77results about "Liquid organic insulators" patented technology

The application discloses a manufacturing method of an involute transformer core, which comprises the following steps: S1, cutting a stainless steel silicon steel sheet to obtain a silicon steel sheet blank; S2, using a rolling tool to manufacture the silicon steel sheet blank into an involute silicon steel sheet; S3, stacking a plurality of the involute silicon steel sheets on the periphery of a base cylinder, and tightly holding the involute silicon steel sheets and the base cylinder by using a plurality of stainless steel hoops to form a holding piece, and annealing the holding piece as a whole; S4, bundling; S5, preheating the bundled piece; S6, immersing the preheated bundled piece into insulating paint; S7, solidifying the bundled piece; S8, surface treatment; and S9, gluing, coating epoxy glue on the outer surface of the component which has been surface treated in the step S8, and firmly bonding the component with an epoxy cylinder. The manufacturing method of the involute transformer core provided by the application has single specification of the involute silicon steel sheet, avoids a plurality of specifications of the width of the radial silicon steel sheet, is convenient to manage, and reduces storage devices.

The invention relates to the use of a heat-transfer fluid based on an aliphatic monoester in the manufacturing of semiconductor components.

The invention relates to the use of a heat transfer fluid based on aliphatic monoesters in the manufacture of semiconductor components.

The present invention relates to a specific combination of esters, a composition comprising it, and its uses as a lubricant and / or liquid dielectric coolant.

The present invention relates to the use of a heat transfer composition comprising at least one refrigerant selected from the group consisting of halogenated hydrocarbons, perhalogenated hydrocarbons, fluorinated ketones, fluorinated ethers, and combinations thereof, and at least one dielectric fluid, said heat transfer composition having a volume resistivity greater than or equal to 10 6 Ω.cm at 25°C, for cooling devices, such as batteries of electric or hybrid vehicles.

The invention relates to the use of a heat-transfer fluid based on an aliphatic diester in the manufacturing of semiconductor components.

There is provided a copolymer containing tetrafluoroethylene unit and perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of perfluoro(propyl vinyl ether) unit of 5.5 to 6.5% by mass with respect to the whole of the monomer units, a melt flow rate at 372°C of 36.1 to 49.9 g / 10 min, and the number of functional groups of 50 or less per 106 main-chain carbon atoms.

There is provided a coated electric wire comprising a core wire and a coating layer installed on a periphery of the core wire, wherein the coating layer comprises a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit, and a fluoro(alkyl vinyl ether) unit, the fluorine-containing copolymer has a content of hexafluoropropylene unit of 9.5 to 10.5% by mass with respect to the whole of the monomer units, the fluorine-containing copolymer has a content of the fluoro(alkyl vinyl ether) unit of 0 to 0.3% by mass with respect to the whole of the monomer units, and the fluorine-containing copolymer has a melt flow rate at 372°C of 5.6 to 8.9 g / 10 min.

There is provided a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit and perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of hexafluoropropylene unit of 9.4 to 10.1% by mass with respect to the whole of the monomer units, a content of perfluoro(propyl vinyl ether) unit of 0.8 to 1.7% by mass with respect to the whole of the monomer units, a melt flow rate at 372°C of 4.5 to 8.5 g / 10 min, and a total number of a carbonyl group-containing terminal group, -CF=CF2 and -CH2OH per 106 main-chain carbon atoms of 90 or less.

The invention relates to the use of a heat transfer fluid based on aliphatic diesters in the manufacture of semiconductor components.

This application provides a power module, an inverter, and a vehicle. The power module includes a chip, a heat conducting layer, and a heat dissipation assembly. A thermal conductivity coefficient of the heat conducting layer is greater than or equal to 200 W / mK. The heat dissipation assembly includes a heat dissipation housing. The heat dissipation housing encloses accommodation space, and the chip and the heat conducting layer are disposed in the accommodation space. At least a part of the heat dissipation housing is a hollow housing, and at least one side of the chip is in contact with the hollow housing through the heat conducting layer. The hollow housing is filled with a cooling medium for cooling the heat conducting layer, and the cooling medium is an insulated fluid medium. According to the power module in this application, insulation and sealing of the chip is implemented through the heat dissipation housing and the cooling medium having an insulation property, and a ceramic layer does not need to be disposed as an insulation layer additionally, so that thermal resistance of the power module can be significantly reduced, and heat dissipation performance and reliability of the power module can be improved.

