1074results about "Base element modifications" patented technology

The invention relates to the technical field of power electronic equipment testing, and discloses a special intelligent testing device and method for a power UPS, and the device comprises a multi-source power supply system which comprises a three-phase program-controlled variable-frequency power supply, a single-phase program-controlled variable-frequency power supply and a DC program-controlled power supply, the output voltage of the three-phase program-controlled variable-frequency power supply is 0-480V and is adjustable, and the output voltage of the single-phase program-controlled variable-frequency power supply is 0-480V; the output voltage of the single-phase programmable variable-frequency power supply is 0-280V and the frequency of the single-phase programmable variable-frequency power supply is 45-64Hz and adjustable; the output voltage of the direct-current programmable power supply is 50-1000V and adjustable; an electronic load system; a signal acquisition system; an embedded control system; and an upper computer software system. A three-phase program-controlled variable-frequency power supply, a single-phase program-controlled variable-frequency power supply and a direct-current program-controlled power supply are integrated to form a multi-source power supply system, a resistive and rectifying dual-mode electronic load is combined, millisecond-level synchronous switching of a voltage level and a load state is realized through an embedded control system, a closed-loop test capability of multi-dimensional performance of the power UPS is formed, and the test efficiency is improved.

The invention relates to the technical field of capacitance compensation matching, in particular to a dynamic tuning capacitance compensation matching method and system for a transformer simulation test. The method comprises the following steps: before a test is started, establishing a digital twin model based on parameters of a transformer to be tested, identifying a systematic measurement error source caused by inherent characteristics of a system through simulation, and generating error source correction parameters; in the test period, voltage and current original waveforms containing electrical disturbance in a test loop are obtained in real time through high-frequency synchronous sampling; a mixed disturbance separation model is used, the collected original waveform and the generated error source correction parameters are used as input, and random measurement disturbance components caused by load dynamic changes are calculated and separated in real time; and based on the separated disturbance component, driving a dynamic capacitance compensation module to generate a compensatory electric signal which is equal to the disturbance component in size and opposite to the disturbance component in phase, and injecting the compensatory electric signal into a test loop so as to realize active disturbance cancellation. According to the invention, the measurement precision of the transformer simulation test can be improved.

The invention belongs to the technical field of electrical safety, and particularly discloses an insulation resistance intelligent detection system and method for an energy storage converter, and the system is based on a bridge balance structure, integrates a temperature and humidity sensor and a voltage sensor, and collects environment parameters and bridge unbalance signals in real time. A digital potentiometer and a resistor array are driven through a PID algorithm to dynamically adjust bridge balance, and environmental interference is eliminated in combination with a temperature and humidity compensation model; and carrying out intelligent analysis on the preprocessed multi-dimensional data by utilizing a band-pass filtering and detection model, and outputting a high-precision insulation resistance value. The method achieves full-automatic detection, is high in precision, is quick in response, is suitable for complex working conditions, and remarkably improves the reliability of the insulation performance evaluation of the energy storage converter.

The invention discloses a target impedance simulation circuit, an element parameter determination method and an impedance simulation jig. The target impedance analog circuit comprises a plurality of RC modules, wherein each RC module comprises a resistor unit and a capacitor unit which are connected in series; part or all of the RC modules are connected in parallel to simulate impedance data of a to-be-measured target. According to the technical scheme provided by the invention, the RC module is adopted to simulate the impedance value, so that the impedance behavior characteristics of the specified object under different frequencies can be accurately simulated, and the device can be flexibly and repeatedly used.

The invention provides an automatic testing device for an electrical interface of hardware equipment, which comprises a core control unit, an AT32F415CBT7 single chip microcomputer, an RS232 serial port testing interface and an RS485 serial port testing interface, the test unit comprises eight paths of optical coupling isolation switching value input / output interfaces, a test module power supply input interface, a 24V power supply input interface of equipment to be tested, a state indication LED module and a vacancy detection module which are respectively used for host communication and equipment test, and a travel switch is adopted to detect the occupation state of the test unit, wherein the 24V power supply input interface of the equipment to be tested is powered by an ejector pin. According to the invention, the efficiency and accuracy of hardware equipment interface function testing can be improved, the labor cost is reduced, and batch detection requirements are met.

