78 results about "Circular coil" patented technology

The invention relates to the technical field of transformers, and particularly discloses a small-size and strong-short-circuit-current-resistant transformer, which comprises a transformer body, the transformer body comprises an iron core, a plurality of iron cores, a plurality of short-circuit-current-resistant coils, a plurality of short-circuit-current-resistant coils and a plurality of short-circuit-current-resistant coils, the insulating cylinder is arranged on the outer side of the core column in a sleeving manner; the winding sleeves the outer side of the insulating cylinder, the winding comprises a circular coil wound on the outer wall of the insulating cylinder and a plurality of layers of elliptical coils wound on the outer side of the circular coil, and the trend of the elliptical coils is parallel to magnetic lines generated by the circular coil; heat dissipation channels parallel to the axis of the core column are formed between the circular coils and the oval coils and between every two adjacent oval coils. The space of the core column can be effectively utilized, the elliptical ring can fill the external space, the magnetic field trend of the outer elliptical coil is parallel to that of the inner circular coil, high-frequency loss caused by the proximity effect and eddy-current loss during short circuit can be effectively reduced, and the normal operation efficiency and short-circuit endurance capacity of the transformer are improved.

The invention provides an anti-offset magnetic coupling mechanism for a wireless charging system of an unmanned aerial vehicle, the magnetic coupling mechanism comprises a transmitting end arranged on a landing platform and a receiving end mounted on the unmanned aerial vehicle, and a transmitting coil is a double-layer circular coil wound at gradient intervals; an axial magnetic field which is uniformly distributed is formed through a non-uniform distribution structure of coil turn spacing; the receiving end is composed of four sets of same magnetic core-coil structures, each set is composed of a lightweight cylindrical novel soft magnetic composite material magnetic core and an externally-wound solenoid coil of a vertical landing gear of the unmanned aerial vehicle, the magnetic cores are located in the vertical landing gear of the unmanned aerial vehicle, and the coils of the four magnetic core-coil structures are closely wound in the axial direction of the outer surface of the landing gear and connected in series. And coil and magnetic core parameters are designed by using an evolutionary algorithm. The problems that in a traditional scheme, the anti-offset capacity is weak, the magnetic core weight is large, and the receiving end is not matched with the special-shaped structure of the unmanned aerial vehicle are solved, and the method is suitable for unmanned aerial vehicle wireless charging scenes.

A hydraulic motor pump unit for pressurising a hydraulic fluid in a hydraulic circuit. The motor pump unit includes a motor having a motor stator holding a circular array of coils and a motor rotor having a motor rotor body having an outer circumferential rotor surface holding a circular array of magnets. The motor rotor body is positioned within the motor stator holding the magnets opposite the coils. A pump is drivable connected to the motor rotor. A housing body provided with a pump chamber for housing the pump and a cylindrically shaped coil support for supporting the circular array of coils. The housing comprises at least one housing end cap which is connected to the coil support which housing end cap is provided with a fin pattern for an air cooling of the housing to an environment.

The invention relates to a rapid calculation method and system for a space magnetic field of a circular coil. The method comprises the following steps: converting an integral expression of a Biot-Savart law into a closed analytical solution containing first and second types of complete elliptic integrals; on the basis of an analytical expression of elliptic integration, the magnetic field intensity and direction generated by the coil at any point in the space can be efficiently and precisely calculated, and the defects that traditional finite element simulation calculation is complex, consumed time is too long, and efficiency and precision of a direct numerical integration method are difficult to consider at the same time are overcome. The method is particularly suitable for application scenes such as WPT system design, multi-transmitting-coil amplitude-phase control optimization and real-time simulation which need to carry out rapid and frequent calculation on the magnetic field. According to the method, full-automatic rapid calculation from physical parameter input to magnetic field result output is achieved, the core advantage of the method is that an analytical formula is utilized, the tedious process of numerical simulation and integration is avoided, and the calculation efficiency is remarkably improved while high precision is guaranteed.

