1019 results about "Pulsed power" patented technology

Some implementations include a system comprising at least one coiled tubing extending from a surface of a wellbore to a bottomhole assembly (BHA); a power cable to be housed either inside or outside the at least one coiled tubing and to electrically couple a power supply at the surface of the wellbore with the BHA. The BHA comprises at least one capacitor to store electrical power received from the power supply via the power cable housed in the at least one coiled tubing; and at least one electrode electrically coupled to the at least one capacitor to receive the stored electrical power from the at least one capacitor and to periodically emit pulsed power discharges into a subsurface formation to drill the wellbore based on the stored electrical power received from the at least one capacitor.

An apparatus, that is part of a drill string for drilling a wellbore in a subsurface formation, comprises a drill bit that includes at least one electrode coupled to a power source, the at least one electrode to periodically emit an electrical discharge based on electrical pulses received from the power source; and a first port to output a first type of drilling fluid having a different composition than a second type of drilling fluid to flow downhole for removal of cuttings, wherein the electrical discharge is to be transmitted through the first type of drilling fluid and through a rock of the subsurface formation.

Some implementations include a system having at least one thermally insulated coiled tubing and a bottom hole assembly (BHA) connected to the at least one thermally insulated coiled tubing. The BHA includes at least one capacitor, the at least one capacitor configured to store electrical power. The BHA also includes at least one electrode electrically coupled to the at least one capacitor, the at least one electrode configured to receive the stored electrical power from the at least one capacitor and to periodically emit pulsed power discharges into a subsurface formation.

The invention relates to the technical field of vacuum induction heating temperature control, and discloses a vacuum induction heating temperature closed-loop control system integrated with SCADA (supervisory control and data acquisition), which is characterized in that a functional material layer with preset Curie temperature is compounded on the surface of an induction coil, and the absolute value of phase difference is analyzed by collecting voltage and current signals of the coil in real time; according to the invention, through the synergistic effect of the electromagnetic impedance sudden change characteristic of the functional material layer and the phase difference detection mechanism, non-contact accurate control of the phase change critical temperature of the workpiece is realized; and meanwhile, due to the coupling application of the asymmetric micro-pulse waveform design and the dynamic adjustment strategy, the contradiction between thermodynamic response and electromagnetic interference in a vacuum environment is effectively balanced, and the control precision and stability of the system are remarkably improved.

The invention provides a sound wave generator soot blowing test method and system. The method comprises the steps that an experiment platform for simulating the working environment of a low-low-temperature economizer is built, and a test sample and sensing equipment are installed; setting power output parameters including a fixed power level and pulse power modulation parameter, a soot blowing frequency and phase control parameter, a time period and adaptive adjustment parameter, a sound wave frequency and an airflow velocity and vector control parameter; soot blowing operation is carried out, data are collected through sensing equipment, the soot coverage rate and particle information are obtained through an optical imaging sensor, and the pressure intensity generated by sound waves at the position where soot particles are located is obtained through an acoustic sensor array; calculating cleaning efficiency, and performing adjustment and iterative experiment on parameters according to the cleaning efficiency and data feedback; comprehensive optimization of the soot blowing process of the sound wave generator is achieved, the soot blowing effect of the low-low-temperature economizer is improved, then the overall operation efficiency of energy equipment is improved, the service life of the equipment is prolonged, and the requirements for environmental protection and energy saving are met.

The utility model discloses a mandarin fish domestication feeding device which comprises a feeding pipeline and a bait temporary storage tank arranged at the upper end of the feeding pipeline, a feeding hopper is arranged at the upper end of the bait temporary storage tank, and the feeding pipeline comprises a vertical pipe with the upper end in butt joint with the bait temporary storage tank and a horizontal discharging pipe in butt joint with the bottom of the vertical pipe. One end of the horizontal discharge pipe is connected with a high-pressure water source or air source; the vertical pipe is of a multi-section telescopic rod structure. A cathode ring piece and an anode ring piece are arranged at the two ends of the vertical pipe, and the cathode ring piece and the anode ring piece are connected with a pulse generator used for outputting pulse signals and a pulse power amplifier used for controlling output voltage through wires. The fish feeding device can achieve feeding at different depths, can feed live fish, dead fish and feed according to different proportions, is simple and convenient to operate, greatly reduces the workload of manual feeding, and can be widely applied to the field of bait feeding.

