19 results about "Electronic current" patented technology

The invention provides a self-adaptive short-circuit fault current-limiting control method and system for a primary and secondary fusion circuit breaker, and relates to the technical field of circuit protection and manufacturing, and the method comprises the steps: collecting a current value, a voltage value and a state quantity of a circuit breaker, and forming a first operation parameter set; performing feature extraction based on the amplitude abrupt change, the phase offset and the harmonic component, generating a first feature vector, and matching the first feature vector with a preset short-circuit fault feature template to obtain a fault recognition result, a fault type and a position identifier; a dynamic current-limiting control curve is calculated according to the identifier and the current value, a current-limiting control parameter set is generated, and a current-limiting execution mechanism is controlled to obtain current-limiting response data; after the action is completed, a second operation parameter set is collected, current limiting effect analysis is executed to generate state feedback data, and a current limiting control parameter set is updated based on the feedback data; and factory calibration can be carried out on the power electronic current limiting module serving as a current limiting execution mechanism. According to the method, the adaptive capacity and accuracy of current limiting control are improved.

This invention relates to the field of power equipment insulation condition monitoring technology, and discloses a multi-source intelligent fault judgment method for compact ring main units (ECT) and electronic current transformers (EVTs). The method includes: simultaneously acquiring transient voltage and current data of the electronic current transformer in response to a voltage step event triggered by the closing action of the grounding switch; selecting short-time window data at the moment of the step, calculating the ratio of accumulated charge to voltage drop amplitude based on the principle of charge conservation, and calibrating the parasitic capacitance parameters of the equipment; constructing a capacitive displacement component using the parasitic capacitance parameters and voltage change rate, and decoupling it from the total current to reconstruct the dielectric response current reflecting the polarization process of the insulation material; performing multi-timescale decay trend analysis on the dielectric response current to identify the mechanism switching moment, and generating diagnostic results for insulation dampness or interface degradation accordingly. This invention can effectively suppress structural capacitance interference and achieve low-cost, high-precision insulation condition assessment.

The invention discloses an electronic current transformer fault early warning model training method, and also discloses a current transformer fault early warning method for performing early warning by using a model obtained by the training method. According to the fault model training method provided by the invention, the Transform network is combined with the BiLSTM network for prediction, and the problem of precision reduction during long-time sequence data prediction is solved. Meanwhile, the NRBO algorithm is adopted to iterate the learning rate of the BiLSTM network, the number of neurons in the hidden layer and the regularization coefficient in the training process, the problems that the training time is prolonged, the fitting effect is reduced and the prediction precision is reduced due to the fact that relevant parameters are set through experience of research and development personnel are solved, and prediction is more accurate.

This invention provides a data calculation system for electronic current transformer operation, relating to the field of data processing technology. The system includes: a system for scanning the device-dependent adjacency matrix using a sliding time window; calculating the local reachability density under dynamic nearest neighbor topological distance using a local outlier factor algorithm; and extracting a multidimensional anomaly feature vector set when the total harmonic distortion rate gradient enters the statistical hypothesis test rejection region or the winding temperature rise rate exceeds the material's thermal aging critical threshold. The system then uses this multidimensional anomaly feature vector set to generate a risk quantification index set through a pre-trained fault propagation probability model. Based on the risk quantification index set, a multi-objective optimization function is established, and the NSGA-II genetic algorithm is used to perform non-dominated sorting evolution on the disposal instruction chromosomes. A Pareto front solution set is used to screen dynamically optimized instruction sequences that match the real-time load fluctuation coefficient, generating a structured disposal instruction set. This invention improves the reliability of power system operation.

The invention relates to the technical field of batteries, in particular to a composite diaphragm and a lithium ion battery. The composite diaphragm comprises a base membrane and a first coating arranged on the surface of at least one side of the base membrane, the first coating comprises temperature coefficient semiconductor particles, the temperature coefficient semiconductor particles comprise oxide ceramics, and the chemical general formula of the oxide ceramics is A < 1-x > R < x > B < 1-y > M < y > O < 3 >. Compared with the prior art, the porous coating containing the oxide positive temperature coefficient ceramic is constructed on the surface of the polyolefin base film, and the temperature response type electronic current limiting layer is introduced on the premise of not occupying the space of positive and negative electrode active materials, so that forward inhibition of thermal runaway is realized, and parasitic leakage and capacity attenuation under high-temperature storage are reduced.

The invention designs an RC-LIGBT device integrated with double self-biased MOS transistors and capable of reducing saturation current, and belongs to the technical field of semiconductors. The invention comprises a self-biased NMOS (N-channel Metal Oxide Semiconductor) at a collector side and a self-biased PMOS (P-channel Metal Oxide Semiconductor) at an emitter During forward conduction, the substrate of the self-biased NMOS inhibits electrons from directly reaching the collector through the collector N +, the Snapback effect is eliminated, injected holes enter the source of the self-biased PMOS, the voltage of the source is increased, self-biased opening of the PMOS is achieved, and the saturation current can be reduced through the caused hole extraction effect; during reverse conduction, a reverse electron current path of the device is provided after the self-biased NMOS is started, so that reverse conduction is realized; in the turn-off process, the opening of the self-bias NOMS provides an electron extraction channel, and the opening of the self-bias PMOS provides a hole extraction channel. According to the device, the Snapback effect is eliminated under the condition that an additional control electrode is not added, and compared with a traditional LIGBT, the saturation current is reduced by 21.2% when the collector voltage is 100 V, and the turn-off loss is reduced by 31.1%.

