108results about How to "Ensure electrical insulation" patented technology

Provided is an armature for an electric rotating machine wherein the eddy current loss can be reduced while enhancing the space factor of coil. The present invention relates to an armature (2) for an electric rotating machine including a cylindrical core (11) where a plurality of slots (12) extending in the axial direction are positioned in a dispersion manner in the circumferential direction, and a coil (21) wound in the slots (12) each of which is formed in such a manner that the circumferential width of the inner circumferential opening of the slot (12) is narrower than the inner circumferential width of the slot, the circumferential width of a linear conductor constituting the coil is wider than the circumferential width of the inner circumferential opening, the coil end (23) of the coil (21) on one side in the axial direction thereof is a bent coil end (24); which is bent radially inward and provided with a radial conductor (25), and at a radial position in the radial conductor (25) corresponding to the inner circumferential opening, a narrow recess (32) which is recessed for other portion of the radial conductor (25) is provided so that the circumferential width becomes narrower than that of the inner circumferential opening.

The invention discloses a high-heat-conductivity low-viscosity epoxy resin composite, and a preparation method thereof. The epoxy resin composite comprises, by volume, 25 to 60 parts of a first spherical heat-conducting filling material, 5 to 30 parts of a second spherical heat-conducting filling material and 30 to 70 parts of epoxy resin, wherein the median particle diameter of the first spherical heat-conducting filling material is no less than 30 [mu]m, and the median particle diameter of the second spherical heat-conducting filling material is no more than 20 [mu]m. The preparation method comprises the following steps: (1) subjecting the spherical heat-conducting filling materials to vacuum drying, then successively adding epoxy resin, a curing agent and the spherical heat-conducting filling materials into a planetary centrifugal mixer and carrying out mixing and defoaming; and (2) carrying out vacuum pumping and bubble removing and then carrying out curing molding. The invention has the advantages that the spherical heat-conducting filling materials with different particle sizes and proportions are used for compounding with the epoxy resin, so the filling density of the filling materials is improved, friction between the filling materials and between the filling materials and a matrix is reduced, and the processing flowing performance of the composite is obviously improved.

The invention discloses anti-icing coating for the surface of an ultra-high voltage transmission line. The anti-icing coating for the surface of the ultra-high voltage transmission line is prepared from the following raw materials in parts by weight: 45-60 parts of fluorosilicon resin, 5-10 parts of functional nano ions, 5-8 parts of TiO2, 8-12 parts of nano SiO2, 0.5-1 part of an emulsifying agent, 0.5-1 part of a defoaming agent, 0.3-1 part of a flatting agent, 1-2 parts of a silane coupling agent and 20-30 parts of a solvent. The prepared anti-icing coating for the surface of the ultra-high voltage transmission line has the advantages that a contact angle with water is 128-168 degrees; compared with the condition that no anti-icing coating is coated, vertical adhesive force between a coating coated with the anti-icing coating and ice is reduced by 76-91.5%; and the anti-icing coating for the surface of the ultra-high voltage transmission line has good electric heating effect, average temperature rise is 10.8-16.5 DEG C, and the anti-icing coating for the surface of the ultra-high voltage transmission line also has good acid resistance, alkali resistance and insulating properties.

A thermoelectric conversion module comprising an inexpensive good thermal conductivity substrate in which electric insulation is secured between the good thermal conductivity substrate and an electrode. A thermoelectric conversion element consists of a P type semiconductor (1) and an N type semiconductor (2) connected in a shape of pi. Electrodes (3-5) are connected with the both end faces of the thermoelectric conversion element. Good thermal conductivity substrates (8, 9) abut against the electrodes (3-5). The good thermal conductivity substrates (8, 9) are composed of aluminium or an aluminium alloy and an anodic oxidation film (10) is provided between the good thermal conductivity substrates (8, 9) and the electrodes (3-5). The thermoelectric conversion module (20) comprises the good thermal conductivity substrates (8, 9) composed of inexpensive aluminium or aluminium alloy and can secure electric insulation between the anodic oxidation film (10) and the good thermal conductivity substrate.

