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68results about How to "Improve long-term operational reliability" patented technology
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Automatic quantitative dosing device under oil well
InactiveCN102155205AReduce workloadInjected smoothlyCleaning apparatusFluid removalMicrocontrollerStart time
The invention relates to an automatic quantitative dosing device under an oil well. In the device, the upper part of a charging pipe is connected with a communicating joint, and the lower part of the charging pipe is connected with a pump body joint of a dosing pump; a piston rod of the dosing pump is connected with a cam, a connecting rod and a motor in sequence; the motor is connected with a control circuit and a battery; a singlechip IC2 of the control circuit is connected with a dial switch S1; a triode Q2 is connected with a triode Q1; the Q1 is connected with the motor; and a power supply is connected with the triode Q1 through a voltage regulating chip IC1. The motor starting time interval and every dosing amount can be set according to the total dosing amount of the oil well, the piston rod of the dosing pump reciprocates to spray a liquid medicine into the annular space of an oil sleeve during dosing, and the dosing pump stops working and waits for the next dosing time when a designed medicine amount is reached so that automatic timing and quantitative continuous dosing are realized. The automatic quantitative dosing device has a high automatic degree, a good dosing effect, low construction cost and high long-term working reliability, and is easy to operate; and underground dosing can be realized without detaching an instrument or performing pipe column operation.
Owner:CHINA PETROLEUM & CHEM CORP +1
Preparing method for corrosion-resistant liquid cooling heat dissipation cold plate
ActiveCN105268918AEnsure coplanarityLittle structural requirementsFoundry mouldsFoundry coresWeld seamEngineering
The invention discloses a preparing method for a corrosion-resistant liquid cooling heat dissipation cold plate and aims at providing a cold plate preparing method which is free of tedious treatment before welding and has prominent corrosion-resistant capability and long-term work reliability. According to the technical scheme, the two sides of a bottom transverse pipe commonly communicated serve as the starting points respectively, two sets of parallel pipes are longitudinally arranged continuously in a bent manner, and the bending radius of bent circular arc rings on the two longitudinal sides is larger than the distance between every two parallel pipelines; the free ends of each set of parallel pipes are fixedly connected through respective connector flanges; and the two sets of parallel pipes are fixed, clamped and positioned through pipeline clamping tools which are longitudinally arranged at intervals, die positioning plates with screw holes are adopted, wax patterns wrapping runner titanium pipes and connector flange assemblies are clamped between the two die positioning plates, and the runner titanium pipes and the connector flange assemblies are put into a smelting furnace, and a rectangular flat plate is formed through lost foam casting. The preparing method solves the problem that during traditional cold plate welding, a welding seam is prone to cracking, and consequently a cooling agent leaks.
Owner:10TH RES INST OF CETC
Rapidly discharged/charged high power lithium ion battery and manufacturing method thereof
ActiveCN108306013ATake advantage ofHigh tap densityFinal product manufactureElectrode carriers/collectorsManganateCarbon nanotube
The invention discloses a rapidly discharged / charged high power lithium ion battery and a manufacturing method thereof. The positive current collector comprises an aluminum foil and a conductive coating. The negative current collector comprises a copper foil and a conductive coating. The diaphragm is a PE material, which is bidirectionally and synchronously stretched, and ceramic oxide is paintedon the surface of the PE material. The anode paste comprises following components in parts by weight: 10 to 35 parts of lithium cobaltate, lithium nickelate, lithium manganate, lithium iron phosphate,lithium manganese phosphate, lithium iron manganese phosphate, or lithium vanadium phosphate, 62 to 81 parts of nickel cobalt lithium manganate, 1 to 3 parts of Ketjen black or carbon nanotube, and 1to 3 parts of graphene or Super-P and modified 1,3-polyvinylidene fluoride. The cathode paste comprises following components in parts by weight: 55 to 75 parts of artificial graphite or meso-phase carbon micro beads, 20.5 to 36 parts of soft carbon or hard carbon, 1 to 2 parts of CMC, 2 to 4 parts of Super-P, and 1.5 to 3 parts of styrene butadiene rubber SBR or polystyrene-acrylate. The providedlithium ion battery can continuously discharge or charge (30C). The 30C constant current charge capacity can account for 70% or more of 1C capacity, and the 30C discharge capacity can account for 90%or more of 1C capacity.
