1065 results about "Voltage generator" patented technology

The present invention relates to the technical field of circuit control, and relates to a direct-current high-voltage generator regulation and control method and system based on intelligent feedback. A fuzzy control logic operation is performed on an output current flux value and an input voltage fluctuation factor of a load experimental object, so as to obtain the disturbance amplitude of a voltage fluctuation state for a current flux change trend; if a step-up transformer can execute a PID control technology by adjusting a transformation ratio, PID real-time adjustment parameters are calculated, and a crossover mutation operation of individuals is performed on the basis of a fitness function, so as to generate a first boost regulation and control scheme; and if the step-up transformer cannot execute the PID control technology by adjusting the transformation ratio, a calibrated state feedback controller is constructed on the basis of a state variable of the current step-up transformer and an adjustment signal output amplitude, so as to generate a second boost regulation and control scheme. The present invention achieves intelligent feedback regulation and control by independently analyzing components of direct-current high-voltage generators, improving the stability and accuracy of outputting high-voltage direct current.

The invention discloses a partial discharge and breakdown combined test system and test method under wide temperature range and variable air pressure, which are suitable for evaluating the insulating properties of insulating materials, cables and power equipment under high and low temperature and different air pressure conditions. The system comprises a vacuum oven, a partial discharge and withstand voltage breakdown joint test module, an explosion-proof cable joint, a control module and a detection module, the vacuum oven can realize temperature regulation and control from-70 DEG C to + 200 DEG C and an air pressure environment of 10 <-3 > Pa, and the test module integrates a high voltage generator, a coaxial electrode and a partial discharge sensor. Partial discharge detection and breakdown voltage measurement can be completed in the same test environment. According to the test method, the electrical response characteristics of the insulating material under different working conditions are obtained through regulation and control of environment temperature and pressure, execution of a test process and data acquisition and analysis. The device is compact in structure and high in safety, and has the capabilities of joint testing, high-precision regulation and control and adaptability to complex environments.

The invention provides a device and method for testing the reliability of a power sensor, and the device comprises a magnetic field generation unit which is used for providing an alternating current for a Helmholtz coil through a power frequency current source, and generating a controllable magnetic field; the electric field generating unit is used for providing a high-voltage direct current or power frequency alternating current power supply for the parallel-plate capacitor through a high-voltage generator to generate a uniform electric field; the tested unit is used for providing a standard excitation signal through a standard source matched with the to-be-tested sensor, simulating an input condition of the to-be-tested sensor under an actual working condition and collecting output data of the to-be-tested sensor; and the control unit is used for setting test parameters, generating a control instruction according to the test parameters and generating a test result according to the output data. According to the device and the method, by simulating a strong magnetic field and a strong electric field environment and combining application of various measured parameters and an automatic control system, the reliability evaluation requirement of the sensor under the actual working condition is fully met.

The invention relates to a device and a method for preparing nanofiber core-spun yarn through batch coaxial electrostatic spinning. The device comprises a needleless dish-shaped spray head, an air blowing auxiliary device, a liquid supply device, an annular twisting device, a high-pressure generator, a negative-pressure air suction device, a winding device and an unwinding device. The core yarn penetrates through the axis of the needleless dish-shaped nozzle, the nanofiber generated by the needleless dish-shaped nozzle coaxially wraps the surface of the core yarn through the whole spinning device, and batch preparation can be achieved. The device is further provided with an air blowing auxiliary device and a negative pressure air suction device, under the air blowing effect of an air blowing nozzle and the adsorption effect of a negative pressure air suction shell, airflow force can be generated to promote jet flow to be further stretched in a straightened mode, under the common influence of electric field force and the airflow force, the jet flow is fully stretched, bending is reduced, and the service life of the jet flow is prolonged. Therefore, the nanofiber bundles can continuously cover the surface of the core yarn in a high-orientation state under the traction of the annular twisting device, and the continuous nanofiber core-spun yarn is formed.