An enhanced lighting control system is provided that utilizes updated communications technology to provide a cost and resource efficient lighting control system that allows for a retrofit installation into existing lighting systems. The lighting control system utilizes single pair ethernet connection protocols, as well as a pulsed power source, to enable the efficiencies.

The invention provides a low-altitude logistics distribution method and system based on an electromagnetic launching unmanned aerial vehicle technology, and the method comprises the steps: installing a modular electromagnetic launching system in a designated region of a first logistics park; the unmanned aerial vehicle is connected with the modular electromagnetic emission system, and cargo loading and parameter calibration are carried out; dynamically planning a flight route of the unmanned aerial vehicle from the first logistics park to the second logistics park; the electromagnetic emission system is started to accelerate the unmanned aerial vehicle, and the pulse power modulation technology is utilized to control the output of specific pulse power in different stages, so that the unmanned aerial vehicle reaches a specified take-off speed within a preset distance range; the unmanned aerial vehicle autonomously flies along the flight route and autonomously performs obstacle avoidance and path correction, and the flight route or task sequence of the unmanned aerial vehicle is dynamically adjusted; and deploying a modular catapult stopping system in the second logistics park to complete stopping of the unmanned aerial vehicle. According to the invention, the acceleration efficiency can be improved to ensure that the unmanned aerial vehicle keeps a safe distance from the obstacle while keeping the distribution efficiency.

The invention provides an anti-radiation obtaining method and system of a strong current pulse measurement system, and belongs to the technical field of pulse power, and the method comprises the steps: analyzing the influence of each device parameter in the strong current pulse measurement system on the output characteristics of the strong current pulse measurement system, and recognizing a key device; inputting the irradiation sensitivity error distribution proportionality function of the key device into a deep convolutional neural network, and performing global collaborative optimization distribution on the irradiation sensitivity error distribution proportionality coefficient of the key device by taking the minimum comprehensive error of a strong electric pulse measurement system as a target function; and performing modular hierarchical redundancy setting on the key device by taking the consistency of the irradiation sensitivity error distribution proportionality coefficients of the actually and optimally distributed key device as a target, and performing irradiation hierarchical shielding according to the hierarchical redundancy setting of the key device. The radiation-proof requirement of the system can be met, and meanwhile, the radiation-proof setting cost and the size of the measurement system are remarkably reduced.

Some implementations include a system comprising at least one coiled tubing extending from a surface of a wellbore to a bottomhole assembly (BHA); a power cable to be housed either inside or outside the at least one coiled tubing and to electrically couple a power supply at the surface of the wellbore with the BHA. The BHA comprises at least one capacitor to store electrical power received from the power supply via the power cable housed in the at least one coiled tubing; and at least one electrode electrically coupled to the at least one capacitor to receive the stored electrical power from the at least one capacitor and to periodically emit pulsed power discharges into a subsurface formation to drill the wellbore based on the stored electrical power received from the at least one capacitor.

The invention discloses a high-entropy relaxation type lead-free perovskite ceramic and a preparation method thereof. The high-entropy relaxation type lead-free perovskite ceramic is a solid solution of Na < 0.2 > Bi < 0.2 > Ba < 0.2 > Sr < 0.2 > Ca < 0.2 >) TiO3 and (K < 0.5 > Na < 0.5 >) NbO3; the content of the (K0. 5Na0. 5) NbO3 accounts for 5 to 15 mol percent of the high-entropy relaxation type lead-free perovskite ceramic. By introducing (K0. 5Na0. 5) NbO3, energy band regulation and relaxation behavior adjustment are effectively realized, the breakdown electric field intensity is remarkably improved, the energy storage performance is improved, good stability is kept under the conditions of temperature, frequency and a circulating electric field, and the actual requirements of a pulse power capacitor on a high-performance and long-life energy storage dielectric material are met.