Owner:FENGFAN
Method for manufacturing 50A high-current fast recovery diode
ActiveCN104269356AReduce reverse leakage currentImprove stabilitySemiconductor/solid-state device manufacturingSemiconductor devicesDiffusion methodsSemiconductor materials
The invention discloses a method for manufacturing a 50A high-current fast recovery diode. The method for manufacturing the 50A high-current fast recovery diode comprises the steps that an N type semiconductor silicon material is provided to serve as a semiconductor substrate; the N type semiconductor substrate is doped with N+ type impurities; the N+ type impurity layer on one side of the semiconductor substrate is removed; an exposed N-type semiconductor material is doped with dual P+ type impurities; heavy metal platinum doping is conducted according to the high-temperature diffusion method; primary mask photoetching is conducted; glass powder is arranged in a passivation groove through knife coating, high-temperature sinter molding is conducted, and then PN junction glass passivation is completed; multiple metallization layers are manufactured on the two sides of a silicon wafer according to the vacuum sputtering method; secondary mask photoetching is conducted; the silicon wafer is divided into independent dies; a chip and a lead component are bonded together; the chip, the lead component and a diode holder are bonded together in a metallurgical mode through sintering; a diode cap and the diode holder are welded together in a sealed mode through percussion welding. According to the method for manufacturing the 50A high-current fast recovery diode, the manufacturing process based on the method is less influenced by the environment, the technology is mature, the stability and the repeatability are high, and the method can be widely used for volume production of high-current fast recovery diodes.
Owner:西安卫光科技有限公司
Suppression method for partial discharge at flange of GIS/GIL supporting insulator
ActiveCN113470907AHigh-precision manufacturingGood compatibilityImage enhancementAdditive manufacturing apparatusPhysicsPartial discharge
The invention discloses a suppression method for partial discharge at a flange of a GIS / GIL supporting insulator. According to the invention, reduction of electric field intensity in a flange-side local air gap area is taken as an optimization target, and optimal space distribution of flange-side insulation internal dielectric parameters of supporting insulator is solved by using a variable density or level set algorithm; and extracting the geometric contour of a high-dielectric region by using an image segmentation algorithm, and acquiring a CAD drawing of the geometric shape of the high-dielectric region through a parameter modeling mode. According to the invention, dielectric functional gradient material distribution is introduced in consideration of the mechanical properties and interface bonding strength of a cast workpiece, the structural design of a high-dielectric area workpiece is improved; a high-dielectric composite material is prepared in a high-dielectric filler / polymer blending mode, and manufacturing of the workpiece is completed through 3D printing; and finally, the high-dielectric workpiece is put into a traditional epoxy pouring metal mold, and thermocuring epoxy resin is poured to complete manufacturing of the supporting insulator.
Owner:XI AN JIAOTONG UNIV
Cathode paste of rapidly discharged/charged high power lithium ion battery and manufacturing method thereof
InactiveCN108305989AHigh tap densityIncrease compaction densityElectrode manufacturing processesSecondary cellsPolystyreneSodium-ion battery
The invention discloses a cathode paste of a rapidly discharged / charged high power lithium ion battery. The cathode paste comprises following components in parts by weight: 55 to 75 parts of active substance C, 20.5 to 36 parts of active substance D, 1 to 2 parts of thickening agent, 2 to 4 parts of conductive agent C, and 1.5 to 3 parts of binder B; wherein the active substance C is artificial graphite or meso-phase carbon micro beads; the active substance D is soft carbon or hard carbon; the conductive agent C is Super-P; the thickening agent is sodium carboxymethyl cellulose CMC; and the binder B is styrene butadiene rubber SBR or polystyrene-acrylate. The provided lithium ion battery can be rapidly charged and discharged, has high power and a long service life, and can be continuouslydischarged or charged (30C). The 30C constant current charge capacity can account for 70% or more of 1C capacity, and the 30C discharge capacity can account for 90% or more of 1C capacity. Compared with a conventional power type lithium ion battery, the charge performance is improved by 20% or more, and the discharge performance is improved by 10% or more.