The invention discloses a differential noise traction system and a differential signal noise parameter measurement method and device, and belongs to the field of chip measurement. The system is characterized in that a vector network analyzer comprises four ports, the input ends of two impedance tuners are respectively connected to a differential output port pair of the vector network analyzer, the output ends of the two impedance tuners are respectively connected to the differential input end of a tested device, the differential output end of the tested device is connected to the receiving end of a noise receiver, and the noise receiver is connected to the output end of the noise receiver. The output end of the noise receiver is respectively connected to a differential receiving port pair of the vector network analyzer; the direct-current power supply is used for supplying power to the tested device and the switch controller, and the switch controller is used for controlling an internal switch of the noise receiver; the differential output port pair generates a differential signal; the differential receiving port pair is used for receiving noise power of a differential signal; and the impedance tuner is used for adjusting the impedance point, so that the differential signals input to the tested device correspond to different differential impedances. The method can improve the measurement precision.

The invention discloses a TVS tube state monitoring circuit and a protection circuit of an EFUSE circuit, and relates to the technical field of electronic fuses, and the protection circuit comprises a fuse, a first switching circuit, a second switching circuit, a short circuit detection circuit, an open circuit detection circuit and a control module. And the control module judges whether the TVS tube is open-circuited or short-circuited according to feedback signals of the short-circuit detection circuit and the switch detection circuit, so that the state of the TVS tube is monitored in real time.

The invention relates to a current measuring apparatus for redundant measurement of an electric current (I) with a low-resistance current measuring resistor (1) for current measurement according to the four-lead technique and with a magnetic field sensor (14). The invention provides that the electric current (I) to be measured in the current measuring apparatus is divided into a main current path with a main current (I1) and a secondary current path with a secondary current (I2), the main current path and the secondary current path together forming a parallel circuit. The low-resistance current measuring resistor (1) is arranged in the main current path and has the main current (I1) flowing through it, while the magnetic field sensor (14) is arranged in the secondary current path and measures the secondary current (I2).

The invention provides a zero-carbon battery charging and discharging test system and method. The system comprises a plurality of energy storage energy modules, a plurality of energy allocation modules connected with the plurality of energy storage energy modules, a plurality of non-isolated high-efficiency charging and discharging machines, a plurality of test side intelligent switches connected with the plurality of non-isolated high-efficiency charging and discharging machines, and a plurality of tested batteries connected with the plurality of non-isolated high-efficiency charging and discharging machines. The first controller is used for collecting state information of the plurality of energy storage energy modules and controlling working states of the plurality of energy allocation modules so as to adjust electric energy exchange between the plurality of energy storage energy modules and the direct current bus; the DC bus is connected with the plurality of energy allocation modules and the plurality of test side intelligent switches, and is used for establishing an electric energy transmission path between the plurality of energy storage energy modules and the plurality of tested batteries. And the second controller is connected with the plurality of test-side intelligent switches and is used for controlling on and off of the plurality of test-side intelligent switches so as to realize charging and discharging tests of the plurality of tested batteries.

A chip test system and method are provided. The chip test system includes a memory chip, a test device, and a test interface. The memory chip has a power pad and a driver pad coupled to the power pad. The test device is configured to provide a test signal. The test interface is configured to provide multiple signal transmission paths. The test device transmits the test signal to the power pad of the memory chip through the test interface, obtains a monitor voltage generated by the driver pad, and adjusts a test voltage value of the test signal according to the monitor voltage. The test device comprises a precise measurement unit configured to measure the monitor voltage, and a switch element coupled to the precise measurement unit, and when the memory chip starts to be tested, the switch element is turned on.

The invention relates to a Hall thruster discharge disturbance acquisition device and a Hall thruster discharge disturbance acquisition method, which are used for solving the technical problems of relatively low accuracy and reliability of an acquisition result of a Hall thruster discharge disturbance acquisition device in the prior art. According to the Hall thruster discharge disturbance acquisition device provided by the invention, the oscilloscope is used for measuring voltage and current changes of anode and cathode ignition, when the changes exceed a preset value, an acquisition triggering signal is sent to the high-speed camera while electric signal acquisition is automatically triggered, and the high-speed camera synchronously acquires an optical signal; and dual acquisition of photoelectric signals is realized.

