151results about How to "Avoid insulating properties" patented technology

There is provided a multilayer ceramic electronic component, including: a ceramic body; and internal electrodes formed inside the ceramic body and having a plurality of non-electrode regions, wherein, on a cross-section taken in length and thickness directions of the ceramic body, when a thickness of the internal electrode is denoted by Te, a continuity of the internal electrode is denoted by C, an area of the internal electrode is denoted by Ae, an area of the plurality of non-electrode regions is denoted by Ao, and a maximum diameter of the non-electrode region having the maximum diameter among the plurality of non-electrode regions is denoted by Pmax, 0.1 μm≦Te≦0.5 μm, 1.1%≦Ao / Ae≦3.2%, Pmax≦120 nm, and 95%≦C≦99.5% are satisfied.

There is provided a method of connecting busbars for a capacitor and a product manufactured by the same method, whereby the inductance of the capacitor is decreased and thus the amount of heat generated in the capacitor is decreased to improve the temperature characteristics and electrical characteristics of the capacitor and the reliability of the quality of the capacitor, to consistently improve the insulation between the busbars having different polarity, and to maintain the insulation between the busbars in severe environments. The method of connecting busbars for a capacitor is characterized by coating at least parts of an N-pole busbar and a P-pole busbar, each of which has different polarity, with an insulating material; exposing parts of the N-pole and P-pole busbars outside an outer case so as to form a terminal to be connected to an other component; and connecting the N-pole busbar to the P-pole busbar in a manner that at least parts of the N-pole and P-pole is busbars overlap each other.

The invention relates to a high-voltage electric energy direct measurement system and a method, which is applied on a three-phase high-voltage circuit. The system comprises an A-phase high-voltage electric energy measurement unit arranged on the high-voltage terminal of an A-phase power line for measuring a first portion of electric energy consumption; a C-phase electric energy measurement unit arranged on the high-voltage terminal of a C-phase power line for measuring a second portion of electric energy consumption; a B-phase electric energy synthesis unit arranged on the high-voltage terminal of a B-phase power line for accumulating the first portion of and the second portion of electric energy consumption.

The invention discloses a multi-electrode electromagnetic flow meter and relates to the technology field of measurement. The flow meter comprises six electrodes arranged on the circular cross-section of a sensor conduit, the sensor conduit is perpendicular to the central axis of the conduit, wherein, four electrodes are measuring electrodes that are symmetrical about the X-axis and the Y-axis of the circular cross-section, and two electrodes are liquid collecting electrodes. Two measuring electrodes are in a group, the two liquid collecting electrodes are arranged between the two groups of measuring electrodes. The two measuring electrodes in a group are reliably connected. The two groups of measuring electrodes are respectively connected with a converter and an amplifier. The two liquid collecting electrodes are reliably connected and then connected to the metal of a measuring conduit, and serve as the basis ground of flow signals for connecting the ground terminal of the converter and the amplifier. The multi-electrode electromagnetic flow meter is characterized by small additive measuring error, convenient assembly and reliable liquid collecting reference, and can provide the reliable ground reference electrical potential.

A circuit board structure and a fabrication method of the same are disclosed according to the present invention. The circuit board structure includes: a carrier board with at least one surface formed with a circuit layer having electrically connecting pads; a first solder mask formed on the carrier board and the circuit layer and formed with first openings for exposing the electrically connecting pads; and a second solder mask formed on the first solder mask and formed with second openings for exposing the first openings and the electrically connecting pads. The first solder mask is made of a high-insulation photosensitive material characterized by presence or absence of impurities, such as microparticles, to have enhanced fluidity for being filled in the circuit layer, thereby preventing metal ions migration and subsequent metal hypha electricity discharge which might otherwise affect electrical performance, therefore the present invention is applicable to fine circuit fabrication.

The invention belongs to the technical field of electric-power equipment detection, and in particular, relates to a detection device of dissolved gases in transformer oil based on infrared spectrum absorption. The device includes a light source system unit, a sensing arrangement unit and a detection acquisition and analysis unit; the light source system unit is composed of a high-power supercontinuum broadband light source, a light source controller and a photoswitch and is used for realizing output multiplexing control of the light source; the sensing arrangement unit is formed by arranging one sensing path of fiber Bragg grating hydrogen sensor series-connection wavelength division multiplexing and the other one sensing path of hollow photonic crystal optical fiber internal spectrum absorption sensing in a cavity body of an oil-immersed power transformer; the detection acquisition and analysis unit is composed of a wavelength demodulation device, a light intensity detector and a data acquisition and analysis device, the wavelength offset and the spectral absorption intensity of fiber Bragg grating hydrogen sensors are detected, and the data acquisition and analysis device records data and types and contents of corresponding fault gases are obtained by calculation; and on the basis, insulation conditions of the transformer oil are evaluated, positioned, analyzed and forecasted.

