3179 results about "Magnetic core" patented technology

The present invention relates to a magnetic resonance system and a gradient amplifier filter for a magnetic resonance system. The filter includes a plurality of non-magnetic core inductors and a printed circuit board having a multilayer structure, a plurality of filter capacitors being formed in a plurality of regions of the printed circuit board, respectively, wherein each non-magnetic core inductor is provided on the printed circuit board and spanning two of the plurality of filter capacitors.

The invention provides a current sensor. The current sensor adopts a magnetic-core-free design, and adopts a diversion row group with a special structure to guide a target current so as to enhance the electrifying capability of the current sensor and reduce the adverse effect of a high-frequency current skin effect on measurement. Based on the structural characteristics of the diversion row group, the magnetic sensitive component for measuring the target current and the corresponding sensing signal processing method are arranged in a matched manner, so that the measurement precision of high-frequency large current is improved, the suppression capability of an interference magnetic field is improved, and the signal-to-noise ratio of an effective measurement signal is increased. The current sensor provided by the invention is compact in structure, simple in manufacturing process, strong in electrifying capability and high in signal-to-noise ratio of a sensing signal, not only widens the measuring range of the current sensor, but also effectively improves the measurement precision of high-frequency large current, and expands the application range of the magnetic-core-free current sensor.

An inspection system detects defects within a component using eddy current thermography. An infrared camera detects heat from a defect within the component generated by the eddy current interfering with the defect. The eddy current is generated in the component by a magnetic field applied to the component by an inductor assembly. The inductor assembly includes a magnetic core having magnetic core material and two arms, each arm including a coil to generate the magnetic field. The inductor assembly is configured to apply the magnetic field at an angle offset from a horizontal axis of the magnetic core such that the eddy current flows at an angle within the component relative to the offset angle. Further, the magnetic core material can be shaped to apply the magnetic field at the offset angle or to accommodate complex component shapes.

The invention discloses a few-sample inductance core surface defect detection method based on model interaction, and belongs to the technical field of machine vision and industrial defect detection. The method comprises the following steps: S1, data acquisition and image preprocessing are carried out, and normal samples, labeled samples and unlabeled samples are constructed; s2, constructing an unsupervised statistical model based on statistical learning; s3, constructing a supervised semantic segmentation model; s4, inputting an inductance core image to be detected into the unsupervised statistical model and the supervised semantic segmentation model at the same time for processing, and generating a segmentation result; s5, detecting result differences are quantified; s6, performing parameter updating on the unsupervised statistical model; s7, generating a pseudo label based on an unsupervised statistical model; s8, carrying out weight updating on the supervised semantic segmentation model; and S9, inputting the processed to-be-detected images into the updated unsupervised statistical model and supervised semantic segmentation model in batches for detection to obtain a detection result, and analyzing and calculating system performance indexes.

The invention discloses a manufacturing method of an encapsulation type driver transformer with high heat dissipation efficiency, and belongs to the technical field of power electronic equipment manufacturing. The invention aims to solve the technical problems of low heat dissipation efficiency and insufficient long-term reliability caused by limited heat-conducting property of a potting material, simple surface heat dissipation structure and difficulty in coordination of internal thermal stress of the existing driver transformer. The method comprises the following steps: constructing a three-dimensional digital model of a reinforced heat dissipation structure with a boss array and a groove array, and preparing a corresponding forming mold; a magnetic core and a winding are used as inserts to be positioned in a mold cavity, insulating colloids with different mechanical and heat conduction characteristics are poured in a vacuum environment in batches, internal gaps are fully filled with flexible colloids and stress is buffered through a segmented curing process, meanwhile, high-heat-conduction rigid colloids form an external main body and a heat dissipation structure, and an integrated potting body is formed. The method is used for manufacturing the driver transformer suitable for scenes with high power density and high heat dissipation requirements, and the heat dissipation capability and the operation reliability of the driver transformer can be remarkably improved.

