774 results about "Pulse discharge" patented technology

An apparatus for forming a generally planar metal plate into a dish with a three-dimensional pattern is provided. The apparatus comprises a mold having a forming surface with a contour corresponding to said three-dimensional pattern, and having edges corresponding to boundaries of the dish, which edges are defined by side walls essentially perpendicular to the forming plane; a forming device comprising a fluid basin and pairs of electric discharge members within the fluid and having an opening facing the mold to allow transmission of a pressure wave from the fluid to the metal plate; and an electric discharge circuitry for discharging a short and intense electric current through the pairs of electric discharge members generating an electric spark or breakdown within the fluid to yield formation of plasma, vapor or both.

A surgical instrument includes an end effector having an actuation assembly to effect a surgical procedure when actuated. An electric motor has a rated operating voltage and is operationally connected to the end effector to operate the actuation assembly. A power supply is electrically connected to the motor and selectively powers the motor to actuate the actuation assembly at least 1 and less than 16 times during a clinical life of at least one of the end effector, the motor, or the power supply. The power supply has a battery cell with a critical current rate. When activated to power the motor and actuate the actuation assembly, the power supply operates the battery cell at a super-critical current rate during a non-zero super-critical pulse discharge period lasting less than approximately 16 seconds. The power supply operates the motor above the rated operating voltage during the super-critical pulse discharge period.

The invention discloses a method and system for estimating SOC (State-of-Charge) of a power battery based on dynamic parameters. The method comprises the following steps: carrying out a discharge-standing experiment on the battery, obtaining OCV (Open Circuit Voltage)-SOC characteristic curves of the battery at different temperatures, and fitting out an OCV-SOC relational expression; carrying out a constant current pulse discharge-standing experiment on the battery, recording voltage response during the experiment, and identifying the initial value of the parameter of a battery second-order RC equivalent circuit model by an offline method; carrying out dynamic parameter identification on the second-order RC equivalent circuit model by using a forgetting factor-containing recursive least squares method RRFLS; carrying out online estimation on the SOC of the battery by using an EKF (Extended Kalman Filter) algorithm. The estimation method overcomes the defects of inaccuracy and cumulative error of the initial value of SOC in an ampere-hour integral method, and adapts to the dynamic change of battery characteristics, the battery model is high in precision and convergence speed, and is stable and reliable, and the precision of SOC online estimation is improved. The method and system can be widely used in fields of electric vehicles and energy storage battery management systems.

In one embodiment, a human-powered dry powder inhaler comprises a human-powered compressible component operable to discharge an air pulse at an outlet at a pressure of about 1-40 psi; an inflatable reservoir operable to receive an air pulse discharged from the human-powered compressible component to provide an aerosol of a dry powder pharmaceutical formulation in the reservoir, the reservoir including an outlet valve; and a receiving mask in communication with the outlet valve and operable to receive an aerosol of dry powder from the reservoir and to deliver the aerosol to at least a mouth or nose of a patient. In another embodiment, the inhaler comprises a human-powered compressible component operable to discharge an air pulse at an outlet of a polymeric pressure release valve at a pressure of about 1-40 psi; and a receiving mask in communication with the outlet of the compressible component and operable to deliver an aerosol of dry powder to at least a mouth or nose of a patient. Methods for delivery of a dry powder pharmaceutical formulation to a patient are conducted in the absence of electrical power and circuitry and pre-pressurized propellant gas. Suitable dry powder pharmaceutical formulations may include myo-inositol and / or maltodextrin as a carrier and active ingredients such as vaccines or siRNA.

The invention relates to a device for performing experiments by combining high-voltage pulse discharging and the traditional coal seam anti-reflection technology, in particular to a coal seam anti-reflection experiment device based on high-voltage electric pulse. The coal seam anti-reflection experiment device based on high-voltage electric pulse comprises a high-voltage pulse power supply, a first tube body, a second tube body, a third tube body, a rigid triaxial pressure chamber, a pressure testing pump, a hydraulic control system and a sound reflection preamplifier, wherein the first tube body, the second tube body and the third tube body are connected in sequence. The traditional hydraulic fracturing technology is simulated in the rigid triaxial pressure chamber, the high-voltage pulse power supply supplies power to a discharging electrode, therefore, the positions around a through hole of a coal sample fracture, a fracturing positions and an expanding process of the fractures in the coal sample are monitored all the time, critical factors affecting fracture development of the coal sample and state transformation of gas, an actuating range and effect laws of pulse discharging on fracture development can be obtained through the later CT scanning and electron microscopy observation results, and a theoretical foundation is provided for practical application of high-voltage pulse discharging into underground coal seam anti-reflection.