The utility model relates to an air-cooled electromagnetic stirrer inductor for an aluminum melting furnace, which comprises an inductor body, an air duct device is arranged at the bottom of the inductor body, and the inductor body is covered by a ventilated frame; the inductor body comprises a pressing plate and N ring-shaped coils, and all the coils are regularly arranged in a line; each coil encloses a corresponding silicon steel sheet unit; each silicon steel sheet unit comprises a plurality of silicon steel sheets which are arranged at intervals and arranged in a row, and a partition plate is arranged between every two adjacent silicon steel sheets. The silicon steel sheet units and the pressing plates are connected through a plurality of screw rods which transversely penetrate through the silicon steel sheet units and the pressing plates; ngt; = 2. The product is simple in structure and convenient to operate, does not need a cooling water system, cools the inductor body through blowing of the fan, omits a complex cooling water system, and is energy-saving and consumption-reducing.

Wireless power transmission coupling mechanism on high-voltage line insulators and manufacturing method thereof. The main body of the mechanism includes a transmitting end and a receiving end; both the transmitting end and the receiving end include a spiral circular coil and a magnetic core; wherein, the magnetic core is composed of uniformly distributed support frames and magnetic core rings with the same spacing, and the height of each is the same as the height of the coil; the inner side of the smallest magnetic core ring is fixed on the insulator fitting, and the outer side of the largest magnetic core ring is closely attached to the inner wall of the coil; the optimal number of support frames and magnetic core rings is selected according to the simulation results; it is verified that the addition of this coupling mechanism will not damage the insulation performance of the high-voltage transmission line. The invention is applied to a wireless power transmission system for spanning the insulator distance on a high-voltage line, the coils can be fixed at both ends of the insulator, and at the same time, the mutual inductance of the coils is significantly increased, effectively improving the transmission performance of the system.

The invention discloses a winding method of a wire for a valve reactor, and provides a winding device and a winding coil pattern. The winding device comprises a winding base, a winding tower block, a winding wheel assembly and a block-up block, and the winding base comprises a winding base body, a winding station and a limiting hole. And each winding station is provided with a limiting hole. And each winding tower block comprises a winding tower block main body and an insertion hole. The winding wheel assembly comprises a winding frame, a winding shaft and a winding wheel. And the plurality of limiting holes are respectively formed in each corner position of a wound coil pattern. According to the winding method of the wire for the valve reactor, a winding tower block is arranged at each corner of a non-circular coil, each winding tower block is independent, the height of each winding tower block is superposed according to the number of winding turns, all towers do not interfere with each other in the winding process, the winding method is suitable for winding non-circular coils of different shapes, the quality stability of the coils is guaranteed, and the winding efficiency is improved. The labor intensity of workers is reduced, and the machining efficiency is improved.

The application discloses a composite diamagnetic coil for a magnetic confinement fusion device and a system thereof. The composite diamagnetic coil uses the core and the skin of a coaxial coil as a concentric circular coil and a compensation coil respectively, so that the measurement positions of the two sets of coils are consistent, and the concentric circular signal is compensated by the compensation coil, thereby reducing the measurement error while reducing the workload of eddy current compensation.

A system and a method for voltage-controlled oscillator (VCO are disclosed. A first VCO core includes a first cross-coupled (CC) transistor pair having a first conductivity type and a second cross-coupled transistor pair having a second conductivity type. A second VCO core includes a third CC transistor pair having the first conductivity type and a fourth CC transistor pair having the second conductivity type. A first synchronization trace connects the first CC transistor pair to the third CC transistor pair. A second synchronization trace connects the second CC transistor pair to the fourth CC transistor pair. The first and second VCO cores are arranged on a circular path on a substrate and disposed opposite with each other with respect to a center of the circular path.

The utility model discloses a stack guide vehicle with a stack coil clamp, which comprises the stack coil clamp and an AGV body, the stack coil clamp comprises a stack coil material taking assembly, a stack coil support and a stack coil driving assembly, and the stack coil material taking assembly is connected with the stack coil driving assembly; the stacking and rolling driving assembly and the stacking and rolling material taking assembly are assembled on the stacking and rolling support, and the stacking and rolling support is connected with the AGV body. The guiding vehicle can flexibly adapt to automatic carrying and stacking of circular coil stocks of different specifications, so that the problems that in the prior art, in the automatic carrying and stacking process of the circular coil stocks, flexibility and adaptability are lacked, materials of irregular shapes and variable sizes cannot be efficiently treated, and the working efficiency is high are solved. And the accuracy and the automation level are low.