The invention discloses a complex metal product internal defect analysis method and system based on radiographic inspection, a spiral track scanning path is generated through a workpiece three-dimensional model, a six-axis cooperative mechanical arm is utilized to drive a miniature X-ray source to move along the path, and + / -5 [mu] m positioning compensation is realized in combination with a piezoelectric ceramic driving mechanism. And the detector array module is matched to carry out multi-mode ray scanning and real-time data acquisition. Collected data are transmitted to a real-time data processing module through an LVDS differential interface, an FDK algorithm is executed by a JetsonTX2 embedded GPU to complete tomographic image reconstruction, a 3D-ResNet neural network model is loaded through a TensorRT inference engine to achieve intelligent defect recognition, and finally a detection report is generated and uploaded to an MES system. The system comprises a ray generation module, a multi-degree-of-freedom mechanical arm bearing module and the like, a high-voltage generator circuit comprises a ZVS resonance circuit, and a motion control module adopts an FPGA + ARM dual-core architecture.

The present invention discloses a pipeline welding processing device, which relates to the technical field of pipeline welding. The present invention includes an insulating base plate, a protective cover, a clamping part, a calibration rod and a calibration needle; the clamping part realizes stable clamping of pipelines with different diameters through a servo motor, a swing adjustment electric cylinder and clamping rollers, and accurately adjusts the pipeline axis height and the parallelism of the weld end face; the calibration needle cooperates with a high-voltage generator to judge the pipeline axis deviation through the arc distribution and assist in calibration. The device is easy to operate, can effectively improve the alignment accuracy and efficiency of pipeline welding, is applicable to various pipeline diameters, significantly reduces the difficulty of manual adjustment, ensures the welding quality, and is particularly suitable for high-precision pipeline welding scenarios.

The invention provides an X-ray high-voltage generator. The X-ray high-voltage generator comprises a resonance module; wherein the resonance module comprises a first inductor, a first capacitor and a second inductor which are connected in series at a primary winding of the high-voltage transformer; the first inductor and the second inductor form a common mode inductor, and the common mode inductor is an annular hollow inductor. According to the X-ray high-voltage generator provided by the invention, the problems of magnetic saturation risk, temperature sensitivity, magnetic core eddy current loss and the like of an existing resonance circuit are solved.

The invention belongs to the field of storage, and discloses a high-energy-efficiency mixed-precision charge domain in-storage computing architecture and a working method thereof. Comprising a single-slope analog-to-digital converter, a sparsity perception input alignment module, a multi-bit input accumulation module, a controller and an accumulation module, wherein the single-slope analog-to-digital converter consists of an index calculation array, a mantissa calculation array, a shared ramp voltage generator and a bidirectional counter. According to the invention, serial input binary coding based on capacitor voltage is suitable for floating point and integer multiply-accumulate operation with flexible bit width; according to the invention, a shared single-slope analog-to-digital converter (SS-ADC) is introduced to realize maximum index search and index difference calculation; according to the method, a sparsity perception calculation scheme is provided, low-importance input-weight pairs are filtered out through an adjustable threshold value, and invalid power consumption is reduced; according to the method, a multi-bit input accumulation method is further combined, and an ADC redundancy optimization quantization and normalization process is utilized, so that the overall energy efficiency is improved.

The invention discloses an electromagnetic compatibility fault prediction method for a pulse withstand voltage generator, and relates to the technical field of electromagnetic compatibility evaluation, and the method comprises the steps: collecting original signals of different circuit states of the pulse withstand voltage generator, extracting voltage ripple, current phase and magnetic field radiation frequency spectrum, and generating a time sequence monitoring data set; based on the time sequence monitoring data set, electromagnetic disturbance characteristics are extracted through deep analysis, a rule engine is built, and a fault probability and a fault type are output; triggering a plurality of suppression rules based on different fault types; after any suppression rule is executed, collecting the original signal again, and inputting the original signal into a pre-constructed risk assessment model to generate an interference suppression efficiency index; comparing the interference suppression efficiency index with a preset efficiency threshold value; if the interference suppression efficiency index is lower than the efficiency threshold value, generating a strategy compensation instruction and feeding the strategy compensation instruction back to the corresponding suppression step to iterate and adjust parameters; the electromagnetic interference suppression effect is improved.

