44results about "Inhomogenous insulation material" patented technology

An electric winding assembly includes a conductor core having a first end and an opposing second end, an insulation layer overlying the conductor core, and a conductive shield layer overlying the insulation layer. The conductive shield layer includes an insulative carrier circumferentially surrounding the insulation layer and a conductive layer disposed on the insulative carrier, the insulative carrier formed from a material having a thermal rating greater than 180° C., the conductive shield layer having a surface resistivity between 1.5 and 10 ohms per square.

The present invention relates to a method for preparing an electrical cable comprising a step of applying an insulating layer around at least one elongated electrically conductive element from a polymer composition, wherein mineral precursors are introduced into the polymer composition prior to said application, which are then converted into mineral particles. The invention also relates to cables obtained according to this method that comprise mineral particles within their insulating layer, and which are particularly well suited for the transmission of medium- or high-voltage direct current. Figure for the abstract: NONE

In one aspect, the insulating composition is an insulating composition including solids in an amount of 35% by weight or less based on the total weight, wherein the solids include inorganic particles and a polymer material, and the insulating composition has a viscosity of 4,000 mPa·s or more at a shear rate of 0.0251 s-1 and a viscosity of 400 mPa·s or less at a shear rate of 251 s-1. The insulating composition has low viscosity at high shear rates and high viscosity at low shear rates, thereby providing excellent coating processability and enabling formation of a narrow insulation width by minimizing sliding portions during insulating layer formation, which can prevent the problem of reversal of the positive electrode / negative electrode capacity ratio that may occur due to sliding portions.

An electric winding assembly (100), (200), includes a conductor core (108) having a first end (110) and an opposing second end (112), an insulation layer (114) overlying the conductor core (108), and a conductive shield layer (116) overlying the insulation layer (114). The conductive shield layer (116) includes an insulative carrier (117) circumferentially surrounding the insulation layer (114) and a conductive layer (118) disposed on the insulative carrier (117), the insulative carrier (117) formed from a material having a thermal rating greater than 180°C, the conductive shield layer (116) having a surface resistivity between 1.5 and 10 ohms per square.

A dielectric that has excellent electrical characteristics and causes no blistering of a copper foil during production of a copper-clad laminate using the dielectric, and a method for producing the same are provided. Further, a copper-clad laminate using the dielectric, and a method for producing the same are provided. The dielectric has a residual organic matter content of 500 μg / g or less. The metal-clad laminate has the dielectric and a metal foil.

The thermoplastic resin is used as a matrix, the heat-conducting filler, the flame retardant and the flexibilizer are added to jointly prepare the heat-conducting insulating sheet, the prepared heat-conducting insulating sheet has the performance of heat conduction, insulation, flame retardance and the like, and meanwhile the thickness can reach 0.05-1 mm. Besides, the extrusion and calendering process is adopted for preparing the heat-conducting insulating sheet with the thermoplastic resin as the matrix, accurate control over the thickness can be achieved, and meanwhile no hole is generated on the basis that the thin-wall state of the heat-conducting insulating sheet is met.

A dielectric that has excellent electrical characteristics and causes no blistering of a copper foil during production of a copper-clad laminate using the dielectric, and a method for producing the same are provided. Further, a copper-clad laminate using the dielectric, and a method for producing the same are provided. The dielectric has a residual organic matter content of 500 µg / g or less. The metal-clad laminate has the dielectric and a metal foil.

There is provided a laminate having excellent partial discharge resistance even in a high-humidity environment and also having excellent insulating properties. A laminate comprising at least a conductor and an insulating coating, wherein the insulating coating is composed of a nanocomposite formed of a resin composition in which a metal oxide hydrate is dispersed in a resin, and wherein the metal oxide hydrate has a negative zeta potential when dispersed in N-methyl-2-pyrrolidone (NMP).

A microisolator has been described that exhibits an enhanced isolation breakdown voltage. The microisolator may include an electrically floating ring surrounding one of the isolator elements of the microisolator. The isolator element may be a capacitor plate or a coil. The electrically floating ring surrounding one of the isolator elements may reduce the electric field at the outer edge of the isolator element, thereby enhancing the isolation breakdown voltage.

To provide a dielectric that exhibits superior electrical properties and does not cause the blistering of copper foil during the production of a copper-clad laminate using the dielectric, and a production method therefor, and also provide a copper-clad laminate using the dielectric and a production method therefor.SOLUTION: A dielectric has a residual organic matter content of 500 μg / g or less. A metal-clad laminate includes the dielectric and a metal foil.SELECTED DRAWING: None

The present invention provides a stator insulating material suitably applicable to a stator having a high-density coil, as well as a stator having a coil insulated by the stator insulating material and a method for manufacturing the same. [Solution] The stator insulating material contains epoxy resin, a curing agent, and spherical inorganic fillers, and is used for insulating between the coils of the stator.