The invention provides a biphase composite magnetic material magnetically controlled reactor electromagnetic transient simulation method, device and equipment and a medium, and relates to the technical field of power equipment magnetic material testing and electromagnetic transient simulation. According to the invention, the test winding is arranged on the excitation winding of the magnetically controlled reactor, and multi-dimensional means of obtaining total iron loss through an open circuit test, obtaining magnetic hysteresis loss through a frequency reduction test, obtaining copper loss and leakage reactance through a short circuit test and the like are combined, so that separation of magnetic hysteresis loss, eddy current loss and additional loss can be realized; a high-fidelity hysteresis loop and a magnetic conductivity change rule are obtained, and the nonlinear characteristic and hysteresis response of the magnetic core can be accurately captured, so that the predictive capability of equipment performance and the sensing capability of an operation state are improved.

The invention provides a magnetic core mutual inductor with a magnetic core convenient to replace, and relates to the technical field of magnetic core mutual inductors. The magnetic core mutual inductor with the magnetic core convenient to replace comprises a base. Through the matching design of the limiting blocks between the base sinking groove and the connecting seat and the circumferentially distributed limiting grooves, the connecting seat can be positioned along a plurality of preset angles, the magnetic core can be adaptively adjusted along with the angle of a mounting base plane, and the magnetic core can be quickly positioned and locked by adopting a quick locking structure that the upper shell and the lower shell are hinged and matched through a transverse and longitudinal dual positioning and locking mechanism. Opening and closing of the upper shell and the lower shell can be completed through one-hand operation, the disassembly and assembly time for magnetic core replacement or maintenance is greatly shortened, through collaborative design of a graphene heat conduction layer, a phase change heat storage layer and a flexible buffer layer, heat conduction and absorption capacity are enhanced, meanwhile, thermal expansion stress is counteracted through a flexible material, heat dissipation efficiency improvement and structural reliability are both considered, and the application range is wide. And the technical defects of high-temperature accumulation and material deformation easily caused by a single heat dissipation layer design are overcome.

The invention provides a filter, a chuck, a shower head and semiconductor equipment. The inductor of the filter comprises a magnetic core and a winding; the magnetic core comprises a winding area; the winding comprises at least two winding wires, the at least two winding wires are gathered together and jointly wound on the winding area, at least one winding wire is used for transmitting a first current signal, at least one winding wire is used for transmitting a second current signal, and the current directions of the first current signal and the second current signal are opposite. One end of each winding wire is connected with a power supply, and the other end is connected with the chuck and an electrode of a heater of the shower head. According to the technical scheme of the invention, the inductor of the filter has high integration level, high inductance and good differential mode characteristic, so that the miniaturization of the filter is realized, the filtering performance of the filter is improved, the heating performance of a chuck or a shower head is stable, and semiconductor equipment can always have good working reliability.

The invention discloses a low-loss planar transformer design method suitable for an LLC resonant converter, and the method comprises the steps: firstly collecting the index parameters of the LLC resonant converter, setting the target parameters of a planar transformer, selecting a magnetic core model meeting the requirements according to an AP method, and then carrying out the design of a winding structure, finally, modeling and simulation of the planar transformer are completed in finite element software, and if the simulation result does not meet the set parameter and loss requirements, selection of the magnetic core model and design of the winding structure need to be conducted again; and if the set parameters and the loss requirements are met, finishing the design.

The invention belongs to the technical field of gap measurement, and particularly relates to a high-temperature-resistant transparent shell type eddy current tip gap measuring device and method, and the device comprises a sensor probe module, a signal conditioning module, a data collection module and a data processing module. The sensor probe module is mounted on the outer wall of the casing; the sensor probe module comprises a permanent magnet excitation source, a soft magnet magnetic core and a receiving coil; the signal conditioning module is electrically connected with the receiving coil and is used for amplifying, filtering and integrating the weak induction signal; the data acquisition module is electrically connected with the signal conditioning module and converts an analog signal into a digital signal; the data processing module is used for processing the acquired digital signals and extracting blade tip clearance information.

