62 results about "Planar coil" patented technology

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.

Disclosed herein is a stellarator comprising two sets of coils, namely a set of encircling coils which encircle the plasma axis, and a set of shaping coils which do not encircle any other coil or the plasma. In some embodiments, the encircling coils include a structural element to maintain their shape under magnetic forces. In some embodiments, the shaping coils are mounted onto one or more structural elements which, together with the shaping coils, constitute a field shaping unit. Also disclosed is a controller which may modify the electrical current flowing in one or more subsets of the coils in order to achieve target plasma parameters. Also disclosed is a method of designing a set of shaping coils by discretizing a surface dipole or current potential distribution.

This application discloses a torque detection device, comprising: a strain gauge for deforming under torque; a first strain gauge fixed on the strain gauge, the permeability of which varies with the strain applied to it; a circuit board having at least one first planar coil and the same number of second planar coils as the first planar coil; a second strain gauge disposed on the side of the circuit board away from the first strain gauge, and having the same structure and material as the first strain gauge; and a dielectric layer disposed between the circuit board and the second strain gauge; wherein the first planar coil is disposed opposite to the first strain gauge; the second planar coil is disposed opposite to the second strain gauge; and the thickness and dielectric constant of the dielectric layer are set such that the inductance parameter of the second planar coil responds to temperature changes in a manner that matches the inductance parameter of the first planar coil responds to temperature changes.

The invention provides a sensing system integrating torque detection and angle detection, and the system comprises a strain body which is used for generating deformation when bearing a torque; the strain gauge is fixed on the strain body, the strain gauge is made of an inverse magnetostrictive material, the magnetic conductivity of the strain gauge changes along with the strain borne by the strain gauge, and the strain gauge is provided with a preset patterned structure; the angle coding structure is arranged on the strain body; the circuit board is provided with at least one planar coil and an angle sensing assembly; wherein the planar coil corresponds to the patterned structure in space and is used for detecting the magnetic conductivity change of the strain gauge so as to obtain torque information; the angle sensing assembly corresponds to the angle coding structure in space and is used for acquiring angle information of the strain body.

The application belongs to the technical field of axial flux motors, and particularly relates to a coreless PCB stator winding for an axial flux motor, a stator assembly and an axial flux motor, wherein the coreless PCB stator winding comprises at least one winding unit, the winding unit comprises a first annular substrate and a second annular substrate, and the front surface and the back surface of the two annular substrates jointly form four conductor layers, each conductor layer has conductor wires constituting a planar coil in a corresponding sector; the planar coil comprises a conductor action edge and a conductor connection edge, and the planar coils in different conductor layers are staggered and arranged in a mirror image, staggered and filled with a complementary position; the conductor action edge in the third conductor layer is located in a gap region between the front two planar coils; the application can improve the conductor utilization rate in the effective magnetic flux cutting region, and improve the interlayer conduction and current distribution performance of the multi-layer winding.

The utility model discloses a three-dimensional coil structure which is applied to a multi-layer circuit board and comprises a three-dimensional coil unit, the three-dimensional coil unit is arranged on the side edge of a target device on the circuit board in a surrounding mode, the three-dimensional coil unit comprises horizontal wiring units and vertical through hole units, the horizontal wiring units are arranged on the top layer and the bottom layer of the circuit board, and the vertical through hole units are arranged on the top layer and the bottom layer of the circuit board. The horizontal wiring unit is used for forming a horizontal edge of the three-dimensional coil, and the vertical through hole unit penetrates through the circuit board, is connected with the horizontal wiring unit and is used for forming a vertical edge of the three-dimensional coil. The three-dimensional coil unit is arranged around the side edge of the target device, and the horizontal wiring unit and the vertical through hole unit are combined to form the three-dimensional coil structure, so that the coverage area of a magnetic field in the side edge area of the device is enlarged, and the limitation of a traditional planar coil structure is made up; the three-dimensional coil unit can form a complete magnetic field and a good filtering effect on the side edge of the device, and a planar coil magnetic field structure does not need to be reinforced by additionally adding components and a complex circuit structure.