A battery (2) includes an insulating member (40) fitted into a hole (26) in a case (20), and electrode terminals (60, 70), each being passed through the insulating member (40) and extended out of the case (20). The insulating member (40) includes: a first insulating portion (42) that isolates each of the electrode terminals (60, 70) from the inner surface of the hole (26) and closes the interface between each of the electrode terminals (60, 70) and the inner surface; and a second insulating portion (48) formed along the surface of each of the terminals (60, 70) at the outer end portion of the insulating member (40).

A stator of a rotary electric machine is composed of a cylindrical stator core and stator windings inserted into slots of the stator core. A laminated body is formed by laminating steel sheets having slots and teeth. After stator windings in a flat shape are inserted into slots of the laminated body, the laminated body is bent into a cylindrical form along rollers between which the laminated body is sandwiched. In the bending process, positions of the teeth are restrained to prevent the stator windings disposed in the slots from being damaged by movement of the teeth. Alternatively, a bump extending from each tooth is formed, so that the tooth is restrained by gripping the bump in the bending process. The bumps are removed after completion of the bending process.

The invention discloses a combined type high-voltage DC circuit breaker with a self-energizing ability, and a self-energizing strategy thereof. According to the combined type high-voltage DC circuit breaker and the self-energizing strategy thereof, a daily through-current branch of a traditional combined type high-voltage DC circuit breaker is improved, a load transfer switch is changed from the original mode of IGBT series connection to a mode of full-bridge submodule series connection, and the corresponding self-energizing strategy is designed, so that capacitors in submodules operate in an energized manner under normal working condition. The load transfer switch of the circuit breaker typology is energized by means of the capacitors of the submodules directly without the need of external power supply, the insurmountable insulation problem in engineering is avoided, and the application prospect of the circuit breaker in a high-voltage DC power grid can be improved.

The invention discloses a smart three-dimensional soaking device of a heat-not-burn cigarette, a kit and a heating method thereof. The smart three-dimensional soaking device comprises a heating assembly (1) and an exterior cigarette set shell (3); a first heating cavity (A) is formed in the portion between the cigarette set shell (3) and the heating assembly (1); a second heating cavity (B) is formed in the portion between a heating assembly shell and a combined heater (13) in the heating assembly shell; an inner cavity of a heating cylinder (132) in the combined heater (13) is a third heatingcavity (C); a heating stick (131) with a tip is arranged in the heating cylinder (132); air flow communication is achieved among the three heating cavities; the heating cylinder and the heating stickare both provided with heating circuits, the heating assembly is connected with a control circuit which comprises two temperature control loops, the heating cylinder and the heating stick are regarded as heating objects respectively for independent regulation and control, and heat energy is intelligently distributed. A three-dimensional soaking technology provides all-directional combined even heating of the circumferential surface and the core part for the heat-not-burn cigarette, so that the taste of the cigarette is close to that of a traditional cigarette, and harm is also reduced.

The invention discloses a combined high voltage DC circuit breaker with DC power flow control and a control strategy thereof. The daily flow passage branch of the traditional combined high voltage DC circuit breaker is improved, a load transfer switch is changed from the original IGBT series into the full bridge sub-module series, and an overvoltage energy drain branch is additional provided. The invention controls the size of the positive resistance effect in the branch by controlling the frequency of the load transfer switch sub-module capacitor, so as to realize the purpose of the power flow control. Compared with the prior art, the load transfer switch of the circuit breaker topology of the invention has the dual function of the circuit breaker and the power flow controller, so as to reduce the repeated investment and reduce the construction cost of the power grid. In addition, the IGBT obtains power directly from the sub-module capacitor thereof while the external power supply is not required, the insulation problem difficult to solve in the project is avoided, and the application prospect in the high voltage DC power grid is enhanced.

An electronic touchscreen operative glove, providing a conductive path from the skin to the exterior of the glove, so one need not remove the present glove to operate a touchscreen. The conductive path can be provided from the skin to one or more conductive panels on the tips of one or more finger and / or thumb of the glove. The glove can include one or more layers, preferably an inner and outer layer, the inner layer being weatherproof, and the outer layer forming the exterior of the glove, and having the conductive panels that can operate a touchscreen.