A voltage generator including an LDO (low dropout) regulator that supplies a current to an internal voltage node of a sense amplification circuit as feedback control based on a voltage level of the internal voltage node; and a power switch circuit including a plurality of power switches each having one end connected to an external voltage and an opposite end connected to the internal voltage node, and that supplies the current to the internal voltage node as feed-forward control based on a known number of sense amplifiers to be activated. The voltage generator may efficiently supply current according to an operation mode of the sense amplification circuit.

The invention discloses a vehicle-mounted high-power power supply and distribution system and method, and the method comprises the steps: enabling one end of an engine to be provided with a transmission wheel train and a high-voltage generator during the running process of a vehicle, and enabling the output rotating speed of the engine to be improved to the rated rotating speed of the high-voltage generator through the transmission wheel train; high-voltage direct current output by the generator drives a high-voltage electric appliance to work after being subjected to voltage stabilization and filtering by the high-voltage distribution box; when an automobile is parked and a mains supply is used, alternating-current mains supply is inverted into direct-current power through the high-voltage distribution box to drive a high-voltage electric appliance to work. The defects that a traditional vehicle cannot run and cannot supply power in a high-power mode under the parking condition can be overcome, especially the technical problem of power supply under the parking condition is solved, software system adaptation development is carried out through the comprehensive technical scheme of a high-power high-voltage silicon generator, mains supply inversion, power supply filtering and the like in combination with post-stage power utilization characteristics, and the power supply efficiency is improved. And stable power supply of the air-conditioning system under running and parking conditions is ensured.

The invention relates to a passive wireless temperature sensor circuit, which comprises a transceiving antenna, an RF-DC rectifier circuit, a temperature sensing circuit and a backscatter circuit, the RF-DC rectifier circuit receives external radio frequency energy based on the transmit-receive antenna and then outputs direct current for power supply. The temperature sensing circuit comprises a complementary absolute temperature voltage generator and a ring oscillator; the complementary absolute temperature voltage generator comprises an MOS tube and generates CTAT voltage based on temperature characteristics of the MOS tube. The ring oscillator converts the CTAT voltage into an oscillation frequency signal of the ring oscillator and then outputs a square wave frequency signal with a negative temperature coefficient; the backscattering circuit backscatters the square wave frequency signal through the transceiving antenna; the CTAT key generation circuit built by the MOS tube generates CTAT voltage, a temperature frequency conversion chain is built through the CTAT voltage and the ring oscillator, temperature information is converted into frequency information of the oscillator, the power consumption of the temperature sensing circuit can be effectively reduced, and meanwhile the voltage coefficient of the CTAT voltage is increased by combining the temperature characteristic of the MOS tube.

A display device includes a display panel including a sub-pixel, a gate driver which provides a gate signal to the sub-pixel, a data driver which provides a data voltage to the sub-pixel, a driving voltage generator which provides a gamma reference voltage including a black data voltage to the data driver, and a driving controller which determines an offset voltage of the black data voltage based on at least one selected from a driving frequency, a dimming level, and a temperature.

