3361 results about "Operating voltage" patented technology

The invention discloses an online aging state monitoring method and system for a silicon carbide MOSFET, and belongs to the technical field of semiconductor device monitoring, and the method specifically comprises the steps: collecting the working voltage, working current and junction temperature data of the silicon carbide MOSFET in real time, analyzing and processing the data through a data processing unit, and extracting the aging state characteristic parameters of the MOSFET; a dynamic aging state evaluation model fusing multi-source data and time sequence information is adopted to evaluate the aging state of the silicon carbide MOSFET, and a result is output to a display unit; according to the method, the aging state of the silicon carbide MOSFET is monitored, multi-level alarm strategies are set, different levels of alarm signals are triggered according to the aging state, meanwhile, feedback data are collected to optimize the state evaluation model, real-time and accurate monitoring of the aging state of the silicon carbide MOSFET is achieved, and the reliability and stability of a power electronic system are improved.

The invention relates to a cleaning operation and maintenance method, device and equipment of a photovoltaic module and a readable storage medium. The method comprises the following steps: acquiring a visible light image and an infrared image of a photovoltaic module, and acquiring working voltages and working currents of the photovoltaic module at a plurality of time points in a preset time period; constructing a current-voltage curve based on the working voltage and the working current, and determining a slope difference of the plurality of time points according to the current-voltage curve and a reference curve; identifying a dust accumulation area in the visible light image, and determining a dust shielding index based on the dust accumulation area; identifying a high-temperature area in the infrared image, and determining a hot spot index based on the high-temperature area; and determining a start-stop strategy of the photovoltaic cleaning robot according to the slope difference, the shielding index and the hot spot index of the multiple time points, and controlling the photovoltaic cleaning robot to clean the photovoltaic module according to the start-stop strategy. By adopting the method, the photovoltaic cleaning operation and maintenance efficiency can be improved.

The invention discloses a linearity closed-loop optimization method for a semiconductor gas sensor with adjustable voltage dynamic compensation, which relates to the technical field of gas detection and comprises the following steps: controlling the semiconductor gas sensor to start in a clean air environment, outputting an initial test voltage sequence through a voltage regulator, the method comprises the steps of collecting sensor reference resistance under different voltages, screening out initial working voltage with the minimum resistance fluctuation quantity, synchronously collecting initial environment temperature and humidity, and calibrating the sensor reference resistance based on preset temperature and resistance coefficients and humidity and resistance coefficients to obtain initial reference resistance. By dynamically adjusting the working voltage and combining real-time compensation on the environment temperature and humidity, the interference of environment factor fluctuation on the resistance characteristic of the sensitive material can be continuously counteracted, so that the linear relation between the output signal of the sensor and the target gas concentration is kept stable, the dynamic optimization of the linearity in a complex environment is realized, and the sensitivity of the sensor is improved. And more reliable basic data is provided for gas concentration detection in an industrial scene.

The invention relates to the technical field of power system monitoring and fault diagnosis, and particularly discloses a fault diagnosis system of an electrical variable measurement insulator detection device. The system comprises a synchronous acquisition module, a multi-physical field feature extraction module, a self-adaptive fault diagnosis engine and a feedback module. By synchronously acquiring voltage harmonic waves, leakage current and temperature data, extracting feature vectors of coupling electric-thermal influence and performing two-stage collaborative diagnosis by using a dynamic threshold value and a mahalanobis distance, high-sensitivity and self-adaptive accurate identification and early warning of an early latent fault of the insulator are realized. According to the system, by constructing a synchronous data acquisition module and a multi-physical field feature extraction module, two key influence factors, namely an operation voltage harmonic component and an environment temperature, are brought into a diagnosis system in a quantifiable feature form for the first time.

Lateral III-N devices such as AlGaN / GaN HEMTs can have structures which serve to improve performance and reduce current degradation. The III-N device can include a conductive substrate and a III-N material structure that includes a III-N buffer layer, a III-N channel layer and a III-N barrier layer where a compositional difference induces a 2DEG channel therein. The first portion is in ohmic contact with the 2DEG channel and the second portion extends over a top surface of the III-N barrier layer and is in direct contact with the top surface of the III-N barrier layer. The device further includes a drain-to-substrate pinch-off voltage and a maximum rated drain-to-source operating voltage which is greater than the drain-to-substrate pinch-off voltage, and the 2DEG channel is fully depleted of charge below the second portion of the drain electrode when the III-N device is biased at or above the maximum rated drain-to-source operating voltage.