The invention relates to the technical field of battery production, in particular to a ternary lithium battery production quality detection method and device.The ternary lithium battery production quality detection device comprises a temperature control box, a fixing rod is fixedly connected to the inner side of the temperature control box, a detection mechanism used for battery current detection is installed on the outer side of the fixing rod, and the detection mechanism comprises a second C-shaped installation plate; the inner wall of the second C-shaped mounting plate is provided with a maintenance mechanism used for preventing spontaneous combustion of a battery, the inner wall of the second C-shaped mounting plate is fixedly connected with a first mounting plate, the front end of the first mounting plate is provided with two sets of symmetrical CCD cameras, and a servo motor drives a fixed rotating shaft and a gear transmission system; a second C-shaped mounting plate drives a direct-current clamp meter to rotate, meanwhile, a battery body rotates reversely through a synchronous belt and a gear structure, 360-degree surrounding scanning of the detection ring on the outer side of the battery is achieved, a second electric telescopic rod drives an arc-shaped cleaning plate to be attached to a pole, an oxide layer is automatically removed, and contact resistance increase caused by impurities is avoided.

A test switch assembly for testing electrical switchboard devices is provided. The test switch assembly includes a test switch including a handle, the handle having a first color. The handle includes a label holder including a front, the label holder defining a label slot in the front, the label slot sized to receive a label. The handle further includes a handle body extending from the label holder and defining a tie bar aperture sized to receive a tie bar configured to connect the test switch with one or more other test switches in the test switch assembly. The test switch assembly further includes an indicator coupled with the handle body of the test switch, the indicator having a second color different from the first color, the indicator exposing the tie bar aperture.

The invention provides an AC solid-state power controller isolation voltage acquisition circuit device, and the device comprises an AC voltage acquisition unit which is used for achieving the voltage acquisition of an AC solid-state power controller; the isolated power supply unit is used for providing an isolated power supply for the alternating-current voltage acquisition unit; the reference voltage unit is used for providing reference voltage for the AC voltage acquisition unit; and the power supply unit provides a power supply for the AC voltage acquisition unit. According to the technical scheme of the invention, the size of the sampling circuit can be reduced while voltage acquisition is realized, and the acquisition precision and safety of the sampling circuit are improved.

The invention provides a simulation method and system with controllable split-phase voltage drop time difference, and relates to the technical field of electric power testing, and the method comprises the steps: adjusting voltage through a three-phase voltage regulator, employing a bidirectional silicon controlled rectifier and IGBT hybrid switch structure to achieve voltage drop, collecting and processing a three-phase voltage signal through a digital signal processor, and extracting zero crossing point information; and a control pulse signal with phase compensation is generated, the conduction time sequence of the switch element is controlled to realize soft switching, and the industrial computer receives and processes the signal and displays a voltage drop waveform. The split-phase voltage drop time difference can be accurately controlled, and the simulation precision and the system reliability are improved.

The invention discloses a method for monitoring the insulation state of a stator winding of an injection unit based on neutral point harmonic frequency sweeping. The invention provides an active online monitoring method based on harmonic injection for stator winding insulation of a full-power variable-speed pumped storage unit. A common-mode loop is constructed for a motor stator winding of a network side transformer neutral point ungrounded system through a motor neutral point grounded transformer, and therefore online monitoring of the insulation state of a motor stator is achieved. In order to solve the measurement problem of the full-power variable-speed pumped storage unit under the large-current working condition, a neutral point outgoing line current detection technology is adopted. A machine end large current interference area is avoided, monitoring is carried out on the primary side of the grounding transformer, transmission errors are avoided, and the measurement precision and reliability of insulation monitoring signals are remarkably improved. According to the invention, harmonic injection is carried out by avoiding an inherent common-mode component of a unit, a monitorable leakage current signal is enhanced, and the accuracy of insulation equivalent capacitance calculation is ensured.

