1775 results about "Test power" patented technology

An apparatus and method for operating a non-volatile memory including an array of bit cells. A selection is made between an operational power supply and a test power supply, the test power supply being on-chip programmable. The non-volatile memory is operated in a operational mode if the operational power supply is selected, and in a test mode if the test power supply is selected.

A wireless power transfer system is disclosed that includes multiple levels of authentication and several different options for implementing theft prevention. The power station can perform a first authentication procedure to collect billing information of the device to receive power. If the first authentication succeeds, the power station then performs a second authentication procedure in which it sends one or more test power signals to the receiving device. The power station estimates the amount of power that should actually be received by the receiving device and compares the estimate to a reported value sent from the receiving device to ensure that the reported value is within an acceptable margin of the estimate value. If either authentication fails, the power station can take power theft prevention methods to prevent the receiving device from acquiring free power.

The invention provides an error test system and method for a digitized metering device. The error test system and method can meet requirements for whole error test and dissemination of the value of quantity of the digitized metering device in a semi-breaker wiring mode, and can simultaneously test and compare the whole error and the sum of a single error of an electronic transformer and a single error of a digitized electric energy meter by changing characteristic error influence quantity of the digitized metering device. The test system comprises the digitized metering device, a traditional standard current transformer, a three-phase electronic transformer calibrator, a three-phase standard digitized electric energy meter, a traditional three-phase standard electric energy meter and a three-phase test power supply used for outputting an electric load; the test method based on the test system compares and analyzes the whole error and the sum of single errors of dissemination of the value of the quantity in the digitized metering device by independently testing the whole error, the error of the electronic transformer and the error of the tested three-phase digitized electric energy meter, specific sources of the errors are determined, and operation and regulation are conducted according to actual working conditions.

The invention discloses an electronic mutual inductor test system and a test method. The electronic mutual inductor test system comprises a standard device, a signal conversion device, an error measuring device, a test power supply, a merging unit and a tested electronic mutual inductor, wherein the standard device is used for providing a standard signal serving as a test reference; the signal conversion device is used for receiving the standard signal and converting the standard signal into an analog signal which can be acquired by the error measuring device; the test power supply is used for outputting a primary voltage and a primary current for test use; the merging unit is used for receiving a digital signal output by the tested electronic mutual inductor and processing the digital signal; and the error measuring device is used for receiving the standard signal output by the signal conversion device and the digital signal output by the merging unit, and acquiring the ratio difference and the phase difference of the tested electronic mutual inductor. The electronic mutual inductor test system is particularly suitable for a field error test of the electronic mutual inductor, andhas the advantages of convenient test work, high reliability, small equipment volume, light weight, high test result accuracy and the like.

This is a device to avoid transformer flow upon switch on in idling and the method. The device includes more than one switching sets linked between the power switch and the transformer, each phrase of the alternating current is linked to at least one switching set; a side contactor parrell linked to the switching sets; a control unit; a front end voltage transformer for testing power voltage; a current transformer for testing transformer current; a back end voltage transformer for testing transformer voltage whose signal output is linked to the control unit and calculates the size and phase of the magnetic flux linkage of the internal pre-incharged magnetism of the transformer, and calculates the link time for the premier winding sets to decide the connecting time for the contactor, as well as the link time for other winding sets for contacting of the side switch sets.

The invention relates to a system and a method for testing power supply properties. The system for testing the power supply properties comprises a computer, a DC power supply, an electronic load supply, an oscilloscope and a heater. An operator can operate the computer to control the DC power supply, the electronic load supply and the heater to respectively provide DC input voltage, virtual load and environmental temperature required by measurement for a device to be tested, and utilizes the oscilloscope to acquire the property value / wave of an input power supply and the property value / wave of an output power supply of the device to be tested; and the oscilloscope sends the property value / wave of the input power supply and the property value / wave of the output power supply back to the computer for the confirmation of the operator, and the aim of automatically testing the power supply properties of the device to be tested is achieved. The system and the method can automatically test the power supply properties of the device to be tested at a preset environmental temperature to achieve the aims of saving time and saving human resources, and simultaneously can ensure that the device to be tested is in accordance with the requirement of each power supply property at the design stage.