Owner:FENGFAN
MMC power module thyristor overvoltage bypass test loop and test method
InactiveCN112034322AImprove long-term operational reliabilityIndividual semiconductor device testingOvervoltageReverse current
The invention discloses a test loop and an MMC power module thyristor overvoltage bypass test loop and a test method in a flexible DC power transmission small current starting stage. The test loop comprises a voltage regulator, a switch, a series resistor and a test accompanying module. The voltage regulator is used for being connected with a power supply, and the output end of the voltage regulator is connected with the series resistor in series and used for being connected with the test accompanying module and a tested half-bridge power module. The switch is arranged on a circuit between theoutput end of the voltage regulator and the series resistor; and the test accompanying module is used for enabling forward and reverse currents of the tested half-bridge power module to be consistentin size. The test method can simulate the working condition that the bypass switch refuses to operate in the small current starting charging stage in the actual engineering of the flexible direct current transmission system, and can judge whether the designed power module bypass thyristor can enable the power module to bypass reliably under the working condition or not.
Owner:EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
Dry-type high-frequency transformer
ActiveCN108305764AImprove insulation performanceReduce partial dischargeTransformers/inductances coils/windings/connectionsFixed transformers or mutual inductancesInsulation layerTransformer
The invention belongs to the technical field of a dry-type high-frequency transformer, and particularly relates to the dry-type high-frequency transformer which can be used for improving insulation performance and reducing local discharging quantity of the transformer and is provided with an insulation structure. By additionally arranging a transition layer having a buffer effect between the winding coil and the insulation layer, favorable linkage between the winding and the insulation layer is achieved, phenomena such as gap and crack between the insulation layer and the winding in the priorart are prevented, and the local discharging level can be effectively reduced; and moreover, an insulation elastic material and an electrostatic shielding material are preferably used as transition layers, a potential risk of large local discharging quantity of the insulation layer at a high-voltage side and a low-voltage side is prevented, the insulation performance of the dry-type high-frequencytransformer is greatly improved, the service lifetime of the dry-type high-frequency transformer is greatly prolonged, and the long-term running reliability of a power electronic transformer device is improved.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
Main-slave dual-standby subglacial lake recoverable detector measurement and control system and method
PendingCN108363291AAchieve gradient heating controlSafe recyclingSafety arrangmentsControl systemEngineering
The present invention discloses a main-slave dual-standby subglacial lake recoverable detector measurement and control system and method. The system comprises an upper computer, an on-ice carrier machine, a subglacial carrier machine, a RS232 concentrator, a main control panel and a slave control panel. The main control panel and the slave control panel are a main-slave relation at normal work, the slave control panel assists in collection of data, the main control panel takes on a role of 'main control' and is configured to control a winch and a heating control system and send the data collected by itself of the main control panel and the data collected by the slave control panel to the upper computer; and when the main control panel has faults, it is automatically switched that the slavecontrol panel takes on a role of 'main control' and is configured to control the winch and the heating control system and send the collected data to the upper computer. The main-slave dual-standby subglacial lake recoverable detector measurement and control system and method employ a main-slave dual-standby mode to perform detection of detector state information such as a temperature, a pressureand posture and perform gradient heating control and winch control so as to improve the long-term work reliability of a subglacial lake detector.
Owner:HANGZHOU DIANZI UNIV
Refrigerator and air duct plate thereof
ActiveCN104296458AImprove the noise reduction coefficientIncreased acoustic impedanceLighting and heating apparatusSound producing devicesResonanceRefrigerated temperature
The invention discloses a refrigerator and an air duct plate of the refrigerator. The refrigerator comprises a refrigerator body which is internally provided with refrigerating chambers, door bodies installed on the refrigerator body and used for opening or closing the refrigerating chambers and an air duct arranged in the refrigerator body, wherein the air duct comprises the air duct plate, and silencing blind holes spaced to one another are formed in the inner wall face of the air duct plate. According to the refrigerator, due to the fact that the silencing blind holes are formed in the inner wall face of the air duct plate, noise can form resonance at peak frequency bands, so that the silencing coefficient and the sound resistance of the air duct plate are improved, and the sound absorption bandwidth is enlarged. In addition, the silencing blind holes formed in the inner wall face of the air duct plate are used for replacing silencing cotton to reduce fluid noise generated when air flow flows through the air duct plate, secondary noise brought by the silencing cotton is lowered, the problem that the air duct is blocked by ice due to water absorption of sound absorption cotton is effectively solved, the production cost is reduced, and the long-term operation reliability of the product is improved.