According to the present invention, a circuit and methods for enhancing the operation of SOI fabricated devices are disclosed. In a preferred embodiment of the present invention, a pulse discharge circuit is provided. Here, a circuit is designed to provide a pulse that will discharge the accumulated electrical charge on the body of the SOI devices in the memory subarray just prior to the first access cycle. As explained above, once the accumulated charge has been dissipated, the speed penalty for successive accesses to the memory subarray is eliminated or greatly reduced. With a proper control signal, timing and sizing, this can be a very effective method to solve the problem associated with the SOI loading effect. Alternatively, instead of connecting the bodies of all SOI devices in a memory circuit to ground, the bodies of the N-channel FET pull-down devices of the local word line drivers can be selectively connected to a reference ground. This would enable the circuit to retain most of the speed advantages associated with SOI devices while overcoming the loading problem described above. With this preferred embodiment of the present invention, the major delay caused by the bipolar loading effect is minimized while the speed advantage due to providing a lower, variable Vt effect is preserved. The overall body resistance of the individual devices has a minimal effect on the device body potential.

The invention discloses a method based on segmented expansion Kalman filtering for estimating the state of charge of a lithium battery. The method mainly comprises the steps of firstly, establishing asecond-order RC equivalent circuit model according to a working mechanism of the lithium battery; secondly, according to experimental data of pulse discharge responses of the lithium battery, utilizing a recursive least square method (RLS) to identify model parameters; thirdly, establishing a state space model of lithium battery discretization, adopting a segmented EKF algorithm to estimate the SOC of the lithium battery. According to the method, the suitable expansion Kalman filtering algorithm is utilized while an intensity nonlinearization process is distinguished from the working processof the lithium battery, and the robustness in the process of adopting a traditional EKF algorithm to estimate SOC is effectively improved; the problem is solved that decrease of filtering precision and possible filtering divergence are caused by Taylor series expansion linearization.

The invention discloses a rapid forming process of an iron phosphate lithium battery. The rapid forming process comprises the following steps: vacuumizing after the battery is assembled, and injecting electrolyte by several times, and sealing the battery; putting the battery into a thermostat, standing for 8-12 hours at 45-50 DEGC, turning or rotating the battery in a standing process so as to putting each face of the battery downwards for a certain time; after the standing, carrying out ultrasonic treatment on the battery for 10-20 minutes; putting the battery on a cabinet, and carrying out low-current step type charging excitation and intermittent pulse discharge on the battery; after the charging is finished, carrying out deflation and one time of vacuumizing on the battery in a glove box, and carrying out sealing, ageing and capacity grading. According to the rapid forming process, firstly a diaphragm, an anode piece and a cathode piece of the battery are adequately infiltrated by virtue of the electrolyte, and then the battery is simultaneously subjected to high-current step type charging and intermittent pulse discharge, so that the time of the forming procedure is substantially shortened, the equipment loss is reduced, the performance of the formed battery is excellent, and the formed battery has no difference from a battery formed by virtue of a traditional forming process.

The present invention belongs to the field of low temperature plasma applying technology and is especially a high-grade discharging and low temperature plasma oxidizing water processing method. One in-situ bipolar pulse discharge low temperature plasma water voltage power supply, covering of the discharge electrodes with medium, filling of the gap between the electrodes by air-liquid mixture of fine bubbles and processed water. The present invention has strengthened electric field between the electrodes, protected high-voltage electrodes and long service life, and may be used in sterilizing water, decoloring waste water and catalytically degrading matters hard to degrade biologically and lasting organic pollutant.

