127results about How to "Won't break down" patented technology

The invention discloses working electrolyte of a 650V-700V extra-high-voltage aluminum electrolytic capacitor. The working electrolyte of the 650V-700V extra-high-voltage aluminum electrolytic capacitor comprises, by weight, 45-65% of primary solvents, 5-20.5% of secondary solvents, 10-20% of solutes, 8-25% of spark voltage improvers, 5-10% of stabilizers, 0.2-3% of hydrogen absorbents, and 2-5% of other additives. The invention further discloses a preparation method of the working electrolyte of the 650V-700V extra-high-voltage aluminum electrolytic capacitor and the 650V-700V extra-high-voltage aluminum electrolytic capacitor. According to the 650V-700V extra-high-voltage aluminum electrolytic capacitor, the working electrolyte and the preparation method of the working electrolyte, the spark voltage improvers and the stabilizers within the reasonable ranges are used, the high-voltage resistance and high-temperature resistance of the electrolyte are improved, and meanwhile the working electrolyte has low gas production performance. When the aluminum electrolytic capacitor with the electrolyte is subjected to a ripple current life test at 85 DEG C for 2000 hours, the aluminum electrolytic capacitor can resist the voltage of 650-700V and even higher voltage, and a breakdown phenomenon caused by unstable spark voltage of the electrolyte is avoided.

The invention relates to a composite hollow fiber membrane, single fiber of the composite hollow fiber membrane consists of a hole-forming component and a support component, wherein the support component is continuously distributed along the axial direction of each fiber in the composite hollow fiber membrane. The hole-forming component and the support component are one or any combination of a plurality of types of thermoplastic resin material, which are polyphenylene sulfide preferentially. The content by weight of the support component accounts for 2-90% of the total weight of the fiber membrane, which is 5%-8% preferentially, and 10-80% more preferentially. The preparation method of the composite hollow fiber membrane comprises the following steps: blending the hole-forming component with a hole-forming agent, carrying out granulation, then respectively extruding with the support component, and carrying out composition; carrying out drawing and heat setting treatment on obtained composite fibers obtained by composition; soaking the composite fibers after drawing and heat setting in a solvent for removing the hole-forming agent; and carrying out aerobic thermal cross-linking treatment on the composite fibers after removing the hole-forming agent, and obtaining the composite hollow fiber membrane. The composite hollow fiber membrane has the advantages of high temperature resistance, acid-alkali resistance and a wide range of applications.

The invention relates to a method of fabricating a trench isolation gate device. The method comprises steps: a semiconductor substrate is etched to form a trench; an oxide is deposited in the trench to form a floating gate oxide layer, the floating gate oxide layer is gradually thickened from top to bottom along the side wall of the trench, and the thickness of the floating gate oxide layer at thelower part of the side wall of the trench is the same as that of the floating gate oxide layer at the bottom part of the trench; polysilicon is deposited in the trench to form a floating gate polycrystalline layer; an insulating medium grows on the upper surface of the floating gate polycrystalline layer to form an isolation layer; and a control gate is formed on the isolation layer in the trench. A deposition technology is adopted to deposit the floating gate oxide layer at the bottom part of the trench, the floating gate oxide layer is gradually thickened from the side wall of the trench tothe bottom of the trench, and the thickness of the floating gate oxide layer at the lower part of the side wall of the trench is the same as that of the floating gate oxide layer at the bottom part of the trench. The gradually-changing floating gate oxide layer thickness can narrow the width of the trench, the cell area is further reduced, and the specific on-resistance of the device is reduced.

