1088results about "Power supply testing" patented technology

The invention discloses a POL power supply automatic test method based on modular design, and belongs to the technical field of power supply test. The method comprises the following steps: firstly, under the control of an upper computer, automatically reading POL power supply basic parameters including key characteristic parameters such as input / output voltage, rated current and frequency from a preset Excel table, and establishing a judgment reference for testing; then, instrument initialization is completed, communication connection with test equipment such as an oscilloscope, an electronic load and a direct-current power supply is established, and configuration of initialization function parameters is completed; then, executing a measurement task of each core parameter of the POL power supply to be tested, and in the test process, executing a parallel measurement management mechanism, namely configuring each instrument parameter and channel state in real time according to a specific test item, and triggering a retry or interrupt logic under the conditions of communication abnormality, data timeout and the like until the test recovers a running state; and finally, after the test is completed, performing Excel storage and interaction on the standardized test data and the waveform screenshot, and finally safely exiting. According to the POL power supply automatic test method based on the modular design, the whole test process is divided into a plurality of serial or parallel function processing units such as parameter reading, instrument initialization, test execution and test management, data storage and interaction and the like, and high efficiency and usability of a test system are achieved.

Disclosed is a test device to test the operation of an MMC by fabricating only one or several SMs constituting the MMC testing under real-time operating conditions. The test device for a modular multi-level converter (MMC) includes a simulation model of an MMC having at least one arm to which sub modules (SMs) are serially connected, at least one test target SM among the serially connected SMs being replaced with a dependent voltage source; an arm current simulation circuit including an equivalent SM that implements the test target SM as actual physical hardware and an inverter that supplies current to the equivalent SM; and a control unit configured to control the arm current simulation circuit to correspond to an operation of the simulation model and set a voltage corresponding to a charge / discharge voltage of the equivalent SM of the arm current simulation circuit to the dependent voltage source.

The invention discloses an online early warning method and detection system for a power supply, and belongs to the technical field of power supply monitoring, and the method comprises the steps: collecting an electric stress parameter of a to-be-monitored power supply in real time based on an early warning sampling frequency, and carrying out the preprocessing; once the real-time electric stress value is greater than or equal to the early warning safety threshold value, determining that the event is a potential abnormal event, constructing an abnormal time window, carrying out abnormal feature analysis, and carrying out recessive parameter inversion in combination with a digital twinborn body to generate an abnormal feature set; and calculating a real-time health index, once a potential abnormal event is identified, correcting the health index, generating an event health index, calculating a health decline rate, predicting a health index in a future time period and carrying out health early warning by combining the abnormal feature set, so that cost increase of reversible abnormal excessive early warning is avoided, and damage caused by missed judgment and accumulation is prevented.

The invention discloses a standby power supply fault prediction system and method based on deep learning, particularly relates to the field of communication machine room operation and maintenance, and is used for solving the problems of insufficient early warning lead and unstable prompt caused by late, repeated and rough alarm labeling. The method comprises the following steps: acquiring a unified time reference generation event window set of multi-source time sequence data of a standby power supply link, rolling forwards to extract an early symptom fragment set and retaining a mapping relation, combining repeated labels by adopting a time migration estimation algorithm to form a weak label set and an advance target, supervising and training a deep learning model solidification configuration by using the advance target, and finally obtaining an early symptom fragment set. In the reasoning stage, a fragment screening process is reused to output an advance and a risk result, a rule updating suggestion is formed by matching a real event through consistency verification, a sequence is calibrated again in an off-line training period, and a time offset estimation algorithm and a fragment screening rule are judged to be realized.

The invention discloses a power supply test method for simulating an equipment load and electronic equipment, and relates to the technical field of electronics, and the method comprises the steps: transmitting test current information to a first control part through a management controller, the test current information being used for indicating a to-be-simulated specified load current of a first load module; according to the specified load current, the first control part controls the first load module to carry out current pumping on a power supply of the first load module; voltage data of the power supply of the first load module and current data of the power supply of the first load module are obtained through the first control part, and a first test result is obtained. The technical problem of insufficient accuracy and comprehensiveness of the power supply test method of the equipment load in the related technology is solved, and the technical effect of improving the accuracy and comprehensiveness of the power supply test method of the equipment load is achieved.