The invention discloses a power battery SOC estimation method based on a dynamic parameter model. The method comprises the following steps: performing a discharge-standing experiment to fit an SOC-OCV relational expression; carrying out a pulse discharge-standing experiment to identify a parameter value of a battery equivalent circuit model; establishing a battery system discrete state space model; performing online identification on battery parameters; obtaining the battery dynamic parameter model; and performing online estimation on the SOC of a battery. Further disclosed is a power battery SOC estimation system based on a dynamic parameter model. The system comprises a battery SOC-OCV relational expression determining module, a battery parameter offline identification module, a battery parameter online identification discrete state space model determining module, a battery parameter online identification module; a battery dynamic parameter determining module; a battery SOC estimation discrete state space model determining module and an SOC estimation module. The method and system provided by the invention improve the precision of a battery model, is lower in calculation complexity and can be widely applied to the field of an electric automobile power battery management system.

The invention discloses a consistency evaluation method of a power battery pack. The consistency evaluation method comprises the following steps: at preset environment temperature, the power battery pack begins to discharge according to 100 percent of a preset discharge multiplying power self-charge state, when the charge state reduces a preset charge state after preset time, preset pulse discharge current is used for carrying out pulse discharge, and discharge is carried out continuously under the current charge state after pulse discharge; pulse discharge voltage drop of each battery cell in the process of pulse discharge is calculated when the preset charge state is reduced, direct current internal resistance of each battery cell is calculated according to the pulse discharge voltage drop and preset pulse discharge current, and standard deviation of the direct current internal resistance is calculated according to the direct current internal resistance of each battery cell; and the standard deviation of the direct current internal resistance of each battery cell is compared with a standard deviation threshold value, and therefore consistency of the power battery pack can be evaluated. The consistency evaluation method is simple and convenient to operate, high in judgment accuracy, quick in judgment process, stable and reliable.

Apparatus and method for using a non-thermal plasma or corona discharge generated at multiple points and distributed to decontaminate surfaces and objects contaminated with chemical or biological agents. The corona discharge can be generated using very short high voltage pulses. The pulsed corona discharge can be directed at a contaminated surface through the unbraided strands at an end of a dielectric covered conductor. Another pulsed discharge embodiment incorporates a primary coil surrounding a chamber having a void filled with a plurality of secondary coils. A silent corona discharge can be generated using a variety of different configurations of a dielectric coated electrode and a bare electrode. The silent discharge is produced at all intersections between the dielectric covered electrode and the bare electrode. In one embodiment the apparatus comprises a blanket-like structure that is useful for decontaminating surfaces or decontaminating a fluid passing between spaced-apart bare electrodes.

The invention discloses a high-voltage cable insulation defect partial discharge on-line monitoring diagnosis method, which involves analyzing obtained partial discharge data of various actual manufacturing typical defects from the perspectives of time domain waveform characteristics, spectrum distribution differences, separate spectrum analysis and the like, and establishing a discharge database and a comparison database of the various defects. By use of a high-voltage cable partial discharge detection system, through utilizing signal separating technologies including a three-phase amplitude relation atlas, a three-frequency range amplitude relation atlas and the like, pulse current waveform parameter characteristic value integrated information is analyzed, a discharge accumulation spectrum of on-site measuring data and a same-kind characteristic pulsed discharge cluster are formed, and finally a comparison is made between the discharge accumulation spectrum and the same-kind characteristic pulsed discharge cluster and the discharge database of the various defects so as to determine whether insulation defects exist for an on-site running cable line. The method can solve the problem of difficult on-line monitoring diagnosis of insulation defect partial discharge of a conventional cable device, and also can improve the accuracy and sensitivity of high-voltage cable insulation defect partial discharge detection diagnosis.

The invention relates to a device which realizes pulse-free transformer voltage-reduction by a pulse-width modulation voltage-reduction mode to enable the efficiency of a charger to be enhanced. A quick charger induces short-time discharge pulse during charging in order to enhance the charging current receptance and achieves the quick charging purpose by depolarization; in the prior art, the discharge current is consumed and wasted uselessly, but the device absorbs the energy of pulse discharged by a storage capacitor and feeds back the energy to a charging circuit to realize back discharge, thereby enhancing the energy utilization efficiency and achieving the dual purposes of quick charge and energy saving. The essential resistance, the voltage and the temperature parameter of a storage battery are detected online in real time, fed back to an intelligent control part of the charger and used for judging the charged state and safety condition of the storage battery to continuously adjust the charging strategy so as to form a complete closed-loop control till the storage battery is charged fully. A safe (i.e. protective measures during charging the storage battery are safe), quick, efficient and intelligent charging process is realized.