The invention relates to the technical field of cables and discloses a sheath material, a cold-resistant power cable and a production method thereof. The sheath material is prepared from, by weight, 35-65 parts of polyvinyl chloride resin with the average polymerization degree of 2500, 35-65 parts of polyvinyl chloride resin with the average polymerization degree of 1300, 40-50 parts of dioctyl phthalate, 25-35 parts of powdery butyronitrile rubber, 10-20 parts of dioctyl sebacate, 10-20 parts of modified filler activated light calcium carbonate, 6-10 parts of high-temperature plasticizer, 6-10 parts of composite stabilizer, 3-7 parts of ethylene-vinyl acetate monomer copolymer and 0.5-1.5 parts of polyethylene wax lubricant. The phenomena such as sheath cracking and insulation breakdown occurred in the layout and operating process of the power cable are avoided by utilizing the cold-resistant power cable made from the sheath material.

The invention discloses an output stage circuit of a high-side switch, and belongs to the technical field of power integrated circuits. According to the output stage circuit provided by the invention,an output negative voltage clamping module is combined with a power tube grid driving module and a power tube to realize inductive load rapid demagnetization, and the power tube is adopted to replacea similar Zener circuit to flow through large current in a traditional scheme, so that the layout area is saved; the absolute value of the negative voltage of the source electrode of the power tube during inductive load demagnetization is limited within a limited range through the negative feedback system so as to ensure the safe operation of the whole system; in the power tube grid driving module, the magnitude of the grid source voltage of a power tube is limited through a first NMOS tube and a seventh PMOS tube, and it is guaranteed that grid oxide of the power tube cannot be broken down under any condition. Meanwhile, a super source follower structure is applied to the output negative voltage clamping module, so that the loop gain of a negative feedback loop during output negative voltage clamping is improved, and the clamping precision is improved.

The invention relates to the technology of electronic accelerators, in particular to an electronic irradiation accelerator with a titanium film protecting function. The electronic irradiation accelerator structurally comprises an accelerating tube connected with an electronic gun, the accelerating tube is connected with a scanning box through an electronic vacuum transmission pipeline, a scanning magnet is arranged at the front end of the scanning box, and a titanium film is arranged at an outlet position of the scanning box. A single lens for expanding electron beam spots is arranged on the electronic vacuum transmission pipeline outside an outlet of the accelerating tube. When the single lens is a quadrupole lens, a second quadrupole lens can be arranged on the electronic vacuum transmission pipeline at the rear side of the quadrupole lens. A plurality of accelerator components are used for expanding the beam spots, failure of any one component can not cause puncture of the titanium film, and the possibility that two components fail simultaneously is small, so that working reliability of the electronic irradiation accelerator is guaranteed.

The invention relates to a sensor, in particular to a reinforced concrete embedded type corrosion sensor. The invention provides the reinforced concrete embedded type corrosion sensor which is provided with four pairs of corrosion galvanic couples, a hollow bar, a base and a connecting lead, wherein the corrosion galvanic couple consists of an anode and a cathode, and is fixed on the hollow bar; the hollow bar is fixed on the base; the lead firstly passes through a thread hole of the hollow bar, and then is led out from a groove of the base; and the hollow bar and the base are embedded and filled by epoxy resin. The reinforced concrete embedded type corrosion sensor has small volume, thus having less influence on concrete structure; the structure is simple and firm, so that the corrosion sensor can not be washed away when pouring concrete; the processing is convenient, and the cost-performance ratio is high; the materials are easy to obtain; the corrosion sensor is installed in the concrete before pouring the concrete, so that the corrosion sensor can conduct long-term monitoring on reinforced concrete structure from early stage, and monitoring environment is the same as reinforced concrete environment; the area ratio and distance between the anode and the cathode can be determined and adjusted according to needs or specific experiment tests; and the corrosion sensor can be installed at a pre-monitoring point and an important cross section according to the needs, with convenient installation and operation.