The invention discloses a metal-doped molybdenum disulfide composite super-smooth coating and a preparation method thereof, and belongs to the technical field of composite super-smooth coatings. The invention discloses a preparation method which comprises the following steps: sputtering metal palladium on a substrate by adopting a direct-current power supply to obtain a metal transition layer, depositing a molybdenum disulfide target on the metal transition layer by adopting a pulsed power supply, and preparing a metal-doped molybdenum disulfide composite super-smooth coating by adopting a double-target co-sputtering mode. The metal nanoparticles and the vertically oriented MoS2 sheet layer in the film are co-grown and have strong interaction to form the T-shaped array type Ag-MoS2 low dangling bond film, dangling bonds can be encapsulated to the maximum extent, the internal order degree of the film is improved, and the number of dangling bonds is reduced; meanwhile, the density and the oxidation resistance are ensured.

A pulse generating system includes a primary capacitor positioned along a primary side of a pulse generating circuit, and configured to store electrical energy, and a primary switch positioned along the primary side. The pulse generating system also includes a pulse transformer configured to step up voltage from the primary side to a secondary side of the pulse generating circuit; an output capacitor; and a secondary switch positioned in the secondary side, wherein the output capacitor is electrically coupled to the pulse transformer through the secondary switch.

Disclosed embodiments relate to a pulsed-power drilling system, in which a pulsed-power drill is conveyed downhole and operated via coiled tubing. The coiled tubing may be configured to simultaneously transmit power and drilling fluid downhole. For example, the coiled tubing may include a flexible hollow fluid tube configured to transport drilling fluid therein, and a flexible cable tube disposed within the fluid tube. The cable tube may have one or more cable disposed within protective tubing, protecting the cables from drilling fluid in the fluid tube. Methods of making and using such coiled tubing with pulsed-power drills are also disclosed.

The invention belongs to the technical field of machine manufacturing, and particularly relates to a metal part discharge machining precision control method and system.The method comprises the steps that discharge gap multi-dimensional physical parameters are sensed in real time in a multi-modal mode, high-dimensional feature extraction and data fusion are carried out, an intelligent discharge state prediction model is constructed, and on the basis of a prediction result, a metal part discharge machining precision control system is obtained. And processing parameters such as a pulse power supply, servo feeding and dielectric liquid are adjusted in an ultra-fast and self-adaptive mode, and iterative optimization of the processing process is achieved. By the adoption of the technical scheme, the machining precision, the surface quality and the consistency of the metal part can be remarkably improved, electrode loss is reduced, and the machining efficiency is improved.

The invention belongs to the pulse power semiconductor technology, and provides a drift step recovery diode with an anode short circuit structure, a cell of the drift step recovery diode comprises an anode structure, a voltage-withstanding layer structure and a cathode structure from top to bottom, and the anode structure is a mixed anode structure comprising a diode anode part, an NPN transistor part and an isolation and insulation part; the diode anode part, the NPN transistor part and the isolation and insulation part are jointly positioned on the voltage-withstanding layer structure; the anode part of the diode comprises a P-type low-doped layer, a P-type anode region and anode metal from bottom to top; the NPN transistor part comprises a P-type base region and an N-type anode region from bottom to top, and then the P-type base region and the N-type anode region form an NPN transistor together with an N-type drift region; the anode metal is located on the upper surfaces of the P-type anode region of the anode part of the diode, the NPN transistor part and the isolation and insulation part and makes contact with the P-type anode region and the N-type anode region at the same time to form a short circuit point, namely, anode short circuit, and better pulse output characteristics and lower process difficulty are achieved.

