94 results about "Coil inductance" patented technology

A method and system for measuring distribution network system parameters based on harmonic injection, for use in a low-current grounding system containing an arc suppression coil. The system injects currents of multiple frequencies into the neutral point of the low-current grounding system through an injection source and measures the neutral point voltage. The system uses formulas to calculate and obtain the line capacitance, arc suppression coil inductance, and damping resistance parameter values ​​in the distribution network system. This application can accurately measure line capacitance, arc suppression coil damping resistance, and reactance by injecting only two frequencies of current. This method has little impact on grid operation, high measurement accuracy, and broad application prospects.

A device which provides a measure of the compliance of a vessel wall based on a change in pressure, which causes the vessel to distend. The device comprises a coil and capacitor, forming a tank circuit. The coil is expandable and positioned along a portion of the vessel so that when the portion of the vessel expands or contracts, the coil will also expand or contract, changing the area inside the coil. This change in area alters the coil inductance, and therefore the resonant frequency of the tank circuit, which can be detected externally.

The invention discloses a double-winding coil synchronous machining device for a transformer, and relates to the technical field of transformer coil machining. A guiding mechanism; the first winding assembly comprises a first lower seat body, the first lower seat body is arranged at the output end of the guiding and conveying mechanism, and a first winding module is arranged above the first lower seat body; the second winding assembly comprises a second lower seat body, the second lower seat body is arranged at the output end of the first winding assembly and on the two sides of the metal belt between the first lower seat body and the second lower seat body, and a second winding module is arranged above the second lower seat body; the transfer mechanism comprises a transfer table and a material supporting assembly; a cutting assembly; a discharging mechanism; according to the invention, the first winding can be automatically transferred to the transfer table, the first winding carries out a part of the reserved section, and the second winding assembly can wind the reserved section into the second winding, so that a single metal belt can be processed into a double-winding coil, and the voltage resistance of the inductor is higher.

The invention discloses a paper folding structure inductance type self-decoupling miniature six-dimensional force sensor, which belongs to the technical field of force sensors and comprises a base, a folding flexible circuit board, a metal shell, a communication cable, a coil inductance measuring circuit and an elastic body. The folding flexible circuit board comprises a coil array and an inductance measuring circuit, the coil array is folded on the upper surface and the four side faces of the base, the inductance measuring circuit is folded at the bottom of the base, and a communication cable is led out of the inductance measuring circuit. The metal shell is arranged above the base and surrounds the surface, except the bottom surface, of the folding flexible circuit board; an elastic body is arranged between the metal shell and the base. The elastomer converts six-dimensional force borne by the metal shell into six-dimensional displacement. According to the sensor, the characteristic that the eddy current effect is sensitive to normal displacement and insensitive to tangential displacement and rotation is utilized, self-decoupling measurement of six-dimensional displacement of the metal shell is achieved in combination with three-dimensional coil layout, and therefore self-decoupling six-dimensional force measurement is achieved, and the sensor can be integrated to the fingertip of the dexterous hand to provide endogenous tactile perception.

The invention relates to a method for calculating the power-on and power-off delay time performance of an electromagnetic valve, and the method comprises the following steps: obtaining the mass of a valve element of the electromagnetic valve, the spring stiffness and coil resistance data; establishing an electromagnetic valve equivalent circuit model, and listing a current equation; establishing an electromagnetic valve magnetic circuit mathematical model, and listing a magnetic field equation set; establishing an electromagnetic valve flow field mathematical model, and listing a flow field equation set; establishing a kinematic model of the electromagnetic valve, and listing a kinematic equation; using a finite element method to obtain a valve core electromagnetic force-displacement-current data table and a coil inductance-displacement-current data table; a finite element method is used for obtaining a valve element aerodynamic force-displacement data table; and obtaining the power-on and power-off delay time through data analysis processing and solving of the partial differential equation set. According to the method, prediction of the opening and closing delay response time of the electromagnetic valve is more accurate, visual adjustment in the simulation process is achieved, and the time for obtaining the response time of the electromagnetic valve and the test cost are greatly reduced while the preset precision requirement is met.