The embodiment of the invention provides a filter, a receiver, a transmitter and a transceiver. The filter comprises a resonant cavity assembly, a micro-strip filer assembly and two connecting elements. The resonant cavity assembly includes at least two resonant cavities connected in parallel and each resonant cavity is provided with a resonator and a tuning screw; the micro-strip filer assembly includes a medium substrate and a micro strip arranged on the medium substrate; and one connecting element enables one end of the micro strip and the resonator of one resonant cavity to be connected in matching mode and the other connecting element enables the other end of the micro strip and the resonator of the other resonant cavity to be connected in a matching mode. The impedance of the resonant cavity assembly is less than that of the micro-strip filer assembly. According to the invention, the miniaturization of the general size can be realized and the power capacity index can also be ensured.

The invention provides a card connector which comprises an insulation body and a plurality of terminals fixed to the insulation body. Each terminal is provided with a fixing portion, elastic arms and a welding portion, wherein the fixing portion is fixed into the insulation body, the two side edges of the fixing portion extend to form the elastic arms and the welding portion respectively, and a contact portion used for making contact with a butt-joint electronic card is formed on each elastic arm. Each terminal is further provided with a plurality of bent guiding parts which are bent downwards from at least one side of the elastic arms so as to guide the corresponding butt-joint electronic card. Due to the facts that each terminal is provided with the bent guiding parts bent downwards from the elastic arms, and when the electronic cards are inserted into the terminals, the electronic cards can firstly make contact with the bent guiding parts, the elastic arms are pressed downwards, and the electronic cards can be smoothly inserted into the terminals and make full contact with the contact portions; due to the design of the bent guiding parts, when inserted into the terminals, the electronic cards can be guided, the height of the elastic arms is gradually decreased, and the phenomenon that the terminals collapse due to the fact that the electronic cards abut against the terminals is avoided.

A method for manufacturing a laterally diffused metal oxide semiconductor transistor, comprising: providing a semiconductor substrate, depositing a field plate dielectric layer on the semiconductor substrate, patterning the field plate dielectric layer, and forming a laterally diffused metal oxide semiconductor transistor. Field plate of an oxide semiconductor transistor. The present invention makes field plates by depositing a field plate dielectric layer on a semiconductor substrate, and the electric field lines below the field plates do not bend, which solves the channel penetration problem caused by the bending of electric field lines; at the same time, through isotropic etching The method forms a slope-shaped transition at the edge of the field plate, and the slope-shaped transition at the edge of the field plate prevents the grid electrode on the field plate from being broken down due to tip discharge.

The invention relates to the field of power semiconductors, and particularly provides a SiC power device integrated with a fast recovery diode. The SiC power device comprises a SiC MOSFET and a SiC IGBT, wherein for the SiC MOSFET device integrated with a PN junction body diode, the reverse recovery charge and related loss of the body diode can be greatly reduced, the reverse recovery peak currentis reduced, and the EMI noise is reduced; for a reverse conducting SiC IGBT integrated with a PN junction body diode, the reverse recovery charge and related loss of the body diode can be greatly reduced, the reverse recovery peak current is reduced, and the EMI noise is reduced; and meanwhile, by arranging an anode deep groove at the bottom and designing the depth of the anode deep groove and the distance between the grooves, the resistance of an electron flowing path is adjusted, and the output characteristic of the reverse conducting IGBT can enter a bipolar working mode without turning ina unit cell.

The invention provides a method for manufacturing gold-inlaid relief sculpture artistic porcelain. The method sequentially comprises the following steps of: 1) designing and drawing decorating patterns; 2) manufacturing a corrosion-resistance mask; 3) repasting the corrosion-resistance mask; 4) performing abrasion treatment; 5) applying gold; and 6) burning, wherein the step of performing the abrasion treatment is to abrade porcelain adhered with an abrasion mask with relief sculpture decorating patterns on an abrader; the step of applying gold is to apply 12 percent of gold paste to a corresponding region of the cleaned and dried porcelain which is subjected to the abrasion treatment by using a writing brush, and the gold-inlaid relief sculpture porcelain decorating patterns are predesigned in the region; and the step of burning is to flat place the porcelain in a roller table type continuous operation high-temperature rapid decoration firing kiln for firing. According to the manufacturing method provided by the invention, body health of operators and ecological environment are prevented from damages, a relief sculpture layer is over 100microns thick and has a remarkable stereoscopic and spatial impression. Furthermore, the profile of the relief sculpture texture patterns is bright, clean, fine and smooth, the edges of the patterns are sharp and steep without burrs, and gold is inlaid in the relief sculpture to show a sumptuous and elegant impression.