The invention discloses a spring oscillator device based on a planar coil, and belongs to the technical field of mechanical vibration. The top end of a vibration rod is in contact with a cable, and the bottom is connected with a sleeve; the sleeve is fixedly connected with the upper cover plate; an exciting coil insulating plate, a fixed coil insulating plate and a bottom supporting plate are sequentially arranged below the upper cover plate; the limit spring sleeves the impact rod, the bottom of the limit spring is fixedly connected with the middle of the excitation coil insulating plate, and the limit spring and the impact rod are slidably arranged in the limit hole and the sleeve of the upper cover plate; the upper end of the guide polish rod penetrates through a sliding hole of the excitation coil insulating plate and is connected with the upper cover plate, and the bottom is fixedly connected with the fixed coil insulating plate; an exciting coil is arranged in the exciting coil insulating plate, and a fixed coil is arranged in the fixed coil insulating plate. Based on the electromagnetic induction principle, when electrified, the exciting coil and the fixed coil generate variable magnetic fields in opposite directions, the exciting coil vibrates up and down under the combined action of electromagnetic force and gravity, cleaning operation is achieved, cost is low, efficiency is high, safety is higher, and damage to cables is small.

The invention provides a modular reconfigurable active compensation system and a planar coil segmentation design method based on stream function superposition and optimization, relates to the field of electromagnetic compensation, and solves the problems of low space utilization rate, large weight, weak installation adaptability, low cost and the like caused by the fact that a traditional overall stream function compensation coil is inseparable and poor in flexibility and depends on a whole board substrate. And the problems of complex manual winding process, poor consistency, small effective compensation area and insufficient magnetic field uniformity caused by insufficient consideration of the boundary mirror image effect of the magnetic shielding chamber are solved. Through an algorithm design process, a bulk flow function coil pattern which is difficult to divide traditionally is decomposed into a plurality of discretized sub-coil modules which can be independently manufactured, flexibly arranged and electrically connected, so that high-performance magnetic field compensation is realized, and meanwhile, the aims of system light weight, high space utilization rate and reconfigurability are fulfilled.

The utility model relates to the technical field of electroacoustics, concretely is a kind of low-frequency amplitude enhancement and welding plate conjoined annular coil plane diaphragm, including one annular diaphragm frame, and diaphragm frame is set in the diaphragm unit, diaphragm unit is equipped with plane coil unit;Diaphragm unit includes first diaphragm and the combined second diaphragm concentric with first diaphragm, the outer diameter of second diaphragm is wider than first diaphragm, and the rigidity of first diaphragm is greater than second diaphragm;The outer edge of diaphragm frame is equipped with the flexible circuit board electrically connected with two plane coil arrays, and the end of flexible circuit board away from diaphragm frame is equipped with a pair of connecting pad.The amplitude of second diaphragm in the utility model will be significantly greater than first diaphragm, to significantly improve the low-frequency performance of diaphragm, still through flexible circuit board, connecting pad is extended to the outside of diaphragm frame, it is convenient to connect audio signal line, also can utilize earphone internal space, more convenient assembly.

The application relates to the technical field of wireless charging of electric vehicles, and particularly discloses a static wireless charging position adaptive control method and system for electric vehicles, wherein the control method comprises the following steps: acquiring the lateral offset distance of the electric vehicle; judging whether the lateral offset distance is smaller than a first preset distance; if yes, controlling the magnetic coupling mechanism to switch to a double-coil coupling mechanism; if not, controlling the magnetic coupling mechanism to switch to a three-coil coupling mechanism comprising a relay coil; the transmitting coil, the relay coil and the receiving coil all adopt annular planar coils, and the transmitting coil is located in the central blank area of the relay coil. The application combines the characteristics that the two-coil structure has high efficiency when the offset distance is short and the three-coil structure has high efficiency when the offset distance is long, adds a switchable relay coil in the coupling mechanism, and optimizes the radius of the relay coil, so that the system efficiency is always kept at a high level within the allowable range of the lateral offset distance.

A planar coupler design method based on an electromagnetic force analysis model includes the following steps: determining the planar coupler design specifications and parameters according to the application scenario of wireless power transmission in a microgravity environment; establishing a planar coupler model based on electromagnetic force analysis according to the initial parameters; calculating the mutual inductance value and the corresponding number of coil turns in the initial design parameters of the planar coupler; adjusting the initial number of coil turns and the corresponding operating frequency; and adjusting the distance between the planar coupler core and the coil. This invention establishes an electromagnetic force model of the planar coupler regarding its performance parameters, fully utilizing the structural information of the planar coupler; adjusting the number of coil turns and the operating frequency reduces the electromagnetic force of the planar coupler while maintaining the same wireless power transmission power; and adjusting the distance between the planar coil and the core effectively reduces the electromagnetic force and further improves the coupler stability.