The invention belongs to the technical field of aerospace, and discloses an aviation electrical system insulation detection device which comprises a shell and an overall frame serving as the insulation detection device. The display screen is used for displaying measurement data in real time; the function key group integrates the functions of measurement mode switching, data retention and insulation test starting; according to the conversion assembly, through the linkage design of the rotating disc and the rotating switch, the problem that functions cannot be switched when the two hands of a traditional insulation detection device are occupied is thoroughly solved, a worker only needs to rotate the rotating disc with the hand of supporting equipment, the rotating switch can be driven through the driving mechanism, switching of insulation test voltage gears is completed with one hand, and the working efficiency is improved. Compared with a traditional device which needs to frequently put down a connecting line and manually rotate a switch, the design simplifies the operation steps from three steps to one step, shortens the single function switching time, and remarkably improves the efficiency and safety of high-altitude operation or narrow space detection.

The invention discloses a formation and capacity grading parallel detection system based on a high-voltage direct-current bus. A press device comprises a direct-current switch and at least one set of pull-out type charging and discharging probe module. And the input end of the direct-current switch is connected with the output end of the PCS equipment. Each charging and discharging probe module adopts a pull-out structure and comprises a mechanical frame, and a high-voltage direct-current bus, a bidirectional conversion module and a probe assembly which are integrally mounted in the mechanical frame; the high-voltage direct-current bus input end is connected with the direct-current switch output end; the bidirectional conversion module comprises two stages of conversion units; the first conversion unit is used for reducing the first voltage of the high-voltage direct-current bus into the second voltage or reversely increasing the voltage; the second conversion unit reduces the second voltage to the voltage required by charging and discharging of the battery or boosts the second voltage; the probe assembly is connected to the output end of the second conversion unit. The system is compact in structure, high in charging and discharging efficiency and convenient to maintain, and cables are saved.

Systems and Methods for capacitance testing of a unit under test with parasitic capacitance directed to a guard rail. The system includes test points, wherein the plurality of test points are divided into at least two groups; a stimulus source; a first group guard relay electrically connected to each of the test points in a first; a second group guard relay electrically connected to each of the test points in a second; a guard rail coupled to the first group guard relay and the second group guard relay; a first group return relay electrically connected to each of the test points in a first group; a second group return relay electrically connected to each of the test points in a second group; a current measurement rail coupled to the first group return relay and the second group return relay; a current meter coupled to the measurement rail; and a controller.

According to the radio frequency device strong electromagnetic pulse damage on-line monitoring method and system, the incident power, the output power and the reflection power of the tested radio frequency device are monitored in real time, then whether the tested radio frequency device is damaged or not is judged through comprehensive comparison and analysis, and the function of monitoring the state of the tested radio frequency device on line in real time is achieved. The device is used for monitoring the damage state of the radio frequency device under the strong electromagnetic pulse injection test in real time, the test efficiency is improved, the damage probability to the strong electromagnetic pulse injection source after the radio frequency device is damaged is reduced, and the test range of a traditional off-line measurement method of the test is expanded. The device is used for on-line damage monitoring during the strong electromagnetic pulse injection test of the radio frequency device, the test efficiency can be improved, test equipment can be protected, the defects of traditional off-line detection can be overcome, and the device has important significance in carrying out the strong electromagnetic pulse injection effect test of the radio frequency device and obtaining the damage threshold value of the radio frequency device.

The invention relates to the technical field of charge and discharge detection, and discloses a multichannel EIS charge and discharge in-situ test system and method, and the system comprises a DC charge and discharge module which is used for carrying out the constant-current, constant-voltage or cyclic charge and discharge test of a battery; the alternating current impedance test module is connected in parallel with the direct current charging and discharging module and is used for applying an alternating current disturbance signal to the battery and collecting impedance response in the charging and discharging process; and the unified clock module is used for providing a synchronous triggering reference signal for the direct current charging and discharging module and the alternating current impedance test module. The direct current charging and discharging module and the alternating current impedance test module are designed to be of a parallel connection normally-connected structure, no relay switching is needed, continuous and uninterrupted online EIS test in the charging and discharging process is achieved, contact resistance drift and transient errors caused by physical circuit switching in a traditional scheme are effectively avoided, and the reliability of the EIS test is improved. And the stability and repeatability of the test are obviously improved.

