298 results about "Volt" patented technology

The invention relates to the technical field of photovoltaic cell testing, and discloses a volt-ampere characteristic curve testing system for a high-power photovoltaic cell. The system comprises a multi-source data acquisition module, a cross-modal feature fusion module, a volt-ampere curve reconstruction module and a dynamic parameter adjustment module. The multi-source data acquisition module synchronously acquires real-time irradiance time sequence data, assembly temperature distribution data and a current and voltage sampling data set of a target photovoltaic array; the cross-modal feature fusion module performs feature interaction processing on the multi-source data to generate a fusion electrical feature matrix; a volt-ampere curve reconstruction module performs dynamic curve fitting based on the matrix to generate a volt-ampere characteristic curve under a standard test condition; and the dynamic parameter adjustment module executes parameter calibration according to the curve and outputs a test parameter dynamic adjustment strategy to the acquisition module. The system can eliminate environmental interference, optimize test parameters, guarantee long-term stable operation, and meet accurate test requirements of high-power photovoltaic cells.

The invention discloses a lightning arrester resistor disc nonlinear conductivity fitting method and system based on a temperature correction coefficient, a medium and equipment, and the method comprises the steps: calculating a current-voltage relation of a lightning arrester according to the volt-ampere characteristic of the lightning arrester and the actual size and material parameters of each component in the lightning arrester, and converting the current-voltage relation into a current density-electric field intensity relation; processing the volt-ampere characteristic interpolation curve in a segmented manner by adopting a logarithm domain processing method and fitting the volt-ampere characteristic interpolation curve; calculating a nonlinear conductivity temperature correction coefficient according to the direct-current reference voltage of the resistor disc of the lightning arrester at different temperatures; calibrating the reference point of the temperature correction coefficient to obtain an equivalent nonlinear conductivity curved surface based on the temperature correction coefficient; performing goodness-of-fit calculation on the obtained equivalent nonlinear conductivity curved surface, and if the goodness-of-fit is relatively high, outputting the equivalent nonlinear conductivity; and if the goodness of fit is relatively low, performing segmentation fitting on the volt-ampere characteristic curve again until the goodness of fit of the equivalent nonlinear conductivity curved surface is relatively high.

A 48-volt electric sprayer machine including a plurality of blowers, each configured to produce an airflow; a plurality of nebuliser nozzles, each to deliver a nebulised product in the airflow produced by the blowers; an electric pump connected to the nozzles and supplies a flow of product to the nebulisers. Each blower is equipped with an electronic controller, connected to the electric motor and configured to control the actuation of the electric motor. Each nebuliser nozzle is equipped with a control solenoid valve, adapted to control the delivery of product. The pump is equipped with an electronic controller; the controllers of the blowers, the control solenoid valves and the controller of the pump are connected with digital transmission to an electronic control unit to control the independent actuation of each thereof, as a function of the conditions of use of the sprayer machine.

An electrical combination, a tool system, an electric motor, a battery pack, and operating and manufacturing methods. The tool may include a tool housing, a motor supported by the tool housing, the motor having a nominal outer diameter of up to about 80 millimeters (mm), the motor being operable to output at least about 2760 watts (W), and a tool terminal electrically connected to the motor; a battery pack including a pack housing defining a volume of the battery pack, the volume being up to about 5.2×106 cubic millimeters (mm3), battery cells supported by the pack housing, the battery cells being electrically connected and having a nominal voltage of up to about 80 volts (V), and a pack terminal electrically connectable to the tool terminal to transfer current between the battery pack and the tool; and a controller operable to control the transfer of current.

An electronic device includes a substrate, a first signal line, and a driving circuit. The first signal line and the driving circuit are coupled to each other and are disposed on the substrate. The driving circuit includes at least one switch element and a driving element. The switch element includes a first control end. The driving element is coupled to the first control end to provide a first voltage signal at the first control end. The first voltage signal has a first maximum amplitude. The first maximum amplitude is greater than or equal to 8 volts and less than or equal to 22 volts.