The invention discloses an ultra-smooth semi-conductive shielding material for a high-voltage direct-current cable, wherein the ultra-smooth semi-conductive shielding material comprises 80-100 parts of polyethylene, 0-20 parts of an ethylene-vinyl acetate copolymer, 5-15 parts of superconductive carbon black, 1-2.5 parts of a cross-linking agent, and 0.1-0.5 part of an antioxygen. A semi-conductive shielding layer prepared from the ultra-smooth semi-conductive shielding material is capable of effectively outputting current and also has an ultra-smooth surface characteristic. The ultra-smooth semi-conductive shielding material has steady performance and can play roles of well uniformizing an electric field, preventing the partial discharge or insulation breakdown problem of the semi-conductive shielding layer resulted from serious electric-field concentration possibly caused by surface defects, inhibiting space charge accumulation in a cable insulation material, and reducing the conductivity of the cable insulation material.

The invention discloses a varnished wire take-up machine, and belongs to the field of cable production equipment. The take-up machine comprises a guide wheel, a traction wheel and a take-up disc. The guide wheel is located above the front portion of the traction wheel, and the take-up disc is located below the front portion of the traction wheel; a varnished wire is sequentially wound around the guide wheel and the traction wheel to be connected with the take-up disc; a belt rotating mechanism for compressing the varnished wire is arranged on the outer side of the traction wheel, and the belt rotating mechanism is tightly attached to the traction wheel; and the take-up disc and the traction wheel are connected with a driving mechanism. Through cooperation of the guide wheel, the traction wheel and a belt, the varnished wire is compressed and collected and is prevented from being directly drawn; stress of the varnished wire is greatly reduced, and the phenomena that the varnished wire is scratched, and an insulation layer is damaged are effectively avoided; the varnished wire is compressed through the belt, the contact area among the traction wheel, the belt and the varnished wire is greatly increased, and the wire take-up process is more stable and reliable; and compressing is carried out through the belt, and the insulation layer of the varnished wire is protected better.

A circuit board structure and a fabrication method of the same are disclosed according to the present invention. The circuit board structure includes: a carrier board with at least one surface formed with a circuit layer having electrically connecting pads; a first solder mask formed on the carrier board and the circuit layer and formed with first openings for exposing the electrically connecting pads; and a second solder mask formed on the first solder mask and formed with second openings for exposing the first openings and the electrically connecting pads. The first solder mask is made of a high-insulation photosensitive material characterized by presence or absence of impurities, such as microparticles, to have enhanced fluidity for being filled in the circuit layer, thereby preventing metal ions migration and subsequent metal hypha electricity discharge which might otherwise affect electrical performance, therefore the present invention is applicable to fine circuit fabrication.

An electric rotating machine includes a stator, a rotor, and a housing. The stator includes a stator core and a stator coil formed by laminating magnetic steel sheets. Each of the magnetic steel sheets has through-holes that are formed to penetrate the magnetic steel sheet in the axial direction of the stator core. All of the magnetic steel sheets are divided into groups each of which includes axially-adjacent n of the magnetic steel sheets, where n is an integer not less than 2. For each of the groups, corresponding n of the through-holes of the n magnetic steel sheets of the group communicate with one other to form an inside coolant passage. The inside coolant passage fluidically connects an outside coolant passage, which is formed between the housing and the radially outer surface of the stator core, with a corresponding one of the slots of the stator core.

A stator includes a stator coil comprised of electric wires each of which has in-slot portions received in slots of a stator core and turn portions located outside the slots to connect the in-slot portions. Each of the turn portions is stepped to have parallel parts that extend substantially parallel to a corresponding axial end face of the stator core. For each pair of the turn portions of the electric wires, which respectively protrude out of an adjacent pair of the slots of the stator core, the parallel parts of one of the turn portions overlap those of the other in the axial direction of the stator core. A clearance provided between one of the overlapping pairs of the parallel parts, which is positioned furthest from the corresponding axial end face of the stator core, is largest among all clearances provided between the overlapping pairs of the parallel parts.