A system and a method for voltage-controlled oscillator (VCO are disclosed. A first VCO core includes a first cross-coupled (CC) transistor pair having a first conductivity type and a second cross-coupled transistor pair having a second conductivity type. A second VCO core includes a third CC transistor pair having the first conductivity type and a fourth CC transistor pair having the second conductivity type. A first synchronization trace connects the first CC transistor pair to the third CC transistor pair. A second synchronization trace connects the second CC transistor pair to the fourth CC transistor pair. The first and second VCO cores are arranged on a circular path on a substrate and disposed opposite with each other with respect to a center of the circular path.

The invention discloses a transcranial magnetic stimulation coil with a three-dimensional structure and a transcranial magnetic stimulation array, is applied to the technical field of transcranial magnetic stimulation, and aims to solve the problem that the influence of eccentricity on coil performance is not considered in the prior art. The invention provides an eccentric inverted-cone-shaped three-dimensional structure coil. The inverted-cone-shaped coil is formed by stacking a plurality of layers of circular coils with certain inclination angles and different specifications in the vertical direction. The radiuses of the coils in each layer are sequentially increased from bottom to top, the central axes of the coils in each layer are not aligned and have horizontal offset, the central axes of all the coils incline along the horizontal axis, and the inclination angles are the same; the effects that the coil has a small projection area on the scalp surface and has good focusing capacity and stimulation depth can be achieved.

The present invention discloses a pipe welding device, which relates to the field of welding devices and includes a base, on which two side plates are mounted via a slide, and work plates are rotatably mounted on the tops of the two side plates. The sides of the two work plates that are close to each other pass through a rotating shaft. When the two side plates are close to each other, the work plates form a V-shaped structure under their own gravity. The upper sides of the two work plates are each provided with a groove, and a semi-cylindrical ring is mounted inside the groove. A semi-circular coil is mounted inside the semi-cylindrical ring. The two semi-cylindrical rings can be snapped together to form a complete cylindrical ring. The semi-circular coils are combined into a complete coil structure, which can generate an eddy current magnetic field when energized. When welding a pipe, the present invention can directly heat the weld of the pipe, thereby improving the firmness of the weld. When in use, the semi-cylindrical rings only need to be spliced ​​into a cylindrical ring to achieve heating of the pipe. The use is very convenient, and the semi-cylindrical rings can be used alone to meet different usage conditions.

The utility model relates to a kind of long circular coil straightening tool in coil straightening technical field, including bearing table, X-axis straightening assembly and Y-axis straightening assembly, the bearing table middle part is equipped with the X-axis let room slot that passes through up and down and the Y-axis let room slot that passes through up and down, the X-axis let room slot is equipped with two along Y-axis let room slot symmetry;The straightening assembly includes slide rail, the slide rail each section has a pair of synchronous and opposite moving direction shaping part, and a pair of shaping part is connected with movable pad by elastic member, to support the area of coil corresponding let room slot;The utility model is equipped with X-axis straightening assembly and Y-axis straightening assembly, and the shaping part of a pair of synchronous opposite moving direction driven by combination bidirectional screw rod, the inner ring and outer ring of coil can be synchronously pressed and straightened;Effectively solve the problem that coil inner ring cannot be shaped in prior art, avoid coil installation difficulty caused by inner ring warping, wrinkle or protrusion.

A wire winding device for valve reactors includes a winding base, winding tower blocks, a winding wheel assembly, and a shim block. The winding base includes a main body, winding stations, and positioning mounting holes. Each winding station has a positioning mounting hole. Each winding tower block includes a main body, a insertion hole, and a winding groove. The winding wheel assembly includes a winding frame, a winding shaft, and a winding wheel. This wire winding device for valve reactors sets a winding tower block at each corner of a non-circular coil. Each winding tower block is independent, and its height is stacked according to the number of winding turns. During the winding process, each tower block does not interfere with the others. It is suitable for winding non-circular coils of different shapes, ensures the quality stability of the coil, reduces the labor intensity of workers, and improves processing efficiency.

This electromagnetic device comprises: an annular coil bobbin; and a core provided with an annular accommodation part in which the coil bobbin is accommodated. The inner circumferential surface of a trunk section of the coil bobbin is provided with a first engagement part. The outer circumferential surface of a central protrusion that demarcates the accommodation part is provided with a first locking part that locks the first engagement part.