The invention relates to conductive textile yarns, threads, or strands for textile-technological structure production, in particular for electronic textiles with active and / or passive electronic components, wherein the yarn, thread, or strand has an electrically insulating sheath or coating around its core. According to the invention, the sheath or coating has thermally meltable properties and, while maintaining its high resistance, is provided with a homogeneous doping of conductive microparticles, wherein a local, time-controlled application of temperature and pressure to the sheath or coating allows for the creation of a localized, electrically conductive access point to the core.

The invention provides a resin composition and a manufacturing method thereof. The resin composition comprises a resin carrier, conductive carbon black and graphene. The conductive carbon black and the graphene are dispersed in the resin carrier. Based on the total weight of the resin composition, the resin carrier accounts for 93 wt%-97 wt%, the conductive carbon black accounts for 1 wt%-3 wt%, and the graphene accounts for 2 wt%-4 wt%. According to the resin composition and the manufacturing method thereof provided by the invention, the conductive carbon black and the graphene in the resin composition can reduce the surface resistance of the resin composition, so that the accumulation of electrostatic charges is reduced.

The invention provides an electric machine and a method for electrically insulating parts of the electric machine. An electrical winding assembly includes a conductor core having a first end and an opposite second end; an insulating layer covering the conductor core; and a conductive shielding layer covering the insulating layer. The conductive shielding layer includes an insulating carrier circumferentially surrounding the insulating layer, the insulating carrier formed of a material having a heat resistance rating higher than 180 DEG C, and a conductive layer disposed on the insulating carrier, the conductive shielding layer having a surface resistivity of between 1.5 and 10 ohms / square.

The present disclosure provides a dielectric which has excellent electrical characteristics and does not cause copper foil expansion when a copper-clad laminate is manufactured using the dielectric, and a method for manufacturing the dielectric. Also provided are: a copper-clad laminate using the dielectric; and a method for producing the copper-clad laminate. The dielectric is characterized in that the amount of residual organic matter is 500 [mu] g / g or less. A metal-clad laminate has the dielectric and a metal foil.

An insulating composition according to an embodiment of the present invention comprises a solid portion at a content of 35 wt % or less with respect to the total weight thereof, wherein the solid portion comprises inorganic particles, a polymer material, and clay, the clay has positive and negative charges distributed in the particles and is included in an amount of 0.01 parts by weight to 10 parts by weight with respect to 100 parts by weight of the solid portion, and the polymer material comprises a functional group-containing polymer. The insulating composition exhibits low viscosity at high shear rates and high viscosity at low shear rates, thereby providing excellent coating processability. During formation of an insulating layer, sliding portions are minimized so that the insulation width can be formed narrowly, thereby preventing a problem in which the positive / negative electrode capacity ratio may be reversed due to sliding portions.

A gas-insulated switching device comprises a conductor held by an insulating spacer within a sealed container filled with insulating gas. An insulating layer is applied to the surface of the curved conductor within the device. This insulating layer is formed by laminating an insulating material to the conductor's surface using either a thermal spraying or an aerosol deposition process. Ceramic particles are typically used as the insulating material. The insulating layer is then impregnated with an insulating resin.

A cable includes an inner conductor and a dielectric layer extending around the inner conductor. The dielectric layer includes a linearly-stretched polypropylene film having a porous structure that includes a plurality of pores that extend through a thickness of the linearly-stretched polypropylene film. The dielectric layer includes air molecules trapped within the pores of the linearly-stretched polypropylene film such that the dielectric layer includes polypropylene and air. The cable includes an outer conductor extending around the dielectric layer.

An insulated electrically conductive element (1) for the aerospace field has an elongate electrically conductive element surrounded by at least two layers, said two layers being an electrically insulating layer (4) surrounding the elongate electrically conductive element (2) and a first semiconductor layer (5) surrounding said electrically insulating layer (4), at least one of the layers having at least one fluoropolymer.

Various applications of the teachings of the present disclosure include a powder coating formulation suitable for producing an insulation system of an electrical machine. The formulation may include: a curable resin mixture; and spherical SiO2 filler particles having a maximum particle diameter of 100 μm.

A compound for insulation may include a polymer and a filler. A method for insulating a wire using said compound comprises melting a polymer to form a molten polymer, mixing the molten polymer with a filler to form an insulation compound, applying the insulation compound along a wire, and cooling the insulation compound at a controlled rate to form a uniform crystal.

A process for the manufacture of a non-curable silicone composition comprising carbon black, and its use in the manufacture of a curable silicone composition, in particular for high voltage direct current (HVDC) applications.