Disclosed is a power supply including: a power supply mainboard having a connector slot; a circuit module connected to the power supply mainboard through the connector slot, the circuit module including a detection device configured to send an anomaly signal in response to detecting an anomaly in the circuit module; and a digital management chip connected to the power supply mainboard and configured to, in response to receiving the anomaly signal from the detection device, identify a circuit module corresponding to the detection device that sends the anomaly signal as a faulty circuit module, and send fault information of the faulty circuit module to instruct to replace the faulty circuit module in a connector slot corresponding to the faulty circuit module.

The invention discloses a transformer substation AC power supply residual current detection method and device, and the method comprises the steps: carrying out the vector synthesis of three-phase current data and zero line current data, forming a current difference sequence, exporting a residual current reference curve, and carrying out the fluctuation analysis of the residual current reference curve, and judging the leakage characteristics. After effective leakage features are formed through harmonic elimination, dominant frequency components are locked through frequency spectrum decomposition; calibrating a leakage type identifier according to the dominant frequency component and forming segmented leakage distribution; a deviation degree is formed by means of segmented leakage distribution and residual current reference curve deviation analysis, a correction deviation value is formed through load fluctuation compensation, and a standard exceeding coefficient is formed according to threshold value comparison to detect abnormal nodes to form hidden danger data; establishing a judgment rule based on the hidden danger data and the leakage type identifier to form a detection evaluation index; and executing path tracking on the detection evaluation indexes to form leakage position information, forming a disposal priority through intensity analysis to generate a residual current detection report, and realizing leakage current classification identification and self-adaptive evaluation.

The present application relates to a charging pile fault detection circuit and a charging gun. In the charging pile fault detection circuit, an input end of a first switch is connected to an input end of the charging gun, an input end of an equivalent analog resistor is connected to an output end of the first switch, and an output end of the equivalent analog resistor is connected to an output end of the charging gun; an on-off state of the second switch is different from an on-off state of the first switch; a preset resistor and the second switch are connected in series between the input end of the charging gun and the equivalent analog resistor; and a sampling circuit is configured to sample an electrical signal applied to the equivalent analog resistor, wherein the electrical signal represents a fault condition of the charging pile. Thus, accurate fault detection of the charging pile is realized.

The invention discloses a DCDC converter power link health state monitoring system and method, and belongs to the technical field of power management, the system comprises a switch node current sampling module arranged at the front end of an inductor L of a DCDC converter, a load current sampling module arranged at the rear end of the inductor L, and a microcontroller unit (MCU); the microcontroller unit (MCU) synchronously collects the switch node current Isw and the load current Iload, and judges the health state of the DCDC power chip and the peripheral inductor L by analyzing the waveform characteristic parameters of the switch node current Isw. According to the invention, online diagnosis and early warning of power link parameter degradation can be realized, and the reliability and safety of the system are improved.

The invention discloses a test control method and system for a direct-current power supply, and relates to the field of simulation testing, and the method comprises the steps: constructing a three-dimensional adaptive model to complete the matching calibration of system software and hardware, and achieving the load calibration through the comparison of dynamic load simulation and actual measurement data; in the testing process, a three-stage starting mechanism is adopted to power on step by step, fault protection is configured, and parameter scanning and real-time recording are executed according to a preset mode and a testing point; a double-closed-loop feedback mechanism is introduced, an inner loop adjusts output parameters, and an outer loop predicts power grid disturbance and performs advanced compensation; a safety threshold value is dynamically generated in combination with real-time environment data, linkage protection of approaching early warning and overrun protection is achieved, and a reliable effective data set is formed through fusion processing and double verification of multi-source test data. The system has the advantages that the precision and intelligence of the whole test process are realized through dynamic load simulation, a multi-level safety protection system is constructed through a three-level starting mechanism, and the precision, safety and data value of the test are comprehensively improved.

