48results about How to "Guaranteed electrical insulation performance" patented technology

To obtain a stator of a rotary electric machine wherein electromagnetic noise can be reduced and further electrical insulating properties can be secured.A stator winding is manufactured by inserting a U-shaped conductor segment into a slot from the first end face side of a stator core, and welding ends of the conductor segments to each other exposed to the second end face side of the stator core. Joints 6 between the ends of the conductor segments are disposed circumferentially and annularly in two rows on the second end face side of the stator core. Epoxy resin is applied so that the resin covers each joint 6 and the resin bridges two adjacent joints in the radial direction and forms a first insulating layer 8. Silicone resin is applied so that the resin covers the first insulating layer 8 and extends to the insulating coating 401 of the conductor segments 4, forming a second insulating layer 9.

The invention relates to an MEMS gas sensor chip and sensor and a preparation method of the sensor, belongs to the technical field of gas detection, and solves the problems of high technical cost, long response time and low environment stability in the prior art. The MEMS gas sensor chip comprises a gas sensitive unit, a temperature sensitive unit, a sensitive structure substrate and a temperaturecontrol unit. The MEMS gas sensor comprises the MEMS gas sensor chip and a control circuit, and the control circuit further comprises a microcontroller, an N type MOSFET, a P type MOSFET and a positive-negative power supply. The microcontroller compares a practical temperature collected by the temperature sensitive unit with a preset temperature, outputs a control signal according to a comparisonresult, controls ON / OFF of the N type MOSFET and the P type MOSFET, and further controls the direction and magnitude of a current through the temperature control unit and changes the surface temperature of the sensitive structure substrate. The MEMS gas sensor is simple in operation and high in versatility, can measure the concentration of different gases simultaneously, saves the cost, and is short in response time and high in environment stability.

The invention discloses a kind of nanometer TiO 2 To prepare the anti-charge accumulation insulating oil from modified sunflower seed oil, the sunflower seed insulating oil is vacuum-dried, heated to 40-60°C, stirred for 30-60min, and modified by adding 1-4% of its mass to the sunflower seed insulating oil. Nano TiO 2 , ultrasonic oscillation is uniform, and modified sunflower oil is obtained; the modified nano-TiO 2 The preparation method is as follows: the nano-TiO 2 The particles are fully ground in a grinder, then anhydrous ethanol is added to mix, and a modifier composed of oleic acid, acrylic rosin polyoxyethylene sucrose ester and polyethylene glycol is added to the mixture for surface modification, and ethanol is washed. Drying to obtain modified nano-TiO 2 . The method of the present invention adopts nanometer titanium dioxide (TiO 2 ) Particle-modified sunflower seed insulating oil, which improves the anti-charge accumulation ability of sunflower seed insulating oil, makes the electric charge easy to dissipate and difficult to accumulate under the premise of ensuring its electrical insulation performance, and reduces the electric field distortion caused by the electric charge accumulation. , make the transformer run more safely.

The invention relates to a salt corrosion resistant and twisting resistant double-shielded communication cable for ocean wind power and a manufacturing method of the communication cable. Each stranded copper conductor is wrapped in a salt corrosion resistant and twisting resistant extruded rubber insulation layer to form an insulated core; each two insulated cores are stranded to form a twisted pair of which the gaps are filled with fillers; each twisted pair is wrapped in a twisted pair copper foil shielding layer to form a twisted-pair group; the twisted-pair groups are mutually stranded to form a cable core; and the cable core is wrapped in a low-strength non-woven fabric longitudinal wrap, an inner sheath, a cable core copper foil shielding layer and an outer sheath in sequence from inside to outside. The communication cable provided by the invention adopts the low-strength non-woven fabric longitudinal wrap which completely fits the insulated cores in shape, so that gaps between the low-strength non-woven fabric longitudinal wrap and the insulated cores are eliminated, convenience is provided for stopping flame from spreading inwards under a combustion condition and the resistance to moisture impregnation is enhanced; and meanwhile, the low-strength non-woven fabric longitudinal wrap can ensure that the sheaths are not stuck to the insulated cores, and provides convenience for stripping the sheathes in a construction process without damaging the insulated cores.

The invention relates to a salt corrosion-resistant and torsion-resistant integral shielding telecommunication cable for offshore wind power and a manufacturing method of the integral shielding telecommunication cable. Salt corrosion-resistant and torsion-resistant rubber insulating layers are uniformly extruded on the peripheries of stranded copper conductors in a wrapping way to form insulated wire cores; the insulated wire cores are stranded in pair to form pair-twist wire pairs; gaps of the pair-twist wire pairs are filled with flame-retardant non-absorbent fiber fillers; a plurality of groups of pair-twist wire pairs are stranded to form a cable core; and the periphery of the cable core is coated with a low-intensity non-woven fabric longitudinally-covered layer, an inner jacket, a copper foil polyester composite belt shielding layer and an outer jacket sequentially from the inside out. The integral shielding telecommunication cable disclosed by the invention adopts the low-intensity non-woven fabric longitudinally-covered layer of which the shape is completely in fit with that of each insulated wire core, so that gaps between the low-intensity non-woven fabric longitudinally-covered layer and the insulated wire cores are eliminated, flame can be conveniently prevented from being spread and transferred inwards under the burning condition, and resistance to impregnation of humidity can be enhanced; and meanwhile, the low-intensity non-woven fabric longitudinally-covered layer can ensure that the inner jacket and the insulated wire cores are not adhered, so that the insulated wire cores are not damaged when the inner jacket is stripped during construction.

The invention relates to a salt corrosion-resistant and torsion-resistant telecommunication cable for offshore wind power and a manufacturing method of the telecommunication cable. Salt corrosion-resistant and torsion-resistant rubber insulating layers are uniformly extruded on the peripheries of stranded copper conductors in a wrapping way to form insulated wire cores; the insulated wire cores are stranded in pair to form pair-twist wire pairs; gaps of the pair-twist wire pairs are filled with flame-retardant non-absorbent fiber fillers; pair-twist wire pairs adopt different stranding pitches, a plurality of groups of pair-twist wire pairs are stranded to form a cable core; the periphery of the cable core is coated with a low-intensity non-woven fabric longitudinally-covered layer; and a jacket is extruded on the periphery of the low-intensity non-woven fabric longitudinally-covered layer in a wrapping way. The telecommunication cable disclosed by the invention adopts the low-intensity non-woven fabric longitudinally-covered layer of which the shape is completely in fit with that of each insulated wire core, so that gaps between the low-intensity non-woven fabric longitudinally-covered layer and the insulated wire cores are eliminated, flame can be conveniently prevented from being spread and transferred inwards under the burning condition, and resistance to impregnation of humidity can be enhanced; and meanwhile, the low-intensity non-woven fabric longitudinally-covered layer can ensure that the jacket and the insulated wire cores are not adhered, so that the insulated wire cores are not damaged when the jacket is stripped during construction.

The invention discloses a transparent conductive film, which includes a transparent carrying layer and several conductive regions and several color matching regions arranged alternately on the transparent carrying layer, the conductive regions include interconnected conductive grids, and the color matching regions include In the color matching grid, there is a gap between the conductive grid and the color matching grid to insulate each other, and the grid line width of the color matching grid is larger than the grid line width of the conductive grid. The grid line widening setting of the color matching grid compensates for the decrease in the duty ratio of the color matching grid in the color matching area caused by the gap, balances the light transmittance of the conductive area and the color matching area, and ensures the visual effect of the overall appearance of the transparent conductive film .