Owner:HEFEI HUALING CO LTD
Low-temperature insulator and manufacturing method thereof
InactiveCN102723150AGuaranteed indicators of vacuumImprove long-term operational reliabilitySuperconductors/hyperconductorsSuperconductor devicesIndiumBiochemical engineering
The invention relates to a sealing device and a manufacturing method thereof, and particularly relates to a low-temperature insulator and a manufacturing method thereof. The invention aims to solve the problems that the low-temperature sealing performance of the low-temperature insulator is likely to be affected by tensile stress, bending stress and torsional stress in all warm areas, and the reliability of the insulator after repeated cooling and heat cycle is low. A sleeve is sleeved on the outer surface of a main insulating tube; an insulating pressure plate and an adapter tube are arranged at each end of the main insulating tube; each insulating pressure plate is provided with an axial through hole and four pull rod through holes; each adapter tube is provided with a ledge, passes through the axial through hole on the corresponding insulating pressure plate and is fixedly connected inside the main insulating tube; the ledge on each adapter tube is attached to the main insulating tube; the insides of the two adapter tubes and the main insulating tube are communicated to form an airflow passage; four tensioning screws are arranged between the two insulating pressure plates; and an indium ring is arranged between the main insulating tube and the ledge of the adapter tube. The low-temperature insulator is used for low-temperature pipelines.
Owner:HARBIN INST OF TECH
Preparation method of electronic equipment liquid cooling pipe assembly
ActiveCN107775594AThe method is simpleLower assembly costsHeat exchange apparatusMetal-working hand toolsPressure resistanceButt joint
The invention discloses a preparation method of an electronic equipment liquid cooling pipe assembly. According to the preparation method of the liquid cooling pipe assembly, the remarkable corrosionresistance is achieved, the pressure resistance is high, and the long-term work reliability is high. According to the technical scheme, a nonmetal hose (2) with stainless steel braiding serves as a heat exchange runner, the two ends of the nonmetal hose (2) are inserted into sleeves (3) to be in butt joint with the end faces of tower-type step shafts of pipe connectors (1) fixedly connected to thetwo ends, and the nonmetal hose (2) and the tower-type step shafts form a whole in a mechanical buckling manner. In the preparation process, corresponding buckling parameters of buckling equipment are set according to the buckling amount, a buckling tool die and the buckling equipment are used, after manufacturing of a basic cooling pipe assembly is completed, the basic cooling pipe assembly is expanded into a cooling pipe assembly in a two-way, three-way, four-way even three-dimensional five-way pipe assembly structure manner through cooperation of a cooling pipe assembly adapter (12) with astandard interface (13).
Owner:10TH RES INST OF CETC
Method for manufacturing fast-recovery glass package diode with ultra-high voltage above 13,000 V
ActiveCN104377129AReduce package sizeLower forward voltage dropSolid-state devicesSemiconductor/solid-state device manufacturingSemiconductor materialsUltra high voltage
The invention discloses a method for manufacturing a fast-recovery glass package diode with an ultra-high voltage above 13,000 V. The method comprises the steps that N type semiconductor silicon materials are adopted as a semiconductor substrate, N+ type impurities are doped on the N type semiconductor substrate, an N+ type impurity layer on one face of the semiconductor substrate is removed, P+ type impurities are dually doped on exposed N- type semiconductor materials, then heavy metal platinum doping is carried out, metallization layers on the two faces of a silicon wafer are manufactured through a vacuum coating technology, a plurality of chips are bonded to a pipe core assembly in a metallurgy mode, the silicon wafer is divided into pipe cores of the needed size, the divided pipe core assembly and a lead assembly are bonded through high-temperature sintering and metallurgy, glass passivation and packaging are carried out, adjusted glass powder paste coats the twelve pipe cores connected in series, and manufacturing of the glass package diode is completed. The method has the advantages of being high in voltage, small in forward direction, fast in reverse restoration, good in high-temperature work stability, high in long-term work stability and the like, and is widely applied to the field of aviation, aerospace, electronics, weapons, ships and the like.