The invention discloses coil inductance detection equipment with a multi-angle polarization simulation function, and relates to the technical field of coil detection, and the detection equipment simulates a polarization effect through arranging three vibration units with mutually vertical vibration directions below a mounting seat. By controlling the vibration intensity in three directions and changing the included angle between the two vibration units in the horizontal direction, polarization of multiple angles and various different polarization are simulated, the control mechanism controls the adjusting mechanism according to the change of the magnetic field of the coil in the vibration process, the vibration intensity is dynamically adjusted through the adjusting mechanism, and the vibration intensity is adjusted. Therefore, the influence of vibration on inductance change when the coil works and the influence of reverse coil change on vibration are simulated, closed-loop feedback is formed, and the detection precision is improved.

The invention provides a millimeter wave radio frequency power amplifier and a millimeter wave radio frequency transceiver, in the amplifier, an input differential signal is connected to grid electrodes of an amplification tube pair transistor and an auxiliary tube pair transistor through an auxiliary tube pair transistor blocking capacitor and an amplification tube pair transistor blocking capacitor; source electrodes of the auxiliary tube pair tube and the amplifier tube pair tube are grounded. The first amplifier tube is connected with the drain electrode of the first common-gate tube and the source electrode of the first auxiliary tube; the second amplifier tube is connected with the drain electrode of the second common-gate tube and the source electrode of the second auxiliary tube; grid electrodes of the common-gate pair transistors are connected; common-gate tube grid bias voltage is connected to grids of the common-gate tube geminate transistors through the bias resistor, and the other end of the grounding capacitor is connected to the grids of the common-gate tube geminate transistors; the drain electrode of the common-gate pair transistor is connected to the shunt capacitor and the main coil inductor of the output balun, and the secondary coil inductor of the output balun is connected with a single-ended output signal. According to the radio frequency power amplifier, OP1dB of the radio frequency power amplifier can be improved under the condition that the working voltage of the power amplifier is not increased.

A kind of eddy current testing probe and method for identifying any crack and direction around hole, the probe includes a pie-shaped detection coil with middle magnetic core, the magnetic core not only ensures accurate positioning, but also uses magnetic collection effect by enhancing coil inductance, to strengthen the magnetic field inside and back of hole.The probe is also equipped with three layers of excitation coil, one layer and two layers of coil are arranged orthogonally, three layers and one layer of coil are at an angle of 135 °, realize the efficient detection of any direction crack and identify the direction of any crack defect.The flexible support of probe enables it to adapt to curved surface structure, widen the application range.The detection method uses orthogonal differential technology, uses the symmetry of hole structure to identify defects around hole, significantly improve the detection sensitivity of defects on the back and inside of hole structure.Compared with traditional surface and near-surface defect eddy current testing technology, the present application provides a more effective solution for high-precision detection of hole structure through innovative coil configuration and defect identification method.

The invention discloses a rectangular coil inductance modeling design method based on an improved mirror current method, and the method specifically comprises the following steps: 1, calculating a coil self-inductance value Lcore and a coil mutual inductance value Mcore under the condition of no magnetic core based on a rectangular coil geometric model; 2, calculating a self-inductance value of the coil with the magnetic core; and 3, calculating the mutual inductance value of the coil with the magnetic core. According to the method, the problem of large inductance error caused by a traditional coil modeling method is solved.

A pinless power plug for receiving wireless power from a pinless power jack comprises at least one secondary coil for inductively coupling with a primary coil. The pinless power plug comprises a first magnet, having an annular shape, arranged around a perimeter of the at least one secondary coil concentric and non-overlapping with the at least one secondary coil. The first magnet is configured to magnetically couple with a second magnet in the pinless power jack. The pinless power plug comprises a third magnet spaced away from and outside of the first magnet. The third magnet is configured to magnetically couple with a fourth magnet in the pinless power jack at a particular orientation.

