14 results about "Current element" patented technology

The invention relates to the technical field of circuit board layout design, and discloses a high-computing-power printed circuit board method and system, and the method comprises the following steps: 101, collecting the historical data of an element placement scheme in the PCB layout design of a circuit board; step 102, checking update conditions satisfied by the historical feature vectors, and then selecting a corresponding update mode to update the historical feature vectors; step 103, selecting the historical feature vector with the maximum balance degree value obtained after updating as a reference feature vector, and then selecting a current element coordinate matrix generated when the reference feature vector is updated for the last time to obtain the coordinate position of each element on the board surface; step 104, generating dimension parameters of the circuit board according to the coordinate positions of the elements on the board surface of the circuit board, and completing the element arrangement design of the circuit board; the size parameters of the circuit board are generated according to the coordinate positions of the elements on the board surface of the circuit board, and the accuracy of the size parameters can be ensured.

The invention discloses an electric field evaluation method and system based on potential-power transmission line coupling, and relates to the technical field of power system protection, and the method comprises the steps: building a current fluctuation model based on a lightning channel engineering model; hybrid emission of a current element i and a charge element q is adopted based on a current fluctuation model; obtaining a voltage U'under the condition of lossy earth through the induced voltage on each section of line; obtaining a total horizontal voltage based on the voltage under the condition of lossy earth and the voltage under the condition of lossless earth; the electric field is evaluated based on the total horizontal voltage. On the basis of a dipole current model, charge distribution introduction, current generation of magnetic potential and charge generation of potential are combined, the relative positions of charges and current elements can be improved when an electric field channel is discretely simulated by a computer, a near-field electric field can be simulated more accurately, and the simulation precision is improved. Meanwhile, the divergence problem caused by calculation truncation errors can be counteracted when the structure is coupled with a coil type structure, and the accuracy and stability of calculation are improved.

The invention provides an element layout spacing checking method and system, electronic equipment and a computer storage medium. The method comprises the following steps: acquiring a rectangular tree of elements; expanding the first frame to obtain a second frame; traversing the rectangular tree by using the second frame to obtain a target element of the current element; obtaining a target boundary; and calculating the distance between the current element and the target boundary of the target element, and further judging that the layout spacing of the current element does not meet the requirement. Whether the layout spacing of the current element meets the requirement or not is judged by extracting the target element having the overlapping relation with the current element and calculating the distance between the target element and the current element, it is not needed to calculate the spacing of all the elements in a traversal mode, and it is also not needed to calculate the distance of all boundaries of the elements. Therefore, on the basis of ensuring the accuracy of the layout spacing check, the calculation amount is greatly reduced, the time for checking the layout spacing of the circuit board elements is shortened, and the problem that the time for checking the layout spacing of the circuit board elements is long in the prior art is solved.

The invention provides a method for calculating the shielding performance of a threading metal pipeline. The method comprises the following steps: determining a calculation object and physical parameters; determining an electric field and a magnetic field in the shielding cavity according to coordinates and current elements of the radiation source in the physical parameters; obtaining radiation characteristics of a pipeline hole at the joint of the shielding cavity and the metal pipe, and determining an electric field and a magnetic field in the metal pipe according to the radiation characteristics; the method comprises the following steps: discretizing a transmission line into an equivalent circuit model formed by cascading a plurality of lumped parameter circuit units so as to calculate a transmission line coupling distributed current; determining a distributed voltage source in the equivalent circuit model according to the electric field in the shielding cavity and the electric field in the metal tube; and determining a leakage electric field and shielding effectiveness according to the distribution current coupled by the transmission line. According to the method, the vector Green function, the field line coupling theory and the electromagnetic compatibility theory are integrated, and the shielding performance of the shielding cavity threading metal pipeline is calculated.

The invention discloses a welding machine voltage feedback automatic calibration method, system, medium and equipment, and the method comprises the steps: switching off an external voltage feedback loop of a welding machine in response to a starting condition meeting voltage feedback zero point deviation calibration, and short-circuiting a primary input end of a current CT element at the same time; a secondary output level signal of the current CT element is used as a zero-point deviation value, the zero-point deviation value is input to an ADC sampling end of the main control MCU module through the intermediate circuit module, ADC sampling and mean value processing are carried out, and a final voltage feedback zero-point deviation value is obtained; comparing with a set threshold value; and the control switch is reset, the calibration state is ended, the external voltage feedback loop of the welding machine is recovered, the primary input end of the current CT element is disconnected, the welding external voltage feedback signal is sampled, the ADC sampling value and the obtained deviation value are subjected to compensation operation, and a final voltage feedback value is formed. The problem of zero drift caused by temperature drift, humidity drift and device discreteness of the sensor and the conditioning circuit is effectively solved.

A high-current element for high-current printed circuit boards is formed from at least two metal sheets which are connected to form a sheet-metal stack and which have a plurality of pins at least at an end region thereof, and wherein the sheet-metal stack has a terminal region, a pin region, and a connection region, and wherein the metal sheets are connected to one another in the connection region, and the pins are arranged in the pin region and formed for contacting with the high-current printed circuit board, and the terminal region is set up to be used as a terminal region for connecting the high-current element to external power terminals.

The application discloses a Manchester decoding method and device and a battery management system applying the same. The Manchester decoding method comprises the following steps: obtaining a first signal and a second signal according to Manchester coding; the width of a high level pulse in the first signal is smaller than that of a high level pulse in the Manchester coding, and the width of a high level pulse in the second signal is smaller than that of a low level pulse in the Manchester coding; the transition moment of a to-be-decoded element in the Manchester coding is located between two adjacent high level pulses of the first signal and the second signal; the number of 1s and / or 0s in each first reference width before and after the transition moment is counted at a fixed frequency; and the current element is decoded according to the number of 1s and / or 0s in each first reference width before and after the transition moment. The Manchester decoding method can well cope with the situation that the received signal is distorted in pulse width and has burr distortion.