Owner:西安卫光科技有限公司
Two-line flow detection electronic device
InactiveCN103033228AImprove long-term operational reliabilityAvoid the problems of using single chip microcomputerVolume meteringPower-on resetPower filter
The invention aims to provide a flow detection electronic device combining a power supply line and a communication line. According to the device, software is not used, but hardware logic controlled integrated circuit chips are used as core control components. The flow detection electronic device comprises a power supply, a clock circuit, a power-on reset circuit, an input filter protection circuit, a stand-by battery, a diode, a power filter electrolytic capacitor, an input resistor, an input interface, two reed pipes, a flow detection special integrated circuit, a reed pipe filter circuit, a gate control circuit, a line detection circuit, a battery detection circuit and a communication receiving and transmitting circuit, wherein the clock circuit, the power-on rest circuit, the input filter protection circuit, the reed pipe filter circuit, the gate control circuit, a line detection circuit, the battery detection circuit and the communication receiving and transmitting circuit are connected with the flow detection special integrated circuit respectively; the reed pipe filter circuit is also connected with the two reed pipes; the battery detection circuit is also connected with the power supply; and the communication receiving and transmitting circuit is also connected with an input end.
Owner:NO 47 INST OF CHINA ELECTRONICS TECH GRP
Air distribution screen suitably used for storage battery polar plate curing chamber
ActiveCN105470471AAvoid disturbanceEnsure consistencyLead-acid accumulator electrodesAir volumeWind direction
The invention discloses an air distribution screen suitably used for a storage battery pole plate curving chamber. The air distribution screen comprises at least one air distribution unit, wherein the at least one air distribution unit is arranged at the side edge of the curing chamber, each air distribution unit internally comprises a ventilation cavity and an air supply cavity, the ventilation cavity is provided with a rectification segment and a pressurized segment along an air flow direction, the cross section of a cavity body of the rectification segment is gradually increased along an air direction, an air inlet is arranged at the top of the rectification segment, a diversion plate is arranged in the rectification segment, the bottom of the rectification segment is connected with the pressurized segment, pressurized plates with holes are arranged in the pressurized segment, the air supply cavity is communicated with the pressurized segment, and air outlets are arranged at parts, facing the side surface of the curing chamber, of the air supply cavity. The air distribution screen disclosed by the invention can have very high air supply uniformity for the curing chamber structures at arbitrary size and total air volume, the air speed difference among all air outlets is less than 10%, and the air distribution screen has relatively high universality.
Owner:ZHEJIANG UNIV
Double single-ended pumped two-rod series connection solid state laser
ActiveCN103390854AReduced risk of burstingImprove light extraction efficiencyOptical resonator shape and constructionActive medium shape and constructionSolid-state laserSemiconductor
The invention discloses a double single-ended pumped two-rod series connection solid state laser. The double single-ended pumped two-rod series connection solid state laser comprises a first laser crystal, a first semiconductor laser pump source, a first pump light recycling device, a first thermal compensation negative lens, a second laser crystal, a second semiconductor laser pump source, a second pump light recycling device and a second thermal compensation negative lens; the first semiconductor laser pump source and the first pump light recycling device are formed into an excitation device of the first laser crystal; the second semiconductor laser pump source and the second pump light recycling device are formed into an excitation device of the second laser crystal. The double single-ended pumped two-rod series connection solid state laser has the advantages of improving the luminous efficiency of the laser due to the fact that pump light through the laser crystals is recycled through the pump light recycling devices; further improving the output power and stability of the laser due to the fact that compensation is performed on the thermal lens effect of the laser crystals through the thermal compensation negative lenses; achieving high-efficiency and high-output-power stable operation of the solid state laser.
Owner:ZHEJIANG JIATAI LASER SCI & TECH CO LTD
Downhole repeater power supplying device
ActiveCN109958412AImprove long-term operational reliabilitySurveyFluid removalControl systemLow voltage
The invention provides a downhole repeater power supplying device. The downhole repeater power supplying device is characterized in that firstly, the repeater power supplying device supplies a groundhigh-voltage direct-current power supply to a downhole repeater, then the ground high-voltage direct-current power supply is converted into a low-voltage direct-current power supply by the repeater tobe used by intelligent injection allocation devices, the downhole repeater is mounted on the upper part of the intelligent injection allocation device on the uppermost layer, the downhole repeater isconnected with a ground control system and the intelligent injection allocation devices, and the ground high-voltage direct-current power supply is firstly supplied to the downhole repeater and thenis converted into the low-voltage direct-current power supply by the repeater to be used by intelligent injection allocation devices. According to the downhole repeater power supplying device, the ground high-voltage direct-current power supply is firstly supplied to the downhole repeater and then converted into the low-voltage direct-current power supply by the repeater to be used by intelligentinjection allocation devices, and thus the long-term working reliability of an intelligent injection allocation device system is improved.