The invention discloses a method and system for testing the electrical performance of a semiconductor chip, and the method comprises the steps: building a mapping relation between dielectric loss and loss frequency through obtaining the dielectric loss data, internal material characteristics and dynamic load power factors of the chip under each frequency band, recognizing a loss abnormal region, and analyzing the influence of the loss abnormal region on the performance of the chip; correcting test data by adopting a minimum mean square error algorithm, and optimizing the impedance of the power supply network and the dynamic switching characteristic of a functional module; calculating the breakdown voltage distribution of each layer in the chip, identifying a high-voltage risk region, optimizing the voltage distribution by using a gradient descent algorithm, and dynamically adjusting the working voltage and current; power factor fluctuation is analyzed through a sliding window algorithm, an abnormal area is identified, a power factor is optimized through a PID algorithm, and the working state and transient response of a chip in a dynamic load are improved. According to the method, the problems of nonlinearity of high-frequency dielectric loss, non-uniform breakdown voltage distribution and unstable power factor response under a dynamic load are solved, and comprehensive and accurate evaluation and optimization of chip performance are realized.

The invention relates to the technical field of chip encryption, in particular to an E-type effect amplifier electromagnetic heating method and system based on gallium nitride. The real-time resistance correction value is calculated by acquiring the real-time resistance data and the real-time temperature data and combining the working characteristic information and the ideal parameter information of the gallium nitride device, so that the temperature change of the gallium nitride device can be quickly responded, and then the resistance division subset and the temperature division subset are respectively acquired; a plurality of temperature-resistance correlation groups are obtained after permutation and combination, a data basis is provided for establishing a working voltage prediction model, then the working voltage prediction model is trained through historical data, and finally a real-time resistance correction value and a real-time temperature value are input into the corresponding working voltage prediction model to obtain a working voltage simulation value. And a circuit where the gallium nitride device is located is adjusted according to the working voltage analog value, so that the working voltage and the working current of the gallium nitride device are close to ideal values, and stable power output of the device is ensured.

The invention relates to the technical field of semiconductors, and provides a method for determining a working curve of a chip, a program product, a storage medium and electronic equipment. The method for determining the working curve of the chip comprises the steps that by running a test case for a target chip, the corresponding minimum working voltage of the target chip at a plurality of target frequency points is obtained, and the minimum working voltage is the minimum working voltage enabling the target chip to correctly execute the test case; and fitting a working curve of the target chip by using the plurality of target frequency points and the corresponding minimum working voltage, wherein the working curve is a curve representing the relationship between the frequency and the minimum working voltage. According to the method, the working curve of the target chip can be simply and efficiently determined, and the minimum working voltage of the target chip under the frequency can be obtained by randomly assigning one working frequency based on the working curve, so that great convenience is provided for obtaining the minimum working voltage of the target chip under different frequencies, and the working efficiency of the target chip is improved. And the method has good universality.

The present disclosure relates to the technical field of high-voltage direct-current power transmission, and provides a surge protection method and apparatus for a fully controlled valve in a controllable line-commuted converter, a computer device, a computer readable storage medium and a computer program product. The method comprises: monitoring a terminal voltage of a fully controlled valve in real time; when a wave turn-off voltage per cycle of a primary IGBT valve exceeds an operating voltage of a surge arrester, subtracting 1 from an available action count of the surge arrester of the primary IGBT valve, and when a wave turn-off voltage per cycle of a secondary IGBT valve exceeds an operating voltage of a surge arrester, subtracting 1 from an available action count of the surge arrester of the secondary IGBT valve; when the available action count of the surge arrester of the primary IGBT valve is less than a second preset count, or when the available action count of the surge arrester of the secondary IGBT valve is less than the second preset count, controlling a converter to return to a power grid line-commutation operation mode; and when the available action count of the surge arrester of the primary IGBT valve is greater than a third preset count, or when the available count of the surge arrester of the secondary IGBT valve is greater than the third preset count, controlling the converter to enter a controllable line-commutation operation mode.