The invention relates to the field of display screens, and particularly provides a fault self-diagnosis and early warning method and system for an LED large-screen switching power supply, a terminal and a medium, and the method comprises the steps: collecting the multi-dimensional operation parameters of the power supply in real time, and extracting the feature parameters reflecting the health state; comparing each characteristic parameter with a health model reference to realize grading evaluation of excellent state, slight abnormity or fault; performing trend prediction on the slightly abnormal parameters to obtain future numerical values of the slightly abnormal parameters; and calculating an overall health degree score based on a prediction result, and when the score is lower than an early warning threshold value, generating early warning information including suspected fault elements, severity levels and predicted residual life, and reporting the early warning information. Predictive maintenance is realized, and the reliability, the maintenance efficiency and the service life of the LED large-screen power supply system are improved.

An energy storage system and an insulation impedance detection method for an energy storage system. The energy storage system includes a plurality of energy storage converters, a plurality of energy storage units, one first insulation impedance detection apparatus, a plurality of second insulation impedance detection apparatuses, and a controller. The energy storage units are connected to direct current ends of the energy storage converters, and are correspondingly connected to the second insulation impedance detection apparatuses, and a parallel connection point of alternating current ends of the plurality of energy storage converters is connected to the first insulation impedance detection apparatus. When a first insulation impedance is abnormal, the controller controls the plurality of second insulation impedance detection apparatuses to detect corresponding second insulation impedances, and sends an alarm signal if there is an abnormal second insulation impedance.

The invention relates to the technical field of electric signal data analysis, in particular to a high-performance computing equipment power state analysis method and system based on modularization. The method comprises the following steps: in a modular assembly of a high-performance computing equipment power supply, collecting contact resistance change data of an equipment power supply connector through a distributed sensor network, and calculating a resistance change rate; carrying out partial discharge monitoring on a cable of an equipment power supply, and recording discharge capacity trend data; taking the resistance change rate and the discharge capacity trend data as equipment electric energy characteristic parameters; according to the invention, the accuracy, comprehensiveness, practicability and reliability of the power supply system are remarkably improved by accurately monitoring electric energy parameters, early warning and positioning mechanical faults, evaluating electromagnetic thermal coupling interference, comprehensively analyzing the power supply state and outputting a report.

The invention discloses a power adapter detection device with an automatic voltage regulation and control function, and relates to the technical field of detection equipment, a power adapter is conveyed to a fixing mechanism through a feeding mechanism, two clamping units are driven to work, so that the power adapter is clamped and fixed, and the power adapter is automatically regulated and controlled through a positioning unit according to the position of a plug pin of the power adapter. The position of the power adapter is adjusted again, the plug pin of the power adapter is aligned with the jack of the plugboard of the detection mechanism, the power adapter is lifted through the lifting mechanism, so that the plug pin is inserted into the jack of the plugboard, the socket of the output end of the power adapter is aligned with the jack of the detection mechanism through the wire arrangement unit, and the detected voltage is automatically regulated and controlled through the regulation and control mechanism. Therefore, the power adapters can be detected under different loads, the detected power adapters can be conveyed to a collecting position by arranging a discharging structure such as a mechanical arm, and then the detection process is completed.

The invention relates to the technical field of low-temperature testing, in particular to module power supply low-temperature testing equipment which comprises a machine body, a mechanical arm feeding set, a testing set, a first translation power mechanism and an air inlet mechanism are installed on the machine body, a plurality of testing bins which are separated in a sealed mode are arranged on the testing set, and at least one testing jig is arranged in each testing bin. The test fixture is arranged to position and place a to-be-tested product, the to-be-tested product is placed on the test fixture through the manipulator feeding group, and the test fixture is electrically connected with the positioned and placed to-be-tested product; the modular splitting of the bin cover, the test group main body and the air inlet mechanism is realized, namely the modular splitting of a sealing function, a positioning test function and a low-temperature air supply function is realized; when a test fixture or a circuit needs to be replaced, only the main body part of the test group needs to be replaced, and the bin cover and the air inlet mechanism do not need to be changed; similarly, the bin cover and the air inlet mechanism can be independently replaced or maintained, so that the operation and maintenance flexibility and convenience of the equipment are improved.