Owner:贵州航天凯山石油仪器有限公司
High-voltage power source special for electrostatic lampblack purification treatment equipment based on voltage doubling circuit technology
ActiveCN108607689AWill not deal with weak effectHigh pressure stress reductionElectric supply techniquesOvervoltageLoop control
The invention provides a high-voltage power source special for electrostatic lampblack purification treatment equipment based on a voltage doubling circuit technology. The high-voltage power source comprises a filtering rectification circuit, a PFM chopping circuit, a PFM control circuit, a high-voltage transformer circuit, a voltage doubling circuit, a high-voltage sampling circuit, a current sampling circuit, a high-voltage closed-loop control circuit, a discharge over-current protection circuit, an overvoltage protection circuit and a user feedback interface circuit. According to the high-voltage power source special for the electrostatic lampblack purification treatment equipment, the special high-voltage power source can be used for carrying out closed-loop processing on output high voltage, meanwhile, the electrostatic lampblack purification treatment equipment is easy to discharge, the characteristic that flammable lampblack is accumulated easily, and sensitive protection can becarried out; and the problem that the output high-voltage proportion change of an ionization electrode and a collection electrode is large is improved, so that the error of the proportion is lower than 1%, and the treatment effect of the electrostatic lampblack purification treatment equipment is continuous and stable.
Owner:江苏凯西电气设备科技有限公司
Small high-voltage ignition module power supply
InactiveCN101814824ASimple structureInnovative designPower conversion systemsInput controlHigh pressure
The invention relates to a small high-voltage ignition module power supply, which comprises a power supply circuit encapsulated in a shell, wherein the power supply circuit is welded with a plurality of pins and high voltage output leads and comprises an input control and driving circuit and a high voltage output circuit; and the input control and driving circuit is connected with the high voltage output circuit. The power supply circuit is simple in structure, novel in design and convenient to control; the high-pressure ignition distance is great, and the long-term operation reliability is high; an input end is isolated from a high voltage output end flexibly; and the size is small, the weight is light and the PCB mounting is easy.
Owner:东文高压电源(天津)股份有限公司
Air outlet device of floor air conditioner and air conditioner with same
PendingCN111853935ASimplify the movement mechanismImprove the dynamic air supply effectDucting arrangementsLighting and heating apparatusEngineeringMechanical engineering
The invention provides an air outlet device of a floor air conditioner and the air conditioner with the same. The air outlet device is arranged at the top of the air conditioner and comprises an air opening assembly and a rotation driving portion, wherein an air inlet and an air outlet are formed in the air opening assembly, the air inlet is used for communicating with an air outlet duct of the air conditioner, the air outlet is formed in the side wall of the air opening assembly and can be matched with the side wall of the air conditioner in an opening and closing mode, the rotation driving portion is used for driving the air opening assembly to rotate in the preset axis direction, when the rotation driving portion drives the air opening assembly to enable the air outlet to rotate to a first preset position corresponding to the side wall of the air conditioner, the air outlet is closed, when the rotation driving portion drives the air opening assembly to enable the air outlet to rotate to the position which is away from the side wall of the air conditioner and located between a second preset position and a third preset position, the air outlet is opened, and the rotation driving portion can drive the air opening assembly to enable the air outlet to do circular motion or reciprocate in any preset rotation interval between the second preset position and the third preset position. The air outlet device is simple in structure.
Owner:GREE ELECTRIC APPLIANCES INC
High-frequency high-voltage alternating-current power circuit with adjustable frequency, amplitude, and power
ActiveCN106130392AThe principle is simpleEasy to useAc-dc conversionVoltage amplitudeFeedback circuits
The invention relates to a high-frequency high-voltage alternating-current power circuit with the adjustable frequency, amplitude, and power. A regulation voltage rectification filter and power sampling circuit is connected with a main control and drive circuit, an alternating-current output frequency control and drive circuit, an alternating-current output power setting and overload protection circuit, and an alternating-current output voltage amplitude setting and feedback circuit; an alternating-current output and current sampling circuit is connected with the alternating-current output frequency control and drive circuit, the alternating-current output power setting and overload protection circuit, and the alternating-current output voltage amplitude setting and feedback circuit; the main control and drive circuit is connected with alternating-current output power setting and overload protection circuit and the alternating-current output voltage amplitude setting and feedback circuit; and a power input is connected with the main control and drive circuit and the alternating-current output frequency control and drive circuit. According to the invention, the high-frequency high-voltage alternating-current power circuit having a simple principle can be controlled conveniently; a physical power supply corresponding to the circuit has a small size and multiple functions can be provided; the long-term working reliability is high; and thus the physical power supply can be used by users conveniently.