The invention relates to a maglev traction device of a high-temperature superconducting high-speed maglev train, and belongs to the technical field of intelligent devices. The traction device comprises a high-temperature superconducting maglev device and a traction power device; the high-temperature superconducting magnetic levitation device comprises vehicle body rail holding frames installed onthe left side and the right side of a vehicle body bogie, magnetic conductive rails installed on ground rails on the left side and the right side, a feedback control system, an air gap position detection controller, high-temperature superconducting electromagnets and guide electromagnets, wherein the high-temperature superconducting electromagnets and the guide electromagnets are installed on thevehicle body rail holding frames respectively. The traction power device comprises an iron-core-free long-stator permanent magnet synchronous linear motor which comprises two stators, two rotors and two installation supports. Each stator is vertically installed in the center of a ground track, and each rotor is vertically installed between the two sides of the two stators and installed on a bogieof a vehicle body. The problems of large coil volume and weight, serious heating and easy insulation aging in a traditional magnetic suspension structure are avoided, and the structure of a magnetic suspension system is simplified.

The invention discloses a multi-directional paying-off tackle applicable to the technical field of electric mounting. The tackle comprises a support and a roller disposed on the support through a roller shaft. The support comprises a lower fixing plate, a first side plate and a second side plate, wherein the first side plate and the second side plate are vertically disposed on two sides of the lower fixing plate, the top ends of the first side plate and the second side plate are connected through a crossbeam, the roller shaft vertical to the two side plates are disposed between the middles of the two side plates, two sides, located on the side plates, of the lower fixing plate are symmetrically provided with four iron pins, a nylon turning bar is sleeved on each iron pin, the second side plate includes a support plate fixed on the lower fixing plate and a movable plate capable of being opened and closed, and a locking mechanism for locking the movable plate is disposed on the outer side of the same. The multi-directional paying-off tackle has the advantages that the tackle is capable of smoothly paying-off in corner paying-off paths, procedures such as wire breaking and connecting can be avoided, work load of operators is reduced, wire connecting points are reduced, potential safety hazard is reduced, and safety performance of an electric system is increased.

The invention, which belongs to the technical field of the semiconductor manufacturing, provides a plasma etching machine comprising a reaction cavity. An ion generation electrode is arranged in the reaction cavity; a support frame is arranged on the ion generation electrode to support a to-be-processed workpiece; and a mounting hole is formed in the support frame. A screw hole is formed in a region, corresponding to the mounting hole, of the ion generation electrode. The mounting hole and the screw hole are connected by a bolt. A sealing unit is arranged on the bolt at the axial direction of the bolt and is used for sealing the mounting hole. According to the plasma etching machine, a plasma on the support frame can be prevented from entering the screw hole of the ion generation electrode effectively for long time, thereby avoiding damages of the ion generation electrode by the plasma.

The invention provides a Mini LED chip and a manufacturing method thereof. The first auxiliary extension electrodes are located between the first type semiconductor layer and the first bonding electrodes and are not connected through the corresponding auxiliary extension electrodes. That is to say, no auxiliary extension electrode is manufactured on the surface of the exposed first-type semiconductor layer at the electrode contact hollowed-out part, so that the problem that the area occupied by the electrode contact hollowed-out part is enlarged due to the existence of the auxiliary extensionelectrode is avoided, the area of a light-emitting region is large, and the light-emitting efficiency of the Mini LED chip is improved. Further, according to the technical scheme provided by the invention, an auxiliary extension electrode does not need to be manufactured; therefore, the problems that the flatness of the prepared first bonding electrode is poor and the coverage effect of the insulation isolation reflection layer is poor due to the existence of the auxiliary expansion electrode are avoided, the reliability of the Mini LED chip is improved, and the light-emitting angle of the Mini LED chip is ensured to achieve an expected effect at the same time.

The invention discloses a wind tunnel test putting device and a put object model design method thereof. The device comprises a putting hanging frame, which is fixedly provided with a spring, wherein one end of the spring is connected with a model hook, a hook rotating shaft is fixedly arranged on the putting hanging frame, and the model hook is rotationally connected with the hook rotating shaft; a T-shaped inclined joint, which is provided with a T-shaped inclined joint rotating shaft, wherein the T-shaped inclined joint is connected with the model hook through the T-shaped inclined joint rotating shaft; a connector lug I, which is connected to the end part of the T-shaped inclined joint, wherein the end part of the connector lug I is connected with a constantan wire; a connector lug II, wherein the constantan wire is connected between the connector lug I and the connector lug II, and the connector lug II is connected with a cross-shaped connecting block; a sliding block, which is arranged on the putting hanging frame in a sliding manner; a distance adjusting screw, which is connected with the sliding block, wherein the connector lug I and the connector lug II are connected with a power lead; and a putting object model, which is hung on the model hook. According to the invention, the putting of an external store model in a wind tunnel putting test is rapidly, efficiently and stably realized, and the efficiency of the wind tunnel test is improved.