The application relates to a high-offset-tolerance unmanned aerial vehicle wireless charging coupling mechanism and an optimization method, and belongs to the technical field of high-offset-tolerance unmanned aerial vehicle wireless charging. The mechanism comprises a compensation coil and a composite circular coil, the compensation coil and the composite circular coil are connected in series to form a single-current loop, the composite circular coil comprises a large circular coil and a small circular coil, and the large circular coil and the small circular coil are connected in series in the same direction. Through the mutual complementation mechanism of the magnetic flux change increase and decrease of the strong magnetic field characteristics of the edge of the compensation coil and the strong magnetic field characteristics of the center of the double circular coil, the mutual inductance fluctuation rate is less than or equal to 5% under the offset working condition of the receiving end, the traditional scheme is greater than or equal to 25%, the effective offset tolerance is increased to 35% of the diameter of the transmitting end, that is, 140mm / Phi400mm, which is 2.1 times larger than the traditional single-polarity structure; the structure breaks through the magnetic field distribution limitation of "strong center and weak edge", and solves the power stability fluctuation problem caused by horizontal offset.

The present application discloses a method and apparatus for generating a coil model. The method includes: constructing a second coil and a third coil; cutting the second coil perpendicular to the direction of current flow to obtain a third section and a fourth section of the second coil; cutting the third coil perpendicular to the direction of current flow to obtain a fifth section and a sixth section of the third coil; connecting the third section and the fifth section; and connecting the fourth section and the sixth section to obtain a coil model. The coil model is used to infer the electromagnetic force of a magnetic levitation system. By connecting the sections of the second coil and the third coil, respectively, the complex "8" coil structure in an actual magnetic levitation system is simulated using two basic circular coils. This results in a more accurate and faster calculation of the electromagnetic force of the magnetic levitation system derived from the coil model.

The invention discloses a wood fiber micro-nano crushing device magnetically driven by a uniform magnetic field gradient composite coil, a control method and a design method, the wood fiber micro-nano crushing device comprises a combined coil unit, and the combined coil unit is arranged on a motion track where a magnetic ball moves. The combined coil unit is formed by sequentially connecting leads of a conical coil, a circular coil and a square coil in series; the small end part of the conical coil faces the circular coil, and the wire winding directions of the conical coil and the circular coil are the same; the wire winding directions of the square coil, the conical coil and the circular coil are opposite. The magnetic field distribution of the combined coil is different from the concentrated distribution of the middle magnetic field of the traditional circular coil, so that the magnetic field intensities at different radial positions along the axial direction can be uniformly increased, the uniformity of the magnetic field gradient is ensured, and the magnetic balls at different positions are uniformly stressed; and the energy loss caused by collision among the particles is greatly reduced.

The present invention discloses an overlapping stimulation coil assembly and system for bioelectromagnetic stimulation, which relates to the field of bioelectromagnetic stimulation technology. The assembly includes a lower stimulation coil and an upper stimulation coil for vertical placement above a bioelectromagnetic stimulation target area, wherein the upper and lower stimulation coils have the same and similar geometric structure of a semicircular coil structure, the upper and lower stimulation coils are arranged overlappingly, and the arc portion of the lower stimulation coil, the arc portion of the upper stimulation coil, the straight long axis portion of the lower stimulation coil, and the straight long axis portion of the upper stimulation coil are arranged in sequence from bottom to top, and the upper and lower stimulation coils are used to respectively access excitation currents through different discharge circuits to jointly exert bioelectromagnetic stimulation on the target area. In this way, while ensuring that the stimulation intensity reaches the stimulation threshold, the focusing of the stimulation coil is improved, the stimulation depth within the skull is enhanced, the adverse effects on non-target areas are effectively reduced, and the safety of transcranial electromagnetic stimulation treatment is ensured.

