through the secondary side resistor, and surge current energy in the high-voltage direct-current transmission line is converted into the heat loss of the secondary side resistor through the process, so that surge protection is realized. The invention has the advantages of high saturation magnetic flux density, high relative permeability, excellent high-frequency performance and the like, and is suitable for the operation condition of magnetic coupling surge protection equipment.

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a ferrite core and a stylus pen including the same, and more particularly, to a ferrite core capable of improving a magnetization effect due to an external magnetic body and a stylus pen including the same.SOLUTION: A ferrite core according to an embodiment of the present invention is a ferrite core mounted inside a stylus pen, and the ferrite core includes 60 to 80 wt% of iron (Fe), 15 to 30 wt% of manganese (Mn), and 3 to 20 wt% of zinc (Zn).SELECTED DRAWING: Figure 3

The utility model discloses a soft magnetic ferrite core surface finishing device, which relates to the technical field of magnetic core production and comprises a base and a support plate, electric cylinders are mounted on two sides of the bottom of the support plate, output ends of the electric cylinders are connected with a support disc through extension rods, and an inner ring of the support disc is connected with a transmission wheel. Through the arrangement of the polishing disc, the sleeve, the bonding layer, the polishing abrasive paper, the electric cylinder, the supporting disc, the transmission wheel and the first transmission groove, the surface of the ferrite core body can be conveniently polished and trimmed through the arrangement of the polishing disc; when an inner ring of an annular ferrite core body needs to be polished and trimmed or a gap of an E-shaped ferrite core body needs to be polished and trimmed, the output end of an electric cylinder drives a supporting disc to move upwards through an extension rod, the supporting disc moves upwards to drive a polishing disc to move upwards through a transmission wheel, and therefore polishing abrasive paper leaks out of the bottom of the polishing disc; the polishing head does not need to be disassembled or replaced or replaced to another polishing device, and operation is easy and convenient.

The application relates to the technical field of soft magnetic ferrite cores, and particularly discloses a grinding device for soft magnetic ferrite core processing and a method thereof, which comprises a feeding frame, a processing bottom frame, a processing top frame and a discharging frame. The surfaces of the soft magnetic ferrite cores are comprehensively ground by two grinding mechanisms symmetrically arranged above and below, manual turning operations of the soft magnetic ferrite cores are not needed, the grinding efficiency of the soft magnetic ferrite cores and the consistency and stability of the grinding are significantly improved, human errors are reduced, and the production efficiency is improved. When the soft magnetic ferrite cores are ground by the two symmetrically arranged grinding mechanisms above and below, the grinding liquid is first sprayed, sufficient cooling can be maintained during the grinding process, and the performance of the cores is prevented from being damaged due to overheating. In addition, the grinding debris generated during the grinding process can be flushed by the grinding liquid, and the grinding effect is prevented from being affected by the grinding debris adsorbed on the soft magnetic ferrite cores.

The utility model provides a three-dimensional coil and planar coil combined wireless charging system, which relates to the technical field of wireless charging and comprises a transmitting end and a receiving end. The transmitting end comprises a direct-current power supply, an inverter circuit, a transmitting end compensation circuit and a transmitting coil; the receiving end comprises a receiving coil, a receiving end compensation circuit and a rectification filter circuit. Wherein the transmitting coil comprises a manganese zinc ferrite magnetic core and a three-dimensional coil, and the three-dimensional coil is spirally and densely wound on the outer side of the manganese zinc ferrite magnetic core; the receiving coil comprises a planar coil and manganese zinc ferrite flat magnetic bars, the planar coil is wound into a circular ring shape, the manganese zinc ferrite flat magnetic bars are alternately arranged on the circular ring-shaped planar coil along the normal direction and the tangential direction, and the difference between two adjacent normal manganese zinc ferrite flat magnetic bars is 60 degrees; the difference between two adjacent tangential manganese zinc ferrite flat magnetic bars is 60 degrees, and the difference between the adjacent normal manganese zinc ferrite flat magnetic bar and tangential manganese zinc ferrite flat magnetic bar is 30 degrees.

A power transmitter for wireless power transfer includes a control and communications unit configured to provide power control signals to control a power level of a power signal configured for transmission to a power receiver and including a pulse width modulation (PWM) signal generator for determining and selecting the operating frequency from the operating frequency range. The power transmitter further includes an inverter circuit configured to receive a direct current (DC) power and convert the input power to a power signal, coil configured to transmit the power signal to a power receiver, the coil formed of wound Litz wire and including at least one layer, the coil defining, at least, a top face, and a shielding comprising a ferrite core and defining a cavity, the cavity configured such that the ferrite core substantially surrounds all but the top face of the coil.