Owner:东文高压电源(天津)股份有限公司
Method for preparing self-cleaning protective film of solar cell
The invention relates to a method for preparing a self-cleaning protective film of a solar cell, which comprises the following steps of: (1) performing hydrolytic polycondensation on tetraethoxysilane, deionized water and ethanol serving as raw materials in a volume ratio of 8-12:4-6:40-50 in the presence of hydrochloric acid serving as a catalyst at the temperature of between 68 and 75 DEG C, and adding EuCl3.6H2O in the reaction process for doping; (2) washing a glass substrate for multiple times with a detergent and the deionized water, putting the glass substrate into absolute ethyl alcohol to perform ultrasonic cleaning for 15 minutes, and drying the cleaned glass substrate at the temperature of 50 DEG C for later use; and (3) coating a film on the substrate at room temperature with a spin coater to obtain the required protective film. The method has a simple process; and the prepared film has super-hydrophilic property, and can effectively improve the transmittance and surface hardness of cover glass within the visible light range, have self-cleaning and physical protection functions on the solar cell, and prolong the service life of the solar cell.
Owner:DONGHUA UNIV
Continuous halving double-antipodal-type magnetic system permanent magnet high-gradient strong magnetic separation device
ActiveCN107855213AIncrease sorting spaceIncrease throughputHigh gradient magnetic separatorsMagnetic polesMagnetic separation
The invention discloses a continuous halving double-antipodal-type magnetic system permanent magnet high-gradient strong magnetic separation device. A rotating shaft is used as the center of the device, and the mode of symmetrically arranging magnet yokes of the same magnetic system is adopted to form complete machine front-back symmetrical magnetic poles of the antipodal-type structure. The radial center plane of a magnetism gathering medium barrel is used as a symmetry plane to form left-right halving-type symmetrical magnetic poles of the antipodal-type structure. The structural style of apolygon magnetism gathering medium barrel is adopted in the magnetism gathering medium barrel, and an inner cavity of the magnetism gathering medium barrel is divided into four regions with the same area symmetrically at the two sides of a perpendicular bisector of the magnetism gathering medium barrel in the length direction. Magnetism gathering media are symmetrically installed in the regions atthe two ends of the inner cavity of the magnetism gathering medium barrel, and the adjacent regions at the two sides of the perpendicular bisector refer to magnetism gathering medium-free regions. Square permanent magnets are adopted as the magnetic poles, and five-face square extrusion soft iron materials at the upper side, the lower side, the left side, the right side and the tail portion serveas the magnetic poles. The square soft iron materials are further used as magnetic pole guide magnetic force lines. The square soft iron magnetic poles with the five faces being extruded are symmetrically arranged to form the antipodal-type structure.
Owner:河北地质大学
Preparation method for light anti-reflection protective film of space solar cell
InactiveCN102148286AEasy to operateLow costFinal product manufacturePhotovoltaic energy generationCooking & bakingSolar cell
The invention relates to a preparation method for a light anti-reflection protective film of a space solar cell, which comprises the steps of: (1) taking ethanol, deionized water and tetraethoxysilane with the volume ratio of (40-45): (5-6): (9-12) as raw materials and hydrochloric acid as catalyst, carrying out hydrolysis polycondensation reaction at 65-75 DEG C, fully mixing and standing to prepare a coating film; (2) cleaning a substrate with acid and alkali, washing with the deionized water, then placing in the anhydrous ethanol for ultrasonic cleaning and drying for use; and (3) coating the substrate with a spin coating machine at room temperature, placing the substrate in a muffle furnace for baking after coating and cooling the coated substrate along with the furnace to obtain the light anti-reflection protective film of the space solar cell. The preparation method has simple process and low cost, and the prepared protective film has the advantages that the overall weight of a space solar cell assembly is reduced, the transmittance of cover glass is improved, the service life of the cell is obviously prolonged, the long-time working reliability is improved, and the protective film has essential practical significance.