The invention relates to an unmanned aerial vehicle wireless charging coupling mechanism with high anti-offset tolerance and an optimization method, and belongs to the technical field of unmanned aerial vehicle wireless charging with high anti-offset tolerance. Comprising a compensation coil and a composite circular coil, the compensation coil and the composite circular coil are connected in series to form a single current loop, and the composite circular coil comprises a large circular coil and a small circular coil which are connected in series in the same direction. Through a magnetic flux change increase and decrease complementation mechanism of the edge strong magnetic field characteristic of the compensating coil and the center strong magnetic field characteristic of the double-circle coil, the mutual inductance fluctuation ratio is smaller than or equal to 5% and larger than or equal to 25% in a traditional scheme under the offset working condition of the receiving end, and the effective offset tolerance is improved to 35% 140 mm / phi 400 mm of the diameter of the transmitting end and is increased by 2.1 times compared with a traditional unipolar structure; the structure breaks through the magnetic field distribution limitation of strong center and weak edge, and solves the problem of power stability fluctuation caused by horizontal offset.

This application discloses a method for analyzing eddy current losses on a metal plate under the excitation of a parallel-placed circular coil, relating to the field of eddy current loss calculation. The method includes solving the vector dynamic potential wave equation in cylindrical coordinates to obtain a vector magnetic potential calculation formula; determining the electromagnetic field expression of the space between the circular coil and the metal plate based on the vector magnetic potential calculation formula; ensuring the circular coil is parallel to the metal plate; obtaining the induced voltage expression on the circular coil based on the electromagnetic field expression of the plane containing the circular coil; determining an approximate formula for eddy current losses on a metal plate under the excitation of a parallel-placed circular coil based on the induced voltage expression on the circular coil; and substituting the state data of the circular coil and the metal plate into the approximate formula for eddy current losses on a metal plate under the excitation of a parallel-placed circular coil to obtain the eddy current losses on the metal plate. This application can quickly determine the eddy current losses generated when a circular coil is placed parallel to a metal plate.

The invention discloses a method and a system for predicting coil parameters of a wireless power transmission system, and relates to the technical field of coil electrical parameter calculation, finite element simulation is performed based on an established two-dimensional parameterized geometric model of a circular coil to obtain training data, and the training data is used to train an improved Gaussian process regression model to obtain a prediction result. The method comprises the steps of obtaining a coil parameter prediction model, constructing an integrated learning correction model based on the coil parameter prediction model, predicting coil geometric parameters to be predicted based on the coil parameter prediction model and the integrated learning correction model, and obtaining coil electrical parameters including alternating-current resistance, self-inductance and mutual inductance. According to the method, the coil parameters under different working conditions are efficiently predicted, the time consumption of traditional finite element simulation is reduced, the accuracy of coil alternating current resistance, self inductance and mutual inductance obtained through prediction is more effectively ensured, and therefore the coil parameters of the wireless power transmission system are accurately and efficiently predicted.

The utility model discloses a kind of annular array type arc sheet shape rhombic coil stacking positioning tool, including the center cylinder of overall cylindrical, the side wall of center cylinder is annularly provided with sliding hole, one positioning column is slidably connected in each sliding hole, and the end of positioning column away from the center axis of center cylinder is positioning end;The stacking positioning tool includes positioning state and material withdrawal state;When positioning state, the positioning end of all positioning columns is all stretched out the outside wall of center cylinder;When material withdrawal state, all positioning end is housed in sliding hole.Compared with prior art, the utility model changes the center cylinder of cylindrical into traditional planar coil stacking tool, and under positioning state, the positioning column of protruding outside center cylinder is distributed, to provide condition for realizing that multiple arc sheet shape rhombic coil is stacked along circle.In material withdrawal state, positioning column is withdrawn to center cylinder, does not affect that circular coil is along the axial direction of center cylinder and is taken out, facilitate to realize unloading.

The present invention discloses an omnidirectional pulse compression electromagnetic ultrasonic guided wave transducer based on the Lorentz force, comprising a permanent magnet array consisting of a circular coil arranged in a certain pattern and a group of sector magnets with alternating polarization along the thickness direction. This structural form can excite 360° SH waves in all directions, and the uniquely distributed circular coils can simultaneously generate multiple SH wave sound sources. The coil distribution patterns of the excitation and receiving transducers are opposite, and the receiving transducer can achieve the pulse compression effect of the excitation sound wave. The pulse compression technology can improve the transduction efficiency and have a higher signal-to-noise ratio. Therefore, it is suitable for defect detection and health monitoring of various uniform, conductive, isotropic elastic plate structures, and greatly improves the monitoring accuracy and efficiency.