The invention discloses an external mobile synchronous grid connection platform based on a low-voltage generator car, and relates to the technical field of synchronous grid connection, the external mobile synchronous grid connection platform comprises a box body and an intelligent control system, and an adjustable synchronous controller, a double-break vacuum circuit breaker and a multi-system interface panel are arranged in the box body; the intelligent control system comprises a voltage phase detection unit, a frequency tracking unit, a phase compensation unit, a grid-connected switch execution unit and a man-machine interaction unit. Through the application of the low-voltage generator car, the synchronous grid-connected platform and the non-inductive access exit, the maintenance, construction, switching and other work of a power system can be realized, the non-inductive operation of a user load end is realized, the power failure work of a user end is reduced to a great extent, the non-inductive access exit of the low-voltage generator car is realized, and the safety of the power system is improved. And through automatic control and quick response equipment, zero-sensing switching of a power supply system can be realized.

The invention discloses a medium-voltage generator car power protection method and system based on power distribution automation graph model positioning access point, and the method comprises the steps: obtaining power distribution network automation graph model data, carrying out the processing of the data, obtaining the processed data, and building a power distribution network automation graph model database according to the processed data, acquiring real-time operation data and historical load data from the power distribution network automation graph model database, performing feature extraction on the real-time operation data and the historical load data, analyzing the extracted features, and predicting the load of each region of the power distribution network in a future time period by adopting a trained load prediction model to obtain a prediction result; and searching and determining a plurality of candidate access points in the power distribution network automation graph model, screening out an optimal access point from the plurality of candidate access points, and sending the information of the optimal access point to the medium-voltage power generation vehicle access control module. According to the method, the medium-voltage generator car can be quickly, accurately and efficiently connected to the power distribution network for power protection, and the reliability and stability of power supply are improved.

The invention provides a compact high-voltage generator with excellent heat dissipation performance, belongs to the technical field of high-voltage generators, and solves the technical problems that an existing generator is complex in structure, poor in heat dissipation performance and the like. Comprising a water-cooled generator shell, a rear end cover piece is arranged at the rear end of the water-cooled generator shell, a linkage heat dissipation end assembly is arranged at the front end of the water-cooled generator shell, a stator assembly is arranged between the rear end cover piece and the linkage heat dissipation end assembly, and a rotor shaft is rotationally arranged in the stator assembly; a rotor shaft is arranged in the water-cooled generator shell, the two ends of the rotor shaft are rotationally arranged between the rear end cover piece and the linkage heat dissipation end assembly respectively, a plurality of rotor assemblies are arranged on the rotor shaft and distributed in the stator assembly, an electric control box is arranged above the water-cooled generator shell, and a mounting base is arranged below the water-cooled generator shell. The heat dissipation device is provided with a water-cooling main heat dissipation system and an air-cooling auxiliary heat dissipation system, and the heat dissipation effect is good; and deep integration and modular structure are realized, the size is obviously reduced, the operation is stable, and the maintenance cost is reduced.

The invention discloses a portable lightning arrester performance detection device and a use method thereof, and relates to the field of lightning arrester detection. The portable lightning arrester performance detection device comprises a direct-current high-voltage generator and a box cover arranged on the direct-current high-voltage generator, a flat cable is arranged between the direct-current high-voltage generator and the box cover, two test main lines are embedded in the flat cable, a placement cavity is formed in the box cover, and the test main lines are arranged in the placement cavity. And a plurality of contact type power connection seats are arranged in the placement cavity in parallel based on the test main line, and each contact type power connection seat can be used for placing the lightning arrester main body and is electrically connected with the lightning arrester main body in a contact manner. According to the portable lightning arrester performance detection device, the multi-station parallel contact type power connection seat is arranged in the placement cavity of the box cover, the test branch line is connected with the test main line, a plurality of lightning arrester main bodies can be placed at the same time, a single detection loop is independently controlled through the change-over switch, and batch detection and station switching are achieved.

Provided is a display driving circuit, including at least one processor configured to generate a first gamma code corresponding to a first mode among a plurality of modes, a gamma voltage generator configured to generate a plurality of gamma voltages with respect to the first mode, a data driver configured to generate data signal corresponding to the first gamma code based on the first gamma code and the plurality of gamma voltages, and generate a first level data corresponding to a minimum gamma voltage among the plurality of gamma voltages based on the data signal, and a gamma control logic circuit configured to generate a gamma voltage control signal for controlling the gamma voltage generator based on the first level data.