A method for forming magnet wire with improved partial discharge performance may include providing a conductor, forming a first layer of polymeric enamel insulation formed around the conductor, and forming a second semi-conductive layer around the first layer. Forming the second layer may include providing a base polyamic acid and complexing filler particles with the base polyamic acid. The polyamic acid may be applied around the first layer, and the filler particles may migrate towards an outer surface of the second layer. The polyamic acid may be cured to form a semi-conductive enamel layer, and at least sixty percent by weight of the filler particles may be positioned within an outer half of the second layer following the migration.

This application relates to a non-spherical particle. The non-spherical particle has a first dimensional size, a second dimensional size, and a third dimensional size. The first dimensional size is between 0.01 µm and 1 µm, a ratio of the first dimensional size to the second dimensional size is between 1 / 10 and 1 / 1200, and the third dimensional size is between the first dimensional size and the second dimensional size. The non-spherical particle includes one or more elements of titanium (Ti), magnesium (Mg), aluminum (Al), nickel (Ni), silver (Ag), copper (Cu), indium (In), tin (Sn), silicon (Si), boron (B), gallium (Ga), zinc (Zn), iron (Fe), germanium (Ge), bismuth (Bi), gold (Au), and manganese (Mn). A surface of the non-spherical particle is coated with a surfactant. The surfactant is selected from one or more of a fatty acid, an organosilicone compound, and a combination thereof. This application also relates to a dielectric composite material including the non-spherical particle, and a method for regulating dielectric properties of the composite material by using the non-spherical particle.

The present disclosure provides a process. In one embodiment, the process includes blending a broad molecular weight distribution (MWD) ethylene-based polymer having an I21 / I2 ratio of 55 to 85 with a narrow MWD ethylene-based polymer having an I21 / I2 ratio of 20 to 50. The process includes forming a blend component including 20 wt% to 45 wt% of the broad MWD ethylene-based polymer, 80 wt% to 55 wt% of the narrow MWD ethylene-based polymer, and optional carbon black. The blend component has a density of 0.925 g / cc to 0.955 g / cc and an I21 / I2 ratio of 30 to 55. The process includes extruding the blend component onto a conductor at a velocity greater than 1.02 m / sec and forming a conductor jacket having a surface smoothness of 30 μin to 80 μin.

There is provided a laminate having excellent partial discharge resistance even in a high-humidity environment and also having excellent insulating properties. A laminate comprising at least a conductor and an insulating coating, wherein the insulating coating is composed of a nanocomposite formed of a resin composition in which a metal oxide hydrate is dispersed in a resin, and wherein the metal oxide hydrate has a negative zeta potential when dispersed in N-methyl-2-pyrrolidone (NMP).

A composition for forming an insulating substrate includes 100 parts by weight of a modified liquid crystal polymer and 0.5 to 85 parts by weight of a dielectric filler. The modified liquid crystal polymer has a repeating unit structure shown in the specification, Ar is 1, 4-phenylene group, 1, 3-phenylene group, 2, 6-naphthyl or 4, 4 '-biphenylene group, Y is-O-or-NH-, and X is-O-or-NH-. And X is an amide group, an imino group, an amidino group, an aminocarbonylamino group, an aminothiocarbonyl group, an aminocarbonyloxy group, an aminosulfonyl group, an aminosulfonyloxy group, an aminosulfonylamino group, a carboxylic acid ester, a (carboxylic acid ester) amino group, a (alkoxycarbonyl) oxy group, an alkoxycarbonyl group, a hydroxyamino group, an alkoxyamino group, a cyanoxy group, an isocyanate group, or a combination thereof. The insulating substrate formed by using the composition can be applied to forming a circuit board structure. The composition can improve the dielectric constant of the insulating substrate and maintain a relatively low dielectric loss factor.

The present invention provides a dielectric material with excellent electrical properties and a method for manufacturing the same, which prevents blistering of the copper foil during the production of copper-clad laminates using the dielectric material. Furthermore, it provides a copper-clad laminate using this dielectric material and a method for manufacturing the same. [Solution] A dielectric characterized by having a residual organic matter content of 500 μg / g or less. A metal-clad laminate having the dielectric and a metal foil.

To improve a withstand voltage while facilitating manufacture.SOLUTION: A gas-insulated switchgear (1) comprises a conductor (4) held by an insulating spacer (3) in a sealed container (2) filled with an insulating gas. An insulating layer (20) is provided on the surface of the curved conductor in the conductor. The insulating layer is formed by laminating an insulating material on the surface of the curved conductor by a thermal spraying method or an aerosol deposition method. Ceramic particles (21) are used as the insulating material. The insulating layer is impregnated with an insulating resin (22).SELECTED DRAWING: Figure 2

An insulating material for a stator contains an epoxy resin, a curing agent, and a spherical inorganic filler, and is used for insulation between coils of a stator.