The invention discloses a system and a method for checking the error of a high-voltage electric energy measurement device. The system comprises a test power source, a standard electric energy measurement system and a comparison display, wherein the error of the high-voltage electric energy measurement device is checked in the field by using the high-voltage current of the test power source, whichis generated by using three-phase high voltage as the test voltage of the test power source to carry out the high-potential clamping process on two / three groups of test current respectively, to excite the measurement device to be checked, and comparing the response output of the measurement device to be checked with that of the standard electric energy measurement system. The measurement system comprises a voltage sensor, a current sensor and a standard electric energy meter. The method comprises the following steps: determining the error of the system in measurement accuracy by the standard electric energy measurement system; and calculating the overall error according to the limit of the error, so as to control the requirements for the lowest accuracy level. The system of the invention is capable of determining the overall measurement accuracy (0.1) of the high-voltage electric energy measurement device to be checked.

The invention provides a method and a system for automatically testing power consumption of a mobile terminal. A current tester in the system is respectively connected with a PC (personal computer) end and the tested mobile terminal, and the PC end is not communicated with the tested mobile terminal in a test script executing procedure; the current tester is controlled by the PC end and is used for powering the tested mobile terminal and acquiring a current condition of the tested mobile terminal in the test script executing procedure; the PC end acquires preset time interval information of various test phases corresponding to a test case executed by the tested mobile terminal and controls and records the current condition within preset time interval when a test script is executed by the tested mobile terminal, and the current condition is acquired by the current tester; and operation for recording the current condition by the aid of the PC end and operation for executing the test script by the aid of the tested mobile terminal are synchronized by the tested mobile terminal owing to a dynamically set waiting time mode. The method and the system have the advantages that the power consumption of the mobile terminal can be automatically tested, labor and time costs are saved, and the accuracy of test results is improved.

The energy feedback type AC / DC electronic load simulator consists of two stages of PWM inverters with common DC bus as key parts. The input PWM inverter stage is connected through input filter inductor to the tested power source to constitute the load characteristic simulating part of electronic load; the output PWM inverter stage is connected through the isolating transformer and output filter inductor to the power network to constitute the energy feedback part of electronic load; and the load characteristic simulating part and the energy feedback part are independently controlled. The load characteristic simulating has single instantaneous current value control mode controlling the input load current amplitude and waveform, and the energy feedback has current and voltage double closed-loop control mode including phase lock loop to control the current waveform in the output network side and the bus voltage in the DC side. The present invention has small loss and high network side power factor.

The invention is a method of testing thermal resistance of power LED and its special chip, its main character: using special chip to simulate the designed power LED chip, they have the same structure of extension layer and electrode layer, when using it to make the power LED to be tested, also adopting the same or similar packaging technique to the designed power LED. It can accurately simulate the thermal working characteristic of the designed power LED, by testing and calculating, obtains the thermal resistance without adopting expensive special testing instruments, reducing the development cost of power LEDs.

The invention discloses a non-intrusive PLC abnormality detection method based on power consumption analysis. The method comprises the following steps: connecting a resistor in series between the power module of a PLC and the CPU module of the PLC, acquiring a voltage drop across the resistor by using a data acquisition device to obtain the power consumption information of the PLC in operation; subjecting the acquired power consumption to sample division, and extracting an appropriate feature set from each sample to form a characteristic value sample; training a neural network model based on a long short term memory unit according to the characteristic value sample during the normal operation of the PLC, and comparing a newly acquired to-be-tested power consumption characteristic value sample with the characteristic value information predicted by a LSTM network in order to determine whether the sample to be tested is an abnormal sample and thus determine whether the PLC is attacked. The method does not need to modify PLC hardware and software configuration, is non-invasive relative to an original industrial control system, can monitor the PLC in real time, and can detect the attack without the need to acquire the abnormal sample during the attack on the PLC.