The invention provides a miniature breaker with a novel current detection assembly. The miniature breaker with a novel current detection assembly includes a breaker main body and a novel current detection assembly, wherein the novel current detection assembly includes a Hall magnetic field sensor, a current detection wire, and a Hall magnetic field sensor detection circuit board; a detection Hallmagnetic field sensor in the Hall magnetic field sensor without a magnetic core is used to detect a magnetic field which is generated from the current detection wire, and an environment Hall magneticfield sensor in the Hall magnetic field sensor is used to detect a background magnetic field in the environment; and the difference values detected by the detection Hall magnetic field sensor and theenvironment Hall magnetic field sensor are processed to obtain the magnitude of the current, so as to eliminate the interference of the background magnetic field and enable the detected current to bemore accurate. Therefore, the breaker with the novel current detection assembly can accurately perform opening and closing.

The invention relates to a tunnel reluctance current sensor structure and temperature parameter optimization method and system, and the method comprises the steps: arranging an annular magnetic core, forming symmetrically distributed air gaps in the annular magnetic core, placing a tunnel reluctance current sensor in each air gap, and forming a double-air-gap magnetic circuit structure; constructing a magnetic field consistency coefficient according to the average magnetic induction intensity, the minimum magnetic induction intensity and the maximum magnetic induction intensity of the air gap center area, and performing optimization solution on structural parameters of the double-air-gap magnetic circuit structure by taking minimization of the magnetic field consistency coefficient as a target; respectively establishing a measurement channel and a reference channel according to the double-air-gap magnetic circuit structure obtained through optimization solution; multiple times of voltage signal acquisition are carried out through a reference channel under different injection reference currents and different temperature environments, and a temperature compensation factor is calculated, so that gain parameters of an amplifier in a measurement channel are adjusted. Compared with the prior art, the anti-interference capability and the measurement sensitivity of the system can be greatly improved.

A sensor element for checking the authenticity of a planar data carrier, in particular a banknote, has a spin resonance feature. The sensor element contains a magnetic core having an air gap, into which the planar data carrier can be inserted for authentication and which defines an axial direction extending between the adjoining surfaces of the magnetic core, a polarization device for generating a static magnetic flux in the air gap, a modulation device for generating a time-varying magnetic modulation field in the air gap, and a resonator for exciting the spin resonance feature of the data carrier to be checked. The modulation device is formed by at least one planar coil arranged in the air gap, which planar coil has one or more turns about the axial direction of the air gap in one plane. The disclosure also relates to a checking device having such a sensor element.

The invention relates to the field of electronic power, particularly discloses a bridge resonant converter based on forward and reverse shock coordination of double transformers, and belongs to the technical field of power electronic conversion. Aiming at the problems of over-high peak current, high magnetic core saturation risk, remarkable switching loss and the like of a traditional LLC resonant converter under the requirements of a wide load range and high power density, the invention provides the following innovative schemes: a dual-transformer forward and reverse excitation collaborative structure, a zero voltage switching (ZVS) driving technology and resonant network parameter optimization.

The invention relates to the related technical field of geophysical exploration instruments, in particular to a miniaturized broadband induction type magnetic field sensor. The sensor comprises a magnetic core, an induction coil, a feedback coil and a signal processing circuit. The invention is characterized in that the magnetic core is of a long rod-shaped structure formed by laminating and curing high-permeability soft magnetic strip materials, the length of the magnetic core is 580mm-640mm, the cross section of the magnetic core is a square or an equivalent circle with the side length of 11mm-15mm, and the length-diameter ratio of the magnetic core is greater than 40; the feedback coil is formed by spirally winding a metal foil belt along the magnetic core, and the metal foil belt forms a main shielding layer for restraining interference of an external electric field at the same time. By optimizing the size and the length-diameter ratio of the magnetic core and combining the integrated design of feedback and shielding functions, while the working frequency band and the low-noise performance are ensured, remarkable miniaturization and light weight of the sensor are realized, and the portability and the layout efficiency of field exploration are greatly improved.