A semiconductor die includes an on-die power switch and a target device. The on-die power switch includes a plurality of power input nodes, a power output node, and a switch circuit. The power input nodes receive a plurality of operation voltages from a plurality of different power sources, respectively. The power output node outputs a target operation voltage selected from the operation voltages. The switch circuit selectively couples one of the power input nodes to the power output node. The target device operates according to the target operation voltage supplied from the on-die power switch. The on-die power switch and the target device are separate circuit blocks of the semiconductor die.

To provide an in-situ electrochemical passivation and repair method for a solid-state lithium battery.SOLUTION: A sulfide-based solid-state battery is discharged to a specific lithiation degree according to a specific discharge mode under low current density, so that in-situ electrochemical passivation and / or repair of the battery are / is realized. Through the electrochemical reduction method, the interface of the sulfide-based solid-state battery can be passivated and stabilized, and the sulfide electrolyte is prevented from being continuously decomposed in the charging and discharging process, so that the sulfide solid-state electrolyte can be matched with an oxide positive electrode material with relatively high operating voltage; and an oxidation product generated by decomposition in the cycle process is converted into a lithium-rich reduction product with ion conductivity again, so that the activation and repair effects are achieved, and the battery has more excellent cycle stability.SELECTED DRAWING: Figure 13

The invention belongs to the technical field of board card testing, and particularly relates to a board card voltage and current measurement and insulation voltage resistance testing method and system, and the method comprises the steps: starting a testing cabinet of a board card testing system, carrying out the self-inspection, and setting system parameters; a power supply is loaded according to set system parameters, and a load mode is selected according to different product requirements to provide working voltage and current for the board card; after the load mode is confirmed, voltage and current measurement and insulation voltage resistance test are carried out on the board card in a probe contact mode, and test data are transmitted to the data processing and analyzing module in real time; and the data processing module judges according to preset upper and lower limit standards after receiving the measurement and test data, and stores the data and an evaluation result to the storage unit at the same time. Through unified control and data processing, voltage and current measurement and insulation voltage resistance testing of the board card are integrated in one system, automatic board card comprehensive testing is achieved, and the accuracy and efficiency of board card comprehensive testing are improved.

The sodium ion battery comprises a positive electrode and a negative electrode, an active material of the positive electrode comprises a polyanionic sodium storage material, an active material of the negative electrode is hard carbon, the ratio of the capacity of a slope region of the negative electrode to the capacity of the positive electrode is 1.1-1.2, and the working voltage of the negative electrode is 0.1-1.0 V. The NP ratio is limited, the working voltage of the negative electrode is limited in a slope region, sodium ions are mainly adsorbed on the surface, and sodium metallization in micropores is avoided; na < 3 > Ti < 2 > (PO4) < 3 > is added into a positive active material, a sodium source is provided for formation of an SEI film by utilizing a reversible decomposition reaction of Na < 3 > Ti < 2 > (PO4) < 3 > at 2.1 V or above, and a sodium pre-treatment process is not needed; the positive electrode and the negative electrode adopt gradient porosity design, so that the dynamic bottleneck of a high-load electrode is effectively solved.

The invention provides a clock input buffer and electronic equipment. The clock input buffer comprises a multi-protocol input circuit, a level conversion circuit, a step-down circuit and a clock buffer circuit. The multi-protocol input circuit is adjusted to different working modes through a control signal transmitted by the control unit so as to be compatible with various input protocols, the multi-protocol input circuit processes an input signal based on a target working mode, and the level conversion circuit performs level shifting on an output signal of the multi-protocol input circuit so as to realize multi-protocol conversion. The voltage reduction circuit is used for converting the output signal into a low-voltage domain signal so as to meet the working voltage requirement of the clock buffer circuit, and meanwhile, the voltage reduction circuit is used for reducing the power supply voltage so as to provide low-voltage power supply voltage for the clock buffer circuit; therefore, the clock buffer circuit can buffer high-speed signals in different input protocols and voltage ranges by using a low-voltage domain device, and the application scenarios of the clock input buffer are greatly expanded.