The invention discloses lifetime ground test equipment for an ion thruster. By employing the equipment, special requirements of high pumping ability, small return sputtering sediment, high reliability, and high equipment integration of test equipment for lifetime tests of the ion thruster can be satisfied. The lifetime ground test equipment for the ion thruster comprises a main cabin vacuum container, a gate valve, an auxiliary cabin vacuum container, a vacuum pumping system, an ion beam target, an anti-sputtering screen, a thruster mobile mechanism, a quartz crystal microbalance QCM, a thruster divergence angle measuring system, a grid corrosion on-line monitoring system, a ground test power supply system, an equipment control system, a xenon supply system, a repressing system, a cooling water system, a pneumatic element air supply system, a liquid nitrogen storage and supply system, and a shooting illumination system. By employing the equipment, real results of the lifetime of the ion thruster can be obtained, and real and reliable test data can be provided for the evaluation of the lifetime and the reliability of the thruster.

The utility model relates to system for testing battery performance , which is designed to test charging and discharging performance of the battery of electronic equipment; wherein, the electronic equipment is provided with a charge-discharge operation program. The system comprises a controlling host machine and a power control equipment; wherein, the controlling host machine is used to produce a piece of configuration information which is to be transmitted through a first and second parallel transmission interfaces to the power control equipment, and the controlling host machine builds up a network connection with the electronic equipment connected with the power control equipment through network; the power control equipment comprises a plurality of connection ports, based on the control console to send configuration information production and the configuration information over the same test power supply, which covers the testing power output through a port to generate a plurality of test power supplies consistent with the configuration information. The test power supplies are respectively output to the electronic equipment through the connecting interfaces for charge-discharge tests. At the same time the controlling host machine sends the test operation orders to the electronic equipment through network, so as to enable the electronic equipment to implement charge-discharge operational procedures and conduct charge-discharge test on the battery.

A system for testing the existing protection schemes of a power converter. The system simulates the voltage regulator producing a voltage level below an under-voltage threshold. The system simulates the voltage regulator producing a voltage level above an over-voltage threshold. The system simulates a short in the power converter pulling down the input bus. The system simulates a short in the power converter pulling down the output bus. The system measures the system responses to these simulations against responses of a properly operating system and determines if the power converter's protection schemes are operating correctly.

One embodiment of the present invention provides a system that generates a synthetic workload to test power utilization in a computer system. During operation, the system monitors power utilization of a reference computer system while the reference computer system executes a workload-of interest, wherein the monitoring process produces a power profile. Next, the system determines characteristics of the workload-of-interest from the power profile. Finally, the system uses the determined characteristics to construct the synthetic workload, wherein the synthetic workload has similar power utilization to the workload-of-interest.

The invention discloses a method for detecting a power cable fault based on the two-time pulse mode. Compared with the prior detection method, the method is characterized in that the method organically combines the two prior pulse detection methods, namely the high voltage pulse detection method and the low voltage pulse detection method; and when DC high voltage is applied to various high resistance faults of the cable, the method does not record back and forth reflected waves self generated by the fault point, but according to the physical principle that the fault point is electrically discharged under the action of high voltage, and a short circuit fault is formed and kept for a period of time, and adds the two-time low voltage pulse to the fault phase of the cable during the period of time, thereby forming a detection waveform with little interference and strong identification like a low voltage method, and consequently detecting various high resistance faults of the power cable effectively.

The invention discloses a low-uncertainty stray loss test system of a motor, which is characterized by comprising a rectifying unit, a test power supply, a simulating constant torque load and a torque / rotating speed sensor, wherein the rectifying unit respectively connects direct current obtained by bridge-rectifying alternating current commercial power to the test power supply and the simulating constant torque load; the test power supply is sequentially connected with an electrical parameter measuring control, output control and test motor after modulating the direct current into frequency converting static alternating current power supply; the simulating constant torque load is connected with a load motor after modulating the direct current into a controllable power supply of a constant torque load; and the torque / rotating speed sensor is respectively connected with a data measurement and test motor and the load motor. Compared with the prior art, the invention has the advantages of simple test system, convenient operation, high test precision and good stability, can meet an efficiency test of an efficient and superefficient motor of 0.37-375kW, has an uncertainty value lower than 0.4 percent and lays a certain foundation for China to be dedicated to research and development of the high-efficiency motor.