The present invention relates to a high-voltage vacuum circuit-breaker. It is composed of upper wiring flange, lower wiring flange, arc extinguishing unit, frame, supporting frame and control box. The frame is fixedly mounted on the supporting frame, the three-phase arc extinguishing unit is fixedly mounted on the frame, all the movable components of said arc extinguishing unit are mechanically connected on the spring mechanism in the control box, the arc extinguishing unit is characterized by that in its arc extinguishing chamber a vacuum tube is mounted, and its movable contact and static contact are mounted in the vacuum tube.

The invention discloses a gate drive circuit, a power switching circuit and a gate drive method. The gate drive circuit comprises a power supply end, a grounded end, an input end and an output end, wherein the gate drive circuit receives gate drive input signals at the input end, and provides gate drive output signals at the output end to drive a semi-conductor switch, the gate drive circuit further comprises a clamping end, the gate drive circuit keeps a voltage difference between the output end and the clamping end at a first constant value when the gate drive input signals are first levels, and the gate drive circuit keeps the voltage difference between the output end and the clamping end at a second constant value when the gate drive input signals are second levels. The gate drive circuit can keep a gate source voltage of the semi-conductor switch at a constant voltage difference, and it is avoided that the gate source voltage changes because of influence of loads. The gate drive circuit can prevent the situation that the semi-conductor switch is broken through because of the high gate source voltage.

The invention discloses high insulation resistance refractory ceramic rubber for a heating cable and a preparing method thereof. The ceramic rubber is mainly prepared from, by weight, 40-45 parts of silicone rubber, 20-25 pars of ceramic powder, 15-20 parts of glass powder, 5-10 parts of quartz powder, 8-10 parts of mica powder, 5-10 parts of vapor phase method white carbon black, 0.5-1 part of coupling agent, 2-5 parts of softening agent and 0.8-1 part of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane. The preparing method comprises the steps of placing the raw materials in a rubber mixing mill for mixing, wherein mixing temperature is controlled to be 50-60 DEG C, and mixing time is 15-20 min; then conducting filtration with a rubber filter to obtain the required ceramic rubber, wherein the rubber filter is provided with three layers of filter nets, which are the 20-mesh filter net, the 40-mesh filter net and the 60-mesh filter net from inside to outside in sequence. The ceramic rubber has the advantages of being high in insulation resistance refractory property, good in dampproof insulation effect and long in service life. The operating temperature of the heating cable with the ceramic rubber as an insulating layer can reach 600 DEG C, dampproof insulation effect is good, safety performance is high, and breakdown of the cable can not be caused even if an outer sheath is abraded or soaked.

The invention provides silver-aluminum paste for a front electrode of a high-sheet-resistance N-type solar cell and a preparation method of the silver-aluminum paste, and belongs to the technical field of solar cells. The silver-aluminum paste for the front electrode of the high-sheet-resistance N-type solar cell comprises the following components in percentage by weight: 80wt%-90wt% of silver powder; 0.5 wt% to 2 wt% of aluminum powder; 1 wt% to 6 wt% of glass powder; 1 wt% to 10 wt% of an organic vehicle; and 0.01 wt% to 2 wt% of an additive. According to the invention, by adding a proper amount of the additive, the damage of the glass powder to the PN junction can be effectively inhibited, so that the glass powder can corrode the SiNx layer on the surface of the silicon wafer and does not break down the PN junction, good ohmic contact is formed between metal and silicon, and the photoelectric conversion efficiency is further improved.