The invention belongs to the technical field of braking, and discloses an electromagnet which is used for an EMB parking structure, the EMB parking structure comprises a motor, a ratchet wheel and a pawl, the electromagnet comprises a frame body, a static magnetic assembly, a movable magnetic core and an elastic piece, the static magnetic assembly is arranged in the frame body, the movable magnetic core penetrates through the frame body and is connected with the pawl, the static magnetic assembly generates force F1 for driving the movable magnetic core to move, and the elastic piece is arranged on the frame body. The F1 changes along with movement of the movable magnetic core, and the elastic piece is used for generating force F2 for driving the first end of the movable magnetic core to extend outwards. When the vehicle is not parked, the movable magnetic core is located at the initial position; when parking is needed, the movable magnetic core extends outwards from the initial position to the parking position through the first position, and the pawl is driven to move and abut against the interior of a tooth groove between every two adjacent ratchets of the ratchet wheel. When the electromagnet is not powered on, the movable magnetic core is located at the first position, F1 is equal to F2, the stroke length of the movable magnetic core from the parking position to the first position is larger than the ratchet height of the ratchet wheel, and the electromagnet can be matched with the motor to achieve the anti-sliding function without being powered on any more.

The utility model provides a high-power switching power supply planar transformer with an adjustable turn ratio, which comprises a magnetic core, and a winding component is fixed in the magnetic core; the winding assembly is formed by stacking a plurality of secondary winding copper sheets and a plurality of primary winding copper sheets in a crossed mode, two primary leading-out terminals are arranged on the side portion of the same end of each primary winding copper sheet, and two secondary leading-out terminals are arranged on the end portion of each secondary winding copper sheet. The primary leading-out terminal connects a plurality of primary winding copper sheets in series through a primary fixing bolt, and the secondary leading-out terminal connects a plurality of secondary winding copper sheets in series through a secondary fixing bolt. According to the utility model, a plurality of primary leading-out terminals and secondary leading-out terminals are arranged on the winding, and the primary and secondary turns of the transformer can be flexibly selected by connecting different leading-out terminals; and the tedious process in the PCB winding manufacturing process is omitted, the raw material cost and the production and processing cost are greatly reduced, and the production period is shortened.

The utility model provides a power module which comprises an insulating plate, a transformer and a first shielding layer, the insulating plate comprises a flat plate part, the transformer comprises a magnetic core and a first winding wound on the magnetic core, the first winding comprises a first part and a second part which are electrically connected, the first part is located on the side, away from the magnetic core, of the insulating plate, and the second part is located on the side, away from the magnetic core, of the insulating plate. The second part is arranged in the insulating plate in a penetrating manner; the first shielding layer is at least arranged on one side, facing the magnetic core, of the insulating plate; in a first reference plane parallel to the flat plate part, the projection of the magnetic core is located in the projection range of the first shielding layer. The first shielding layer is arranged on the side, facing the magnetic core, of the insulating plate, and the projection of the magnetic core is located in the projection range of the first shielding layer, so that the air field intensity around the magnetic core can be reduced through the first shielding layer, the insulating service life is prolonged, and the product reliability is improved.

The invention relates to a power supply module, electronic equipment and a preparation method of the power supply module, the power supply module comprises a substrate, a power supply chip, a first electronic device and a second electronic device, the power supply chip is arranged in the substrate, the first electronic device is arranged on the surface of one side of the substrate along the thickness direction of the power supply module, and the second electronic device is arranged on the surface of the other side of the substrate. The first electronic device is electrically connected with the power supply chip, the side, away from the substrate, of the first electronic device is used for being electrically connected with the circuit board, the second electronic device comprises an inductor, the inductor comprises a magnetic core and a magnetic packaging part, the magnetic core is electrically connected with the power supply chip, and the magnetic core is packaged on the surface of the side, away from the first electronic device, of the substrate through the magnetic packaging part. The power supply module with the structure occupies a small area, can shorten a power routing path, reduce parasitic power routing path, reduce power loss, reduce an electric stress risk, can reduce the overall thickness of the power supply module, and improves the layout space of the first electronic device and the second electronic device, thereby facilitating the improvement of the power supply performance of the power supply module.