The invention relates to a simulation test method for testing the lightning protection performance of a pole and tower grounding device of high-voltage power transmission line. The existing impulse grounding test process has the problem that a test model is simple and small in comparison with a real grounding device, or the problem that the simulation experiment has large gap from the real condition resulting from the large difference between a test power supply and the real lightning current. The simulation test method provided by the invention comprises the following steps: measuring soil resistivity of the test field; determining the position of a voltage reference point during the impulse grounding test according to the power frequency ground resistance measurement result of the grounding device; arranging voltage and current leads during the impulse grounding test; carrying out large-current impulse grounding measurement of the grounding device; measuring the power frequency ground resistance of the grounding device again in such a manner that all electrodes are located in the same positions as in the previous measurement; and analyzing the impulse test result. The simulation test method provided by the invention can narrow the gap between the simulation test and the real condition, and can be used for resistance reduction scheme optimization and impulse performance evaluation of the pole and tower grounding device of the high-voltage power transmission line.

The invention discloses a system for testing a power supply adapter, comprising a communication module, a control module, a load module, a measurement module and at least one power supply adapter interface. The communication module outputs a measurement control signal after receiving the measurement command of a computer; the control module outputs a first control signal according to the measurement controls signal; the load module loads a plurality of different loads for the power supply adaptor to be tested by at least one power supply adapter interface according to the first control signal; the measurement module measures the current value and the voltage value of the load according to a second control signal output by the control module, and returns the measured current value and the voltage value to the computer; the computer stores the acquired current value and the voltage value of all loads, compares the current and voltage values and displays the comparison result. The invention further provides a method for testing the power supply adapter; the system and the method for testing a power supply adapter have the advantages of low cost, convenient use and capability of remotely monitoring and testing a plurality of power supply adapters to be tested at the same time.

The invention relates to a device for testing power grid adaptability of a wind generator set, which comprises a converter built based on a power semiconductor switch device, wherein the input end of the converter is connected with a three-phase power supply and the output end thereof is connected with the wind generator set. Due to the adoption of the converter built based on the power semiconductor switch device, the device for testing the power grid adaptability of the wind generator set has the advantages of high power density, small volume, low cost and capabilities of bearing a majority of dynamic impacts caused by the wind generator set in the fault experiment process of the power grid to reduce the requirement of an experiment system on the capacity of the power grid, realizing the stepless regulation of voltage and frequency to conveniently and flexibly simulate various power grid faults, extend the test range, enrich test data and reduce the experiment period; and simulating various initial states of the power grid voltage prior to the power grid fault test to completely test the fault data of the wind generator set in various states of the power grid.

The invention relates to an online monitoring device, a detection circuit and a testing method for a junction temperature of an electronic power switch. The online monitoring device comprises a master control unit, a to-be-tested power electronic device, a current detection unit, a Vce(on) detection unit and an AD collection unit, wherein the master control unit comprises a device driving unit and a junction temperature calculation unit power electronic switch device, the current detection unit is used for collecting a current Ic flowing through the device in a conducting state; the Vce(on) detection unit is used for collecting a conducting pressure drop Vce of an IGBT in a certain rated time period in a conducting state and obtaining an equivalent conducting pressure drop signal Vce(on) by virtue of an analogue circuit in the Vce(on) detection unit; the AD collection unit is used for finishing the conversion from simulation current and voltage to digital signals; the device driving unit is used for providing a gate electrode driving signal Vg of a to-be-tested device and a switch signal Vp(mos) of the Vce(on) detection unit; and an IGBT driving unit is used for regulating a level fluctuation sequential relationship between a gate electrode switch control signal Vg of an IGBT module and the switch signal Vp(mos) of the Vce(on) detection unit in the IGBT driving unit.