Disclosed is a method and standard module for amplifying pulsed power. The key point of the technical solution is as follows: a method for amplifying pulsed power is formed by means of the joint action of a LASER mode of a crystal medium, a carrier multiplication amplification mode of a semiconductor medium, and a plasma breakdown amplification mode of a gas medium. Electric power which is amplified is converted into optical power first, the optical power is amplified again, and the amplified optical power is converted into electric power again by a photoelectric conversion and amplification device. A gas switch is triggered based on a photoconductive switch to generate a timing-synchronized high-power electric pulse. The high-power electric pulse may be directly outputted or distributed in multiple channels to obtain multiple timing-synchronized trigger signals. In combination with pulse charge of a capacitor, multiple timing-synchronized high-power electric pulses are outputted.

In one embodiment, an apparatus includes a power source and a moveable charging arm coupled to the power source and comprising a charging plate for contact with an electric vehicle contact plate. The charging arm is operable to transmit direct current (DC) pulse power with testing performed between high voltage pulses directly from the charging plate to the electric vehicle contact plate to charge one or more batteries at the electric vehicle. A method for charging the electric vehicle is also disclosed herein.

The invention provides a low-temperature heat pump liquid impact prevention and supercooling degree strengthening control method based on dual-mode self-adaptive regulation and control, which comprises the following steps: monitoring the bottom temperature of a gas-liquid separator and the change rate of the temperature, and controlling the supercooling degree of the gas-liquid separator on the basis of the difference value between the temperature and a preset safety critical temperature and the difference value between the change rate and a preset minimum temperature rise rate, constructing a liquid impact risk index; based on the liquid impact risk index, the pulse power excitation intensity is calculated, the number of opened spraying channels is selected according to the pulse power excitation intensity, the pulse duty ratio of each channel is adjusted, the high-temperature gas-state refrigerant is controlled to be injected into the bottom of the gas-liquid separator, and the liquid-state refrigerant is driven to evaporate; generating a mode switching score, and generating a mode switching signal when the mode switching score exceeds a mode switching threshold value and the temperature of the gas-liquid separator reaches a safety lower limit; and according to the mode switching signal, a supercooling degree strengthening mode is switched, and the opening degree of an economizer branch electronic expansion valve is adjusted according to the deviation between the current supercooling degree and the target supercooling degree.

The invention belongs to the field of advanced metal plastic processing, and particularly relates to a difficult-to-deform metal ultra-thin strip rolling device and method.The device comprises an uncoiler, a high-strength rolling mill and a coiler which are sequentially arranged, and the inlet side and the outlet side of the high-strength rolling mill are each provided with a pair of equal-diameter rollers; the equal-diameter roller is composed of a copper conductive roller and a ceramic insulating roller, the copper conductive roller on the inlet side and the copper conductive roller on the outlet side are electrically connected to the positive electrode and the negative electrode of the pulse power source respectively, and a strip blank on the uncoiling machine sequentially penetrates through the equal-diameter roller on the inlet side, the high-strength rolling mill and the equal-diameter roller on the outlet side and then is wound on the coiling machine. And a working roll, which is in contact with the strip blank, on the high-strength rolling mill is an insulating ceramic working roll. The pulse current in the method can induce dynamic recrystallization, an ultra-fine grain or nanocrystalline structure is obtained, and the strength and plasticity matching of the product is superior to those of a traditional process. Meanwhile, long-time high-temperature oxidation can be avoided by adopting pulse current to heat the strip blank, and the surface is bright.