An electric machine having a shaft, a rotor with a magnetic core comprising a series of stacked laminations and a plurality of seats oriented axially, a plurality of magnetic poles, each having two permanent magnets, and a stator. The magnetic core comprises first laminations alternated with different second laminations, with at least ten second laminations interposed between two first laminations. Each first lamination has, for each seat, two first fixing blades, which are parallel to each other, and arranged on the same side of the first seat and bent by 90° against a same larger side wall of a corresponding permanent magnet, and also has, for each seat, a second fixing blade, which is oriented perpendicular to the corresponding first fixing blades and bent by 90° against a smaller side wall of a corresponding first permanent magnet. Each second lamination lacks fixing blades bent against the corresponding permanent magnet.

The utility model discloses a film coating device for the inner wall of a long and thin tube with a medium-small caliber and a deep inner hole, and belongs to the technical field of film coating. The coating equipment consists of a control unit and a coating unit. The control unit comprises a vacuum chamber and a gas inlet system, the vacuum chamber is used for installing and placing the pipe and providing a vacuum environment, and the gas inlet system is used for injecting working gas into the vacuum chamber. The coating unit is composed of a target material, a magnetic coil and a driving mechanism, and the target material is installed on the central axis in the pipe. The magnetic coil provides a uniform magnetic field environment for the coating device, the output end of the driving mechanism is mechanically connected with the target material and the magnetic coil, and synchronous transmission control between the target material and the magnetic coil is ensured. The device is particularly suitable for quickly and efficiently coating the inner wall of a long and thin pipe with a deep inner hole and the caliber of 40mm or below, and the quality of a film layer is excellent. The magnetic core in the target material is externally arranged, so that the diameter of the target material is reduced, disassembly and assembly are simplified, the manufacturing difficulty and cost are reduced, and the economic benefit is improved.

The invention discloses a design method of a PCB (Printed Circuit Board) integrated multi-winding planar transformer, which comprises the following steps of: forming a flat spiral or snake-shaped wire, a primary winding and a secondary winding on a multi-layer PCB through an etching process; the primary winding and the secondary winding are alternately arranged in different layers of the PCB, and an even-number-layer symmetrical laminated structure is adopted for layout; a flaky soft magnetic material with high magnetic conductivity is selected as a magnetic core, and the magnetic core is embedded into the slotting area of the PCB to be fixed; a grounding shielding layer is inserted between the adjacent winding layers; a heat conduction via hole array is arranged in a winding area of the PCB, heat generated by a winding layer is conducted to a large-area heat dissipation copper foil on the bottom layer of the PCB, and a vertical heat dissipation channel is formed. According to the planar flyback transformer, the windings are etched on the multi-layer PCB, the alternating symmetrical layout is adopted, the magnetic core is embedded, and the shielding layer and the heat conduction via hole array are arranged, so that the integrated design of the planar flyback transformer is realized.

The objective of the present invention is to achieve downsizing of a power-receiving coil unit including a power-receiving coil.　A power-receiving coil unit (60) comprises: a first power-receiving coil (34a); a ferromagnetic first core member (65) having a first base part (65b) and a core part (65a) that protrudes to one side of the first base part and passes through the first power-receiving coil; a substrate (66) disposed on the other side of the first base part; and a transformer in which a primary-side coil is configured by wiring formed on the substrate. The first core member constitutes a part of the transformer core.