The invention relates to the technical field of electric leakage protection, and particularly discloses a full-working-condition self-adaptive electric leakage protection device, which comprises a data acquisition module used for acquiring electrical data of electrical equipment in real time, including load current, active power and operating voltage value, and calculating the real-time electric data of the electrical equipment by combining the real-time electrical data of the electrical equipment; the real-time load state influence coefficient of the electrical equipment can be obtained through calculation in a diversified data fusion mode, the data can reflect the real-time operation condition of the electrical equipment, namely, which operation state the electrical equipment is in a no-load state, a light-load state and a heavy-load state, and on this basis, the real-time load state influence coefficient of the electrical equipment can be obtained through calculation. According to the invention, the leakage current monitoring threshold is adjusted in real time based on the real-time operation condition of the electrical equipment, so that the situation of malfunction or leakage protection caused by significant difference of parameters such as current characteristics, harmonic content and insulation stress of a power grid under different loads can be avoided, and the accuracy of a leakage monitoring result is improved.

The invention provides a temperature rise test system, and relates to the field of heating characteristic testing of power equipment. The system comprises a power supply control system, an electric field regulation and control system, an environment simulation system, a discharge detection system, a three-dimensional temperature field monitoring system and a processing system. The power supply control system simulates equipment operation voltage; the electric field regulation and control system simulates a non-uniform electric field in the equipment; the environment simulation system simulates external environment conditions; the discharge detection system detects the partial discharge condition of the equipment under the simulation condition, obtains discharge parameters and transmits the discharge parameters to the processing system; the three-dimensional temperature field monitoring system monitors temperature distribution on the surface and in the equipment and transmits the temperature distribution to the processing system; and the processing system determines an association relationship between the partial discharge condition and the temperature rise based on the temperature distribution and the discharge parameters. Through cooperation of multiple systems, the influence of the external environment and internal electrical parameters on heating of the equipment is comprehensively simulated, and the heating behavior of the equipment under the actual working condition is reflected more truly, so that the accuracy of temperature rise simulation is improved.

A compensation circuit, including: a power management circuit and a switch circuit. The switch circuit is connected to a display panel and an operational amplifier circuit connected to the display panel. In case that a feedback voltage is greater than or equal to a target threshold, the switch circuit outputs a common voltage and an operating voltage to the operational amplifier circuit and stops outputting the common voltage to the display panel; and the operational amplifier circuit receives the common voltage and the operating voltage and outputs a compensation voltage to the display panel. In case that the feedback voltage is smaller than the target threshold, the switch circuit outputs the common voltage to the display panel and stops outputting the common voltage and the operating voltage to the operational amplifier circuit; and the operational amplifier circuit stops receiving the feedback voltage and stops outputting the compensation voltage.

The invention provides a chip power consumption measurement system and method.The chip power consumption measurement system comprises a test board, a power consumption collection module and a control module, the control module sends task instructions to a chip to be tested, and the task instructions comprise any one or more of a voltage instruction, a frequency instruction and an operation core instruction; when the chip to be tested executes a task instruction, the power consumption acquisition module acquires voltage information of each test resistor and transmits the voltage information to the control module; the control module determines the test power consumption of the to-be-tested chip according to the voltage information. According to the technical scheme, the task instruction can be sent to the to-be-tested chip, any one or more of the working frequency, the working voltage and the number of the running cores of the to-be-tested chip can be changed, different use scenes can be simulated, power consumption measurement of the to-be-tested chip can be completed in different scenes, and the test power consumption of the to-be-tested chip can be accurately and rapidly obtained.

The invention discloses a laser wireless energy transfer dynamic MPPT control method based on an RL-PSO hybrid algorithm and a reconfigurable array system, and aims to solve the problems of power oscillation and mismatch loss caused by light spot offset of a photovoltaic array under laser dynamic irradiation. According to the method, reinforcement learning (RL) and particle swarm optimization (PSO) are fused, dynamic parameters such as the light spot moving speed and irradiance are sensed in real time through the RL, the inertia weight and learning factors of the PSO are adjusted in a self-adaptive mode, and collaborative optimization of global search and local tracking is achieved. According to the system level, a reconfigurable photovoltaic array is designed, and according to data of a light spot position sensor, battery series-parallel topology is dynamically adjusted through a switch matrix, and current matching is optimized. According to the method, double-loop control is adopted, wherein an outer-layer RL decision module dynamically switches PSO working modes according to the environment, and an inner-layer PSO module optimizes the working voltage. The system efficiency in a dynamic scene can be improved by 15%-30%, mismatch loss is reduced by 40% or above, and the method is suitable for unsteady-state energy supply scenes such as unmanned aerial vehicles and mobile robots.