The invention discloses an inter-line power flow controller of a multi-terminal direct-current power distribution system. The inter-line power flow controller comprises an LLC resonant converter unit, a neutral-point balance control circuit and a power flow adjusting unit, the LLC resonant converter unit and the neutral-point equalization control circuit jointly form an input voltage stabilization part of the inter-line power flow controller, input sides VT + and VT-are connected to a high-voltage direct-current bus to receive electric energy, and output sides VTP + and VTP-are connected with two ends of capacitors C1 and C2 which are connected in series; two input end points of the neutral-point balance control circuit are respectively connected with output sides VTP + and VTP-of the LLC resonant converter unit through internal direct-current buses P and N, and an input neutral point of the neutral-point balance control circuit is connected with a connection point of the capacitor C1 and the capacitor C2 through an internal direct-current bus O. The beneficial effects of the invention are that the device has the advantages of modular design, low port expansion cost and high degree of freedom of adjustment, solves the problem of current control coupling between lines, and achieves the independent control of the currents of different lines and the free distribution of the frequency-doubled pulse power on the lines.

A pulsed-power driver with modular construction is presented. The pulsed-power driver includes a voltage adder assembly and a transmission line that extend along a driver axis from an upstream end to a downstream end. The voltage adder assembly has a modular construction and is disposed around the transmission line. The voltage adder assembly includes a number of stages axially distributed along the driver axis. The transmission line includes an inner conductor and an outer conductor. The outer conductor includes a modular segmented construction along the driver axis that includes a number of outer conductor segments corresponding to the number of stages. The pulsed-power driver further includes a plurality of stage insulators longitudinally interleaved between each pair of adjacent outer conductor segments, and the outer conductor segments of each pair are electrically connected to each other in series via a corresponding stage of the voltage adder assembly.

The technology disclosed relates to a pulsed power drilling system and methods for measuring properties of a mineral substrate by using at least one of the electrodes of the drill head of the pulsed power drilling system for measurement purposes. In particular, at least one of the electrodes of the drill head that is configured to be connected to a first electrical circuit for generating high voltage current pulses is also configured to be connected to a second circuit used for the purpose of measuring properties of the mineral substrate. At least one of the plurality of electrodes of the drill head that is configured to be used for passing a high voltage current pulse between two electrodes of the drill head via the mineral substrate for the purpose of breaking the mineral substrate may thereby also configured to function as a measurement electrode. The disclosed pulsed power drilling system and method may for example be applied in rock drilling, concrete processing, mineral processing, and continuous mining. The present disclosure further relates to a drill rig comprising a pulsed power drilling system and the use of a pulsed power drilling system.

An electric drive system includes an electric machine having a stator assembly and a rotor assembly. The stator assembly has a plurality of multi-phase stator windings, including a first stator winding and a second stator winding. A first inverter is adapted to feed the first stator winding. A second inverter is adapted to feed the second stator winding. The rotor assembly includes rotor windings having a single phase. A controller is configured to selectively command excitation of the rotor windings with a pulsed field current such that a direct-axis (d-axis) stator flux linkage is generated. A d-axis stator voltage is induced in the first stator winding and the second stator winding by the d-axis stator flux linkage. Pulsed power transfer is enabled through interaction of the d-axis stator voltage and respective d-axis winding currents in the first stator winding and the second stator winding.

The invention discloses an analog circuit breaker and interface integrated device for distribution automation test, which relates to the technical field of power test and comprises a device main body, an interface module and an analog circuit breaker module. The interface module and the analog circuit breaker module are integrated together, so that the types of debugging equipment are reduced, and the working efficiency is improved. The interface module is used as a connection transfer module, is composed of a first aviation socket with 26 pins and a second aviation socket with 10 pins, and is connected with a first interface socket and a second interface socket respectively, so that the uniformity of interfaces is realized; therefore, the existing power distribution terminal tester and the power distribution terminal can be conveniently and safely connected through the interface module provided by the invention. And a pulse power detection unit, a 48V voltage stabilization unit and a 24V voltage stabilization unit are designed in the analog circuit breaker module, so that 24V / 10A or 48V / 5A power verification can be supported, the debugging requirements of different voltage levels are met, and the special test requirements of the power distribution terminal are better met.

An enhanced lighting control system is provided that utilizes updated communications technology to provide a cost and resource efficient lighting control system that allows for a retrofit installation into existing lighting systems. The lighting control system utilizes single pair ethernet connection protocols, as well as a pulsed power source, to enable the efficiencies.

