77 results about "Pulsed power" patented technology

A high-frequency power supply device includes a first power supply that outputs a high-frequency AC voltage having a first frequency, a second power supply that outputs a DC pulse voltage including one or more continuous pulse waveforms, a matching box that receives the high-frequency AC voltage, performs impedance matching such that impedance viewed from the first power supply becomes constant, and outputs the high-frequency AC voltage, a filter that receives the DC pulse voltage, filters the DC pulse voltage, and outputs the DC pulse voltage to a pulse-power input terminal of a load, and an IMD suppression circuit that includes a first inductor having predetermined inductance provided between the matching box and an AC-power input terminal of the load, receives the high-frequency AC voltage, allows the input high-frequency AC voltage to pass through the first inductor, and outputs the high-frequency AC voltage to the AC-power input terminal of the load.

The application relates to a negative ion water hydrate conversion air negative ion device which comprises an insulating water containing volume and a positive and negative electrode device arranged in the insulating water containing volume, the positive and negative electrode device is connected with a negative pulse power source through a wire, a positive electrode layer in the positive and negative electrode device is wrapped with an insulating layer, a water passing electric field gap serving as a circulating channel of water is arranged between the positive electrode layer and a negative electrode layer in the positive and negative electrode device, the water passing electric field gap is connected with an inlet channel of a circulating pump through an insulating pipeline, the circulating pump is made of an insulating material or is in an electrically conductive isolated state with zero potential of the ground, an outlet of the circulating pump is connected with an atomization device through an insulating pipeline to atomize negative ion water into atomized negative ion water, and the atomized negative ion water is gasified into air negative ions through an air dehumidifier drying method or a negative pressure volume cavity negative pressure mode. The application does not generate ozone, the ecological grade air negative ion concentration is high, the migration distance is far, and the application is suitable for a wide range of scenes.

FIELD: protective coatings.SUBSTANCE: method for forming a protective oxide-ceramic coating on the surface of products made of valve metals and alloys by the plasma electrolytic oxidation method involves immersing the product as an electrode together with a counter electrode in a bath filled with an aqueous alkaline electrolyte, and supplying rectangular pulses of anodic and cathodic voltage to the electrodes using a pulsed power source. Anode and cathode voltage pulses are supplied with a current-free pause between them, the value of which is 4.8 times the duration of the anode pulse. The amplitude values of the cathode voltage pulses range from 85 to 149 V with a pulse repetition frequency from 1000 Hz to 4000 Hz, while the current pulse repetition frequency is additionally regulated.EFFECT: obtaining oxide-ceramic coatings with specified properties under reduced energy conditions, with lower values of cathode voltage.1 cl, 2 ex

The application discloses an online lithium battery state of charge estimation method based on state estimation, obtains an OCV-SOC characteristic curve by a small current discharge method and a hybrid pulse power performance test method through a second-order RC equivalent circuit model, and then obtains an optimized OCV-SOC curve through a differential evolution algorithm. Parameters are identified online through an adaptive fading factor recursive least square method (AFRLS), the parameters of an unscented Kalman filter observer are updated, a timing model gated recurrent unit network (GRU) adaptive interference noise is introduced, online SOC prediction of a lithium battery is realized as output, finally, the predicted SOC is combined with the OCV-SOC curve to predict the terminal voltage, and the predicted terminal voltage is compared with the measured terminal voltage to form feedback and update; the application can adapt to various working conditions, has low computational complexity, high accuracy, and the accuracy is significantly improved compared with a traditional extended Kalman model and an unscented Kalman model.

The application relates to the technical field of pulse power, in particular to a magnetic core auxiliary coaxial pre-ionization three-electrode gas switch, which comprises a gas switch main body, the gas switch main body comprises a low-voltage electrode, a high-voltage electrode and a trigger electrode which are coaxially arranged in an insulating support; the trigger electrode and the low-voltage electrode form a pre-ionization gap, and the trigger electrode and the high-voltage electrode form a main gap; the trigger electrode is used for receiving a trigger pulse voltage; when the trigger pulse makes the bottom of the trigger electrode produce strong field distortion, the pre-ionization gap is rapidly broken down, the main gap is pre-ionized by ultraviolet, and the gas switch main gap is rapidly broken down after the trigger pulse reaches the low-voltage electrode. The switch can improve the stability of the main gap breakdown.