The invention relates to a method for estimating the residual magnetism of a transformer core based on the slope of a local hysteresis loop, which comprises the following steps: S1, measuring the saturation hysteresis loop of a transformer core material; S2, using a JA model to simulate the hysteresis characteristic of the transformer coil; S3, getting the relation between the residual magnetism and the slope of a local hysteresis loop near a residual magnetism point based on the JA model, and fitting the relation to get a corresponding formula relation; and S4, powering on and testing a transformer coil under test, getting the positive and negative slope near the residual magnetism point through electromagnetic relation conversion, and calculating the residual magnetism value according tothe formula obtained in the previous step. The method of the invention is simple. There is only the need to apply small positive and negative excitation and record the voltage and current in the residual magnetism calculation experiment. No complicated online experiment is needed. The test power is low, and the experimental cost is low.

The invention relates to a method collaborating and optimizing the test data and the power consumption of testing large scale integrated circuits. The method relates to the technical field of the large scale integrated circuits and is proposed to resolve the problem that in the prior art of SOC test, no method is available to effectively reduce the test data and the power consumption of test at the same time. The method has the following steps: the compatibility of scanning units of the circuit is analyzed and accordingly the scanning units are classified into three categories; each category of scanning units are connected respectively, and a scanning chain with copying mechanism is built; a set of test vector is adjusted according to the new scanning chain structure; the test set is compressed by the method based on the compression of repeated data and a compressed test set TE is acquired. When in the testing process, the compressed data is fully recovered by a decompression circuit to be tested. The invention discloses a design method for the testability of integrated circuits, and reduces the power consumption of circuits in the testing process, thus ensuring the reliability and testability; furthermore, the invention can effectively reduce the quantity of test data, shorten the test process, and lessen the number of ATE channels.

The invention relates to a circuit for checking on-site accuracy of a current transformer under the condition of underload operations, comprising a test power supply, a voltage regulator, a power current transformer, a current transformer to be tested, a standard current transformer, a comparison type current transformer checking meter, a current comparator, a load box and a null indicator. In the circuit for checking the on-site accuracy of the current transformer under the condition of the underload operations, the on-site accuracy of the current transformer under the condition of the underload operations is checked by utilizing a magnetic potential balance method, therefore, a measurement error of the current transformer which works below 1% of rated current can be accurately measured, and the defect of the traditional method is effectively compensated. The circuit provided by the invention has the advantages of simple structure and convenience for use, and the measurement error of the current transformer can be directly read through the comparison type current transformer checking meter.

The invention discloses an intelligent detection method and a detection system device for a contaminated insulator and belongs to the technical field of contaminated insulator performance detection of a high-voltage transmission line. The method comprises the following steps of: hanging the detected contaminated insulator in an artificial fog room; adjusting a test power supply device so that a test program is adjusted to a working state; when an ultrasonic fog generator of the artificial fog room is started to fog to a saturated damping state, continuously increasing test voltage until the detected contaminated insulator is in a flashover state; acquiring the flashover voltage value by a data acquiring card; sending the flashover voltage value to an expert system, comparing the flashover voltage value with historical data in the expert system, and analyzing the data; and judging whether the detected contaminated insulator is safe or not. By the method and the device, the problems of poor accuracy of the test data and high investment of insulator string pollution flashover voltage test equipment in the prior art are solved, the external insulating level and the reliability of safe running of an insulator string are accurately judged, the probability of pollution flashover accidents is effectively reduced, and enormous indirect economic benefit is brought.