To provide a coil device having a simple configuration and high heat dissipation.SOLUTION: A coil device 1 includes a bobbin 2, a first winding part disposed on an outer peripheral surface of the bobbin 2, a second winding part 40 disposed directly or indirectly on an outer peripheral surface of the first winding part, a first core 5a and a second core 6a attached to the bobbin 2, a case 8 that houses at least the bobbin 2, and a synthetic resin filled in the case 8. The first core side 5a has a first base portion 50 and a pair of first outer leg portions 51 that protrude from the first base portion 50 and face each other in a first direction perpendicular to the axial direction of the bobbin 2. The second core side 6a has a second base portion 60 and a pair of second outer leg portions 61 that protrude from the second base portion 60 and face each other in the first direction. The first outer leg portion 51 is separated from the second outer leg portion 61 such that a gap 12 is formed between the first outer leg portion 51 and the second outer leg portion 61 in a second direction perpendicular to the axial direction of the bobbin 2 and the first direction.SELECTED DRAWING: Figure 1

The invention relates to the technical field of transformers, in particular to a signal transformer for multi-path signal coupling of a low-voltage power grid, the signal transformer comprises a magnetic core, an inlet wire winding and an outlet wire winding, efficient electromagnetic coupling and isolation of multi-path signals are achieved through the magnetic core, and a main control chip can send control signals to equipment through a driver and a coupling winding. And receiving an equipment feedback signal. The system can extract characteristics of a control signal and a feedback signal in real time, dynamically calculate a comprehensive crosstalk index, and adaptively adjust parameters of a receiving filter and a driver according to the comprehensive crosstalk index, so that signal crosstalk caused by physical coupling among multiple channels is effectively inhibited. According to the scheme, the structure is simplified, the system cost is reduced, the communication quality and the anti-interference capability of multiple paths of signals in a low-voltage power grid are remarkably improved, and the system is suitable for multiple occasions such as high-reliability power line communication.

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.

A power conversion device is provided. By optimizing the winding manner of the high-voltage winding and the low-voltage winding and the layout of corresponding components, the output capability of the power conversion device is improved, and the loss on the energy transmission path is reduced; On the other hand, by means of the assembly structure of the first substrate and the second substrate, a winding is provided on the second substrate, and the magnetic core is assembled to the second substrate from the upper surface and the lower surface of the second substrate, respectively; a hole groove is provided on the first substrate, and the hole groove is used for accommodating an upper magnetic plate of the magnetic core assembly; thus, the volume of the power conversion device is further reduced, and the height difference of the main heating element is reduced, thereby achieving a low thermal resistance.

The invention provides an inductance element and a manufacturing method thereof, the inductance element comprises an electrode and a magnetic core, a metal transition layer is arranged between the electrode and the magnetic core, the metal transition layer and the electrode are connected in a metallurgical bonding mode, and the metal transition layer and the magnetic core are connected in a metallurgical bonding mode. The inductance element can prevent the interface between the magnetic core and the copper wire from cracking, and the product performance is excellent.

The invention relates to soft magnetic metal particles, soft magnetic metal powder, a magnetic core, a magnetic component, and an electronic device. The soft magnetic metal particle includes a metal particle and a film covering the metal particle. The coating film contains at least an oxide of X1, an oxide of X2, and Mg. And X1 is Fe, Co or Ni. And X2 is P, Si, B, Na, Al, Ca, Bi, Ba or Zn. The coating film includes a first coating portion in contact with the metal particles, and a second coating portion in contact with the first coating portion. The first coating portion is a portion in which the atomic concentration of X1 is equal to or greater than the atomic concentration of X2. The second coating portion is a portion in which the atomic concentration of X1 is lower than the atomic concentration of X2. The maximum point of the atomic concentration of Mg is included in the coating film, and [Mg] / [X1] is 0.05-2.00 (inclusive) where [Mg] is the atomic concentration of Mg at the maximum point and [X1] is the atomic concentration of X1 at the maximum point.

A circuit board includes first and second wiring patterns. The first wiring pattern electrically connects a node between switching elements to a first terminal. The second wiring pattern electrically connects a second terminal to an output capacitor. An inductor includes first and second windings, and a magnetic core. The first winding is near the circuit board. The second winding is farther from the circuit board than is the first winding, and connected in series with the first winding. The first and second windings are contained in the magnetic core. The first winding is electrically connected to the first terminal. The second winding is electrically connected to the second terminal. The first wiring pattern has an area smaller than a projected area of the inductor in physical size. The second wiring pattern has an area substantially equal to or larger than the projected area of the inductor in physical size.