The invention belongs to the technical field of pulse power, and relates to a solid-state repetition-frequency pulse generator driven by multiple paths of synchronous optical fibers and a control method, the solid-state repetition-frequency pulse generator comprises a drive control circuit, the drive control circuit is connected with a Marx generator, and an AC-DC converter and a plurality of groups of IGBT switching circuits connected in series are arranged in the Marx generator; and the AC-DC converter is electrically connected with the group of IGBT switching circuits. In the topological structure, a plurality of IGBTs connected in series only need a gate driving voltage signal to drive the lowermost IGBT switching circuit, and other IGBT switching circuits are connected in series with one another, so that the IGBT switching circuits are sequentially conducted in an extremely short time, and synchronous driving is realized. Based on the circuit structure, a plurality of IGBT devices are modularly designed, and each module only needs one driving signal, so that the number of driving circuits is reduced, and the circuit structure is more compact.

The invention discloses a battery parameter identification method and system, belongs to the technical field of battery management, and solves the problems of high model dependency, weak anti-noise capability, difficulty in balancing real-time performance and precision, lack of aging adaptability and limited generalization capability of an existing method. The method comprises the steps of exciting a battery based on a mixed pulse power characteristic test or a dynamic working condition test, collecting dynamic test data of the battery, pre-constructing a dual-polarization model, identifying and analyzing the dynamic test data by the dual-polarization model, and outputting a parameter identification result. In the invention, the dual-polarization model comprises the ohmic internal resistance and the two RC parallel networks for representing electrochemical polarization and concentration polarization respectively, and the voltage change of the battery in the charging and discharging process can be reflected more accurately, so that the electrochemical process of the battery is described more accurately; the precision, robustness and full-life-cycle applicability of battery parameter identification are remarkably improved, and key technical support is provided for a high-safety and high-reliability battery management system.

The invention relates to a surface strengthening method for improving the rotary bending fatigue strength of shaft steel, which comprises the following steps: step 1, pretreatment: carrying out finish machining on the shaft steel, polishing the shaft steel with abrasive paper, then cleaning a sample with acetone and absolute ethyl alcohol solvents to remove oil stains and impurities on the surface, cleaning the sample with an ultrasonic cleaning machine, and air-drying the cleaned sample; and 2, electric pulse auxiliary ultrasonic surface rolling treatment is conducted, the sample is clamped on a lathe, currents are connected to the two ends of the sample through a pulse power source, technological parameters are set, lubricating oil is adopted for lubrication in the rolling process, the surface of the sample is machined for multiple times, and the surface-strengthened shaft steel sample is obtained. According to the method, a gradient plastic deformation layer, a hardened layer and a residual stress layer are introduced by adopting a mode of treating the surface of the shaft steel through electric pulse-assisted ultrasonic surface rolling, so that the expansion of cracks can be obviously inhibited, and the rotary bending fatigue strength of a sample can be effectively improved while the surface hardness and the residual stress are improved.

The invention provides a temperature error compensation method and system for a strong current pulse measurement system, and belongs to the technical field of pulse power, and the method comprises the steps: analyzing the influence of a device on the output comprehensive error of a to-be-compensated strong current pulse measurement system according to a device temperature coefficient function and interference weight ratio recognition, and recognizing a system key device; taking the temperature coefficient function of the key device as the input, taking the goal that the root mean square of the temperature coefficient in the system operation domain reaches the minimum, and adopting a first deep convolutional neural network to carry out optimal distribution of the temperature coefficient of the key device; according to the distributed optimal temperature coefficient of the key device, adjusting the actual temperature coefficient of the key device through a second deep convolutional neural network by using a temperature sensor and a programmable device; and based on the difference value between the actual temperature coefficient of the key device and the distributed optimal temperature coefficient of the key device, compensating the output overall temperature of the measurement system. According to the invention, effective compensation of the temperature coefficient of the full-temperature operation domain of the measurement system is realized.