The invention provides a leakage current detection method, a power supply device and a storage medium, the leakage current detection method is applied to a scene that the power supply device is connected with at least one other measurement device besides a to-be-detected load device, and equivalent leakage impedance introduced by the at least one measurement device itself is quantified. In combination with the actual output voltage of the power supply device in the current scene working state, the leakage current value flowing through the measuring device is accurately calculated so as to compensate the current between the power supply device and the load device. Compared with the traditional scheme, the detection method actively measures and quantifies the current interference caused by the equivalent leakage impedance of the measurement equipment, and further compensates the leakage component in the total current measurement value supplied to the load by the power supply, thereby realizing the accurate reduction of the real current of the load, and improving the overall precision and reliability of the current measurement; meanwhile, the detection and compensation mechanism does not depend on complex hardware isolation and has the advantages of being low in implementation cost and high in adaptability.

The present invention is an unsupervised integrated method of instability detection and fault module positioning, including: acquiring a topological structure of a direct current (DC) microgrid and collecting electrical data of each node in the topological structure to construct a corresponding first enhancement dataset and a corresponding second enhancement dataset; constructing a fault type pool based on the topological structure; constructing a corresponding classification network based on a twinborn network framework; training the classification network using the prepared datasets to obtain a detection model; and inputting the electrical data of the DC microgrid to be detected to a detection model, to output whether the DC microgrid to be detected has system stability and a corresponding fault type. Further provided in the present invention is an unsupervised integrated device of instability detection and fault module positioning.

A method of monitoring health of a power semiconductor device includes: determining a steady state loading of the power semiconductor device; when it is determined that the power semiconductor device is under a steady state loading, monitoring a case temperature parameter relating to a temperature of the case of the power semiconductor device over a predetermined period, derive a normalised parameter from the monitored case temperature parameter and determine the health of the power semiconductor device based on the normalised parameter.

The invention relates to the technical field of fault data processing, and discloses a mobile energy storage equipment fault diagnosis early warning method and system, and the method comprises the steps: obtaining the operation data of a target energy storage object, analyzing the preprocessed real-time operation data, and obtaining a multi-dimensional situation field, the target energy storage object being an outdoor energy storage power supply; calculating the multi-dimensional situation field to obtain a synaptic weight trace of abnormal data, identifying antibody modals, and analyzing the stability of each antibody modal to obtain a modal confidence coefficient; according to the scheme, a dynamic cellular network and a multi-dimensional situation field are constructed, fault multi-parameter coupling dynamic evolution characteristics are accurately captured, deep causal inference is realized according to a synaptic weight trace, an antibody mode and a mode confidence coefficient, a root fault reason is locked through a root cause contribution degree, and a fault early warning instruction is generated in combination with fault outbreak potential energy. And therefore, non-professional outdoor personnel can be helped to quickly position the fault, and the diagnosis accuracy and the early warning timeliness can be improved.

This application relates to the field of radio frequency (RF) power supply technology, and discloses a gain calibration method, a dynamic impedance testing method, equipment, and dielectric. The gain calibration method includes: acquiring multiple RF power measurements, where the RF power measurements are the output power measurements of an RF power supply in an open-loop state under multiple load impedance values; performing two-dimensional interpolation fitting in the complex plane of reflection coefficient based on the load impedance values ​​and the RF power measurements to obtain a continuous power distribution; selecting a minimum RF power value in the complex plane of reflection coefficient based on the continuous power distribution to obtain a target minimum RF power value; and calculating the gain of the RF power supply based on the target minimum RF power value, the load impedance value corresponding to the target minimum RF power value, and a preset characteristic impedance value. The embodiments of this application can improve the accuracy of RF power supply gain calibration and reduce the impact of environmental noise and small impedance fluctuations.