Disclosed is a reset semiconductor integrated circuit that outputs a reset signal in response to a power supply voltage of a monitoring target becoming lower than a predetermined level, the reset semiconductor integrated circuit including: a voltage detection circuit; an output stage including a CMOS circuit that generates and outputs a signal according to a detection result of the voltage detection circuit; a monitored voltage input terminal to which the power supply voltage of the monitoring target is input; a reference potential terminal to which a voltage as a reference potential of a circuit is applied; an external voltage terminal which is connected to a power supply voltage terminal of the output stage to allow a power supply voltage as an operation voltage of the output stage to be applied from outside; and an output terminal to output the signal generated by the output stage.

A light source module is provided and includes: a housing; a circuit board, received in the housing; and a light-emitting module, comprising at least two independent LED light beads that are integrally encapsulated and are configured to generate at least two colors of light correspondingly; wherein, each of the at least two independent LED light beads is electrically connected to the circuit board and has an operating voltage in a range of 6V-36V.

A semiconductor integrated circuit includes a first detection circuit and a second detection circuit. The first detection circuit is configured to assert a first signal until a first input voltage decreases from a first detection voltage to a first operating voltage limit, and to cause the first signal to enter an indeterminate state, upon occurrence of a condition in which the first input voltage decreases to be less than the first operating voltage limit. The second detection circuit is configured to assert a second signal until a second input voltage decreases from a second detection voltage to a second operating voltage limit, and to cause the second signal to enter an indeterminate state, upon occurrence of a condition in which the second input voltage decreases to be less than the second operating voltage limit.

According to the pixel unit, the driving circuit, the display panel, the display device and the driving method, the pixel unit comprises a first thin film transistor, a pixel electrode, a common electrode and a second thin film transistor, a source electrode of the second thin film transistor is electrically connected with the pixel electrode, and a drain electrode of the second thin film transistor is electrically connected with the common electrode, the grid electrode of the first thin film transistor is used for inputting a starting signal, and the source electrode of the first thin film transistor is used for inputting an overcharge voltage, so that the liquid crystal capacitor is charged, and the pixel electrode has the overcharge voltage; the grid electrode of the second thin film transistor is used for inputting a discharging signal to enable the liquid crystal capacitor to discharge and enable the pixel electrode to have working voltage, the overcharge voltage is larger than the working voltage, the voltage of the pixel electrode can exceed the working voltage when the starting signal is finished, the working voltage is achieved through the discharging process, and the charging speed of the liquid crystal capacitor is increased.

The invention provides a voltage-controlled oscillator and a phase-locked loop circuit, and relates to the technical field of integrated circuits. The voltage-controlled oscillator comprises a voltage-controlled circuit, a current copying circuit and an oscillating circuit, the voltage control circuit comprises a comparison unit, a switch unit and a voltage acquisition unit. A first input end of the comparison unit is used for receiving input control voltage, a second input end of the comparison unit is grounded through the voltage acquisition unit, an output end of the comparison unit is connected with a control end of the switch unit, one end of the switch unit is grounded through the voltage acquisition unit, and the other end of the switch unit is connected with an input end of the current copying circuit; the output end of the current copying circuit is connected with the input end of the oscillation circuit, and the output end of the oscillation circuit is used for outputting a control signal with target oscillation frequency. According to the voltage-controlled oscillator, the linearity of voltage control current is optimized, and meanwhile, the working voltage range of the voltage-controlled oscillator is expanded.

The utility model discloses an intelligent switch circuit and a switch device. The intelligent switch circuit comprises a switch module, a voltage transformation module, a key module, a main control module and a switch control module. The key module is used for responding to operation for triggering the key module and generating and outputting a switching signal and a first driving signal based on the working voltage, the main control module is used for generating and outputting a second driving signal based on the switching signal, and the switch control module is used for generating and outputting a control signal based on the first driving signal or the second driving signal. Through the switch control module, when the main control module is out of control and crashes, the first driving signal output by the key module can be selected to control the switch-on and switch-off of the switch module.