The invention relates to a program-controlled resistor card and a program-controlled resistor smooth control method and device thereof. The method comprises the following steps: acquiring a resistor card code combination corresponding to a current resistance value and a target resistance value; a difference mask is calculated through an XOR operation, and a relay set needing to be changed is identified; on the basis of a greedy algorithm strategy, a relay enabling the instantaneous resistance value to be closest to a target value is selected from the difference mask identification set in a successive single-step switching mode for operation; iteratively executing switching and state updating until the difference mask is zero; and finally outputting a switching completion signal. The device comprises a state acquisition module, a difference analysis module, a switching decision module and a driving execution module, realizes smooth transition in a resistance change process through ordered single-step relay switching control, effectively avoids extreme states such as an open circuit or a short circuit, remarkably improves switching precision and system reliability, and is suitable for the fields of precision test measurement and automatic control.

The invention belongs to the technical field of nuclear power, and particularly relates to a ground capacitance measurement method based on series capacitance and high-frequency signal injection. In order to solve the problem that a traditional signal injection method cannot accurately calculate the ground capacitance level of a power distribution network, the invention provides a ground capacitance measurement method based on a series capacitor and high-frequency signal injection. The leakage inductance of the voltage transformer is accurately measured by injecting the high-frequency signal, so that a resonance point is convenient to find during frequency sweeping, and the resonance point measured during frequency sweeping is more accurate.

The invention relates to an intelligent testing device for a repeating high-power intermediate relay, which comprises a programmable direct-current excitation power supply module for providing starting voltage for the intermediate relay, and is characterized in that the intermediate relay is respectively connected with a high-precision power measurement module and a high-speed action time acquisition module; the high-precision power measurement module and the high-speed action time acquisition module are both connected with the intelligent criterion analysis module, and the intelligent criterion analysis module is connected with the man-machine interaction and communication module. The intelligent testing device for the intermediate relay is compact in structure, convenient to use and accurate in measurement, has intelligent analysis capability, supports various relay brands and models, is compatible with a 220V / 110V system, has good universality and expansibility, can be widely applied to occasions such as acceptance inspection, field maintenance and troubleshooting of a relay protection device, and has wide application prospects. Therefore, the reliability and safety of the operation of the power equipment are improved.

The invention relates to the technical field of semiconductor device testing, and discloses a dynamic on-resistance testing system and method, and the system comprises a current source module, a voltage source module, an acquisition module, a drive control module, and a main control module. The current source module is used for outputting a driving current to a tested device, the voltage source module is used for applying a bias voltage, the driving control module controls the on-off of the tested device, and the main control module coordinates the operation process of each module through a preset operation time sequence, so that the staged measurement of the dynamic on-resistance is realized. According to the system, through time sequence synchronous control and modular design, the problems of inaccurate sampling points caused by time sequence deviation, test errors caused by lead interference and insufficient power supply precision in the prior art are solved, and measurement results of initial on resistance, leakage current and steady-state on resistance of tested equipment can be accurately obtained; and reliable data support is provided for device performance evaluation.

The invention discloses a fault current calculation method and system for a high-voltage alternating-current submarine cable grounding system and a storage medium, and the method comprises the following steps: enabling a power supply device and an electric device to be equivalent to an impedance and series voltage source combination and a load impedance based on the Thevenin equivalence theorem; in combination with the double-end grounding characteristic, a submarine cable loop is equivalent according to a pi type, and a three-phase equivalent circuit is constructed; determining a fault phase, and dividing the submarine cable as a left side and a right side by a fault point; a voltage loop equation is listed based on the Kirchhoff theorem, and a matrix recursion rule is deduced in combination with a double-side elimination principle. And establishing an analytic relationship between the main sections of the submarine cables at the power side and the short-circuit side and the fault circulating current according to a recursion rule. And with a fault point current equation as a boundary condition, left sheath fault circulation distribution is solved simultaneously. And repeating the steps on the right side to obtain right side distribution so as to obtain fault phase whole-line distribution. According to the method, the circulation distribution can be accurately calculated, the fault analysis accuracy and efficiency are improved, and support is provided for submarine cable operation and maintenance and the like.