A probe card includes a plurality of power lines that are electrically connected to the plurality of DUTs, a plurality of ground lines that are electrically connected to the plurality of DUTs and to each other, and a plurality of power compensation circuits that are electrically connected to respective ones of the plurality of power lines and respective ones of the plurality of ground lines, where the plurality of power compensation circuits are configured to generate and provide a plurality of compensated power supply voltages to the respective ones of the plurality of power lines, and where the plurality of compensated power supply voltages are configured to inhibit a variation of a ground voltage of the respective ones of the plurality of ground lines.

The invention relates to the technical field of secondary power supply testing, in particular to a special jig applied to secondary power supply aging testing and a testing device with the same, the special jig comprises a supporting seat, a floating seat, a limiting seat, a jig circuit board and a plurality of female terminals, the floating seat is movably installed between the supporting seat and the limiting seat, and the plurality of female terminals are fixed on the jig circuit board. The female terminal forms a plurality of petal bodies, and the plurality of petal bodies enclose a clamping groove into which a male terminal of a tested secondary power supply is inserted. During use, the floating seat is driven by external force to move, the petal bodies of the female terminal expand outwards by means of self elasticity to expand the clamping groove, and the tested secondary power supply male terminal is easily inserted into the clamping groove. After the floating seat is loosened by external force, the first spring enables the floating seat to move, the plurality of petal bodies are driven to be close to and folded inwards, and the clamping groove is contracted to clamp the male terminal, so that the male terminal and the female terminal are firmly combined, the terminals are prevented from loosening in the testing process, the double effects of easy plugging and firm connection are achieved, the action is simple, and automatic operation is easy to realize.

This invention discloses an AI-based spectral monitoring and early warning system and method for performance degradation of key power supply components, relating to the field of power supply component performance monitoring technology. The system includes the following steps: Under high-temperature, high-carrier excitation conditions, a phase-continuous mapping field characterizing nonlinear interactions is generated by establishing a time-frequency coherent baseline of multi-source signals and injecting micro-amplitude phase perturbations; a cross-scale energy differential inversion chain is constructed based on this mapping field to extract energy residuals and identify transient energy aggregations; a dynamic pseudo-peak constraint chain is formed through envelope self-reflection calibration; further, time-frequency drift correction and dynamic weight refeedback are performed to generate an adaptive health matrix; finally, the energy spectrum is topologicalized, and continuous monitoring and intelligent early warning of degradation risks are achieved based on topological perturbations. This invention achieves proactive identification and intelligent early warning of power supply component degradation by dynamically fusing energy and phase characteristics through time-frequency drift correction and the topological health matrix, thereby improving the accuracy of performance degradation monitoring for key power supply components.

The utility model relates to a universal module power supply tool applied to the field of power supply tools, which comprises a base, an adapter plate, a three-combination screw, a connector, a cushion block, a crown spring female hole, a hexagonal single-pass stud, a heat conduction pad and a heat dissipation cover plate. The test process is accelerated through three-hole same-potential test point switching, the production efficiency is greatly improved, the cross needle of the module power supply only needs to be inserted and disassembled once, the upper surface and the lower surface are in soft contact, the appearance of the cross needle and the power supply is effectively protected, the holes in the cushion block, the base and the switching plate provide convenience for the sealant pouring process, and the production cost is reduced. The heat dissipation teeth on the base enable an extra heat dissipation device to be not needed during testing, the tool can be compatible with all standard packaging and most customized module power supplies in the power supply industry, the part machining number is reduced, the tool manufacturing cost is reduced, and meanwhile the production cost is comprehensively saved for enterprises by protecting the cross pin and improving the production efficiency.

The utility model discloses a kind of test devices, belong to switching power supply technical field, specifically related to a kind of switching power supply high-precision test device, comprising: signal acquisition module, signal conditioning module, AD conversion module and control module;The utility model processes the voltage signal and current signal of acquisition by signal conditioning module, to further guarantee the accuracy of each acquisition signal, and can inhibit the generation of noise and error, while signal conditioning module in the signal of incoming acquisition is handled, measured signal is converted into digitalizable voltage signal, and according to different signal passage gear attenuation amplitude, gain is carried out respectively by program-controlled gain circuit, finally the component of aliasing frequency in the level signal of output is filtered out by anti-aliasing filter circuit, eliminate aliasing in band and prevent dynamic performance reduction;So the utility model can carry out high-precision monitoring according to different signals, to guarantee the stability and accuracy of test device work.