The invention discloses a flame-retardant power cable which comprises a wire, a high-temperature-resistant insulation layer coated on the wire, a shielding layer coated on the high-temperature-resistant insulation layer and a protective layer coated on the shielding layer. The protective layer is prepared from the following raw materials in parts by weight: 40-60 parts of silicon rubber, 40-60 parts of ethylene propylene diene monomer rubber, 20-25 parts of modified carbon fiber, 30-50 parts of nano kaolin, 1-3 parts of trioctyl trimellitate, 2-4 parts of epoxy soybean oil, 15-25 parts of microcapsulated red phosphorus, 10-15 parts of melamine, 1-3 parts of Si69, 0.5-1 part of dicumyl peroxide, 0.5-1 part of di-tert-butyl peroxide, 0.4-0.6 part of accelerator TMTD, 0.3-0.5 part of accelerator BZ, 2-4 parts of Ca/Zn composite stabilizer, 1-2 parts of butyl tin mercaptide, 0.4-0.6 part of antioxidant 1076, 0.2-0.3 part of anti-aging agent and 2-4 parts of silicone powder.

The invention discloses a battery pack device. The battery pack device comprises a plurality of basic parallel units, heat radiators, bus bars and insulation parts, wherein the bus bars are positioned between the heat radiators and the multiple basic parallel units, and are connected by screws of the heat radiators; pole lugs of the basic parallel units are connected in parallel by the bus bars; each basic parallel unit comprises a voltage collecting terminal; the insulation parts comprise first insulation parts, second insulation parts and third insulation parts; each first insulation part is fixedly arranged between each bus bar and the corresponding heat radiator through the screw of the heat radiator; each second insulation part is positioned around the screw of the corresponding heat radiator; each third insulation part is positioned at the boundary, corresponding to the voltage collecting terminal, of the corresponding heat radiator. The battery pack device has the advantages that when the heat is transferred by the pole lugs, the problem of electric insulation between the heat radiators and the basic parallel units is reliably solved, and the safety in use is improved.

Provided is a connecting structure for a vacuum pump, which can block propagation of electrical noise, generated by a main body of the vacuum pump. Between both ends of a connection piping for connecting the vacuum pump to a vacuum chamber of an apparatus to be connected with and evacuated by the vacuum pump, there is interposedly provided an electrical insulating portion formed of an insulating material so as to provide electrical insulation therebetween. The electrical insulation portion may be provided to a connection piping member such as a damper (or a valve depending on the connection arrangement) for absorbing mechanical vibrations.

To form each receiving roller with an inexpensive metal material easy to purchase and to compose a heating device with a structure capable of preventing spark between workpiece receiving rollers for providing long-term durability, in a heating device of a metal tube body for induction-heating the total length of a workpiece while rotatably supporting it with two receiving rollers. This metal tube body heating device 40 is equipped with: the receiving rollers 50 and 60 for mounting the metal tube body 10 in a manner capable of horizontally and rotatably transmitting it; roller driving devices 25-26 for rotatably driving them by pivoting them; and induction heating devices 21-22 for induction-heating the total length of the metal tube body 10. The rollers 50 and 60 are composed of: metallic core members 51 and 61; a plurality of metallic short sleeves 52 and 62 each having an axially split form; and spacers 53 and 63 serving as mutual insulation thereof.