The present invention provides an electrical discharge machining (EDM) pulse power supply and machining method based on a three-level Cuk circuit, comprising: a three-level Cuk main power circuit, a DC voltage source, an FPGA control circuit, and a drive circuit. The three-level Cuk main power circuit is used to connect the EDM gap to achieve discharge machining. The DC voltage source outputs an adjustable DC voltage to power the three-level Cuk main power circuit. The FPGA control circuit generates a PWM signal that enters the drive circuit. The drive circuit processes the PWM signal to generate a drive signal to control the on / off state of the switching transistors in the three-level Cuk main power circuit. This invention effectively increases the switching frequency of the system, significantly reduces voltage and current ripple, and lowers the selection requirements for switching transistors, filter inductors, and output filter capacitors. Simultaneously, it can meet the requirements of high and low voltage composite output for EDM pulse power supplies, efficiently and reliably fulfilling the requirements for EDM pulse power supplies.

The application relates to the technical field of flight pod control, and discloses a flight pod pulse power source adaptive charging method based on a heterogeneous architecture, which comprises the following steps: synchronously collecting 6-way sensor data and performing parallel filtering; performing main-backup redundancy weighted fusion and fault determination on key sensors; generating LLC PWM driving and performing feedback voltage DMA sampling and 3-frame anti-shake robust estimation; performing MLP calibration on pretreated sensor data to quantize a 16-bit fixed-point model, realize batch production error self-compensation, and replace original data with the calibrated result; selecting parameter fine-tuning actions according to environmental states and energy states, updating a state-action value table according to a reward function and an epsilon-greedy strategy, and realizing 5-10 rounds of rapid convergence to near-optimal parameters. The application provides a charging control method which has high-speed processing capability, strong robustness and self-adaptive capability, so as to solve the bottleneck problem of existing MCU and DSP schemes in the application of high-power microwave flight pods.

This application discloses a pulse power amplifier modulation circuit, relating to the field of radar technology, which includes a pulse power amplifier modulation circuit applied in radar. The circuit comprises a PWM signal generation module, an isolation module, and a differential voltage regulation module connected in sequence. The differential voltage regulation module is also connected to a radar power amplifier module. The differential voltage regulation module includes a first adjustable resistor, a second adjustable resistor, and a push-pull circuit unit. One end of the first adjustable resistor is connected to the radar power supply, and the other end is connected to the isolation module. One end of the second adjustable resistor is connected to the isolation module, and the other end is grounded. The other end of the first adjustable resistor is also connected to the input terminal of the push-pull circuit unit, and the output terminal of the push-pull circuit unit is connected to the radar power amplifier module. This application improves the driving capability and level control accuracy of the PWM signal and effectively avoids the risk of PMOS burnout caused by excessive VGS voltage difference.

This invention discloses an antibacterial and antistatic semiconductor coating, its preparation method, and its application, belonging to the field of aluminum alloy surface treatment technology. A bipolar pulsed power supply is used, with the aluminum alloy as the cathode and a graphite plate as the anode. A water / organic mixture solution is used as the electrolyte system. Cathode plasma electrodeposition is performed in constant voltage mode to obtain a semiconductor coating on the aluminum alloy surface. The organic compound is at least one selected from glycerol, ethylene glycol, sorbitol, ethanol, and triethanolamine. The electrolyte system also includes a water-soluble zinc source, a highly selective aluminum ion complexing agent, a doping modifier, a conductive salt, and a pH adjuster. The semiconductor coating provided by this invention exhibits long-term stable antibacterial and antistatic properties. It is mainly composed of inorganic ZnO functional components with both antibacterial and conductive properties. The antistatic properties of the coating are regulated by introducing dopant ions, ensuring the long-term stable antibacterial and antistatic functions of the coating.

This invention discloses a high-voltage, high-current optically controlled solid-state switch assembly based on dual isolation, relating to particle accelerators, pulsed power, and power electronics. It includes: a synchronous triggering system, isolated laser driving units, a series group of laser diodes, and optically controlled multi-gate thyristors. An external trigger signal first enters the synchronous triggering system, converting the initial external trigger signal into multiple nanosecond-level synchronous weak light trigger signals. These weak light trigger signals are losslessly transmitted to each isolated laser driving unit. Upon receiving the weak light trigger signal, the isolated laser driving unit amplifies the energy through an internal high-speed power semiconductor switch, outputting an electrical pulse. The electrical pulse is transmitted via a coaxial transmission line to the series group of laser diodes, which converts the electrical pulse into a trigger light spot. The trigger light spot matches the optical window of the optically controlled multi-gate thyristor, completing the photoelectric conversion and driving the thyristor to conduct. A static voltage equalization and protection system is connected in parallel across each optically controlled multi-gate thyristor.