The invention provides a power management and power consumption control device and method of a continuous blood glucose detection circuit. Relates to the technical field of continuous blood glucose detection, solves the problems of power consumption control and switching in the prior art, and is characterized in that a power input end of a charge pump is connected with an anode of an external power supply; the control input end of the charge pump is connected with a mode control signal end; the power output end of the charge pump is connected with the first control end of the power switch device; the switching signal control end of the charge pump is connected with the second control end of the power switching device through the delayer; the output end of the power switch device is connected with the working voltage input end, and the working voltage output end is connected with the grounding capacitor; the power output end of the charge pump is connected with the input end of the power-on reset module, the power switch switching signal end of the power-on reset module is connected with the power switch switching signal end of the charge pump, and different working modes can be achieved, so that power consumption control is achieved.

The utility model discloses a lightning protection circuit and a power converter, and relates to the technical field of power electronics. According to the lightning protection circuit, for the condition that a capacitor parallel branch in a bus capacitor circuit comprises a first capacitor, a second capacitor and an inductor, and the first capacitor is connected with the inductor in series and then connected with the second capacitor in parallel, a lightning protection device is arranged to be connected with the inductor in parallel; in the lightning stroke process, the voltage at the two ends of the inductor exceeds the action voltage of the lightning protection device, so that the lightning protection device is broken down, and the voltage at the two ends of the inductor is clamped at the voltage drop after the lightning protection device is broken down, so that overlarge voltage cannot be formed on the second capacitor; therefore, the problem of voltage oscillation caused by current backflow at the lightning stroke moment can be weakened, the voltage stress borne by a corresponding power device in a post-stage circuit is reduced, and the corresponding power device is effectively protected.

The invention provides a constant-power driving method of a light source, a light source driver and an air conditioning system, and the constant-power driving method comprises the steps: determining an equivalent voltage corresponding to the power of the current light source based on the working current and working voltage of the current light source obtained in real time; performing differential amplification processing on the equivalent voltage and the expected voltage to generate a constant power modulation instruction of the light source; the expected voltage is a constant voltage simulated according to the rated power of the light source; driving power of the light source is generated based on a constant power modulation instruction of the light source and a feedback adjustment instruction, the driving power is amplified by using a preset power amplification coefficient, the amplified driving power is used for driving the light source to emit light, and the feedback adjustment instruction is generated based on sampling feedback of the driving power of the amplified light source. The constant-power driving of the light source is adopted, so that the service life, the precision and the response speed of the light source are ensured.

The invention belongs to the technical field of display driving, and particularly relates to a power supply circuit and a display panel, and the power supply circuit comprises a delay control module which is used for outputting a first control signal during power-on, and continuously outputting a second control signal after outputting the first control signal for a preset time length; the first power supply module is used for converting an output voltage of the external power supply into a first power supply voltage under the action of the first control signal; the second power supply module is used for converting the output voltage of the external power supply into second power supply voltage under the action of the second control signal; the power supply voltage is increased during power-on, the normal working voltage is recovered after power-on, all load modules in the display panel can work normally even if the power-on heavy load voltage drop exists, and therefore the problem of power-on abnormity caused by the power-on heavy load voltage drop is solved, and meanwhile the power-on reliability of the display panel is improved. And the problem that the device is damaged when the load works for a long time under a relatively high starting-up voltage is also avoided.

A light-emitting diode (LED) control unit includes: a pulse generator configured to generate a pulse signal; a T-filter configured to convert the pulse signal into a triangular wave signal; a first gate driver configured to receive the triangular wave signal and output a first gate control signal; a second gate driver configured to receive the first gate control signal and output a second gate control signal; a first switch configured to turn on a first LED string corresponding to a first color temperature based on the first gate control signal; a second switch configured to turn on a second LED string corresponding to a second color temperature based on the second gate control signal; and a power supply circuit configured to supply a power supply voltage to the pulse generator, the first gate driver, and the second gate driver by stepping down an operating voltage of the LED driver.