This utility model discloses a TMR electronic current transformer, including a TMR sensing head and a data acquisition device. The TMR sensing head includes a printed circuit board and a TMR chip, a temperature chip, and corresponding power supply and conditioning circuits disposed on the printed circuit board. A through-hole is provided in the center of the printed circuit board for the power system busbar under test to pass through. The TMR sensing head uses a single-chip, dual-chip, or ring array TMR chip. The TMR chip is used to sense the measured current value, and the temperature chip is used to sense the ambient temperature value. Both the TMR chip and the temperature chip are electrically connected to the data acquisition device. The TMR electronic current transformer provided by this utility model measures the power system busbar current based on the TMR chip, and has a series of advantages such as non-contact measurement, simultaneous AC and DC measurement, frequency up to the MHz level, small delay, large dynamic measurement range, low cost, high insulation level, small size, and high precision.

This invention discloses a semiconductor data testing anomaly early warning method and system, relating to the field of integrated circuit testing technology. The method includes: performing a stepped voltage test on the chip under test by calibrating a purely electronic current signal, while simultaneously monitoring changes in drain current, substrate current increments, and voltage states; calculating hot carrier injection efficiency parameters based on drain current changes and substrate current increments, and combining these parameters with the voltage states to generate photon detection commands; driving an InGaAs avalanche photodiode array to collect photon pulse counts based on the photon detection commands, and calculating a chip damage risk index based on the hot carrier injection efficiency parameters and photon pulse counts to generate a risk assessment report. This invention calculates the chip damage risk index using hot carrier injection efficiency parameters and photon pulse counts, achieving dynamic damage quantification analysis by integrating electrical parameters and optical data, thus achieving holographic perception and early risk identification of chip anomalies.

The present inventions relate to methods, systems, apparatuses, controllers, software, and composition of matter associated with connecting electrodes (e.g., a plurality of cathode structures) to a respective electrode (e.g., cathode) busbar within an electrode assembly of an energy storage device such as a (e.g., secondary) battery.

A dual three-phase permanent magnet synchronous motor control function hybrid sliding mode observer design method comprises the following steps: step 1, obtaining phase current of each phase of a motor through current sampling, and calculating to obtain motor reconstruction phase voltage according to a PWM duty ratio and bus voltage, performing VSD conversion on the sampled phase current and the reconstructed phase voltage to obtain stator current and electronic voltage of the motor; 2, taking the electron current and the stator voltage as the input of a hybrid SMO to obtain back electromotive force estimation, and taking the back electromotive force estimation before and after the LPF as the feedback input of the SMO; and step 3, extracting position information in the back electromotive force estimation after filtering by a phase-locked loop, compensating corresponding phase lag compensation, and finally taking the angle after compensation as motor rotor position estimation and applying the angle to actual control of the motor. The method is high in position estimation precision, small in buffeting, good in control performance, simple in algorithm structure and easy to implement.

The invention discloses a device and method for converting electric energy stored by ionic charges into electronic current, and the device comprises a first ion storage container, the first ion storage container is connected with a first guide pipe through a first valve, the first guide pipe is spirally wound on a first iron core, and after being led out, the first guide pipe is connected with an ion recovery container through a second valve; the ion storage container I is connected with a second conduit through a third valve, the other end of the second conduit is connected with the leading-out end of the iron core I of the first conduit, the leading-in end of the iron core I of the first conduit is connected with a third conduit through a fourth valve, and the other end of the third conduit is connected with an ion recovery container; and a metal lead is spirally wound on the iron core I to form a coil I. Ionic charges which cannot be transmitted in the metal wire are converted into electron currents, the electron currents are transmitted through the metal wire and then can be provided for a load, the device can be compatible with existing electronic equipment, and the high-density stored ionic charges have the practical application value.

A method and system for producing an adjustable resistor with a set resistance for adjusting quiescent current in a GaN transistor in a power amplifier. A quiescent current on the GaN power amplifier is measured via a test probe from a microcontroller unit on a test fixture. A resistance value is determined for output of a voltage bias value to adjust the quiescent current of the GaN transistor in the power amplifier. The resistance value is stored in an electronically adjustable resistor. The adjustable resistor is coupled to an output voltage circuit to provide voltage at the voltage vias value to a voltage bias input of the power amplifier.