The invention relates to unconventional gas reservoir permeability increasing methods, in particular to an electric pulse assisted hydrofracture unconventional gas reservoir permeability increasing method. The electric pulse assisted hydrofracture unconventional gas reservoir permeability increasing method comprises the following steps that a hole is drilled in an unconventional gas reservoir, and a discharge electrode is descended to the position of the reservoir with permeability to be increased through a winch; the drilled hole of the reservoir is sealed, and water is injected into the drilled hole of the reservoir through a water injection pipe to achieve the preset static pressure; discharge equipment is used for pulse discharge through the discharge electrode; after the discharge process is finished, the water in the drilled hole of the reservoir is drained, natural gas exhausting and mining equipment is connected, and then natural gas is collected through the natural gas exhausting and mining equipment. The high pressure pulse discharge and hydrofracture technology are integrated creatively, the cavitation effect of the high pressure pulse discharge and the instantaneous loading function of water shock are used for achieving the purposes of changing the existence state of natural gas, increasing the reservoir fracture, reducing weakening intensity, improving permeability and improving the exhausting and mining efficiency of natural gas. The electric pulse assisted hydrofracture unconventional gas reservoir permeability increasing method also has very wide application prospects on the aspect of unconventional gas exhausting and mining.

The disclosed discharge switch includes upper and lower electrodes setup inside insulated case. Pressure inside the air locked shell body formed by the insulated case and flanges at two ends of the case is 10 -3 - 10 -4 Pa. At least one of the upper and lower electrodes is a movable electrode. Trigger electrode is inlaid inside the fixed electrode or setup between the upper and lower electrodes. Since being air locked in vacuum environment, the upper and lower electrodes possess tremendous ability of ducting transient current in high energy. Moreover, operation reliability of pulse switch is raised because vacuum environment is not interfered from outside. Features are: raised reliability, very low ablation rate of electrode, and wide range of stable operation voltage.

The invention discloses a method of room air purification with low temperature plasma generated by dielectric resistance discharging. The harmful gas of air can be wiped off by dielectric resistance discharging plasma which is in magnetic field: the needle plate electrode is the reaction electrode, the dielectric resistance discharging can be realized by inserting a dielectric-slab which is 1mm-5mm in thickness at the side of the plate electrode, the distance of the needle electrode is 6mm-30mm, the nanosecond frontal high-voltage narrow pulse power supply is applied to the two ends of the needle plate electrode, the voltage is 10kv-60kv, the permanent magnet is mounted on the two ends of the electrode; The harmful gas of air can be wiped off by pulse discharging plasma which is in magnetic field. At the base of parallel magnetic field, the harmful gas can be wiped off by the low temperature plasma generated by the nanosecond frontal pulse dielectric resistance discharging in the invention, so the purification efficiency is improved greatly.

The invention discloses a storage battery internal resistance measuring method. According to the invention, the storage battery internal resistance measuring method is based on heavy current millisecond pulsed discharge and includes the following steps: the storage batter generating a discharge loop which matches the capacity of the storage battery of discharge current via a design, performing a heavy current millisecond pulsed discharge, detecting in the pulsed discharge process the variation process of a terminal voltage and the discharge current of the storage battery, and based on the Ohm law, calculating the internal resistance of the storage battery. The method can accurately measure the internal resistance of the storage battery on-line.