The invention relates to a high-power electronic ballast for suppressing surge current and realizing soft start by adopting an active secondary detection technology. The high-power electronic ballast comprises an EMI (Electro-Magnetic Interference) filter circuit, a rectifying circuit, an MCU (Micro-programmed Control Unit), a sampling detection circuit and a half-bridge inverter circuit, wherein the output end of the rectifying circuit is connected with one end of a first inductor L11; the other end of the first inductor L11 is connected with the drain of a field effect tube QE and the anode of a diode D11 respectively; the cathode of the diode D11 is connected with one end of a second resistor R12 and one end of a first resistor R11 respectively; and the other end of the second resistor R12 is connected with one end of a third resistor R13 and the sampling detection circuit respectively. After a power supply is switched on, startup surge current is suppressed through the resistor R11, secondary detection is performed by using a sampling circuit, and the circuit is controlled to send a command for running the half-bridge inverter circuit when the voltage reaches 400V, so that real suppression of surge current and soft start are realized.

The invention discloses a blast furnace top airtight box sealing device which comprises an airtight box shell and a rotating sleeve, wherein the airtight box shell is mounted at the top of a blast furnace; a circle of ring-shaped baffle is arranged on the bottom plate of the airtight box shell around a discharge hole; the ring-shaped baffle and the airtight box shell form a ring-shaped water channel; water is contained in the ring-shaped water channel; the lower end of the rotating sleeve is exactly inserted downwards into the ring-shaped water channel and immersed in the water in the ring-shaped water channel; an overflow opening is formed in the side plate of the airtight box shell above the water in the ring-shaped water channel; the overflow opening is communicated with the water inlet pipe section of an upright U-shaped water sealing pipe; the water outlet pipe section of the U-shaped water sealing pipe is communicated with a drain pipe; the water column in the water outlet pipe section of the U-shaped water sealing pipe is higher than the water column in the water inlet pipe section so as to ensure that the pressure difference between the water column in the water outlet pipe section and the water column in the water inlet pipe section of the U-shaped water sealing pipe is greater than the sum of the pressure at the top of the blast furnace and the negative-pressure draft generated during the drainage of the drain pipe all the time. The blast furnace top airtight box sealing device has the advantages of being good in sealing property and low in enterprise cost.

The invention provides a rear earth aluminum alloy material, comprising the following components in percentage by weight: 0.5-3% of Fe, 0.5-3% of Cu, 0.5-3% of B, 0.5-2% of Si, 0.5-3% of Mg, 0.5-3% of Zn, 0.5-3% of rare earth element and the balance of aluminum and inevitable impurities, wherein the rare earth element is one or more than one selected from Sc, Y, La, Ce, Pr and Nd. The rear earth aluminum alloy material is used for a metal chain armored cable material and has higher mechanical strength and good corrosion resistance performance.

The invention relates to the technical field of protective film products, and in particular, relates to an explosion-proof film for glass backboards, wherein the explosion-proof film comprises a basematerial layer; an optical adhesive layer and a release film are sequentially attached to the upper surface of the base material layer, and an electroplated layer and a protective layer are sequentially attached to the lower surface of the base material layer; the optical adhesive layer adopts a thermocuring optical adhesive coating layer, and an anti-ultraviolet blocking agent and a pigment are added into the optical adhesive layer; the protective layer is a black film layer. The explosion-proof film can be applied to the glass backboards of electronic products such as mobile phones, not onlyhas the effect of protecting the glass backboards, but also can be used as a pattern forming carrier of the glass backboards, and laser-engraved patterns can be directly transmitted through the glassbackboards. The anti-ultraviolet blocking agent is added into the optical adhesive layer, so that when the patterns are engraved by laser, the anti-ultraviolet blocking agent can block the laser to acertain extent, the explosion-proof film is prevented from being broken down, and meanwhile, the phenomenon that patterns are discontinuous due to the fact that the laser intensity is too low can beprevented.

