19 results about "Coil geometry" patented technology

The invention discloses a wireless power transmission coil optimization method and a related system, which can realize automation of coil structure parameters and multi-target global optimization by acquiring a coil geometric parameter space, constructing a comprehensive optimization function and performing iterative search in the coil geometric parameter space. The problems that in traditional design, the number of simulation iterations is large, design efficiency is low, local optimum is prone to occurring, and multiple performance indexes are difficult to balance are effectively solved, coil design efficiency and precision are remarkably improved, and dependence on artificial experience is reduced. Therefore, the number of manual intervention and simulation is remarkably reduced, the coil design efficiency is improved, and the prototype development period of the WPT system is shortened. Besides, iterative search is carried out in the parameter space, so that the whole design space can be effectively explored, a locally optimal solution trap can be jumped out, and a globally optimal or approximately globally optimal coil structure parameter combination can be obtained more possibly.

The application discloses a coil layout optimization and pose estimation simulation model, relates to the technical fields of electromagnetic tracking, simulation modeling and electromagnetic layout optimization, and aims to realize optimal design of a transmitting coil spatial layout and high-precision pose calculation through high-fidelity numerical simulation data driving. Under the driving of specific excitation signals, a simulation engine utilizes ANSYS finite element analysis to pre-construct a global magnetic field fingerprint characteristic map of the transmitting coil, so as to replace a traditional magnetic dipole mathematical approximation model. In order to improve the scientificity of the coil layout, virtual magnetic field data generated by ANSYS is mapped into sensor sensing voltage prediction values, and residual errors are constructed with pose estimation values output by a calculation module; subsequently, the pose errors are used as feedback evaluation indexes to iteratively correct coil geometric arrangement parameters in the ANSYS model, and finally, a global optimal layout is obtained.

A metal magnetic flexible composite inductor conductor and a preparation method thereof; the preparation method of the metal magnetic flexible composite inductor conductor comprises the following steps: S1: taking metal and magnetic material; the magnetic induction intensity of the magnetic material is greater than or equal to 1.6 T; S2: continuously attaching the metal to the magnetic material to obtain a conductive and magnetically conductive composite conductor; S3: cutting the conductive and magnetically conductive composite conductor by using a femtosecond laser processing technology to obtain a spiral flexible composite inductor conductor. The flexible composite inductor conductor prepared by the scheme can obtain a larger self-inductance value under the same size, can effectively suppress leakage magnetic flux, reduce leakage magnetic coupling to the outside world and electromagnetic interference, and can realize a more compact spiral inductor layout by reducing the number of turns or reducing the coil geometric size, thereby solving the problem that high inductance density and low power consumption cannot be simultaneously achieved in the traditional inductor conductor.

The invention discloses a radio frequency chip integrated packaging structure and technology, and the structure comprises the following steps: carrying out the primary packaging of a first line which is parallel and is uniformly arranged at intervals, and forming a first packaging layer; holes are drilled in the surface of the first encapsulation layer to expose all end points of the first lines, metal is electroplated on the exposed end points to fill the drilled holes, wiring connecting columns are electroplated on a set of diagonal end points arranged on the two edge first lines, and first stand columns are electroplated on the other exposed end points; electroplating a wiring layer on one surface of the encapsulation layer, and electrically rearranging the wiring connecting columns; the electrical end of the bare chip is electrically connected and mounted with the corresponding wiring layer, and the bare chip and the wiring layer are encapsulated again to form an encapsulation layer II; drilling holes in the surface of the encapsulation layer II to expose the end points of the upright posts I, and electroplating upright posts II on the exposed end points to fill the drilled holes; the bare chip is located in the geometric center of the three-dimensional coil, the induction current and the signal intensity are optimal, the three-dimensional coil has the more omnidirectional induction characteristic, and stable coupling can be kept.

The manufacturing method comprises the following steps: pre-treating an annealed red copper bar to be provided with a linear section and a bent section, designing a core mold according to the size of a reinforcing rib of the anti-shaking plate, winding the core mold in cooperation with an insulating film to form a wire, and applying epoxy glue; and after clamping and glue filling, embedding into an epoxy plate processed with a matching groove and a reinforcing rib accommodating space, and heating, curing and forming. According to the method, the geometrical shape of the coil is highly matched with the height of the reinforcing rib of the anti-shaking plate, the good insulation performance and structural strength are achieved, and the accuracy and consistency of electromagnetic shape correction of the anti-shaking plate are improved.

The application discloses a kind of brushless DC motor hexagonal hollow cup winding optimization design method, which obtains the constraint condition of adjacent coil wire arrangement without structural interference under different wire diameter and hexagonal coil size parameter by establishing coil geometric shape model, deduces the coil design parameter for maximizing the winding ampere-turn magnetic flux, and is converted into control parameter in the process of coil winding process.The hollow cup winding optimized and designed by the application, the diagonal line segment is in a close arrangement state, so that the wire spacing is physically constrained, effectively limits the spatial position of the wire, avoids random displacement of the wire, can optimize the motor torque output performance and effectively improve the symmetry of three-phase winding electrical parameters, auxiliary hexagonal hollow cup winding design makes it scientific and standardized.