The application discloses a kind of double DC bus power decoupling type hybrid power system structure, belong to the technical field of hybrid power system in power electronics and new energy technology.Existing technology, traditional structure exists steady power and fluctuation / pulse power coupling, super capacitor response speed is slow, battery has the problem of impact current.The application proposes a kind of double DC bus power decoupling type hybrid power system structure, the structure is provided with two DC buses, one is connected with battery and steady load, the other is connected with super capacitor and high fluctuation / pulse load, and two buses realize energy interflow and balance by bidirectional DC converter.Battery and super capacitor have independent voltage node, and steady power and fluctuation power are separated in space.Super capacitor is directly connected with fluctuation load without interface converter, and response speed is extremely fast.Only one bidirectional DC-DC converter can realize the collaborative operation control of hybrid power system, and hardware cost and control freedom are well balanced.

The application discloses a flat-plate cascade linear folded pulse generator and belongs to the technical field of pulse power devices, and solves the technical problems of low output index and large volume of the pulse generator. The pulse generator comprises a first flat-plate conductor, a second flat-plate conductor, a third flat-plate conductor, a load and a switch. The first flat-plate conductor, the second flat-plate conductor and the third flat-plate conductor are arranged in parallel, the first flat-plate conductor and the second flat-plate conductor form a first flat-plate line, and the second flat-plate conductor and the third flat-plate conductor form a second flat-plate line. The first flat-plate line and the second flat-plate line are cascaded. The left end of the first flat-plate line is open, and the second flat-plate line is connected with the load and the switch in series. The first flat-plate line and the second flat-plate line are equal in length and equal in characteristic impedance. During operation, the first flat-plate line and the second flat-plate line are charged simultaneously. The application is used for a pulse power generator.

A kind of SSLTD driving source topology structure and SSLTD system based on magnetic coupling self-current sharing, it is related to pulsed power technology field.The topology structure includes energy storage capacitor module, switching module, magnetic core output module and magnetic coupling self-current sharing module;Switching module includes multiple parallel switching branches;Energy storage capacitor module is electrically connected with the primary side of magnetic core output module by switching branch;Magnetic coupling self-current sharing module includes multiple sequentially arranged magnetic cores and magnetic coupling coil wound on each magnetic core;Magnetic coupling coil is arranged between each group of adjacent two switching branches, so that each magnetic coupling coil corresponds to a group of adjacent switching branches;Magnetic coupling coil is sequentially connected between, to form cascaded magnetic circuit;Magnetic coupling self-current sharing module is used to utilize the magnetic coupling effect of cascaded magnetic circuit, when branch current appears difference, to generate induced electromotive force to balance each branch current.The application can improve the current imbalance between parallel branches, improve system operation stability and reliability.

This invention discloses an intelligent thermal management system and method for a high-frequency pulse power distribution cabinet, relating to the field of electrical cabinet thermal management technology. The thermal management method, applied to the cabinet body, includes the following steps: Heat dissipation channel operation step: A forced air cooling heat dissipation channel is established through an air inlet and an exhaust fan located on the cabinet body, allowing external air to flow through the electrical components inside the cabinet before being exhausted. Dual-layer filtration step: A dual-layer filter system is installed at the air inlet end of the heat dissipation channel, wherein the filter cloth system uses a continuously replaceable roll-type filter cloth. Adaptive adjustment step: Temperature sensors collect the cabinet interior temperature and ambient temperature parameters. When a preset cleaning trigger condition is met, the controller starts the drive motor, which drives the filter cloth system to perform filter cloth winding and replacement. During replacement, a temporary gap area not covered by the filter cloth appears, providing additional ventilation compensation for heat dissipation inside the cabinet.

This invention discloses a passive high-voltage isolated semiconductor switch driving device, belonging to the field of pulse power technology. This invention utilizes a narrow pulse signal to control the semiconductor switch's conduction. When no pulse signal is input, the junction capacitance of the semiconductor switch can only discharge charge through its own extremely large leakage resistance, thereby extending the drive voltage hold time and achieving long-term conduction of the semiconductor switch device controlled by the narrow pulse signal. This effectively avoids core saturation and reduces core size. A negative pulse is used to reliably turn off the semiconductor switch device, enabling effective driving of various types of semiconductor switches. The device of this invention adopts a modular and miniaturized design, can be integrated onto a PCB board and encapsulated, effectively reducing device size and facilitating expanded applications.