Work piece processing is performed by pulsed discharges between an anode (2) and a magnetron sputtering cathode (1) in solid-gas plasmas using a chamber (2) containing the work piece (7). A system (12) maintains a vacuum in the chamber and another system (14) provides sputtering and reactive gases. The pulses are produced in a plasma pulser circuit including the anode and the cathode, the discharges creating gas and partially ionized solid plasma blobs (3) moving or spreading from a region at a surface of the cathode towards the work piece and the anode. A potential is applied to the work piece so that a pulsed current comprising biasing pulses arises between the second electrodes. In particular biasing discharges are produced between the anode and the work piece when said plasma blobs have spread to regions at the anode and at the work piece so that the pulsed current is the current of these biasing discharges. The method is efficient for processing or modifying surface regions of work pieces of various kinds and configurations and can be employed for achieving efficient work piece etching, interface mixing, surface and balk diffusion, gas absorption and desorption, initial and further stages of thin film condensation, and for performing ion plating.

A metal or metal alloy foil substrate, preferably an unetched and uncoated metal or metal alloy foil substrate, such as but not limited to titanium, palladium, lead, nickel, tin, platinum, silver, gold, zirconium, molybdenum, tantalum, palladium-silver alloy, platinum-rhodium alloy, platinum-ruthenium alloy, and / or platinum-iridium alloy, is used as the cathode in an electrolytic capacitor, preferably an aluminum electrolytic capacitor having a multiple anode flat, stacked capacitor configuration. Despite a 120 Hz bridge capacitance measurement lower than with etched aluminum, the use of an unetched and uncoated metal or metal alloy foil cathode according to the present invention will inhibit gas production and not cause the capacitor to swell. Furthermore, an electrolytic capacitor built with a 30 micron unetched and uncoated foil cathode according to the present invention can deliver a stored to discharge energy ratio sufficient for use in pulse discharge applications, such as an in an ICD.

The invention discloses a lead-acid cell grouping method, comprising the following steps: detecting and recording static the voltage of a cell; detecting and recording the internal resistance of the cell; carrying out transient pulse discharging for one or more times on the lead-acid cell at different currents and discharging times; recording one or more data of discharging terminal voltage, discharging volume and discharging energy each time; after discharging detection, grouping the cell according to the difference range of one or more parameters of static voltage, internal resistance, discharging terminal voltage, discharging volume and discharging energy. The grouped cell group has high uniformity and long service life; the method is simple; and the required test device is easily realized and has strong operability.

The invention relates to a method for sorting the consistency of lithium titanate single batteries. According to the method, both static performance parameters such as capacity, voltage and internal resistance and dynamic parameters such as polarization impedance, large-current charging-discharging capacity and self-discharging capacity are considered. The method comprises the following steps that1, primary sorting is carried out according to parameters such as discharge capacity, open-circuit voltage and alternating-current internal resistance; 2, secondary sorting is carried out after the single batteries undergo high-temperature standing for a period of time; and 3, third-time sorting is carried out on the single batteries subjected to secondary sorting by detecting high-rate pulse discharge conditions, and finally the lithium titanate single batteries with high consistency are obtained. According to the method, the problem that the consistency of single batteries in an existing lithium titanate battery system is difficult to sort is solved; the performance of the battery packs which are formed by the lithium titanate single batteries sorted through the method can be better than that of battery packs which are grouped through a common grouping method; and meanwhile, compared with an existing conventional sorting method, the sorting method is simple to operate, free of redundant equipment investment, short in testing time, and facilitates industrial popularization and application.

The invention relates to a high-voltage cable insulation defect partial discharge electrification detection diagnostic method. The electrification detection diagnostic method comprises the following steps: a. establishing a partial discharge integrated fingerprint database for the cable insulation defect, wherein the partial discharge integrated fingerprint database comprises a plurality of partial discharge mode classifications; b. performing three-phase synchronous acquisition based on a high-frequency electromagnetic coupling method and storing a cable discharge pulse signal between 0.1Hz and 20MHz, analyzing the characteristic value of current waveform of the cable discharge pulse signal through signal separation so as to obtain the required discharge accumulation map and similar characteristic pulse discharge cluster; and c. contrasting the obtained discharge accumulation map and similar characteristic pulse discharge cluster with the partial discharge modes in the integrated fingerprint database, and outputting the corresponding high-voltage cable insulation defect result. According to the method, the operation is convenient, the application range is wide, safety and reliability are realized, and the effectiveness and the efficiency of the diagnosis and comparison are improved.