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 invention relates to a main coil assembly for a ground module (GPM) or a vehicle module (CPM) of an inductive charging system of a vehicle, comprising a main coil (101). The invention is characterized in that the main coil (101) is designed to have at least one current conductor (102), which is arranged in a space between a first boundary surface (103) and a second boundary surface (104) of the main coil assembly, through which a fluid can flow, such that the fluid can flow around the current conductor (102), and guiding / holding the at least one current conductor (102) in a predetermined coil geometry and in a predetermined coil position in the space by means of separate and spaced-apart guiding and / or holding elements (105).

The application discloses a wireless power transmission coupling coil design method and system and equipment, comprising: obtaining system working parameters and secondary side coil structure size constraints; establishing a total loss function containing loss items that increase and decrease with the increase of the secondary side inductance; determining the target inductance value or interval of the secondary side based on the loss function to reduce the total loss; mapping the target inductance value or interval to the geometric structure parameters of the secondary side coil under the structure size constraints; verifying the system output performance and selecting the secondary side coil scheme that meets the preset requirements. The application can accurately locate the low-loss parameters under the conditions of meeting the space constraints and output power requirements, effectively reduce the original secondary side coil loss, and improve the system transmission efficiency.

This invention relates to the field of sensor and signal processing technology, specifically to a method for equivalent modeling of the structural parameters of the induced voltage of a three-coil abrasive sensor. The method includes: establishing an equivalent geometric model of the coils and a physical model of the magnetic field for the three-coil abrasive sensor; deriving a structural kernel function; decoupling the structural kernel function to obtain a normalized dimensionless structural kernel function that depends only on the geometric characteristics of the coils; deriving an approximate analytical expression of the Gaussian first derivative of the normalized dimensionless structural kernel function; defining an objective function based on the approximate analytical expression of the Gaussian first derivative; iteratively solving the objective function using a nonlinear least squares algorithm to complete the construction of an approximate equivalent model of the induced field distribution of the three-coil abrasive sensor; this invention realizes a clear physical representation of the mapping relationship between the sensor output abrasive induced voltage and structural parameters, reducing computational complexity.

The invention provides an electromagnetic pulse welding effect perception regulation and control method based on current waveform characteristics. The electromagnetic pulse welding effect perception regulation and control method comprises the following steps that S1, coil current is measured through an oscilloscope and a Rogowski coil; calculating mutual inductance M of the current waveform; according to the distance h between the workpiece and the coil, the frequency omega and the three-dimensional tensor M (h, omega, J) of the nonlinearity J, geometric distance calculation is carried out; s2, inverting a three-dimensional deformation field h (r, theta, z, t) of the workpiece by using a broadband current spectrum; s3, performing pulse adjustment constraint calculation through calculation of the elastic coefficient, the transverse stress and the longitudinal stress; and S4, predicting and controlling the MPC to adjust the capacitor charging voltage U0, the discharging time sequence delta t and the geometric pose of the coil in real time through the constraint model.

This application proposes a method for measuring pipeline conductivity and inner diameter based on swept-frequency eddy currents. The method includes: constructing an eddy current detection device, designing an absolute eddy current detection coil, placing the coil inside a metal pipe and coaxially arranged with the pipe, passing an alternating current to excite an alternating magnetic field, and inducing eddy currents on and near the pipe surface; establishing an analytical theoretical model for eddy currents in metal pipes, setting the coil's geometric parameters, and calculating an analytical expression for how the coil's impedance changes with the excitation frequency; calculating the peak frequency and corresponding phase value of the coil's impedance phase in a swept-frequency mode, varying the pipe's conductivity and inner diameter, extracting the corresponding peak frequency and phase value, and constructing an inner diameter relationship model based on quadratic curve fitting and a conductivity relationship model based on power function fitting; and combining the coil impedance swept-frequency phase measurement results to invert the inner diameter and conductivity of the metal pipe. This method can simultaneously measure the pipe's conductivity and inner diameter, making it suitable for nondestructive testing and performance evaluation of metal pipes.

The invention discloses a construction method of a rapid discrete analytical model for pulsed eddy current detection of a metal pipeline, and belongs to the field of electromagnetic nondestructive detection.The construction method comprises the steps that a physical model for pulsed eddy current detection of the metal pipeline is constructed, and a complex frequency domain magnetic vector potential expression in the physical model is determined; for the finite-length metal pipeline, the complex frequency domain magnetic vector potential in the axial interval of the finite-length metal pipeline is expanded into an odd function form through Fourier series, and a magnetic vector potential expression in a discrete form is obtained; a complex frequency domain induced voltage expression of the receiving coil is deduced according to the incidence relation between the electric field intensity and the induced voltage by combining geometric parameters of the receiving coil; the method comprises the following steps: selecting a Fixed-Talbot algorithm, determining free parameters of the algorithm, performing inverse Laplace transformation on a variable containing complex frequency in a complex frequency domain induced voltage expression to obtain a time domain expression of the variable, further obtaining time domain induced voltage of a receiving coil, and completing construction of a metal pipeline pulsed eddy current detection analytical model.