The present invention relates to a specific combination of esters, a composition comprising it, and its uses as a lubricant and / or liquid dielectric coolant.

The present invention provides a dielectric fluid comprising an oil of natural biological origin and one or more compounds selected from the group consisting of phosphite compounds. It has been found that the addition of one or more compounds selected from the group consisting of phosphite compounds to a dielectric fluid comprising an oil imparts a stabilizing effect that reduces, inhibits, or prevents the formation of gaseous inclusions in the dielectric fluid during normal use.

There is provided a method (200) and a system (100) for monitoring a leakage of an insulating fluid from a termination device (10) of a high voltage cable connection (14). The system (100) comprises a sensor for measuring a parameter of the termination device and a controller configured to perform the method, which comprises receiving (115; 202) at least one measurement of a parameter of the termination device (10) from a sensor (110); and determining (125; 204) a level (312) of the insulating fluid within the termination device (10) based on the at least one measurement.

Chlorinated fluoroaromatic compounds having structural formula (I): wherein G is an oxygen or sulfur atom; 1 are independently fluoroalkenyl groups having 2 to 10 carbon atoms and optionally containing one or more catenated heteroatoms; each R 2 are independently (i) a hydrogen atom or a fluorine atom, or (ii) a fluoroalkyl or fluoroalkenyl group having 1 to 9 carbon atoms and optionally containing one or more linearly linked heteroatoms; R 3 is a hydrogen atom or a fluorine atom; a is 1 to 3; x is 1 or 2; y is 1 to 4; and z=6-axy. TIFF2023508543000018.tif32115

The present invention relates to the technical field of conditioning agents used in particular to block water ingress or to locally retain certain active molecules, such as fertilizers, during their dissolution in the presence of water (irrigation, rain, etc.) and thus prevent their leaching into the soil or to dry sludge. The hydro-expandable liquid composition of the invention is in the form of a dispersion comprising at least 10% and up to 40% by weight of a superabsorbent polymer in powder form, in an inverse emulsion previously distilled from an anionic or nonionic, linear, branched, or cross-linked organic polymer.

The application discloses an electrical equipment insulating liquid and a preparation method thereof, and belongs to the technical field of insulating liquid preparation. The preparation method comprises the following steps: sequentially adding trimethylolpropane, octanoic acid, decanoic acid and oleic acid into a reaction container, then adding toluene sulfonic acid as a catalyst to perform esterification reaction, and obtaining a substrate after esterification reaction; removing unreacted substrates from the substrate after esterification reaction by using a vacuum distillation method to obtain a product after distillation; naturally cooling the product after distillation, first performing alkali refining treatment by using a sodium hydroxide solution, then washing by using ultrapure water to remove sodium salt in the alkali refining process, then performing adsorption by using an adsorbent to remove water and polar impurities, then vacuum drying, and finally performing filter membrane filtration to generate trimethylolpropane octanoic acid decanoic acid oleic acid triester insulating liquid. The application can overcome the problem of low ignition point of trimethylolpropane ester insulating liquid, has excellent electrical performance, and is suitable for electrical equipment such as transformers.

An electrotechnical fluid composition, comprising more than 90 wt-% paraffins in the C17-C18 range, based on the total weight of the composition, is described. The ratio of the amount of C18 i-paraffins to the amount of C18 n-paraffins is more than 40, based on the weight of the C18 i-paraffins and the weight of the C18 n-paraffins in the composition.

A power cable including: a conductor extending along a center axis; an insulation system including at least a first semiconducting layer provided around the conductor, and an insulation layer provided around the first semiconducting layer; wherein the insulation layer includes: a) 60 to 90 wt % polypropylene; b) 5 to 20 wt % styrene block copolymer; c) 1 to 6 wt % dielectric fluid; and d) 0 to 15 wt % polyethylene.

There is provided a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit and perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of hexafluoropropylene unit of 10.3 to 11.6% by mass with respect to the whole of the monomer units, a content of perfluoro(propyl vinyl ether) unit of 1.4 to 2.6% by mass with respect to the whole of the monomer units, a melt flow rate at 372°C of 24.1 to 39.9 g / 10 min, and a total number of a carbonyl group-containing terminal group, -CF=CF2 and -CH2OH per 106 main-chain carbon atoms of 120 or less.

Processes for processing bio-sourced oil to produce bio-sourced oil dielectric fluids can be carried out using an apparatus mounted on a mobile transport platform system having a total footprint of no more than about 30 m2. The processes use a described array of pumps, heaters, filters, a degasser and vacuum system, and an additive metering / mixing valve system to achieve production under low energy and pressure conditions.