The invention discloses multipurpose electrotherapy equipment, and relates to the technical field of medical instruments, in particular to the multipurpose electrotherapy equipment which comprises a box body, a motor in the box body, a rotating head driven by the motor, a connecting column, a supporting rod, a connector, a piston rod and a power generation plate. After the motor works, the piston rod is driven by the transmission mechanism to reciprocate to impact the power generation plate to generate current. Generated current is transmitted to a current distributor through a current transmitter and a first wire, the current distributor can steplessly adjust output voltage between 6 volts and 25 volts through a current adjusting button according to pathological types, and the current is transmitted to application ends such as a foot pedal through a second wire to be used for electrotherapy. The device is provided with a display screen for monitoring electrical parameters in real time and ensuring treatment safety. The equipment is stable in power generation, the output current can be finely adjusted according to the adaptation period of a patient, the operation is simple and convenient, and electrotherapy requirements of various pathologies can be effectively met.

This invention discloses a method and device structure for improving the electrical transport properties of etched graphene quantum dots, belonging to the field of low-temperature transport testing technology. The method includes the following steps: fabricating etched graphene quantum dot devices; performing preliminary electrical transport characterization by cooling; and undergoing several cycles of "sample electrode grounding protection – heating to above 200K or room temperature – cooling again – electrical transport characterization" to improve the electrical transport properties of the device, enabling subsequent observation and manipulation of the quantum dot's fine charge stability map. The optimized method of this invention, through several heating and cooling thermal cycles, successfully adjusts the coulomb blocking region of the graphene quantum dots from hundreds of volts towards zero, facilitating the application of a gate voltage. Furthermore, the charge stability map of the two quantum dots is significantly optimized and improved, greatly increasing the yield of etched graphene quantum dot devices. In addition, the optimized method of this invention is simple to operate and has significant effects, making it suitable for widespread application.

The application provides a photovoltaic simulation device. Since two poles of a direct-current power supply module are used as two poles of the photovoltaic simulation device, and the direct-current power supply module is used to simulate the volt-ampere characteristic of a photovoltaic string in a first quadrant, the photovoltaic simulation device can simulate the output of the photovoltaic string. In addition, since the switch module is turned on when the negative pole potential of the direct-current power supply module is greater than the positive pole potential of the direct-current power supply module, and the first preset resistor and the first preset inductor are used to simulate the equivalent resistance and the equivalent inductance of the diode branch respectively, the series branch formed by the switch module, the first preset resistor and the first preset inductor can be turned on when the two poles of the direct-current power supply module appear negative pressure due to the failure of external devices, like each bypass diode in the photovoltaic string, so that the photovoltaic simulation device provided by the application makes the negative pressure characteristic of the photovoltaic simulation device closer to the photovoltaic string.

1. The name of the design product: intelligent inverter (8831). 2. The use of the design product: the design product is used for converting 12-volt or 24-volt direct current into 220-volt alternating current. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to a high voltage semiconductor device with an offset drain. The semiconductor device, such as, for example, a gate-all-around field effect transistor (GAAFET) device, is suitable for operability under higher operating voltage conditions (e.g., 1.2 volts to 3.3 volts). The semiconductor device includes: a first channel formed in a first plane of the semiconductor device; a second channel formed in a second plane, different from the first plane, of the semiconductor device; the drain electrode is formed around the first channel; the grid electrode is formed around the second channel; and the source electrode is formed around the second channel.

The present application belongs to the technical field of household photovoltaic, and particularly relates to a household photovoltaic fault diagnosis method and system, which comprises: collecting the volt-ampere characteristic curve data of a photovoltaic system and synchronous environmental irradiance; extracting at least one volt-ampere characteristic curve parameter, including short-circuit current, open-circuit voltage, maximum power or fill factor; according to the current irradiance, based on a preset dynamic health baseline, judging whether the system has a fault through a first preset rule. The first preset rule realizes fault diagnosis by obtaining a parameter expected health value and comparing it with an actual extracted value. The present application adopts a dynamic health baseline to adapt to environmental changes, combines an efficient parameter extraction algorithm with an intelligent fault judgment mechanism, significantly improves the diagnosis accuracy, reduces false positives and false negatives, and is suitable for low-cost, automated operation and maintenance of household photovoltaic systems.