The invention provides a plasma sealing structure for a discharge chamber of an annular magnetic steel ring cutting field ion thruster. The plasma sealing structure comprises a ceramic ring, a shielding cover and a Z-shaped sealing ring; peripheral equipment comprises a grid assembly, an anode, an insulation supporting assembly and a supporting ring of the ion thruster, and the anode is of a stepped cylinder structure and comprises a large-diameter cylinder and a small-diameter cylinder; the shielding cover is installed on the outer wall of the upper end of the small-diameter cylinder of the anode, the ceramic ring is located below the shielding cover and fixed to the end face between the large-diameter cylinder and the small-diameter cylinder of the anode, and the shielding cover shieldspart of the end face of the ceramic ring and the inner wall face of the ceramic ring to realize shielding and realize electric insulation between the anode and the grid assembly; and the horizontal end face of one side of the Z-shaped sealing ring is fixed to the bottom face of the grid assembly, and the horizontal end face of the other side is compressed at the top end of the ceramic ring to complete plasma sealing of the discharge chamber. The problems of electric insulation between the grid assembly and the anode of the ion thruster in a long-term plasma environment and plasma sealing of the discharge chamber are solved.

The invention relates to a production method of thin prepreg with a high-content filler adhesive system, comprising the following steps: step 1, providing an electronic-grade fiberglass flat cloth, wherein the nominal mass per unit of the electronic-grade fiberglass flat cloth is 15-50g/m<2>, and the weft clearance area is 0-0.01mm<2>; step 2, preparing a resin adhesive solution containing a high-content filler, wherein the filler accounts for 15-60% by weight; and step 3, impregnating the electronic-grade fiberglass flat cloth in the resin adhesive solution containing a high-content filler, and baking to obtain the thin prepreg with a high-content filler adhesive system. The production method of the thin prepreg with a high-content filler adhesive system provided by the invention effectively solves the apparent pinhole defect of the thin prepreg, improves the percent of pass, and ensures the electrical property and reliability of a copper-clad plate made from the thin prepreg, thereby ensuring the electrical insulation property of a printed circuit board (PCB) and improving the quality of products.

A metallic oxide semiconductor thin film transistor comprises a grid electrode, a grid electrode insulating layer and a metallic oxide semiconductor layer. The grid electrode insulating layer is located between the grid electrode and the metallic oxide semiconductor layer. The grid electrode insulating layer comprises a silicon oxynitride layer and a silicon oxide layer. The silicon oxynitride layer is located between the grid electrode and the silicon oxide layer. The silicon oxide layer is located between the silicon oxynitride layer and the metallic oxide semiconductor layer. The silicon oxide layer is provided with a first surface making contact with the silicon oxynitride layer and a second surface making contact with the metallic oxide semiconductor layer. The density of oxygen atoms, close to the second surface, of the silicon oxide layer is larger than the density of oxygen atoms, close to the first surface, of the silicon oxide layer. According to the metallic oxide semiconductor thin film transistor, the process time is shortened, the problem that a glass substrate can be easily broken due to the excessively large film forming stress is effectively solved at the same time, and the metallic oxide semiconductor thin film transistor is beneficial for reducing influences of the grid electrode insulating layer on the oxygen content in the metallic oxide semiconductor layer.

The invention provides a silicon controlled thyristor micro slot group composite phase change integrated cooling heat dissipation method and device, relating to the heat dissipation technology. The method includes that micro dimension composite phase change heat transfer characteristic of thin liquid film evaporation and thick liquid film boiling of liquid in open composite phase change micro slot group in a micro slot group composite phase change heat remover is utilized to remove heat. The device is provided with a micro slot group composite phase change heat remover at the two sides of single silicon controlled thyristor respectively, the silicon controlled thyristor removes heat in multiple groups, each group is provided with a wall type condenser heat dissipation structure, heat emitted by each silicon controlled thyristor can be taken out respectively and is carried into the wall type condenser by steam, condensation heat dissipation is carried out in condensation micro slot thereof, heat is taken away by external cooling water or air, condensed liquid reflows to the micro slot group composite phase change heat remover, and heat dissipation of silicon controlled thyristor with high power, large quantity and strong electric field is realized. The invention is safe and reliable, has small area, high heat-flow density, strong temperature control capability, high efficiency and low energy consumption and can be applicable to integrated cooling heat dissipation of a plurality of high power heat-emitting silicon controlled thyristors.