In a coil component, heat radiation around a through conductor is improved. In the coil component, since the cross-sectional area of the inner end portion of the planar coil is designed to be relatively large, heat generated in the through conductor is easily transferred to the inner end portion. Since heat is efficiently transferred from the through conductor to the inner end portion, high heat radiation around the through conductor is achieved.

The utility model provides a rotating speed sensor, which comprises a magnetizer or a permanent magnet extending along the axial direction and a planar coil assembly sleeved on the periphery of the magnetizer or the permanent magnet, and the planar coil assembly comprises a load body made of insulating materials and a planar spiral coil etched on the load body. The load body is provided with a through hole in the center of the plane spiral coil, and the magnetizer or the permanent magnet is arranged in the through hole in a penetrating mode. According to the rotating speed sensor, the output consistency is greatly improved, and the reliability of the rotating speed sensor under high-temperature and high-vibration conditions is improved.

The application relates to the technical field of sensors, in particular to a high-precision linear displacement and angular displacement system which comprises a metal object moving target, a detection device, a PCB circuit board and a planar coil, the planar coil is printed on the PCB circuit board, the planar coil comprises a transmitting coil and a receiving coil, the transmitting coil and the receiving coil are connected with the detection device, the transmitting coil comprises a transmitting coil one and a transmitting coil two, the receiving coil comprises an A-group receiving coil one and an A-group receiving coil two and a B-group receiving coil one and a B-group receiving coil two, the application is resistant to temperature drift, is very small in influence on environmental temperature change, is in time in signal response, is very suitable for dynamic signal detection, is stronger in anti-interference, is resistant to severe environment, is convenient for on-site debugging and software upgrading, is modularized in hardware, and is more suitable for hardware module replacement and upgrading.

The utility model relates to the technical field of coil, concretely provides a kind of plane coil, comprising: insulating substrate, structural glue and coil.Wherein, structural glue is set to one surface of insulating substrate, or, opposite two surfaces;Coil is set to the groove of the side surface of structural glue away from the insulating substrate;Wherein, the depth-width ratio of coil is greater than or equal to 2.5:1.The plane coil provided by the utility model can improve the depth-width ratio of plane coil, further can improve the current carrying capacity, inductance and magnetic flux of coil, provides a disruptive solution for miniaturized electronic system.

The present application relates to the technical field of coils, and specifically relates to a coil unit, a coil winding, and a magnetic component. The coil unit comprises a plurality of planar coils formed by winding strip conductors; each planar coil comprises a coil body, and a first connection segment and a second connection segment which are connected to two ends of the coil body in a winding direction; the plurality of planar coils are stacked in the thickness direction of the strip conductors; each two adjacent planar coils are spaced apart to form a heat dissipation channel. By means of the heat dissipation channels, the heat exchange coefficient of the coil unit, the coil winding and the magnetic component can be increased, thereby reducing temperature rises. The first connection segments of all the planar coils are connected, and the second connection segments of all the planar coils are connected, so as to reduce the skin effect and the resistance of the coil unit while ensuring good contact between end portions of the multi-layer planar coils, thereby reducing the loss of coil windings and magnetic components, and helping to improve the reliability of the coil windings and the magnetic components.

This application relates to a voltage-controlled oscillator (VCO) device. One device includes a first planar coil (202) and a second planar coil (204). The first planar coil (202) includes a first plurality of conductive loop segments (210a, 210b) concentric with each other and centered on a first axis (207). The first axis (207) is laterally spaced a first distance from a first side of a plane (260), and the first axis extends parallel to the plane. The second planar coil (204) is coupled to the first planar coil (202). The second planar coil (204) includes a second plurality of conductive loop segments (214a, 214b) concentric with each other and centered on a second axis (209). The second axis (209) extends parallel to the first axis (207) and is laterally spaced the first distance from a second side of the plane (260). The second side is opposite to the first side. The first planar coil (202) and the second planar coil (204) are symmetrical about the plane (260).