There is provided a method (200) and a system (100) for monitoring a leakage of an insulating fluid from a termination device (10) of a high voltage cable connection (14). The system (100) comprises a sensor for measuring a parameter of the termination device and a controller configured to perform the method, which comprises receiving (115; 202) at least one measurement of a parameter of the termination device (10) from a sensor (110); and determining (125; 204) a level (312) of the insulating fluid within the termination device (10) based on the at least one measurement.

There is provided a fluorine-containing copolymer comprising tetrafluoroethylene unit, hexafluoropropylene unit and perfluoro(propyl vinyl ether) unit, wherein the copolymer has a content of hexafluoropropylene unit of 10.4 to 11.4% by mass with respect to the whole of the monomer units, a content of perfluoro(propyl vinyl ether) unit of 0.5 to 1.7% by mass with respect to the whole of the monomer units, a melt flow rate at 372°C of 4.1 to 6.9 g / 10 min, and a total number of a carbonyl group-containing terminal group, -CF=CF2 and -CH2OH per 106 main-chain carbon atoms of 90 or less.

The application discloses a liquid-cooled cable for charging new energy vehicles and a production process thereof, wherein the cable comprises a cable core, a wrapping layer and an outer sheath arranged in sequence from inside to outside, the cable core comprises a first power line core located at the center and a second power line core symmetrically arranged on both sides of the first power line core in a tangential direction, heat dissipation cooling pipes are symmetrically arranged on both sides of the second power line core, the heat dissipation cooling pipes are tangentially arranged with the first power line core and the second power line core, signal line cores and control line cores are tangentially arranged in the gaps between two adjacent heat dissipation cooling pipes, the first power line core and the second power line core each comprise a power line core conductor and an insulating cooling pipe, and the insulating cooling pipe and the heat dissipation cooling pipe are combined to form a fluid circuit. The three power line cores are distributed in a straight line, the optimal distribution of heat dissipation in the space of the cable core is realized, the insulating cooling pipe and the heat dissipation cooling pipe are arranged, and the heat dissipation effect is significantly improved under the premise of ensuring the current-carrying capacity.

The invention discloses an alkaline microcapsule, a preparation method thereof and application of the alkaline microcapsule in waste grease-based insulating oil, and belongs to the technical field of insulating oil preparation, the method comprises the following steps: homogenizing and dispersing an emulsifier, a water-soluble organic base and a non-polar organic solvent to obtain an emulsion; slowly adding a wall material monomer, stirring and reacting, collecting the microcapsule, and repeatedly washing and drying in vacuum to obtain an alkaline microcapsule; the water-soluble organic base is wrapped by the non-polar organic solvent to form tiny water-in-oil liquid drops; on an oil-water interface, the water-soluble organic base promotes hydrolysis and polymerization of the wall material monomer, a shell is formed on the outer layer of the water-in-oil liquid drop, the water-soluble organic base is wrapped, and the microcapsule is formed. The insulating oil is high in specific surface area, high in alkalinity and excellent in adsorption performance, high-acid-value waste grease is used as a raw material, alkali refining is not conducted through alkali liquor, free fatty acid and impurities in the waste grease are directly adsorbed through the alkaline microcapsules, and the insulating oil with the acid value, dielectric loss, breakdown voltage and other physicochemical indexes reaching the standard is obtained.

A resin composition included in an insulating layer of a power cable includes polyethylene, and has a nitrogen content of 2.0 ppm or more and 9.0 ppm or less.

The application relates to the technical field of insulating media, and particularly discloses a preparation method of a complex ester type high ignition point insulating medium, a preparation method of a complex ester type high ignition point insulating medium, which comprises the following steps: S1, mixing polyhydric alcohol, diacid, monobasic acid, a catalyst and a water carrying agent, and performing esterification reaction to obtain an esterification product; S2, performing vacuum distillation treatment on the esterification product to obtain a synthetic ester base oil; and S3, adding an antioxidant, a metal deactivator and an anti-hydrolysis agent into the synthetic ester base oil to obtain the insulating medium; the insulating medium has the advantages of excellent anti-combustion performance, good insulation and good low-temperature performance.

The present disclosure provides a base oil produced from feedstock of biological origin and a method for producing the same. The present disclosure further provides base oil blends comprising the base oil of biological origin and at least one additional base oil.