Suppressing noise caused by motor switching. [Solution] A vacuum pump comprising a rotating body, a motor that rotates the rotating body, a radial electromagnet that generates a radial electromagnetic force on the rotating body, a displacement sensor having multiple sensor poles made of coils and measuring the displacement of the rotating body based on changes in the inductance of the coils, a power converter that converts an input DC voltage into an AC voltage to be applied to the motor, a motor driver that performs PWM control in cooperation with the power converter, an oscillator that outputs an AC voltage as a modulated input signal to the displacement sensor, and a demodulation circuit that demodulates the output signal from the displacement sensor using a synchronous detection method, wherein the carrier frequency in PWM control is four times the modulation frequency of the displacement sensor.

The invention discloses an auxiliary device and method for rapidly determining three parameters of soft magnetic composite powder, and belongs to the technical field of soft magnetic material performance testing. The invention provides a simple device and method based on a medical injector and an insulated copper wire, aiming at solving the problems that a traditional testing method depends on complex equipment, steps are tedious, the cost is high and the efficiency is low. By measuring the inductance and the resistance of the coil and combining calculation of the size of an inner cavity of the injector and the length of a magnetic circuit, the quality factor, the effective magnetic conductivity and the direct-current bias of the soft magnetic powder can be quickly and accurately calculated. The device is simple in structure, mainly comprises an injector, an insulated copper wire, soft magnetic powder and an insulated rubber tape or transparent adhesive tape, and is convenient to operate and low in cost. The method is especially suitable for rapid quality detection of a production field and preliminary performance evaluation of a laboratory, can significantly improve the test efficiency and reduce the test cost, and has the advantages of simplicity, rapidness, low cost and high applicability.

The utility model relates to the technical field of welding, and discloses a weld joint single-face induction heating device, which comprises at least one induction working part, the induction working part is controlled by a control cabinet to work, the induction working part comprises an induction coil and a framework for supporting the induction coil, an electric wire in the induction coil is a nickel-plated copper wire, and the framework is arranged in the nickel-plated copper wire. The framework is laid on a workpiece, and the induction coil is aligned with a working part and starts to act after being electrified, so that the working part is induced to automatically heat. The bendable framework is adopted, so that the surface of a weld joint is better attached; by adopting the double-layer wound coil, the inductance range of the single coil can be effectively expanded under the condition that the wire diameter is not increased, so that the maximum output power of the single coil is improved; nickel-plated copper wires are adopted, the coil temperature is effectively reduced by about 100 DEG C, and the effect is obvious; the temperature difference between the inner side and the outer side of the welding seam in the stable heat preservation process meets the process requirement.

The invention relates to the technical field of superconducting magnet design optimization, and discloses a superconducting magnet coil design method, a superconducting magnet coil design device, superconducting magnet coil design equipment, a medium and a product. The plurality of optimization targets comprise at least two items of coil center magnetic field intensity, magnetic field uniformity of a coil target area, coil inductance and coil material consumption; acquiring an initial setting range of a plurality of coil design parameters; constructing a plurality of fitness functions according to the plurality of optimization targets; and in the initial setting range of the multiple coil design parameters, the multiple coil design parameters are optimized based on the multiple fitness functions, a target coil design parameter combination is obtained, and the target coil design parameter combination is a configuration scheme of the multiple coil design parameters meeting the constraint conditions of the multiple optimization targets. According to the method, comprehensive automatic optimization of multiple performance indexes such as magnetic field intensity, uniformity, inductance and material consumption in superconducting magnet coil design is realized.

The utility model relates to electronic components technical field especially relates to a choke coil inductor, the utility model discloses the protrusion that extends along the radial is arranged at two corners of base body, the threading hole along the axial is seted up on the protrusion, and the both ends of coil extend to two protrusions along the radial respectively, and the one end of two electronic wires respectively passes threading hole and is electrically connected with the both ends of coil, and such design can increase the distance between the two lead ends of coil, and the insulation performance and reliability of inductor are improved significantly, and the corona discharge problem under high pressure environment is avoided.

