401 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.

Disclosed is a stylus pen including: a ferrite core; and a coil including a plurality of metal wires twisted to have a number of twist turns per unit length of at least n, and wound on an outer surface of 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 core double-sided grinding machine, which relates to the technical field of double-sided grinding processing and comprises a frame, a butt joint plate is fixedly mounted above one end of a mounting plate of the frame, a low-speed turntable is rotatably mounted on the mounting plate and the butt joint plate, and the other end of the mounting plate is rotatably connected with a grinding disc. One side of the low-speed rotating disc is inserted between the upper grinding disc and the lower grinding disc, and a low-speed motor is arranged below the mounting plate; and the limiting mechanism is arranged on the low-speed turntable. Through the arrangement of the limiting mechanism, the hole grooves in the low-speed rotating disc are used for providing a containing space for materials and transferring and clamping the materials, the materials are moved to the position between the upper grinding disc and the lower grinding disc of the grinding disc, and therefore the upper end faces and the lower end faces of the materials are ground; and transverse movement limiting of the low-speed rotating disc and the butt joint rod can be quickly relieved by applying pressing force to the pressing block, so that the low-speed rotating disc can be quickly replaced, materials of different specifications can be conveniently ground, and the working efficiency is further improved.

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 utility model relates to the technical field of machinery, and discloses a ferrite core splitting machine which comprises a workbench, the right side of the workbench is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a first threaded rod, and a first sliding groove is formed in the workbench; the first threaded rod is rotationally connected to the inner side of the first sliding groove, a sliding block is in threaded connection with the outer portion of the first threaded rod, the sliding block is slidably connected to the inner side of the first sliding groove, a cutting table is fixedly connected to the top of the sliding block, and supporting legs are fixedly connected to the four corners of the bottom of the workbench correspondingly; the top of the workbench is fixedly connected with a supporting frame, and the top of the supporting frame is fixedly connected with a lifting assembly. According to the ferrite core slitting device, due to the arrangement of the two sets of motors, rapid slitting operation of a ferrite core is achieved, the working efficiency is high, and due to the arrangement of the clamping plates, the ferrite core is clamped.

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.

The utility model discloses a multistage filtering structure integrated with current acquisition, which is used for filtering at a high-voltage end of a motor controller and comprises an injection molding shell, a nanocrystalline magnetic ring, a ferrite magnetic core and a filtering PCBA board, the injection molding shell is provided with a magnetic ring potting groove and a ferrite magnetic core potting groove, the injection molding shell is used for plastic coating of a positive / negative electrode copper bar, and the ferrite magnetic core potting groove is provided with a magnetic ring potting groove and a ferrite magnetic core potting groove. A magnetic gathering iron core is arranged on an output terminal of the positive pole copper bar and used for collecting current of a high-voltage input end, the filtering PCBA board is installed on the top of the injection molding shell in an inverted buckling mode, and a first filtering circuit located in front of the ferrite magnetic core and a second filtering circuit located behind the ferrite magnetic core are arranged on the filtering PCBA board. And the filter circuit I and the filter circuit II are respectively connected with the positive / negative copper bar to take electricity. According to the utility model, through the modular design, the product assembly process is simplified. A magnetism gathering iron core is designed at the high-voltage output end, a chip is inserted into a main control board to be used for collecting bus current, and monitoring of the current of the high-voltage input end is achieved.

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 relates to the technical field of ferrite core production equipment, and discloses cleaning and drying integrated equipment for ferrite soft magnetic material production, which comprises a main body, supporting legs are fixedly connected to four corners of the outer wall of the bottom of the main body, and four round holes are formed in the outer wall of the top of the main body; a blow-off pipe is fixedly connected to the outer wall of the back face of the main body, the cleaning mechanism comprises a motor fixedly connected to the outer wall of the top of the main body, the output end of the motor is fixedly connected with a bidirectional threaded rod, and the bidirectional threaded rod penetrates to the inner wall of the top of the main body. And finally, water is sprayed from the annular spray head, water is sprayed to the cleaning cylinder through the annular spray head in the process that the annular communicating pipe moves up and down, ferrite soft magnets in the cleaning cylinder are cleaned, the purity and performance of the magnetic cores can be ensured by cleaning pollutants on the surfaces of the magnetic cores, and therefore the product quality is improved.

The present invention discloses a soft ferrite core processing device, and relates to the field of magnet processing technology. The present invention comprises a support frame, a sintering furnace is fixedly installed on the top of the support frame, and the sintering furnace is divided into three areas from left to right, namely, a pre-sintering and shaping area, a high-temperature sintering area and a cooling area, and a mounting clamp is fixedly installed on one side adjacent to the top of the support frame, and a connecting plate is fixedly installed between the middle parts of the mounting clamp. The present invention can flip the soft ferrite core and accelerate the air flow during high-temperature sintering and cooling, so as to ensure uniform heating of the soft ferrite core during sintering and improve product quality, and at the same time, it is beneficial to uniform iron oxidation of the soft ferrite core during sintering and uniform heat dissipation during cooling, so as to meet sufficient iron oxidation and cooling, improve processing efficiency, facilitate the placement and collection of the soft ferrite core, avoid unnecessary rolling of the soft ferrite core during sintering, and facilitate the normal sintering.

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 utility model discloses a soft magnetic ferrite core detection device which comprises a detection table, a positioning table is fixedly installed in the middle of the upper end face of the detection table, a plurality of clamp seats are fixedly installed on the upper end face of the positioning table, and a strip-shaped plate is fixedly arranged on each of the two sides of the upper end face of each clamp seat. A metal strip is arranged on one side of the strip-shaped plate, a plurality of cylindrical grooves are formed in the metal strip, a circular plate attached to the inner wall of each cylindrical groove is arranged on one side of the interior of the cylindrical groove, and a fixing head located on the outer side of each cylindrical groove is fixedly arranged on one side of the outer surface of the circular plate. The other side of the outer surface of the circular plate is provided with a spring groove penetrating through the circular plate so as to extend into the fixing head. According to the utility model, various soft magnetic ferrite cores with different shapes can be automatically fixed, so that the clamping heads corresponding to the soft magnetic ferrite cores do not need to be mounted according to the shapes of the soft magnetic ferrite cores in the fixing process, and the convenience of the equipment is improved through the technical scheme.

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.