The invention provides a soldering flux composition with abietate for soldering and a soldering paste composition, wherein crack does not easily occur on soldering flux residue on condition that the soldering flux composition with the abietate is exposed in an intensive cold-and-heat cycle for a long time. A rosin derivative compound is obtained through dehydration condensation between (A) a rosin carboxyl-containing resin and (b-1), (b-2) or (b-3); wherein (b-1) is a dimer acid derivative flexible alcohol compound; in the formula (1), D is a dimer-acid-derived aliphatic chain, and n is 1-3; (b-2) is a dimer acid derivative flexible alcohol compound which is obtained through dehydration condensation between the dimer acid and the compound of the formula (1); (b-3) is a dimer acid derivative flexible alcohol compound which is obtained through dehydration condensation between the dimer acid and the compound of the formula (2); and in the formula (2), R represents an alkyl connecting group with 2-10 carbon atoms and comprises a straight-chain or branched-chain structure, and additionally, n2 is 1-10.

The invention discloses a pollution-free heating tube device of a vertical vacuum ion film plating machine. The pollution-free heating tube device comprises a heating tube assembly, a corrugated tube assembly, a corrugated tube supporting seat assembly and a lifting mechanism, wherein the heating tube assembly comprises heating tubes, the upper ends of the heating tubes are insulating conducting wire lead-out ends, heating tube flanges are slightly below the heating tubes and are downwardly connected with the corrugated tube assembly, the corrugated tube assembly is downwardly connected with the corrugated tube supporting seat assembly, the corrugated tube supporting seat assembly is downwardly communicated with a furnace through heating tube access ports formed in a top plate of a furnace body, and the heating tubes penetrate through the hollow internal cavities of the corrugated tube assembly and corrugated tube supporting seat assembly, extend into the heating tube access ports in the top plate of the furnace body, enter the furnace and are connected with the lifting mechanism through the heating tube flanges. The heating tubes are not located in a film plating room during film plating, and then, plated layers cannot be attached and remained onto the heating tubes, so that the problem of secondary pollution caused by the heating tubes is solved; the pollution-free heating tube device has the advantages that the structure is simple and compact, and the work of heating tube cleaning is avoided, the quality of the plated layers is improved, the work efficiency is increased, and the production cost is reduced.

The invention provide a radiation-sensitive composition that excels in electrical properties, being free from any film thickness decrease and developed film detachment at the time of development and that even after heating at high temperature, exhibits high shape retention capability and transparency, also excelling in chemical resistance. Provide is a laminate having a resin film of this radiation-sensitive composition superimposed on a basal plate; and a process for producing the laminate. There is provided a radiation-sensitive composition comprising a polymer having a polar group reactive with an epoxy group, a crosslinking agent containing a polyepoxy compound which has an alicyclic structure in its main chain skeleton and has three or more epoxy groups, and a radiation-sensitive compound. Further, there is provided a laminate comprising a basal plate and a resin film of this crosslinkable resin composition.

The invention discloses a glass fiber/carbon nanotube co-modified epoxy composite. The composite is composed of, on the basis of 100 g of epoxy resin, 0.2 g of carbon nanotubes, 10-40 g of glass fibers, 80 g of a curing agent, 0.1 g of an accelerator and 20 g of a coupling agent. The glass fiber/carbon nanotube co-modified epoxy composite has both electrical isolation properties and improved thermal conductivity. The invention also discloses a preparation method for the glass fiber/carbon nanotube co-modified epoxy composite.

The present invention relates to a round cell battery, comprising a) a plurality of round cells (7) arranged next to each other, b) at least one dissipation element (14), which is electrically insulated with respect to the round cells (7) and has a rod-shaped configuration and is bent such that it runs in a zigzag-shaped manner alternately along the lower side (5), an adjoining lateral wall and an upper side (4) of the round cells (7), thereby interconnecting a group of round cells (7) in a thermally conductive manner for the dissipation of heat, and c) a electrically insulating, thermally conductive and rubber-elastic thermoplastic elastomer, which is arranged at least partially between the at least one dissipation element (14) and the round cells (7) in order to insulate the dissipation elements (14) electrically from the round cells (7) and to dissipate heat from the round cells (7) to the dissipation elements (14), exhibits good thermal conductivity from the round cells (7) to the dissipation elements (14).