An electric motor as well as a manufacturing method for the electric motor and a manufacturing tool are provided, the electric motor being for a deep well vertical turbine pump and having a stator assembly that has a stator bore to hold a rotor and slots that are radially open to the inside, respectively separated from each other by a stator tooth, and in which electrical conductors made of round wire of coils of a coil assembly lie, with the distributed windings on one axial end of the coil assembly forming a winding head in which the coils are encapsulated. The winding head only extends between an inner diameter and an outer diameter which is smaller than the diameter of the stator bore in which the coil assembly is inserted axially into the slots of the stator assembly.

The application relates to the field of glass tube heaters and preparation technology thereof, in particular to a glass tube heater and an electric heating wire forming device. The glass tube heater comprises a nickel-chromium alloy electric heating wire which is wound into a non-circular cross-section coil, wherein the cross-section of the coil can be a polygon and has smooth round corners, preferably a central symmetrical hexagonal star shape, six corners are arranged along the radial direction and two edges are parallel to each other. In addition, an electric heating wire forming device for manufacturing the above-mentioned glass tube heater is also provided, which comprises an inner clamp and an outer stamping clamp, the cross-section profile of the inner clamp is the same as the cross-section inner profile of the non-circular coil, the outer stamping clamp comprises a plurality of stamping heads and a linear driving component, and a guide sleeve and a retraction cylinder. Through optimization of the electric heating wire shape and the forming process, the application improves the heating efficiency and the service life, and simplifies the production process.

The invention belongs to the technical field of coil shaping, and particularly discloses a distribution transformer long circular coil shaping device which comprises a hydraulic device, a coil assembly and a clamping device. The hydraulic device comprises a vertical plate, a baffle arranged on the vertical plate, a fixing plate and a hydraulic cylinder, the hydraulic cylinder is fixedly connected with the fixing plate through a fixing flange, the baffle is located at one end of the vertical plate, the fixing plate is located at the other end of the vertical plate, and the telescopic end of the hydraulic cylinder faces the baffle; the coil assembly comprises at least three coils which are sequentially arranged in the radial direction. The coil assembly is arranged in the clamping assembly, and the clamping assembly is arranged between a baffle and a vertical plate of the hydraulic device. The coil short shaft is pressed to the design size through the shaping device and the hydraulic device, the pressing screw is fastened, the problems that the coil short shaft winding is too large, the phase-to-phase distance is not enough due to coil sleeving, and a device body is difficult to assemble are solved, the coil radial size and the coil axial size are guaranteed, the coil mechanical strength is effectively enhanced, and the coil winding efficiency is improved. And the anti-short-circuit capability of the transformer is improved.

To implement "reduction of electrical influences", etc., from a desired cable run by grounding a conductive shield part which is at least provided on an inner peripheral side of a substantially circular core winding.SOLUTION: In a substantially circular coil part 2 of a coil material 1 which is mounted to a predetermined cable run S, a conductive shield part 3 is provided on an inner peripheral side of a substantially circular core 2a and a winding 2b, and the shield part 3 is grounded. An encapsulation part 4 in which the substantially circular coil part 2 is encapsulated by a synthetic resin or a cushion part 5 may also be included. Regarding a current sensor measurement machine 10 including a current sensor portion 11 provided with the coil material 1 and a measurement portion 12, a rating range of its measurement current is from 1 A or more to 1,800 A or less or a coil may not be included other than the coil material 1. In a coil mounting system 50, the coil material 1 in which the shield parts 3 are provided on both an inner peripheral side and an outer peripheral side of the substantially circular coil part 2 is mounted in two lines in conductors of three lines which are predetermined cable runs S disposed in parallel.SELECTED DRAWING: Figure 1

This vibration actuator comprises a plurality of actuator bodies, each having: an electromagnetic part that is formed by surrounding a core with a flat circular coil; a spring stopper part that is disposed so as to surround the electromagnetic part; a magnetic member that has a lower surface facing the core from above; a spacer that is disposed on said lower surface toward the coil outer side and that vertically separates the electromagnetic part and the magnetic member from each other; and an elastic support part that connects the spring stopper part and the spacer and that supports the magnetic member in a vertically movable manner. The plurality of actuator bodies are disposed on a plate-like magnetic base part in a similar manner with the respective cores joined to the magnetic base part and the electromagnetic parts arranged adjacent to the respective spring stopper parts.