The invention discloses a large-formwork casting construction method for a transformer station accident oil pool. The method is used for casting the transformer station accident oil pool, and comprises the following steps of A, positioning and formwork matching; B, guide wall arrangement; C, inner formwork assembling; E, top formwork arrangement; F, concrete casting; and G, formwork dismounting. The method has the advantages that the oil pool can be cast and formed in a layered way; the single casting of a top cover is not needed; the integrality of the oil pool is improved; the formwork installation is simple, stable and firm; the cyclic utilization can be realized; and materials are saved.

A double power sources switching control system of an electric car comprises a battery pack A, a battery pack B, a relay KM1, a relay KM2, a direct-current switch power source, a voltage sampling voltage, a voltage comparison device, a battery automobile switching circuit and an electric quantity display device. According to the double power sources switching control system of the electric car, the capacity of each of the two power sources is smaller than that of the large power source of the original electric car. Therefore, the weight of the finished automobile and the designed weight are basically kept unchanged, and the performance of the electric car does not change. When the double power sources switching control system of the electric car is used, one battery pack is used for supplying electricity, and the other battery pack is automatically switched to supply electricity when the currently used battery pack is used up. Accordingly, even though one battery pack goes wrong, the electric car does not drop the anchor outside. Furthermore, the double power sources switching control system of the electric car is provided with a manual switching device. Manual switching can be performed on the battery packs when the automobile switching circuit performs judgment mistakenly.

The invention relates to a copper alloy wire. The copper alloy wire contains 0.1-3% of Ag, 460-1000 ppm of a trace additive element and the balance of copper; and the trace additive element is the combination of one or more in Ca, Be, In and Ge. The invention further provides a manufacturing method of the copper alloy wire. The copper alloy bonding wire in the invention has the beneficial effectsthat: after being routed, the product has high resistance to humidity in high-temperature, high-humidity and high-voltage conditions; the adhesive power between a welding spot and a bonding pad is good; the copper alloy bonding wire has excellent operability and reliability; the anti-aging performance is good; the hardness of a wire rod is relatively proper; the routing camber height is greatly reduced; when IC routing is carried out, breakage and damage to a welding electrode are avoided; the good bonding performance is provided; and the cost is relatively low.

A storage capacitor comprises an energy storage capacitor and a temperature control circulating device connected therewith, the energy storage capacitor includes a box body, a box cover and a plurality of ceramic capacitor units, wherein the box cover is in sealed connection with the box body, the ceramic capacitor units are arranged in the box body, the dielectric strength of liquid filled in the box body is over 20KV/mm, the ceramic capacitor unit is provided with a plurality of negative plates and positive plates, and the negative plates or the positive plates are provided with a plurality of protrusions. The liquid of high dielectric strength is filled among the negative plates and the positive plates inside the box body, thereby the electrode plates do not break down and self-discharge easily under high tension temperature, and additionally, the temperature in the box body can be controlled through the circulating liquid, thereby guaranteeing the storage capacitor to work under optimal working environment.

The invention provides a full-range calibration device and method of high voltage nanosecond pulse voltage divider calibration factors to reduce the measurement deviation of nanosecond pulse voltage in a pulse power technology. According to the full-range calibration device and method, the characteristic that the calibration coefficient of a nanosecond pulse electric field measuring probe can be calibrated by devices such as a GTEM cell or a TEM cell in a large amplitude range is utilized, by correlating the nanosecond pulse voltage and the nanosecond pulse electric field, the present situation of a nanosecond pulse voltage non-standard measurement system under a high-voltage level is skillfully avoided, the calibration of the calibration coefficient of the nanosecond pulse divider under hundreds of kilovolts voltage level is achieved, and the traceability problem of hundreds of kilovolts voltage measurement in the pulse power technology is solved.