The invention relates to a development type single-phase earth fault real-model test device and a control method, the development type single-phase earth fault real-model test device is connected in a whole power grid and comprises a fault intelligent generation module, and the fault intelligent generation module comprises a dynamic resistance simulation unit and an intelligent switching control system. And the intelligent switching control system is used for controlling the access resistance value and the access time of the resistor in the dynamic resistance simulation unit. The dynamic resistance simulation unit structure is of a three-level resistance topology and is combined with a mixed switching matrix of a vacuum relay and a solid-state relay. The intelligent switching control system is used for realizing the switching of the resistor at a current zero crossing point, the intelligent switching control system comprises a low-power-consumption control circuit and a signal acquisition circuit, the structure is matched with the control method, the continuous or step dynamic change of the grounding resistor can be accurately simulated, the problem of transient impact in the resistor switching process is solved, and the stability of the grounding resistor is improved. And a standardized and quantifiable test platform is provided for performance assessment of power distribution network fault handling equipment.

The utility model provides an electrical parameter measuring circuit, an electrical parameter measuring unit comprises a plurality of signal driving ends and a plurality of voltage output ends, each signal driving end corresponds to one voltage output end, and the measuring signal output end of each analog switch is correspondingly connected with one signal driving end; each sampling output end of the multiplexer is connected with the input end of the signal conditioning unit, and the voltage input end corresponding to the sampling output end is connected with one voltage output end in the electrical parameter measuring unit; the input end of the analog-to-digital conversion unit is connected with the output end of the signal conditioning unit, and the output end of the analog-to-digital conversion unit is connected with the input end of the main controller. In the scheme, a discrete scheme is replaced by the chip for measuring the electrical parameters, a single chip realizes the functions of voltage and current conversion and amplification, digital-to-analog conversion, clamping, calibration and the like, and an external analog switch circuit is matched to realize single-board multi-channel test, so that the reliability of chip test is improved, and the test efficiency is improved. And the board occupation area is reduced.

The invention provides a multichannel platinum thermal resistor program control simulation card and method, the multichannel platinum thermal resistor program control simulation card comprises a resistor gating array, a relay driving array, a microcontroller module, a communication interface module and a power supply module, and the method comprises the following steps: inputting a temperature value in an upper computer; the upper computer carries out temperature-resistance value conversion; the upper computer sets resistance precision; the upper computer packages the resistance value data into a data packet according to a communication protocol, and the data packet is sent to a microcontroller of the lower computer after CRC verification; the microcontroller receives the data packet, analyzes the data packet according to a communication protocol after performing CRC (Cyclic Redundancy Check), and obtains resistance value data; the microcontroller performs'resistance value-I / O state 'conversion; the microcontroller sets an I / O state. The method has the beneficial effects that the integration and automation levels of test equipment are remarkably improved, and the test failure risk caused by the problems of instrument consistency and the like is reduced.

The invention relates to a mining remote leakage protection calibration system and method. The system comprises a software platform, a looped network switch, a wireless substation, a multi-stage protector and an adjustable linear leakage test resistance box. And the software platform is connected with the wireless substation through the ring network switch, broadcasts a synchronous timestamp and controls the resistance adjustment of the resistance box so as to measure the action current and the tripping response time of the protector. And when the measurement result exceeds a preset boundary value, the software platform starts a self-calibration program and dynamically corrects the set value of the protector. Through a linear resistance adjusting mechanism of the adjustable linear leakage test resistance box, the action current value of the protector is accurately obtained, automatic calibration during hardware aging is realized, manual power-off maintenance is not needed, and the reliability of a power supply system is improved. Meanwhile, a high-precision clock synchronization technology is adopted, tripping response time is accurately obtained and automatically calibrated to a safety response range, and safety risks are avoided.