A process for producing high stability crystalline anodic aluminum oxide includes anodizing an anodic foil, hydrating the foil, and forming a barrier oxide layer on the foil. Anodizing the anodic foil produces nano-porous amorphous oxides which can then be converted to a crystalline precursor material by hydrating the foil. Next, an oxide layer formation step is utilized to form a barrier oxide layer on the surface of the anodized and hydrated foil. The resulting anodic oxides have very low levels of defects, voids and tensile stresses and have rise times as low as about 1 second to about 3 seconds after exposure of the formed samples to boiling water for 2 hours.

The invention discloses a discrete variable structure observer-based lithium battery SOC (state of charge) estimation method. The method includes the following steps that: a rapid calibration test is performed on a lithium battery, a relation curve of SOC and open-circuit voltage (OCV) is obtained; a lithium battery discrete state space model for SOC estimation is established; a pulse discharge test is performed on the lithium battery, the parameters of the lithium battery model are identified; the terminal voltage and charge-discharge current of the lithium battery under a real-time collection condition are obtained; and a discrete variable structure observer is constructed to estimate the SOC of the lithium battery accurately. The method not only has a good SOC estimation effect, but also can ensure convergence strictly, and exhibits strong robustness to lithium battery modeling error, internal parameter perturbation and external disturbance.

A pulsed discharge is generated between tip ends of a rotating member such as a blade and a discharge electrode including a hard material such as cBN in dielectric liquid or gas by a power supply for discharge to melt the discharge electrode, and a part of the discharge electrode is attached to the tip end of the rotating member to form an abrasive coating film including the hard materials such as cBN.

The invention relates to a device and a method for detecting the discharge state in an electric spark linear cutting work gap, and belongs to the technical field of electric spark machining. A differential sampling module of the device is connected with the two poles of an electric spark machine tool through a signal transmission cable; a signal output end of the differential sampling module is connected with a signal input end of a threshold value comparison module; a signal output end of the threshold value comparison module is connected with a signal input end of a photoelectric isolation module; a first signal input end of a complex programmable logic device (CPLD) state distinguishing and processing module is connected with a signal output end of the photoelectric isolation module; and a signal output end of the upper computer is connected with a second signal input end of the CPLD state distinguishing and processing module through a CPLD program downloading cable. The threshold value comparison module compares sampled gap voltage signals with set three threshold values through an integration comparator, and sends the comparison result to the photoelectric isolation module. The device and the method can be used for detecting the pulse discharge state of the gap in the electric spark linear cutting machine tool.

An electrostatic ion propulsion engine for satellites and spacecraft is equipped with an electron source for neutralizing the propellant gas ion beam or jet emitted by the engine. The electron source includes an anode housing, a hollow cathode tube with gas flowing therethrough, a cathode element at the outlet end of the cathode tube within the interior space of the anode housing, and a pin- or rod-shaped auxiliary electrode arranged along the lengthwise axis in the hollow cathode tube. An ignition pulse is applied to the auxiliary electrode relative to the cathode tube, which causes a pulse discharge in the cathode tube, and in turn ignites the gas discharge between the anode and the cathode which generates the electron current.

The invention discloses a screening method of the consistence of a lithium-ion battery pack. The method includes following steps: firstly, screening the consistence of the capacity of batteries; secondly, performing normal-temperature static placement for 48 h+ / -4 h; thirdly, conducting grouped serial connection tests on the batteries, and recording initial voltage data V1 and a battery DC internal resistance DCIR1 of each battery; fourthly, performing normal-temperature aging for 14 days in the condition of 25 DEG C+ / -3 DEG C; fifthly, recording voltage data V2 after battery aging, and screening the consistence of self-discharge rates of the batteries; sixthly, calculating a DC internal resistance DCIR2 of each battery, and screening the consistence of the internal resistances of the batteries; and seventhly, drawing a V-T curve of pulse discharging of the batteries, performing classification by regarding a dynamic voltage difference of 30 mV as an interval, and storing the tested batteries in a classified manner. According to the screening method of the consistence of the battery pack, based on the static consistence and the dynamic consistence of the batteries, the operation method is simple, the reliability of test results is high, and the practical condition of the battery pack is satisfied.