Systems and devices for wireless power transmission is provided. A system includes a ground assembly and a vehicle assembly. The ground assembly includes a primary coil and a magnetic permeable core. The vehicle assembly includes a secondary coil capable of being inductively coupled to the primary coil and one or more magnetic permeable wings disposed on top of the secondary coil. Each of the one or more magnetic permeable wings overlap the secondary coil such that each of the one or more magnetic permeable wings extend within and beyond a periphery of the secondary coil for generating additional coupling between the primary coil and the secondary coil.

The present invention relates to an electrical machine (1) with a stator (2) and a rotor shaft (4) mounted on the stator so as to be rotatably adjustable about a rotational axis (3), with a primary coil (5) arranged on the stator (2) and a secondary coil (6) arranged on the rotor shaft (4), which is inductively coupled to the primary coil (5) during operation of the electrical machine (1) so that electrical energy is transferred from the primary coil (5) to the secondary coil (6). It is essential for the invention that the electronic rectifier components (9) of a rectifier device (7) are arranged within a receptacle (15) of a rectifier housing (8) of the rectifier device (7) and are indirectly cooled by cooling channels (17) of the rectifier housing (8).

The utility model relates to an adjustable impedance matcher applied to a PVD (Physical Vapor Deposition) pre-cleaning process. The adjustable impedance matcher comprises a cavity shell, a coil inductor, a capacitor assembly and a radio frequency source connecting port, a coil inductor is installed on the inner side wall of the cavity shell, and a capacitor assembly is installed at the bottom in the cavity shell. The capacitor assembly comprises two capacitor installation bases distributed in the front-back direction, the chip capacitor C is installed on a chip capacitor installation base, and the front end and the rear end of the chip capacitor installation base are installed on the two chip capacitor installation bases respectively. According to the utility model, by adopting the matching network with a fixed structure, the design is more concise, the cost is lower, the adaptability is stronger, different capacitors are adopted for matching according to the frequency change, the operation is simple, the controllability is strong, and the troubleshooting is convenient.

The invention relates to the technical field of power protection, and discloses a dynamic compensation switching method based on a grounding transformer arc suppression coil. The method comprises the following steps: collecting zero-sequence voltage, zero-sequence current and line impedance of a photovoltaic system in real time through a multi-branch collector to obtain a power grid operation state parameter set; according to the phase relationship between the zero-sequence current and the zero-sequence voltage, identifying a photovoltaic internal fault through a fault direction discrimination algorithm; inputting the fault confirmation signal into an arc suppression coil inductance adjusting system, and dynamically calculating a compensation inductance parameter according to the capacitive current of the fault point; the inductance of the arc suppression coil is adjusted through the combination of the graded reactors controlled by the thyristors, so that the inductive current and the capacitive current are counteracted with each other, and the grounding arc is extinguished. The technical problems that a traditional arc suppression coil cannot distinguish photovoltaic internal and external faults, compensation parameters are fixed and the response speed is low are solved, and the accuracy of ground fault processing and the dynamic response capability of compensation switching are improved.

An inductive wireless power transfer and communication system includes an electrostatic shield for one of the coils. The electrostatic shield is inductively coupled with the coil and is configured as an open circuit. A signal processing element or elements, especially a modulator or a demodulator, are connected across the electrical discontinuity in the electrostatic shield. Because the electrostatic shield is inductively coupled to the coil, the modulator or demodulator can operate on the signal on the coil. An electronically controlled variable inductor is connected across the electrical discontinuity in the electrostatic shield. Because the electrostatic shield is inductively coupled to the coil, the variable inductor can tune the impedance of the system.

Embodiments herein relate to a clock distribution network. In one aspect, the network includes a resonant transmission line-based architecture which includes a single inductive-capacitance (LC) termination along the distribution and an additional capacitive termination at the end of the distribution to independently tune the primary and secondary resonance frequencies of the network and perform 3rd-harmonic filtering. The LC termination can include a coil inductor or a short-circuited termination line with parallel conductors to provide an inductance.