A down-sampling function folds the thermal noise into a lower frequency band. A capacitor samples a voltage during a period of bus inactivity and supplies the sampled voltage to an input of operational amplifier in a loop filter of a phase-locked loop when the bus is active. The sampling frequency determines the reduction in thermal noise that can be achieved. The PLL generates a clock signal for a bus. A voltage generator charges the capacitor through a transistor when the bus is inactive. The transistor turns on responsive to the bus being inactive to allow the capacitor to charge and the transistor turns off responsive to the bus being active to isolate the capacitor and operational amplifier from the voltage generator. When the bus is active, the voltage across the capacitor is supplied to the operational amplifier.

A data storage device may include an outer fine actuator group, an inner fine actuator group, and control circuitry comprising: a slew control voltage generator, a first switch, and a second switch. The control circuitry is configured to: generate a control signal; control the first switch to apply the control signal to a first fine actuator group for a first duration; control the first switch to apply the control signal to a second fine actuator group for a second duration, wherein each of the first and the second fine actuator groups comprises one of the inner or the outer fine actuator groups, and wherein the first and second fine actuator group are different; concurrently discharge the first fine actuator group during the second duration, based at least in part on controlling the second switch to couple the first fine actuator group to the slew control voltage generator.

Embodiments of the disclosure provide a structure and method to ground a reference voltage generator based on a detected supply voltage. A circuit structure according to the disclosure includes a pass gate. The pass gate includes a pair of transistors each coupled to an input signal. One of the pair of transistors of the pass gate includes a gate coupled to a static reference voltage. An inverter couples an output from the pass gate to a device node. The inverter includes a drain terminal, a gate terminal, and a back-gate terminal coupled to ground.

The invention belongs to the technical field of porcelain insulator zero-value detection, and discloses a porcelain insulator zero-value detection device and a detection method thereof, and the device is used for portable rapid zero-value detection or zero-value detection for early defective insulators / partially degraded insulators. The portable rapid zero value detection device comprises an impulse voltage generator, an insulator unit and a measurement module, the output end of the impulse voltage generator is connected with the input end of the insulator unit, and the output end of the insulator unit is connected with the measurement module; the device for detecting the zero value of the early defective insulator / the partially degraded insulator comprises an impulse voltage generator, a Rogowski coil, an integrator and an oscilloscope, the Rogowski coil is arranged on a wire to be detected in a surrounding mode, the output end of the Rogowski coil is connected into the integrator, and the output end of the integrator is connected with the oscilloscope. The invention provides a porcelain insulator zero value detection method taking a high-frequency component as a criterion, and the method can achieve the quick and reliable detection of whether the value of the insulator is zero or not.

Provided is an electronic device comprising a display panel in which a first display region and a second display region are defined and which has a first pixel and a second pixel, a first temperature sensor which measures a first temperature of the first display region, a second temperature sensor which measures a second temperature of the second display region, a voltage generator which generates a first initialization voltage and a second initialization voltage, and a driving controller. The driving controller may generate a voltage control signal on the basis of the first temperature and the second temperature, and the voltage generator may provide, on the basis of the voltage control signal, the first initialization voltage to the first pixel and the second initialization voltage to the second pixel.

The present disclosure relates to a display device. The display device includes: a first pixel including a first organic light-emitting diode; an initialization voltage generator for generating a first initialization voltage to be supplied to an anode of the first organic light-emitting diode; and a timing controller including a first lookup table recording a plurality of first initialization voltage values ​​corresponding to a plurality of maximum brightnesses, the timing controller being configured to determine a value of the first initialization voltage based on received information related to a target maximum brightness and the first lookup table.