This invention discloses a wireless power transfer coil optimization method and related system. By acquiring the coil's geometric parameter space, constructing a comprehensive optimization function, and performing iterative searches within the coil's geometric parameter space, it can achieve automated and multi-objective global optimization of coil structural parameters. This effectively solves the problems of numerous simulation iterations, low design efficiency, susceptibility to local optima, and difficulty in balancing multiple performance indicators in traditional design. It significantly improves coil design efficiency and accuracy, and reduces reliance on human experience. This significantly reduces manual intervention and simulation times, improves coil design efficiency, and shortens the prototype development cycle of the WPT system. Furthermore, by performing iterative searches within the parameter space, the entire design space can be effectively explored, escaping local optimum traps and increasing the likelihood of obtaining globally optimal or near-globally optimal combinations of coil structural parameters.

The invention provides a spiral groove framework for winding a high-temperature superconducting D-type coil. Electromagnetic performance optimization and efficient heat management are achieved through double-face differential groove design. A spiral groove is formed in the front face of the framework to serve as a coil winding channel, a linear groove is formed in the back face of the framework to construct a liquid helium heat dissipation channel, and the core problems that in the prior art, the coil is insufficient in geometrical shape stability, low in heat dissipation efficiency, limited in process precision and the like are solved. The spiral groove on the front surface of the framework is planned by adopting a precise track, so that each layer of superconducting tape of the cake-type coil is tightly attached along a preset coordinate track, and the gap of the groove is filled with an insulating material, thereby effectively reducing the interlayer discharge risk. The linear groove on the back surface of the framework is optimized through fluid dynamics, and the wide-deep rectangular section design is adopted, so that the flow velocity of liquid helium is increased. According to the invention, spiral track winding and a linear heat dissipation channel are creatively integrated into a single skeleton component, and collaborative improvement of magnetic field uniformity and heat dissipation efficiency is realized in a limited space.

The invention discloses an optimization design method for a hexagonal hollow cup winding of a brushless direct current motor, and the method comprises the steps: obtaining a constraint condition of no structural interference of adjacent coil wire arrangement under different wire diameters and hexagonal coil size parameters through building a coil geometrical shape model, deducing coil design parameters enabling the winding turn chain magnetic flux to be maximized, and carrying out the optimization design of the hexagonal hollow cup winding of the brushless direct current motor. And the control parameters are converted into control parameters in the coil winding process. According to the hollow cup winding optimally designed by the invention, the oblique line sections are in a tight arrangement state, so that the distance between the wires is physically constrained, the spatial position of the wires is effectively limited, the wires are prevented from randomly shifting, the torque output performance of the motor can be optimized, and the electrical parameter symmetry of the three-phase winding is effectively improved; and the design of the hexagonal hollow cup winding is assisted to be scientific and standardized.

The application discloses a kind of wireless power transmission system coil parameter prediction method and system, it is related to coil electrical parameter calculation technical field, based on the two-dimensional parameterized geometric model of established circular coil carries out finite element simulation, obtains training data, uses training data to train improved Gaussian process regression model, obtains coil parameter prediction model, based on coil parameter prediction model, constructs integrated learning correction model, based on coil parameter prediction model and integrated learning correction model, the coil geometry parameter to be predicted is predicted, obtains including alternating current resistance, self-induction and mutual inductance Coil electrical parameter, to efficiently predict the coil parameter under different working conditions, reduce the time-consuming of traditional finite element simulation, more effectively ensure the accuracy of the coil alternating current resistance, self-induction and mutual inductance predicted, to accurately and efficiently predict the coil parameter of wireless power transmission system.

The flexible loudspeaker sounding coil extension assembly manipulator comprises a voice coil extension base, a clamping and releasing driving assembly and a voice coil extension jig are arranged at one end of the voice coil extension base, and a coil clamping and releasing assembly is arranged on one side of the voice coil extension jig through a support. The coil clamping and releasing assembly comprises an expansion pressing piece arranged on one side of the voice coil expansion jig, and a U-shaped opening is formed in the end, facing the voice coil expansion jig, of the expansion pressing piece and used for clamping and releasing a coil. The servo motor and the speed reducer are used for driving the voice coil expansion rotating block with the specific arc-shaped guide groove, and the two voice coil expansion jigs are accurately controlled to synchronously move in the same direction or back to back; the wound basic coil can be stably and uniformly expanded to a preset special shape, the expansion size is precisely controlled by a program, and the repeated positioning precision is high; the problems that in the prior art, winding displacement of special-shaped coils is not arrayed, and the size is prone to expansion are solved, and the consistency of the geometrical shape and the size of the coils is guaranteed.