Owner:DONGHUA UNIV
Three-dimensional high-thermal-conductivity white light LED and production method thereof
ActiveCN112993142AImprove long-term operational reliabilityReduce the temperatureSemiconductor devicesLight energyFluorescence
The invention belongs to the field of white light LED packaging, and particularly discloses a three-dimensional high-thermal-conductivity white light LED and a production method thereof. The three-dimensional high-thermal-conductivity white light LED comprises a substrate, a light reflection cavity, an LED chip and a three-dimensional high-thermal-conductivity fluorescent colloid. The light reflection cavity is installed on the substrate, the LED chip is located in the light reflection cavity and fixed to the surface of the substrate, and the LED chip is connected with a lead component; and the three-dimensional high-thermal-conductivity fluorescent colloid is filled in the reflection cavity and covers the LED chip, and the three-dimensional high-thermal-conductivity fluorescent colloid is composed of a three-dimensional high-thermal-conductivity framework and quantum dot colloid filled in gaps of the three-dimensional high-thermal-conductivity framework. Light energy can be smoothly emitted from the three-dimensional high-thermal-conductivity framework, the luminous efficiency of a white light LED is guaranteed, meanwhile, the working temperature of the fluorescent colloid is reduced, the long-term reliability is improved, and the LED has a wide application prospect.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for preparing self-cleaning protective film of solar cell
InactiveCN101891397BHigh surface hardnessPronounced superhydrophilic propertiesSolar cellPhotochemistry
Owner:DONGHUA UNIV
Charging control method of STATCOM (Static Synchronous Compensator) system
ActiveCN106849201AReduce device switching lossesImprove long-term operational reliabilityBatteries circuit arrangementsElectric powerInsulated-gate bipolar transistorPower grid
The invention discloses a charging control method of an STATCOM (Static Synchronous Compensator) system. The method is applicable to a major loop structure of a three-phase chained H-bridge cascading submodule. The method comprises the steps of selecting first N submodules with highest voltage in a periodic task and issuing an IGBT (Insulated Gate Bipolar Transistor) bypass command to allow no charging of the submodules and allow charging of other submodules in a power grid; comparing voltage of the submodules with average voltage upper limits of the submodules after the voltage of the in-phase submodules tends to be balanced; issuing the IGBT bypass command to the submodules when the voltage of the submodules is greater than or equal to the average voltage upper limits of the submodules; and keeping a control command constant when the voltage of the submodules is less than the average voltage upper limits of the submodules. The method effectively reduces IGBT switching frequency of the submodules on the basis of realizing voltage balance of the in-phase submodules, reduces switching loss of a device, and improves long-time running reliability of the STATCOM system.
Owner:NR ELECTRIC CO LTD +1
Small high-voltage ignition module power supply
InactiveCN101814824BSimple structureInnovative designPower conversion systemsComputer moduleInput control
Owner:东文高压电源(天津)股份有限公司
Preparation method of anti-corrosion liquid-cooled heat dissipation cold plate
ActiveCN105268918BEnsure coplanarityLittle structural requirementsFoundry mouldsFoundry coresWaxWeld seam
Owner:10TH RES INST OF CETC
A dry type high frequency transformer
ActiveCN108305764BImprove insulation performanceReduce partial dischargeTransformers/inductances coils/windings/connectionsFixed transformers or mutual inductancesThermodynamicsInsulation layer
The invention belongs to the technical field of a dry-type high-frequency transformer, and particularly relates to the dry-type high-frequency transformer which can be used for improving insulation performance and reducing local discharging quantity of the transformer and is provided with an insulation structure. By additionally arranging a transition layer having a buffer effect between the winding coil and the insulation layer, favorable linkage between the winding and the insulation layer is achieved, phenomena such as gap and crack between the insulation layer and the winding in the priorart are prevented, and the local discharging level can be effectively reduced; and moreover, an insulation elastic material and an electrostatic shielding material are preferably used as transition layers, a potential risk of large local discharging quantity of the insulation layer at a high-voltage side and a low-voltage side is prevented, the insulation performance of the dry-type high-frequencytransformer is greatly improved, the service lifetime of the dry-type high-frequency transformer is greatly prolonged, and the long-term running reliability of a power electronic transformer device is improved.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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