The invention discloses a non-planar coil electromagnetic characteristic simulation method based on a superconducting bunched cable. Relates to the technical field of superconducting magnet electromagnetic simulation. According to the method, a non-planar coil three-dimensional model is firstly built to solve the configuration distribution of a magnetic field, the minimum boundary and section position of the magnetic field are determined, grid independence verification is carried out, local critical current is evaluated by using a self-consistent model after coordinate migration, and the minimum value of the local critical current of each section is taken as global critical current. The problems of high simulation degree of freedom and poor convergence of the coil are effectively solved, electromagnetic characteristics such as critical current and the like can be accurately simulated, and technical support is provided for design optimization and safe operation of the non-planar coil based on the superconducting bunched cable.

A device comprising a first planar coil and a second planar coil. The first planar coil includes a first plurality of conductive loop segments that are concentric with one another and centered on a first axis. The first axis is spaced laterally from a first side of a plane by a first distance, and the first axis extends in parallel with the plane. The second planar coil is coupled to the first planar coil. The second planar coil includes a second plurality of conductive loop segments that are concentric with one another and centered on a second axis. The second axis extends in parallel with the first axis, and is spaced laterally from a second side of the plane by the first distance. The second side is opposite from the first side. The first planar coil is symmetric to the second planar coil about the plane.

The invention provides a control method of a spring oscillator based on planar coil driving, which belongs to the technical field of mechanical vibration, is realized based on the spring oscillator, and comprises a vibration mechanism, an excitation coil, a fixed coil, an excitation coil insulating plate, a fixed coil insulating plate, a main control chip, a boost energy storage unit, a controlled energy release unit, a remote control unit and a protective shell, by controlling the action time and the action sequence of all the components, the action of the whole spring oscillation generator is controllable, and then the spring oscillation generator based on planar coil driving is controlled. When electrified, the exciting coil and the fixed coil generate variable magnetic fields in opposite directions, and the exciting coil generates vertical vibration under the combined action of electromagnetic force and gravity. The coil and the spring are excited to vibrate up and down under the action of electromagnetic force, so that the device and the cable are driven to vibrate, and cleaning operation is achieved; the cable cleaning device is low in cleaning cost, high in efficiency, safe and small in cable damage.

The application discloses a wireless power transmission coupling mechanism, which comprises a magnetic core and a plurality of coils which are located in different planes and connected in sequence, four coils in each plane each comprise an inner coil unit and an outer coil unit which are composed of Litz wires, and the outer coil unit and the inner coil unit are coaxial and coplanar; the single-plane cross series coils and the multi-plane same-direction series coils of the plurality of coil units are used to reasonably configure the current directions of the coils in a single plane and the coils in different planes, to enhance the self-inductance of the coils per unit area, to improve the transmission power energy of the coils, and to avoid the magnetic field coupling between the multi-plane coils, and the control difficulty of the coils is reduced.

This invention provides a multi-objective optimization method for nonplanar coils in stellarators and a stellarator magnet. The optimization method includes: obtaining the initial structure of multiple nonplanar superconducting coils based on the magnetic field configuration data of the target plasma; constructing an objective function based on the target magnetic field parameters, engineering constraint parameters, and material constraint parameters of the configuration data, wherein the engineering constraint parameters include the engineering limiting geometric parameters of the nonplanar superconducting coils, and the material constraint parameters include the limiting current carrying capacity of the nonplanar superconducting coil material; minimizing the objective function to obtain optimized coil data; and solidifying the multiple nonplanar superconducting coils based on the optimized coil data to obtain optimized models of multiple nonplanar superconducting coils. The optimization method of this invention constructs a three-dimensional constraint system of "magnetic field matching - engineering feasibility - material safety," avoiding the problem of engineering implementation failure.

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 invention relates to a device (4) for the magneto-optical determination of a current (I) through an electrical conductor (6), comprising: a light source (12) configured to generate a light signal; a receiving unit (16) configured for converting an optical signal into an electrical signal; a glass coil (8) configured to establish an optical connection between the light source (12) and the receiving unit (16); and an evaluation unit (18) configured for determining the current (I) on the basis of the polarization of the received optical signal. In order to be able to be implemented more easily and to be able to measure lower currents, it is proposed that the glass coil (8) is designed as a planar coil which is arranged in such a way that the electrical conductor (6) is arranged to extend in the region of the center (24) of the planar glass coil (8).