The application discloses a pulse source for SiC MOSFET high-field stress reliability test, which comprises a main switch circuit, a high-voltage module, a driving circuit and an auxiliary power supply; the main switch circuit is connected with the high-voltage module and the driving circuit respectively, and the driving circuit is connected with the auxiliary power supply; the high-voltage module provides high voltage with sufficient power for the main switch circuit; the auxiliary power supply is used for providing various required voltages for the driving circuit; the driving circuit provides a gate driving signal with sufficient power for the main switch circuit; the main switch circuit bears high voltage output by the high-voltage module, performs switching action according to the gate driving signal output by the driving circuit, and outputs a specified high-voltage pulse waveform. The application can apply drain-source voltage with a voltage change rate as high as several thousand volts to SiC MOSFET high-field stress reliability test, and the voltage pulse waveform is controllable, and the application has the advantages of small size, high voltage resistance, simple driving, high power density and the like.

The application discloses a kind of soft magnetic high-precision measurement methods and systems without standard sample traceability, belong to electromagnetic physical material performance measuring instrument and measurement and control technical field.The application calibrates the constant of detection coil by standard volt-ampere method, constructs simulation integration circuit to establish the conversion channel of induced electromotive force to voltage;Input the shape topology classification and three-dimensional geometric characteristic size of the soft magnetic sample to be measured, call soft magnetic space leakage magnetic feedback mapping library to solve morphological mismatch compensation factor;Interchange magnetic field is applied to collect original integral voltage signal, lock the characteristic time window of saturation stage, fit zero-point drift function and deduct, calculate net magnetic flux change and then enter global traceable physical equation to obtain magnetic moment.The application does not need to rely on standard sample, effectively suppresses integral drift, corrects space truncation error, improves measurement precision and universality, realizes the traceable quantitative measurement of magnetic moment of soft magnetic material.

The application relates to a high-frequency plasma power supply, which realizes high-level response of the high-frequency plasma power supply through a voltage response board with a model of XILINX-AEC100 vehicle-level FPGA. Since the voltage applied in the high-frequency plasma power supply is higher than 400 volts, the voltage response board with the model of XILINX-AEC100 vehicle-level FPGA can realize normal work in a high-voltage environment. An isolating switch gives the voltage response board an operation action of an operator in the form of a level signal through an isolating effect, and in order to reduce the influence of voltage mutation of a voltage booster, a power selector can pre-set output electric energy power of the voltage response board. A power delay device fits large impedance between the voltage booster and a high-frequency electrotome, so as to prevent mutation of output electric power, and further improves the accuracy of the high-frequency plasma power supply in regulating electric energy supply.

This disclosure relates to a multiphase hybrid converter. A multiphase hybrid DC-DC converter using switching capacitor technology is described. The multiphase hybrid converter can reduce the volt-seconds across the converter's inductors, thereby reducing the inductor size. Furthermore, the multiphase hybrid converter can utilize the inductor as a current source to charge and discharge the flying capacitor, which can reduce the size of the intermediate capacitor and increase the solution density. Since the charging and discharging operations are performed by the inductor, the multiphase hybrid converter can eliminate capacitor-to-capacitor charge transfer. Therefore, the multiphase hybrid converter does not require high capacitance to achieve efficient operation, which further increases the solution density.