The utility model relates to electromagnetic heating technical field discloses series connection type helical coil array's electromagnetic heating coil disc, including support board, the top fixed connection of support board has a plurality of coil framework combinations, the inside installation of coil framework combination has heating assembly, the bottom mounting of support board has supplementary assembly, heating assembly includes helical coil, helical coil installs in the inside of coil framework combination, and it is series connection between a plurality of helical coils, supplementary assembly includes magnetic stripe combination, and the bottom mounting of magnetic stripe combination in support board, in the utility model, when heating, the utensil is placed on the isolation mica piece, and the helical coil that starts series connection and close arrangement can rapidly produce uniform magnetic field, realizes wide -range uniform heating, reduces local overheating or deficiency. The magnetic stripe combination can increase coil inductance, gather magnetic force line, reduce leakage magnetism, improve efficiency and reduce interference, and can also supplement energy and increase output.

The invention provides a reservoir stability monitoring device and method in the natural gas hydrate exploitation process. The monitoring device comprises a monitoring well, an electromagnetic induction coil and a measuring circuit. The electromagnetic induction coil is wound on a shaft of the monitoring well, and the measuring circuit is electrically connected with the two ends of the electromagnetic induction coil; according to the electromagnetic induction principle, measured non-electric quantity such as displacement, strain, pressure, flow, vibration and the like is converted into the change of the inductance value of the electromagnetic induction coil, so that sensing monitoring is carried out; according to the measurement method, the monitoring device is longitudinally fixed on the submarine landslide slope. According to the monitoring device and the monitoring method, measured non-electric quantity such as displacement, strain, pressure, flow, vibration and the like is converted into change of coil inductance for monitoring by utilizing an electromagnetic induction principle. The coil with tensile strength is adopted, so that the coil can be deformed in a large range, and the inductance type monitoring device has the characteristic of large strain and is suitable for submarine landslide deformation monitoring.

The present invention addresses the problem of providing a position sensor that can accurately measure the distance to an object to be measured. [Solution] The position sensor includes a detection coil disposed opposite the object to be measured, a temperature sensor, an oscillator, a processing unit, and a storage device. The oscillator outputs an oscillation signal having a frequency corresponding to the inductance of the detection coil. The temperature sensor outputs a measurement signal corresponding to the temperature of the detection coil. The storage device stores correlation data indicating the relationship between the distance between the object to be measured and the detection coil, the frequency, and the temperature of the detection coil. The processing unit receives the oscillation signal and the measurement signal, and outputs the distance based on the correlation data.

The application discloses a paper folding structure inductive self-decoupling micro six-dimensional force sensor, and belongs to the technical field of force sensors. The paper folding structure inductive self-decoupling micro six-dimensional force sensor comprises a base, a folded flexible circuit board, a metal shell, a communication cable, a coil inductance measurement circuit and an elastomer. The folded flexible circuit board comprises a coil array and an inductance measurement circuit. The coil array is folded on the upper surface and four side surfaces of the base. The inductance measurement circuit is folded on the bottom of the base and leads out the communication cable. The metal shell is arranged above the base and surrounds the surfaces of the folded flexible circuit board except the bottom surface. The elastomer is arranged between the metal shell and the base. The elastomer converts the six-dimensional force borne by the metal shell into six-dimensional displacement. The sensor is sensitive to the normal displacement and insensitive to the tangential displacement and rotation by utilizing the eddy current effect, and realizes the self-decoupling measurement of the six-dimensional displacement of the metal shell by combining the three-dimensional coil layout, so that the self-decoupling six-dimensional force measurement is realized. The sensor can be integrated into a dexterous finger tip to provide endogenous tactile perception.

The application discloses a kind of for GIS internal sensor wireless energy transmission system and power promotion method, belong to wireless electric energy transmission technical field.System is by original side transmission module, GIS aluminum alloy shell equivalent circuit and secondary side energy pickup module composition, by establishing the equivalent inductance-resistance model of metal shell and its coupling relationship with original secondary side receiving coil, innovative it is proposed based on frequency scanning reflection impedance parameter calculation method.Specifically include: by small frequency change measurement coil inductance change, combine reflection reactance formula and carry out curve fitting to solve equivalent parameter;Using scale factor to establish KVL equation to deduce eddy current loss and induced voltage;Build secondary side equivalent impedance model and optimize compensation capacitor parameter, so that equivalent impedance real part matches load resistance and imaginary part is zero, realize maximum power transmission.This method solves the problem of low transmission power caused by metal shell interference and the lack of modeling theory, and the power output is greatly improved compared with traditional method.