The application provides an online error prediction method and device for an electronic current transformer, which comprises the following steps: obtaining environmental data of an environment where the electronic current transformer is located, and obtaining error data of the electronic current transformer by using a neural network automatic prediction mode, so as to realize online automatic prediction of the error of the electronic current transformer, improve the efficiency of error determination of the electronic current transformer, and further improve the calibration efficiency of the electronic current transformer. In addition, the target mobile penetration neural network comprises a bearing layer used for storing the output of a hidden layer in the last iteration, compared with a traditional neural network, the bearing layer structure can effectively increase the overall and local stability of the mobile penetration neural network, and further improve the error prediction accuracy of the electronic current transformer.

An online prediction method and apparatus for a metering error of an electronic current transformer. The method comprises: acquiring environmental data of an environment where an electronic current transformer is located (S101); and inputting target environmental data into a pre-trained target walk penetration neural network, and acquiring error prediction results outputted by a target error prediction model on the basis of the target environmental data, wherein the error prediction results comprise a ratio error prediction result and a phase error prediction result (S102). The method realizes online automatic error prediction for an electronic current transformer, thereby improving the efficiency of error determination for the electronic current transformer, and thus improving the calibration efficiency of the electronic current transformer. In addition, a bearing layer structure in the target walk penetration neural network can effectively improve the overall and local stability of the walk penetration neural network, thereby improving the error prediction accuracy of the electronic current transformer.

The invention discloses a protection device and method for a power integrated circuit, a motor driving module, a motor and a power supply, and the device comprises a physical thermal current-limiting protection module which is used for sensing the temperature of the power integrated circuit under the condition that the power integrated circuit works, physical thermal current limiting protection is carried out on the working current of the power integrated circuit according to the temperature of the power integrated circuit; and the electronic current-limiting protection module is used for obtaining the working current of the power integrated circuit after the physical thermal current-limiting protection module performs physical thermal current-limiting protection on the working current of the power integrated circuit, and performing electronic current-limiting protection on the power integrated circuit according to the working current of the power integrated circuit. And dual protection of physical thermal current limiting and electronic current limiting of the power integration module is realized. According to the scheme, the physical thermal current-limiting protection module is arranged on the periphery of the power integrated circuit to form double cooperative protection with the electronic current-limiting protection module in the power integrated circuit, so that the safety of the power integrated circuit is improved.

1. The name of the design product: hydrological electronic flow meter. 2. The use of the design product: for measuring flow in hydrogeological survey, environmental geological survey, hydrological monitoring, water conservancy design, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The application discloses a winding structure, a winding method and an epoxy resin vacuum casting electronic current transformer. The structure comprises a core and a primary winding. The primary winding is composed of first, second and third copper coil layers and is spirally arranged on the outer periphery of the core. The first copper coil layer is covered with a first insulating paper layer between the first copper coil layer and the second copper coil layer, and the second copper coil layer is covered with a second insulating paper layer between the second copper coil layer and the third copper coil layer. The number of turns of the second copper coil layer is less than that of the first copper coil layer, and a mounting space is reserved on the outer surface of the first copper coil layer. Limiting separators are arranged in the mounting space and are detachably connected to one end of the second copper coil layer, a plurality of groups of the limiting separators are distributed on the outer surface of the first copper coil layer in a circumferential direction, and first penetration gaps are formed between the limiting separators and the outer surface of the first copper coil layer. The third copper coil layer is distributed in a staggered manner with the second copper coil layer, and the sum of the number of turns of the third copper coil layer and the second copper coil layer is less than the number of turns of the first copper coil layer. Compared with the prior art, the application can improve the insulation performance and mechanical stability of the primary winding.

This invention relates to an electronic switch (1) for disconnecting current between first and second bipolar power terminals (10, 12), comprising: a semiconductor switch (3) having two semiconductors (30A, 30B), wherein the semiconductor switch (3) is adapted to switch currents of different polarities, and wherein the semiconductor switch (3) is arranged between two corresponding first terminals (101, 121) of the first and second bipolar power terminals (10, 12); and first and second fuse elements (5A, 5B) and a short-circuit switch (7), wherein the short-circuit switch is adapted to switch short-circuit current through at least one of the fuse elements (5A, 5B) to trigger at least one fuse element (5A, 5B) and disconnect the current between the first and second bipolar power terminals (10, 12), wherein the short-circuit switch (7) is arranged between two corresponding second terminals (103, 123) of the first and second bipolar power terminals (10, 12) and between the two semiconductors (30A, 30B). The invention also relates to a power grid and a method for operating an electronic current sensor.

The present invention relates to an enzyme-based electrochemical online sensor with a measurable service life. An enzyme-based electrochemical online sensor for detecting the concentration of one or more analytes in a measuring medium comprises at least one first electrode as a working electrode, at least one second electrode as a counter electrode, preferably a third electrode as a reference electrode, and an evaluation device. The first electrode, on which an enzyme-based redox reaction takes place, is formed to detect and transmit the generated electrical charge and to generate an electronic current related to the analyte resulting from the redox reaction from the start of the operation of the online sensor. The evaluation device determines the concentration of the one or more analytes from the generated electrical charge and determines a measured parameter derived from the generated electrical charge to determine the enzyme activity on the at least one first electrode, wherein the online sensor is designed to be installed in a process vessel and subsequently thermally sterilized.