This invention proposes a high-efficiency welding method for closely spaced pipes, belonging to the field of welding technology. It solves the problems in the industry where manual shielded metal arc welding (SMAW) is mainly used for fillet welds of closely spaced pipe joints. This method results in high labor intensity for welding operators, low production efficiency, and weld quality that is greatly affected by the operator, making it difficult to guarantee weld quality. This invention uses solid carbon dioxide gas shielded welding wire; employs a deep-penetration, low-spatter pulsed power supply; and determines the welding sequence as a left-hand welding method. Using solid welding wire for gas shielded welding of pipe joints improves production efficiency and reduces production costs. Compared with the commonly used SMAW method, solid welding wire reduces fume generation, purifies the operating environment, and improves the company's environmental protection level.

A high voltage pulse power delivery system is provided that includes dedicated safety features including fault detection and fault management. Alongside normal communications cabling, the pulse power delivery system provides remote power over standard multi-conductor cabling without dedicated conduit or separation. This simplifies installation of equipment, increases overall speed of deployment, and significantly reduces cost for deployment. The pulse power delivery system is further configured to transport power through a pulse current waveform.

The utility model discloses a wafer cutting knife correction device, including X -axis movement module, Y -axis movement module, blade rotary motor, blade clamp, electrode rotary motor, electrode, electrode clamp, blade rotary motor is installed on the mobile part of X -axis movement module, blade clamp is installed on the rotary axle of blade rotary motor, wafer cutting knife is clamped and installed on the blade clamp, electrode rotary motor is installed on the mobile part of Y -axis movement module, the rotary axle of blade rotary motor and the rotary axle of electrode rotary motor parallelly set up, electrode clamp is installed on the rotary axle of electrode rotary motor, electrode is clamped and installed on the electrode clamp, and the electrode is close to wafer cutting knife setting when working. In this application, using pulse power, adopting electrode discharge, the cutting repair of wafer cutting knife is carried out, and the repair time of the knife sharpening is faster than the original grinding knife mode, and the original grinding knife mode needs to consume the grinding plate, and the use cost of electrode discharge knife sharpening is relatively lower.

The application discloses a kind of three-port converter energy balance control method based on power distribution of pulse frequency sudden drop, in the case where load frequency suddenly drops, the power distribution mode of AC / DC converter is switched, and the fastest change rate that AC / DC converter can provide is controlled to control input source power linearly decreases and linearly increases, after a short adjustment time, energy storage capacitor charging and discharging can be balanced, then the system enters new steady state.Compared with load frequency sudden increase, when three-phase alternating current source input power is too small, pulse load frequency sudden drop is limited by the power distribution mode of AC / DC converter, and it can make pulse load voltage fluctuate, so that the dynamic recovery time of decoupling capacitor voltage is too long, and the original power distribution mode cannot meet the demand of pulse load, so the power distribution mode of AC / DC converter needs to be switched.The problem that the dynamic performance of existing pulse power compensation control method is not optimal after load pulse frequency suddenly drops is solved.

This application belongs to the field of ultra-high-speed electromagnetic launch design analysis, specifically disclosing a design method for a wound-type electromagnetic launch system. The method includes: analyzing the electromagnetic performance of the wound-type electromagnetic launch system based on its thrust model to determine a first selection strategy for the capacitor in the system's excitation source; analyzing the system thrust, capacitor discharge in the system's excitation source, and changes in the pulse power device current to determine a second selection strategy for the number of turns in the drive coil and the number of turns in the launcher's armature coil; performing parameter selection analysis on the repetitive peak voltage, pulse peak current, critical rate of rise of the on-state current, and current pulse width of the system's excitation source to determine a third selection strategy for the pulse power device in the system's excitation source; and designing the wound-type electromagnetic launch system based on the first, second, and third selection strategies. This application enables the efficient and high-precision rapid design of wound-type electromagnetic launch systems.