The present invention discloses a high-precision meteorological sensor, which relates to the technical field of meteorology and includes a rain cover, a fixed disk, a rain shield, an ultrasonic reflector, a hollow support column, an upper housing, a lower housing, a louver, a power supply fixing part, a base, a power supply board, a high-voltage generator, an ion blower, an air condition sensor, an acquisition main board, an ultrasonic sensor, a piezoelectric sensor, etc.; only two of the multiple groups of ion blowers are working at the same time, so it has multiple air circulation modes, which is beneficial to adapt to different seasons and weather; the detection head integrates temperature, humidity and air pressure sensing, and cooperates with the breathable hollow air-permeable head and combines with the air circulation to achieve accurate detection; when the hollow air-permeable head adopts a special-shaped curved surface structure, it has good aerodynamic characteristics, and combined with the air circulation, it will increase the collision area of the air flow and achieve high-precision detection.

Provided is a source driver including: a gamma voltage generator configured to: output a plurality of first gamma voltages during a first time period, and output a second gamma voltage to a plurality of source lines during a second time period different from the first time period, wherein the gamma voltage generator is connected to the plurality of source lines during the second time period; and a plurality of amplifier areas connected to the plurality of source lines, wherein the plurality of amplifier areas are configured to: output a plurality of data signals based on the plurality of first gamma voltages during the first time period, and be disabled during the second time period.

A charge pump control circuit, comprising an internal reference voltage generator configured to generate a programmable reference voltage ramp, and a control circuit coupled to the internal reference voltage generator. The control circuit configured to control current of a charge pump circuit driving a load by controlling a duty cycle of a transfer phase of the charge pump circuit during a gain-up stage according to a first comparison between the programmable reference voltage ramp and an output voltage across an output capacitor of the charge pump circuit, and a second comparison between a fly capacitor reference voltage and a fly capacitor voltage of a fly capacitor of the charge pump circuit.

A display device includes a display panel including a pixel, a data driver which provides a data voltage to the pixel, a power voltage generator which provides a first initialization voltage and a first power voltage to the pixel, and a driving controller which controls the data driver and the power voltage generator, and the driving controller determines a difference between the first initialization voltage and the first power voltage based on an input luminance.

The invention provides an inverter drive circuit based on double closed-loop error compensation and a high-voltage generator, and the inverter drive circuit comprises a first operational amplifier circuit which is connected with a voltage doubling rectifying circuit to form a voltage feedback loop so as to obtain a kV feedback signal, and is used for carrying out the operation of a reference voltage signal and the kV feedback signal, and then outputting a first error compensation signal. The second operational amplifier circuit is connected with the resonant converter through the resonant current sampling circuit to form a resonant current feedback loop so as to obtain a resonant current feedback signal, and is used for calculating the first error compensation signal and the resonant current feedback signal and then outputting a second error compensation signal; the drive control circuit is used for outputting a PFM modulation signal to the drive circuit according to the second error compensation signal. The drive circuit is used for carrying out signal processing on the PFM modulation signal and outputting a PFM drive signal to the resonant converter. Accurate error compensation is carried out on LCC topology driving through a voltage and current double-closed-loop feedback loop, and the effect of improving the transient response and efficiency of the X-ray power supply system is achieved.

Disclosed herein are a method of controlling a bipolar high-voltage generator and an X-ray system. The bipolar high-voltage generator is connected to a load for supplying a cathode voltage and an anode voltage to the load. The bipolar high-voltage generator includes a first transformer and a second transformer. The first transformer is provided in an output circuit of the anode voltage, and the second transformer is provided in an output circuit of the cathode voltage. The method of controlling includes: obtaining a target voltage difference of the bipolar high-voltage generator, wherein the target voltage difference is within a preset range; and adjusting a working state of at least one of the first transformer and the second transformer based on the target voltage difference. The target voltage difference is defined as a difference between an absolute value of a target anode voltage and an absolute value of a target cathode voltage output from the bipolar high-voltage generator.