The utility model provides an electromagnetic marine coating corrosion defect detection system which comprises an alternating current signal generator, a three-coil differential metal layer thickness measuring sensor, a signal processor and a data collector, and the alternating current signal generator and the three-coil differential metal layer thickness measuring sensor are both connected with the signal processor. The signal processor is connected with the data collector and comprises a lock-in amplifier and an operational amplifier; the three-coil differential metal layer thickness measuring sensor comprises a filter capacitor, an excitation coil and a detection coil, the detection coil comprises two planar coils connected in series, and the excitation coil is tightly attached to the lower portions of the two planar coils and is used for being electromagnetically coupled with the detection coil to obtain information of the three-coil differential metal layer thickness measuring sensor. Energy is transmitted to the three-coil differential metal layer thickness measurement sensor, the filter capacitor is connected in parallel with the two planar coils which are connected in series, and the parallel capacitor can filter part of noise generated by external interference in the measurement process of the thickness measurement system.

A wireless charger includes an upper housing assembly and a lower housing assembly. A plurality of support planes, such as an upper housing support plane, a coil support plane, a magnet support plane, a circuit board support plane, and the like, are provided in the lower housing assembly. The upper housing support plane supports the upper housing assembly. The coil support plane supports a magnetic sheet coil. The magnet support plane supports a limiting magnet and a heat dissipation ring. The circuit board support plane supports a circuit board. The plurality of support planes in the wireless charger support the components at different positions, avoiding the components from being stacked together. If the wireless charger is subjected to an external force, the components stacked together will be damaged, thereby reducing the reliability of the wireless charger.

The embodiment of the utility model provides a knob device and electronic equipment. The knob device comprises a base, a knob and an inductance device; the knob is rotationally connected with the base and comprises a plurality of conductive parts, and the plurality of conductive parts are arranged at intervals in the circumferential direction of the knob; the inductive device is fixed to the base and comprises a plurality of inductive coils, the inductive coils are arranged in the circumferential direction of the rotary knob, and each inductive coil comprises N planar coils which are arranged in a stacked mode in the axial direction of the rotary knob; when the rotary knob rotates relative to the base, the area of an opposite area of the at least one conductive part and the at least one inductance coil in the axial direction of the rotary knob changes, the opposite area has the width L in the radial direction of the rotary knob, the distance S is formed between the conductive part and the inductance coil in the axial direction of the rotary knob, and the rotary knob device meets the condition that S is smaller than or equal to NL / 18. The knob device is high in detection accuracy.

A voice coil motor is provided in the disclosure. The voice coil motor includes a frame, a magnetic member disposed at the frame, a coil assembly received in an inner cavity of the frame, a first resilient member, a planar coil, and a base. The magnetic member is disposed around the coil assembly. The planar coil is disposed on the base. The frame is disposed on the planar coil. The first resilient member includes a first connection ring connected to the coil assembly and a first positioning portion. The coil assembly is connected to the frame via the first positioning portion. The first positioning portion is configured to reset the coil assembly after movement of the coil assembly relative to the frame. A positioning mechanism is disposed between the frame and the base and configured to reset the frame after movement of the frame relative to the base.

This invention belongs to the field of online monitoring technology for electrical equipment, and discloses an ultra-thin flexible sensor and system for online monitoring of inter-turn short circuits in generator rotors. The ultra-thin flexible sensor includes two flexible substrates, a sensing layer, and a shielding layer. The sensing layer is a planar coil attached between the two flexible substrates. The shielding layer covers the surface of one of the flexible substrates away from the planar coil. This invention exhibits ultra-thin and flexible structural features, enabling it to closely conform to the complex curved surfaces of generator stator slot wedges or teeth, significantly improving installation fit and online monitoring reliability.

The invention provides a parameter design method of an anti-offset unmanned aerial vehicle wireless charging system based on PT symmetry. The method is used for solving the problems of magnetic coupling coefficient change and unstable system transmission performance caused by position offset in a wireless charging process of an existing unmanned aerial vehicle. The system comprises a transmitting end and a receiving end, wherein the receiving end comprises a first receiving coil, a second receiving coil and a third receiving coil which are sequentially connected in series; the first receiving coil, the second receiving coil and the third receiving coil are all planar coils, the included angle between the first receiving coil and the second receiving coil and the included angle between the third receiving coil and the second receiving coil are adjustable, and the included angle between the first receiving coil and the second receiving coil and the included angle between the third receiving coil and the second receiving coil are all larger than 90 degrees and smaller than or equal to 180 degrees. According to the invention, the capturing area of effective magnetic flux is expanded by arranging the three receiving coils which are connected in series, so that the PT symmetrical working area of the system is expanded cooperatively, and the system can maintain constant transmission efficiency and power when offset occurs.