An interpolative divider divides an input clock signal according to a divide ratio and supplies an output clock signal. An integer divider receives the input clock signal and supplies an integer divider output signal. A phase interpolator is coupled to the integer divider and delays the integer divider output signal according to a quantization error. The phase interpolator includes first and second current sources. The first current source turns on k unit current elements during a first part of a charging cycle to charge a first capacitor to a first voltage, 0≤k≤M, k and M are integers, and k is determined by the digital quantization error. The second current source turns on k+M unit elements to charge a second capacitor during a second part of the charging cycle. The output clock signal transitions when the the first voltage equals the second voltage.

The invention discloses a dynamic adjustable magnetic field focusing method and system based on a phase-controlled current element array, and relates to the technical field of electromagnetic field control, and the method comprises the steps: carrying out the phase calibration of each current element in the current element array based on a target focusing position, so as to obtain a phase compensation value of each current element, the current element array comprises a plurality of current elements, determining an excitation signal of each current element based on the phase compensation value of each current element, and dynamically adjusting a phase item of each target point based on the phase compensation value of each current element and the excitation signal of each current element, so that the adjusted magnetic field is focused on a target focusing position, the target point is a target point in a magnetic field generated by the current element array. A dynamic focusing algorithm is constructed according to an electromagnetic wave interference theory and a magnetic vector superposition principle, an array unit is driven to generate a coherent superposition magnetic field by adjusting the phase and amplitude of an excitation signal in real time, and high-magnetic-field-energy dynamic focusing is realized at a target position.

The embodiments of the present disclosure disclose an internal voltage detection circuit, a detection method and an integrated circuit. The circuit comprises a first current source, a first branch and a second branch. The first branch and the second branch are used to shunt the current signal output by the first current source. The first branch comprises a first voltage-controlled current element and a first load connected in series. The second branch comprises a current signal detection element and a second load connected in series. The control signal input end of the first voltage-controlled current element inputs a voltage signal to be detected. The current signal detection element is used to output a preset signal representing a second current flowing through the second branch in real time, so that the change of the voltage signal to be detected can be determined based on the preset signal, and a more accurate detection result of the voltage signal to be detected can be obtained.

The application discloses a kind of electromechanical transient simulation model sharing method and system, comprising the following steps: initialization modeling and time domain simulation modeling are carried out to element, and the ID number of current element is obtained, is uploaded to server custom component library by network, according to the ID number is stored, realize the pretreatment function of the element;After the pretreatment, simulation calculation includes obtaining power system data and carrying out power flow program calculation;Analysis power system data, and determine inherent model and custom model;Custom model is extracted by searching the custom component library, and it is judged whether search is successful or not.The application realizes the model custom function for electromechanical transient simulation of power system and cross-user shared use, can allow end user to electromechanical transient simulation main program to be unable to provide the element of model to carry out custom modeling, allow end user to design or receive new element when verifying the dynamic characteristics of equipment access large power grid.

The invention provides a method and a device for calculating a power frequency magnetic field in a transformer substation, and belongs to the field of electromagnetic environment calculation of a power system. The method comprises the following steps: establishing a power frequency magnetic field calculation model considering geomagnetic permeability and any erection mode of a power transmission line; calculating the current element magnetic induction intensity generated by the current element at any point in the space based on the model; through coordinate translation and rotation transformation, a coordinate transformation relation corresponding to the power transmission line erected at any angle is obtained, and the power frequency magnetic field intensity generated by the power transmission line erected at any angle at any point in the space is calculated; for a three-phase AC power transmission line, power frequency magnetic field intensity generated by each phase line at any point in space is superposed, and the total power frequency magnetic field intensity of the point is obtained. According to the method, the model containing the geomagnetic permeability and any line erection mode is established, and the power frequency magnetic field adaptive to the line at any angle is calculated based on the model, so that the calculation accuracy of the power frequency magnetic field distribution of the transformer substation is remarkably improved.

The application discloses a dynamic adjustable magnetic field focusing method and system based on a phased current element array, and relates to the technical field of electromagnetic field control. The method comprises the following steps: based on a target focusing position, performing phase calibration on each current element in the current element array to obtain a phase compensation value of each current element, wherein the current element array comprises a plurality of current elements; based on the phase compensation value of each current element, determining an excitation signal of each current element; and based on the phase compensation value of each current element and the excitation signal of each current element, dynamically adjusting a phase term of each target point to enable the adjusted magnetic field to focus on the target focusing position, wherein the target point is a target point in the magnetic field generated by the current element array. According to the electromagnetic wave interference theory and the magnetic vector superposition principle, a dynamic focusing algorithm is constructed, the phase and amplitude of the excitation signal are adjusted in real time, the array unit is driven to generate a coherent superimposed magnetic field, and high magnetic field energy dynamic focusing is realized at the target position.

An electronic system and a chip are provided. The chip includes first to fifth pads, first and second voltage-controlled current elements, first and second bias elements. The first to third pads are coupled to a drain, a source and a gate of a first gallium nitride transistor, respectively. The third to fifth pads are coupled to a drain, a source and a gate of a second gallium nitride transistor, respectively. The first voltage-controlled current element is coupled to the first and second pads. The second voltage-controlled current element is coupled to the third and fourth pads. The first bias element is coupled to the second and third pads. The second bias element is coupled to the fourth and fifth pads. The first bias element adjusts a bias voltage of the second pad according to the first voltage-controlled current element. The second bias element adjusts a bias voltage of the fourth pad according to the second voltage-controlled current element.