To provide a lighting device that can reduce the load on the wiring. [Solution] The lighting device 10 comprises a fixture body 12, a power supply unit 14, and a ferrite core 18. The fixture body 12 has a power supply mounting surface 26. The power supply unit 14 is disposed on the power supply mounting surface 26 and has a power supply side connection part 34 to which one end of the wiring 17 is connected. The ferrite core 18 has an insertion hole 41 through which the middle of the wiring 17 is inserted, and is positioned such that the height of the insertion hole 41 from the power supply mounting surface 26 is at the same height as at least a part of the power supply side connection part 34.

The utility model relates to high frequency power converter technical field, concretely is a kind of magnetic core structure suitable for high frequency power converter.The utility model, including coil and fixed frame, the coil is installed in the inner wall of fixed frame, the lower surface of fixed frame is fixedly connected with two connecting seats, the inside of connecting seat is installed with several pins, the inner wall of fixed frame is covered with insulating coating, the inner wall of fixed frame is movably installed with two ferrite magnetic cores, two the ferrite magnetic core adsorbs and connects, the surface of pin is covered with protection tube, the protection tube is silica gel tube, the surface of two the ferrite magnetic core is wound with fixed band, the fixed band is magnetic core fixed band.Solved under high frequency operating condition, the magnetic hysteresis loss and eddy current loss of magnetic core sharply increase, lead to the serious heating of magnetic core, not only reduce the conversion efficiency of power converter, also possibly influence its long-term reliability problem.

The invention discloses a material receiving device for soft magnetic ferrite core production, and relates to the field of soft magnetic ferrite production and processing.The material receiving device comprises a first conveying frame and a second conveying frame distributed at the end of the first conveying frame, the second conveying frame and the first conveying frame are perpendicularly distributed, and the end of the second conveying frame abuts against the side wall of the first conveying frame; open right-angle through grooves are formed in the top of the first conveying frame and the top of the second conveying frame, and protective skirts are further fixedly arranged on the outer edges of the upper ends of the right-angle through grooves. Various soft magnetic ferrite blanks with different appearances can be automatically transferred from the first conveying belt to the second conveying belt through the transferring unit, the application range of the soft magnetic ferrite blank conveying device is wider, and the production efficiency is improved. In addition, the first conveying belt and the second conveying belt can trigger the batch discharging unit through the driving unit in the running process, the multiple soft magnetic ferrites stacked on the second conveying belt can be synchronously discharged in batches through the batch discharging unit, the discharging speed is high, and convenience is achieved.

The invention relates to a composite pane assembly (1) comprising - a composite pane (2) with a first pane (3) and a second pane (4), which are joined together flat against each other by a thermoplastic intermediate layer (5), - an electrical functional element (6) between the two panes (3, 4), - a ribbon cable (7) with electrical conductor tracks (14), wherein the ribbon cable (7) has a first ribbon cable connection region (10) at a first ribbon cable end (8) and a second ribbon cable connection region (11) at a second ribbon cable end (9), wherein the first ribbon cable connection region (10) is arranged between the two panes (3, 4) and the second ribbon cable connection region (11) is led out of the composite pane (2), and wherein the electrical conductor tracks (14) electrically contact the electrical functional element (6) in the first ribbon cable connection region (10), - a connection cable (16) with one or more cable strands (17, 18), wherein the connection cable (16) comprises a plurality of round conductors (31), wherein the connection cable (16) has a first connection cable connection region (21) at a first connection cable end (19) and a second connection cable connection region (22) at a second connection cable end (20), wherein the first connection cable connection region (21) is electrically connected to the second ribbon cable connection region (11) and the second connection cable connection region (22) is intended for electrical connection to control electrics for the electrical functional element (6), and wherein the connection cable (16) has, between the first connection cable connection region (21) and the second connection cable connection region (22), an electrical interference suppression member (32) for damping high-frequency noise, wherein the electrical interference suppression member (32) i) is a ferrite core (33) arranged around the connection cable (16), or ii) is a flat electrical component (34) galvanically connected to the round conductors (31) of the connection cable (16), wherein the connection cable (16) has an electrical interruption (39), as a result of which a first connection cable portion (40) and a second connection cable portion (41) are formed, wherein the flat electrical component (34) is electrically connected in series to the two connection cable portions (40, 41) at the electrical interruption (39), wherein the flat electrical component (34) includes an inductance (36), optionally in combination with a capacitance (37), for each round conductor (31).

Solid-state switch array apparatus and methods for digitized plasma magneto-inertial fusion are disclosed herein. A solid-state switch array apparatus for enabling discharge of direct current includes multiple solid-state switches arranged in series and parallel configurations. The apparatus includes corresponding series resistor circuits connected in parallel with each solid-state switch to distribute voltage across the switches and receive constant current flow from a power supply during charging. Snubber circuits including capacitors configured in parallel with each solid-state switch protect against transient back electromotive force during discharge. A ferrite core assembly includes wire fed through ferrite cores wound and connected to gates and cathodes of the solid-state switches. The ferrite core assembly delivers voltage pulses to simultaneously transition all switches to a conducting state in response to discharge from a discharge circuit capacitor, enabling control for plasma generation applications.