The invention discloses a zero common-mode voltage pulse width modulation method suitable for a dual three-phase permanent magnet synchronous motor. According to the combination relation between the common-mode voltage and the power device switch of the two-level voltage source inverter, the pulse duty ratio of each phase of the voltage source inverter is calculated based on a carrier pulse width modulation method, and the pulse duty ratio of each phase is adjusted in order according to the relation between the sum of the pulse duty ratios and 3, so that the sum of the adjusted duty ratios is 3. Then, on this basis, odd-even symmetrical PWM pulses are connected end to end and arranged for phase shifting based on the volt-second balance principle, so that even harmonics of common-mode voltage and phase current are eliminated. The method can effectively eliminate the common-mode voltage during operation of the permanent magnet synchronous motor, maintains the original steady state and dynamic performance, and has a good application prospect.

The utility model relates to the technical field of electrical measurement, and discloses a novel mutual inductor volt-ampere characteristic tester which comprises a tester body, a fixed base is arranged on the side surface of the tester body, and the upper side and the lower side of the two ends of the fixed base extend outwards and are provided with bolt insertion holes. And the outer surface of the tester body is provided with a screw hole corresponding to the size of the interior of the bolt insertion hole, and the limiting lantern ring of which the position can be adjusted is arranged, so that the tail end of a wire is clamped in wire clamping grooves formed in the upper side and the lower side of the limiting lantern ring in the middle of the winding column after the wire is wound; the head end and the tail end of the wire are fixed through the three limiting lantern rings, the head end and the tail end of the wire can be limited after the wire is wound, then the sealing baffles are inserted into the two corresponding limiting clamping grooves to seal the opening of the storage box, the arranged limiting lantern rings can prevent the two ends of the wire from loosening after the wire is wound, and a good fixing effect can be achieved.

The invention relates to the technical field of display chip driving control, in particular to a display chip process integration system, which comprises an environment sensing unit for acquiring dew point characteristic quantity, heat capacity entropy change rate and packaging deformation parameters through a distributed plasma resonance sensor and a thermopile array, and generating a three-dimensional phase change characteristic matrix by a deformation fusion processor; the disturbance analysis unit fuses the dynamic modulus attenuation parameters of the material, calculates the temperature gradient rotation and the moisture permeability divergence in parallel in the variable grid unit, and outputs an environment disturbance tensor; the coupling mapping unit generates a volt-ampere characteristic offset matrix and a quantum tunneling compensation factor; the driving compensation unit is used for separating a spinning channel by using a Follicle blocking filter and recombining a phase locking type quantization driving instruction; and the closed-loop execution unit activates the display panel and constructs a four-dimensional feedback tensor, and triggers a dynamic optimization mechanism of material dynamic modulus re-calibration and grid boundary resetting to realize driving precision stability control.

The circuits and methods of the present disclosure control the active off-time (high side switch on-time) to ensure the magnetization energy release and resonant capacitor energy release in an asymmetrical half-bridge (AHB) converter finish at the same time and all the stored energy is delivered to the output in each switching cycle. Multiple, parallel, techniques to control the high side switch on-time are illustrated. One is to track the volt-seconds applied during the storage cycle and allow the active release off-time to be limited to the same volt-seconds. A second option is to provide a high side switch on-time that is proportional to the on-time of the low side switch in that switching cycle. A third option is to provide a maximum high side switch on-time that can be programmed to ensure the high side on-time is equal to or smaller than half of the resonant period.

The disclosure includes apparatuses, methods, and systems for pre-decoder circuitry. An embodiment includes a memory array including a plurality of memory cells, decoder circuitry coupled to the array and comprising a first and second n-type transistor having a first and second gate, respectively, and pre-decoder circuitry to provide a bias condition for the first and second gate to provide a selection signal to one of the cells. The bias condition comprises a positive voltage for the first gate and a negative voltage for the second gate for a positive memory cell configuration, and zero volts for the first gate and the negative voltage for the second gate for a negative memory cell configuration. The pre-decoder circuitry comprises first pre-decoder circuitry to provide the positive voltage for the first gate and the zero volts for the second gate and second pre-decoder circuitry to provide the negative voltage for the second gate.