This invention belongs to the field of power electronics and power management technology. It discloses a system for optimizing the timing and monitoring the status of uninterrupted power replenishment of a dual-core fusion maintenance power supply. The system includes: a status perception and prediction module, used to compare electrical feature vectors with a pre-built load feature curve library and output load status description information; a power feedforward allocation module, used to determine the real-time demand status of the load and identify the target bus voltage and feedforward compensation current; an intermittent pulse power replenishment module, used to call a pre-established anti-phase pulse injection strategy based on the judgment result to control the bus to provide pulse power replenishment to the slave unit, while simultaneously determining whether a reverse electromotive force impact occurs and generating a reverse energy absorption switching signal; and a braking energy recovery module, used to respond to the reverse energy absorption switching signal, establish a low-impedance energy recovery channel, and recover the braking energy fed back from the load to the bus, thereby improving the overall energy efficiency ratio.

This application discloses a method for breaking reinforced concrete using shock waves generated by an electrical explosion, comprising the following steps: setting up one high-voltage working point and one or more low-voltage working points on the reinforced concrete structure; constructing liquid storage chambers at both the high-voltage and low-voltage working points, and then injecting electrolyte into the liquid storage chambers to bring the electrolyte into contact with the reinforced concrete structure; arranging high-voltage electrodes to bring them into contact with the electrolyte at the high-voltage working point; arranging low-voltage electrodes to bring them into contact with the electrolyte at the low-voltage working point; connecting the end of the high-voltage electrode to the high-voltage electrode of a pulse power source, and connecting the end of the low-voltage electrode to the low-voltage electrode of the pulse power source; discharging a high-voltage, high-current through the pulse power source to the high-voltage and low-voltage electrodes, ultimately generating a shock wave that breaks the concrete. This application solves the problem of high risk associated with demolishing reinforced concrete structures using blasting methods in the prior art.

This application discloses an LTD drive system, a pulse power device, and a steep pulse ablation device, applied in the field of steep pulse ablation technology, to solve the problems of unstable high voltage output amplitude and large time deviation of rising and falling edges in existing pulse power devices. The LTD drive system uses standardized coil winding methods and uniform relative position settings for each transformer, so that when the primary coils of each transformer are synchronously pulse-energized, a pulse magnetic field is synchronously generated in the magnetic core, and finally a pulse voltage is synchronously induced in the secondary coils of each transformer. This makes the amplitude of the steep pulse after the pulse voltages induced by each transformer are superimposed stable, and the time deviation of rising and falling edges is small.

Embodiments of a multifilar inductor with at least three windings that are switchable, having a power assigned winding denoted as P1, a suppression assigned winding denoted as B, a containment assigned winding denoted as T, a switching apparatus to switch assignments between the P1, B and T windings; and a capacitor bank, wherein B suppresses the back EMF generated by a pulse power, T contains field emitted EMF generated by the pulse power. The input pulse power input is converted to a constant current output into the capacitor bank such that its time duration is extended by the combination of the inductor windings plus the capacitor bank to thereby minimize the peak inductance below the inductor's saturation point.

The present application belongs to the technical field of surface treatment of metal base material and biomass particle composite electrodeposition, and discloses a preparation method of AZ91D magnesium alloy surface nickel base nano pearl powder composite electrodeposition layer. The cathode adopts a magnesium alloy sample after chemical pre-deposition, the anode adopts a nickel plate with mass fraction greater than 99%, both are connected to the negative pole and the positive pole of the pulse power source respectively, are immersed in the pre-configured electrodeposition liquid and placed in an ultrasonic generator for electrodeposition, and the ultrasonic generator works in a variable frequency mode. The formed deposition layer has smooth appearance, compact and uniform, the hardness is increased by 20 times to 22 times compared with the magnesium alloy substrate, increased by 1.3 times to 1.6 times compared with the pure nickel layer on the magnesium alloy surface electrodeposition, and the self-corrosion current density is decreased by 2 orders of magnitude to 3 orders of magnitude compared with the magnesium alloy substrate.

The present application discloses a grid-forming energy storage system and a control system, control method, and control device therefor. The control system comprises: a first control system and a second control system, which are respectively connected to grid connection points of a power grid; and a controller, which is connected to the first control system and the second control system, and is used for acquiring a data refresh delay between the first control system and the second control system, and when switching from the first control system to the second control system, using a phase corresponding to the data refresh delay for the second control system for phase compensation control. In the present application, a phase deviation during switching is optimized, thereby achieving smooth redundant switching; fluctuations of the output voltage and power of a converter are controlled within a controllable range without changing the communication mode of a redundant system; in addition, the impact of pulse power in the redundant switching process is greatly reduced, and the service life of the grid-forming energy storage system is prolonged.