The invention relates to a test apparatus and a test method used for testing the distortion of a coil of a power transformer. The apparatus comprises an upper computer, a test unit, a DDS sweeping signal generator unit, a wide-frequency power amplifier unit and a power supply system. The test unit comprises a CPU, a data collecting unit, a logic control module and a communication unit; the CPU communicates with the upper computer through the communication unit and sends work instructions to the logic control module according to the instructions of the upper computer and simultaneously sends an instruction to the DDS sweeping signal generator unit to lead the unit to generate a corresponding sweeping signal; the sweeping signal generated by the DDS sweeping signal generator unit is transmitted to a coil on one side of the tested power transformer; the data collecting unit is respectively connected with two ends of the coil of the power transformer to collect data for regulation and convert the data into digital signals which are transmitted to the CPU for computation and then the computation result is transmitted to the upper computer through the communication unit; the logic control module is simultaneously connected with the CPU and the data collecting unit to control the data collection and transmission.

The invention discloses a power transformer winding fault simulation test method and belongs to the field of power transformer winding fault simulation test. The method comprises the following steps that: the high-voltage side of a universal power transformer is connected with an alternating current power supply through a voltage regulator, a resistor for limiting magnetizing rush current is connected in series between the voltage regulator and an electric switch; a bypass switch is connected in parallel at two ends of the resistor; the low-voltage side of the universal power transformer is connected with the low-voltage side of a tested power transformer provided with a winding fault; the high-voltage side of the tested power transformer is in short circuit; the voltage regulator is regulated, so that the tested power transformer acquires different required testing current; and a vibration signal on the surface of an oil tank of the tested transformer is acquired through a vibration sensor, and a current signal which reflects load of the tested transformer is measured through a current sensor so as to be processed and analyzed by a computer. The requirement of the power transformer winding fault simulation test on the power capacity is reduced, the method is easy in operation and readily available in parameters and has universality on similar transformers.

The invention belongs to the technical field of full automatic detection of power equipment and particularly relates to a system for testing a power quality monitoring device and a testing method of the system. The system comprises a detecting host, a standard source and the power quality monitoring device. The detecting host is connected with the stand source through a GBIP bus in a communicating mode. The standard source is electrically connected with the power quality monitoring device through a test signal line. The power quality monitoring device and the detecting host form a closed loop communication control system through the Ethernet. According to the system and the testing method of the system, the accuracy of power quality indexes, a data model and communication protocols can be tested, the automatic system detection and fault recognition alarm functions of standard source overload judgment, power quality monitoring device wiring correctness, closed loop testing environment integrity and the like can be achieved, the intelligence and the automation degree of testing the power quality monitoring device are improved, and the work benefits of testing the power quality monitoring device are increased.

The invention discloses a detection method for grid frequency, which mainly comprises the following steps of: (1) connecting a test power supply to a detection circuit, wherein the test power supply can generate a string of square wave signals corresponding to the grid frequency of the test power supply after being subjected to voltage reducing treatment by the detection circuit; (2) obtaining a time difference value Delta t1 of the square wave signals from rising edge interruption to first falling edge interruption by a micro-controller; (3) comparing a sine wave half-cycle time value T0 corresponding to the frequency of 200HZ with the value of Delta t1 to determine whether to store or not; (4) as described in the step (2), obtaining a time difference value Delta t2 of the square wave signals from rising edge interruption to first falling edge interruption by the micro-controller; (5) comparing the sine wave half-cycle time value T0 corresponding to the frequency of 200HZ with the value of Delta t2 to determine whether to store or not; and (6) calculating a cycle actual time value T and grid frequency according to the values of Delta t1 and Delta t2. With the adoption of the detection method, both the standard sine wave input grid frequency and the voltage stabilization precision difference grid frequency can be detected.

The invention provides an AC superposed DC synthesized voltage test power device. An output voltage can comprise a pure AC voltage, a pure DC voltage and an AC superposed DC synthesized voltage; the output AC component and DC component are independently adjustable respectively; and AC superposed DC voltage waveforms with different components are output as required. The technical scheme of the invention has great significance for research mechanism generated by partial discharge under AC and DC mixed field strength, influence of an AC / DC component on breakdown stress and effectiveness selection of proof stress of converting and transforming.