The invention relates to a model prediction control method and device for dynamically adjusting a prediction range. The method comprises the following steps: performing one-beat delay compensation on a motor system according to sampled data, and adjusting a prediction range of the one-beat delay compensation according to an actual switching frequency of the motor system at the current moment and a preset target switching frequency; calculating a reference voltage vector of the motor system based on a current dead-beat control principle, and performing space vector modulation on the reference voltage vector based on a volt-second balance principle to obtain a plurality of candidate voltage vector sequences; and selecting the candidate voltage vector sequence with the minimum harmonic current effective value as an optimal voltage vector sequence, and controlling the action of the motor system at the future moment according to the optimal voltage vector sequence. According to the method provided by the invention, the current harmonic is relatively small by adjusting the prediction range, limiting the switching frequency and screening the voltage vector sequence, so that the steady-state performance of the motor system is improved.

The application discloses a kind of round crystal processing with destatic device, belong to round crystal destatic technical field, including outer box and for being used to the processing mechanism of round crystal and carrying out destatic treatment, outer box is also provided with two for sending and sending out transfer mechanism and in-out mechanism of round crystal.The application is when round crystal enters the lower side of upper electrode plate, utilize high voltage power supply and electrify lower electrode sheet, form strong electric field, the electric field is excited by electrostatic induction on the back of round crystal and generates opposite polarity charge, generates uniform electrostatic adsorption force, firmly fixed on the surface of insulating sheet, realizes the lossless, clean fixing of round crystal;The application is set up air guide cabin and inner pole needle in the two sides of upper electrode plate, by applying several thousand volts high voltage generates strong electric field, ionize air and generate a large number of free electrons and positive ion, and form directional moving ion wind under the action of electric field, ion wind is directly blown to the surface of round crystal moving to the lower side of electrode plate, can rapidly, uniformly neutralize static charge on round crystal.

The application discloses a capacitor measurement circuit and a capacitor measurement method, and belongs to the field of semiconductors. The capacitor measurement circuit can accurately measure the junction capacitance of a semiconductor detector (a device to be measured) in real time and on line while applying thousands of volts of direct-current working voltage to the semiconductor detector by coupling an alternating-current test signal in a high-voltage bias loop and directly responding to charge changes by using a detection module, so that the measurement result truly reflects the capacitance characteristics of the device under the actual high-voltage working state. The entire circuit adopts a topology combining alternating-current injection and charge detection, effectively isolates the influence of high-voltage direct current on the precision detection circuit, guarantees high measurement precision and a signal-to-noise ratio, has good electrical safety, and is also compatible with the capacitor measurement demand under conventional low-voltage or zero-bias conditions, thereby improving the universality and application flexibility of the circuit.

The invention relates to the technical field of digital signal processing, and provides an MIP LED light color compensation driving method and device based on deep learning. The method comprises the following steps: acquiring real-time data of an MIP LED array, preprocessing the real-time data, and generating a multi-modal data tensor formed by standard data; performing decoupling processing on the data tensor by constructing a decoupling network to generate a decoupling component; performing volt-ampere characteristic modeling based on product data of the MIP LED array to generate volt-ampere characteristic parameters, and generating compensated driving voltage according to the decoupling component and the volt-ampere characteristic parameters; and performing fusion processing on the driving voltage and a driving signal in the real-time data to generate a control signal. Real-time data containing driving signals and the like are firstly obtained, brightness and other components are separated through decoupling processing, compensation driving voltage is generated in combination with hardware volt-ampere characteristics, finally, control signals are generated through fusion, and the stability, accuracy and uniformity of light color output of the MIP LED array are effectively improved.

The present disclosure provides a voltage presence indicator (VPI) circuit (100) for electrical safety application in electrical panel to indicate the presence of electrical potential of one or more electrical power input lines of an AC or DC circuit. The VPI circuit (100) includes plurality of voltage clipper circuits (VC1-VC5), bi-directional current limiter circuits (CL1-CL3), full bridge rectifier circuits (RC1-RC5), unbalance sensing circuits (SR1-SR2), signal conditioning circuits (S1-S2), comparator circuits (U1-U2), and flasher circuits (F1-F5). The flasher circuits (F1-F5) includes of plurality of solid state light emitting diodes (LEDs) disposed in a human viewable arrangement. The electrical circuitry of the VPI (100) converts electrical energy potential between the lines in the range of about 40 Volts to about 3000 volt into electrical inputs that drives the flasher circuit consisting of LEDs to produce light output.