To provide an internal support structure and a cooling structure for a coil inductor used in a LINAC.SOLUTION: A coil inductor includes one or more tubes, each including an internal support structure to stiffen the tube. Supporting the tube reduces vibration and allows the coil to resonate at its natural frequency. In some embodiments, the internal support structure includes one or more internal walls. The internal walls can be used to form multiple fluid channels that allow coolant to flow through the tubes. An end cap can be disposed at a second end of the tube to allow fluid communication between the supply and return fluid channels. A first end of the one or more tubes can be connected to a manifold that includes supply and return ports for coolant to flow through.SELECTED DRAWING: Figure 2A

The invention discloses an integrated LC radio frequency power assembly and a radio frequency power supply with the same, and belongs to the technical field of radio frequency power assemblies and radio frequency power supplies. The integrated LC radio frequency power assembly comprises a multi-layer structure and a magnetizer; the multi-layer structure comprises at least two conductor layers which are arranged in a stacked mode, a dielectric layer is arranged between every two adjacent conductor layers, and a capacitor C is formed by the adjacent conductor layers and the dielectric layer between the adjacent conductor layers; the conductor layer and the magnetizer form an inductor L; and the magnetizer is sleeved outside the multi-layer structure and is used for gathering a magnetic field around the conductor layer and enhancing the inductance value of the conductor layer. Capacitance is formed among multiple layers of conductors, the use number of high-voltage, high-frequency and high-Q-value chip capacitors is reduced, a magnetizer is adopted to increase the inductance value of the conductor with the specific length to replace a coil inductor, the inductor and the capacitor are integrated, the circuit size and the circuit board area are reduced, and cost is reduced; the invention also has the advantages of interference resistance, high efficiency, high power, reduced heat dissipation requirement, no winding process and the like.

The invention relates to the technical field, and discloses a multi-coil inductor and a production technology thereof.The method comprises the steps that a magnetic conductivity material is selected to prepare an EE type magnetic core, and an air gap is formed in the center position of a magnetic core center column; the number of turns, the wire diameter and the winding mode of each coil winding are designed, and an insulating layer is arranged between every two adjacent coil windings; dividing the total magnetic flux into a plurality of equivalent magnetic fluxes by adopting a magnetic field division method, and respectively calculating the magnetic fluxes of all parts and the influence of the magnetic fluxes on the magnetic resistance; the wire diameter and the paint thickness of the coil winding are optimized through finite element analysis, and the self-tuning frequency of the inductor is improved; coil winding is carried out by adopting automatic winding equipment, so that uniform and stable winding is realized; and selecting a packaging material, and packaging the inductor by adopting a vacuum packaging technology. The multi-coil inductor has the advantages of being excellent in high-frequency performance, low in parasitic parameter, uniform in magnetic field distribution and high in packaging reliability, and is suitable for various high-frequency application scenes.

The invention discloses an energy storage converter-oriented bridge resonance compensation circuit parameter optimization method and system. The method comprises the steps of constructing a multi-target nonlinear programming model; according to the model, primary / secondary resonance coil inductance values and compensation inductance values are taken as optimization variables, the maximum system output power and the minimum electrical stress sum of key elements are taken as a target function, and the system output power, the system transmission efficiency, the element electrical stress and the number of turns of resonance coils are taken as constraint conditions; solving the multi-objective nonlinear programming model by adopting a multi-objective optimization algorithm to obtain a Pareto optimal solution set containing a plurality of non-dominated solutions; and selecting a group of optimization variable values from the Pareto optimal solution set as final parameters of the bridge type resonance compensation circuit. The method has the advantages of effectively coordinating the conflict between the maximization of the output power of the system and the minimization of the electrical stress of the key element, improving the safety and the transmission efficiency of the system, and meeting multiple engineering constraints at the same time.