The invention provides an environment-friendly flame retardant composite filling reinforced polyamide 66 resin composition, which consists of a mixture. The mixture consists of the following compositions by weight percentage: 40 to 67 percent of nylon 66, 12 to 25 percent of red phosphorus master batch, 1 to 10 percent of compatilizer, 10 to 20 percent of glass fiber, 10 to 20 percent of talcum powder, 0.1 to 1 percent of antioxidant, and 0.1 to 1 percent of lubricant. The flame retardant polyamide composition has high-efficiency flame retardant performance with flame retardant rating reaching V0 grade of UL94 standard, greatly improves rigidity and heat resistance of nylon with good dimension stability, and belongs to an environment-friendly product. The environment-friendly flame retardant composite filling reinforced polyamide 66 resin composition is applicable to injection molding of electronic equipment and household appliances with various environment-friendly and flame retardant requirements.

An antenna array (20) with at least one dipole-type emitter arrangement (1), wherein the at least one dipole-type emitter arrangement (1) comprises two pairs (2, 3) of emitter halves (2a, 2b, 3a, 3b),which transmit and/or receive on two polarization planes (4a, 4b) that are perpendicular to one another. The emitter halves (2a, 2b, 3a, 3b) can be or are arranged on an emitter plane (5) at a distance from a reflector (6) and run parallel to said reflector. Two electrically conductive partial circumferential frames (15a, 15b, 15c) are provided, which are disposed between the emitter plane (5) and the reflector (6) at a distance from one another, wherein the at least two electrically conductive partial circumferential frames (15a, 15b, 15c) define one opening (17). The at least two partial circumferential frames (15a, 15b, 15c) are oriented parallel to the emitter plane (5). Each of the two partial circumferential frames (15a, 15b, 15c) comprises at least one gap (16), which extends through the entire width of the partial circumferential frame (15a, 15b, 15c), so that each partial circumferential frame (15a, 15b, 15c) comprises at least two ends.

The invention discloses a low-temperature electrical resistivity test apparatus which is connected with an external cold source and used for measuring the electrical resistivity of a sample to be tested at a low temperature. The low-temperature electrical resistivity measuring apparatus is characterized by comprising a heat sink, a sample frame, at least two probes, an insulation frame, a positioning pressure plate, an insulation pressing ring, a fixed bolt and a reinforcing pressure plate. The invention also discloses a test method of the low-temperature electrical resistivity measuring apparatus. By adopting the low-temperature electrical resistivity measuring apparatus, an electrode can be accurately positioned, the accuracy for measuring the electrical resistivity can be effectively ensured, the sample to be tested can be reliably fixed, the completeness can be ensured, and the application prospect is wide.

The invention aims to provide an inductor preventing welding pin formation on a side face when welding with a welding pad and a manufacturing method of the inductor. The inductor is provided with a coil; a magnetic iron core (11) inside provided with the coil; a terminal (13) led from a side face (11a) of the magnetic coil from the lower surface (11b) of the magnetic iron core. The coil is formed by coiling a covering conductor covering the outer peripheral surface of the conductor (15) in an insulating manner. The covering conductor (17) serving as a terminal (13) is led from the coil towards the side face of the magnetic iron core and the lower surface of the magnetic iron core. And the covering part (16) of the lower surface (15a) of the conductor is stripped off in a condition that the covering part (16) having electric insulation performance remains on the upper surface (15b) of the conductor arranged opposite to the magnetic iron core in a position of the lower surface of the magnetic iron core, so that the conductor (15) is exposed and an electrode face (40) is formed.