A testing system calibration instrument (134) includes a plurality of device inputs (136), a plurality of signal processing units (138), a display device (139), a controller (140) and a housing (141) that unifies the components. The plurality of signal processing units (138) includes two or more of a millivolt / volt signal reader (138A) configured to produce a first calibration signal (146A) based on a millivolt / volt signal (136A) received from a first calibration sensor (144A) through one of the device inputs (136), a decoder (138B) configured to produce a second calibration signal (146B) based on an encoded signal (136B) received from a second calibration sensor (142B) through one of the device inputs (136), and a voltmeter (138C) configured to produce a third calibration signal (146C) based on an analog voltage signal (136C) received from a third calibration sensor (142C) through one of the device inputs (136). The controller (140) is configured to control the display device (139) to display information relating to the first calibration signal (146A), the second calibration signal (146B) and / or the third calibration signal (146C).

A power tool is provided including a motor having an axial length of smaller than or equal to 65 mm and an outer diameter of smaller than or equal to 63 mm. The electric motor is configured to produce a maximum power output of greater than or equal to 2800 watts when the battery pack coupled to the battery receiver has a nominal voltage output of smaller than or equal to 60 volts and a rated capacity of approximately 9 ampere-hours (A.h.). Further, the motor drives an output spindle so as to maintain an output rotational speed of greater than 3,500 rotations-per-minute (RPM) within a torque range of 30 inch-lbs to 45 inch-lbs and exhibit a drop in the output rotational speed that is less than or equal to approximately 11.5% as the torque increases from 30 inch-lbs to 45 inch-lbs.

An electrochemical apparatus includes a positive active material layer and a negative active material layer, where the positive active material layer includes a positive active material, and the negative active material layer includes a negative active material. The electrochemical apparatus satisfies the formulas: 0.5≤(U0−U) / (1.06−CB)≤1.5; and CB=(A′×B′×C′) / (A×B×C); by controlling the relationship among the charge cut-off voltage U volt of the electrochemical apparatus, the Full-charge Voltage U0 volt of the battery, and the ratio CB of the negative electrode discharge capacity per unit area to the positive electrode discharge capacity per unit area, 0.5≤(U0−U) / (1.06−CB)≤1.5, the high-temperature performance of the electrochemical apparatus can be improved while a lithium plating window can be improved, thereby improving kinetic performance of the battery.

1. The name of the design product: voltmeter (D5 and T3). 2. The use of the design product: the design product is used for connecting various DC interface power adapters, various USB chargers, mobile terminals and other electronic products to display real-time power-on parameters. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

The invention discloses an intelligent light volt-ampere protective fence, and relates to the technical field of protective fences, the intelligent light volt-ampere protective fence comprises a supporting rod, a connecting rod and a cross rod, the top of the supporting rod is provided with a camera, the outer wall of the camera is provided with a jacking assembly, and the jacking assembly comprises a first limiting block, a second limiting block and a sliding block; the inner wall of the first limiting block is movably provided with an ejector rod, the top of the ejector rod is provided with a second limiting block, the inner wall of the second limiting block is provided with a contact block, the outer wall of the supporting rod is movably sleeved with a lantern ring, and one end of the lantern ring is connected with the positioning plate. Through the arrangement of the jacking assembly, in the process that an electric push rod drives a positioning plate and a fixing block to move upwards to clean the surface of a connecting rod, the electric push rod is pushed to move upwards on a jacking rod, the jacking rod drives a second limiting block to move upwards, so that a contact block makes contact with the outer wall of the camera to clean the outer wall of the camera, and the practicability of the device is greatly improved.