A control module that controls a motion permanent magnet motor to move an electric two-wheeled vehicle comprises an inverter that converts a DC voltage to an AC voltage and outputs the AC voltage to the motion permanent magnet motor, and a processor that controls the inverter. The processor switches off high-side and low-side switching elements of all arms of the plurality of phases after receiving a firing signal and before the motion permanent magnet motor rotates. It detects that a short-circuit fault occurs in any high-side switching element of the arms of the plurality of phases if a condition is not met that all phase voltages are kept constant to be equal to or less than a certain voltage for a certain period of time.

The invention provides an AC / DC power supply system fault early warning method and system, equipment and a storage medium, and belongs to the technical field of fault early warning, and the method comprises the steps: obtaining first data, second data and third data, the first data being multi-class monitoring data of an AC / DC power supply, the second data being environmental data of an environment where the AC / DC power supply is located, and the third data being environmental data of the environment where the AC / DC power supply is located; the third data is attribute data of the AC / DC power supply; performing dynamic dimension reduction on the first data based on the second data and the third data to obtain fourth data; and inputting the fourth data into a pre-trained fault early warning model to obtain a fault early warning strategy of the AC / DC power supply. According to the fault early warning method, system and equipment for the AC / DC power supply system, and the storage medium provided by the invention, more comprehensive and rapid fault early warning of the AC / DC power supply system can be realized.

The invention relates to the technical field of direct-current power supply management and fault monitoring, and discloses a multi-dimensional abnormity early warning monitoring method and system in direct-current power supply management, and the method comprises the steps: configuring a passive induction sheet in a central region of the top end surface of an explosion-proof valve of an electrolytic capacitor in a direct-current power supply; determining a signal acquisition pair between the passive induction sheet and the cathode of the electrolytic capacitor, and connecting a negative bias ADC channel and a polarity ADC channel in parallel on the signal acquisition pair; respectively monitoring a negative DC bias voltage signal and a polarity inversion signal of the signal acquisition pair through a negative bias voltage ADC channel and a polarity ADC channel; respectively analyzing the monotone increasing trend of the negative direct current bias voltage signal and the relaxation time of the polarity reversal signal; and based on the monotone increasing trend and the relaxation time, early failure early warning of the electrolytic capacitor in the direct-current power supply is realized. According to the invention, long-term, on-line and interference-free early warning of the early failure phenomenon of the electrolytic capacitor of the direct-current power supply can be realized under real working conditions.

A power supply apparatus (100) comprises an inverter (110), voltage and current measuring devices (120a, 120b), a temperature sensor (130), and an operation circuit (140). The inverter (110) comprises change-over switches (SW1-SW6). The voltage and current measuring devices (120a, 120b) are configured to measure the voltage (V1) and the current (I1) on the change-over switches (SW1-SW6). The temperature sensor (130) is configured to measure an initial temperature (T[0]) in an initial state. The operation circuit (140) is coupled to the voltage and current measuring devices (120a, 120b) and the temperature sensor (130). The operation circuit (140) is configured to: execute a power model (142), and calculate a first transient power of the change-over switches (SW1-SW6) on the basis of the initial temperature (T[0]), the voltage (V1), and the current (I1); and execute a thermal model (144), and calculate a first transient ideal temperature of the change-over switches (SW1-SW6) on basis of the first transient power. The power supply apparatus (100) calculates, in real time, the transient temperature of channel interfaces of the change-over switches (SW1-SW6) by measuring the voltage (V1) and the current (I1) on the change-over switches (SW1-SW6) of the inverter (110). The present invention also relates to a temperature measurement method (500) for a power supply apparatus, and an electrical system (ES1).