The invention discloses a manufacture method for a COB packaged optoelectronic chip with side protection. According to the manufacture method, a COB packaged optoelectronic chip can be obtained through the cutting of a wafer optoelectronic device, the insulating treatment of a side surface, COB package, electrode connection and finished product cutting. Two side surfaces of the COB packaged optoelectronic chip manufactured by the method of the invention are protected by an insulating adhesive, and therefore, it can be ensured that conductive silver paste does not contact the silicon of the side surfaces of the chip, a condition that a front electrode and the back electrode of the chip are short circuited can be prevented. The method is simple in process, can realize automatic production, can greatly reduce product cost, and has a very bright market application prospect.

The invention discloses a high-voltage static cooking fume removing device. The high-voltage static cooking fume removing device comprises an insulation shell, an ionization module and a dust collection module, wherein the ionization module and the dust collection module are arranged in the shell and comprise high-voltage polar plates and grounding polar plates, and the high-voltage polar plates and the grounding polar plates are arranged in a crossed manner. The high-voltage static cooking fume removing device is characterized in that the ends of the high-voltage polar plates are bent to form first flanges, and the ends of the grounding polar plates are bent to form second flanges; the high-voltage static cooking fume removing device further comprises a plurality of pressing buckle structures connected with the first flanges and the second flanges at all ends; the pressing buckle structures comprise installation frames and pressing strips, wherein arched insertion strips are arranged on the surfaces, facing the first flanges or the second flanges, of the installation frames, gaps allowing the first flanges or the second flanges to be inserted into are formed between the insertion strips and the surfaces, and insertion holes are formed in the positions, adjacent to the insertion strips, on the installation frames; and pressing connecting pieces are arranged at the positions, corresponding to the insertion holes, on the pressing strips, penetrate the insertion holes and then abut against the back sides of the ends of the high-voltage polar plates or low-voltage polar plates.

The invention provides a semi-conductive polyolefin shielding material for a high-voltage direct-current cable. The semi-conductive polyolefin shielding material comprises the following components in parts by mass: 100 parts of LDPE (low-density polyethylene), 1-2 parts of CPE (chlorinated polyethylene), 0.5-1.5 parts of BaTiO3, 8-15 parts of conductive potassium titanate whisker, 0.2-0.6 parts of stearic acid, 1-2.5 parts of cross-linking agent and 0.1-0.5 part of antioxidant. The semi-conductive polyolefin shielding material prepared from the components has the characteristic of ultra-smooth surface, and is good in physical performance and excellent in comprehensive performance. The current can be effectively conducted, a good effect of homogenizing an electric field is achieved, and the problem of partial discharge or insulation breakdown caused by serious electric field concentration probably brought by the surface defect of a semi-conductive shielding layer is solved. By attracting an ionized charge and an injected charge into a deep trap, the charges are prevented from being accumulated in a partial area, so that space charge accumulation in a cable insulation material is suppressed, and the electric conductivity of the cable insulation material is reduced.

A wiring structure includes a first wiring having a first wiring width, and a second wiring formed in the same layer as a layer in which the first wiring is formed, and having a second wiring width greater than the first wiring width. The second wiring is electrically connected to the first wiring. Both of the first and second wirings are composed of copper or an alloy predominantly containing copper therein. The first and second wirings have the same thickness as each other. A ratio of an area of the second wiring to an area of the first wiring is N:1 where N is equal to or greater than 2,000 and equal to or smaller than 200,000,000 (2,000≦N≦200,000,000).

The invention discloses a steady-state energy-supplementation control strategy of hybrid high voltage DC circuit breaker. According to the invention, through a reasonable switch action time sequence, capacitor voltage of an improved full-bridge sub module can be made to fluctuate within a manually set threshold value range, so that energy stability is ensured and influence on power supply reliability of a drive circuit of the full-bridge sub module due to violent fluctuation of the capacitor voltage is prevented. Besides, since a load transfer switch and a main circuit breaker get energy through capacitors of sub modules of themselves respectively, external power supply is not needed, so that problems of insulation of voltage resistance in projects are avoided; design, manufacture and construction difficulties are reduced; and application of the circuit breaker typology in a high voltage DC power grid is facilitated.

A terminal block for electrically connecting a plurality of first wires connected to an electric motor and a plurality of second wires connected to a power conversion device for supplying drive power of the electric motor includes a case, a plurality of terminals housed in the case and configured to connect the plurality of first wires and the plurality of second wires to each other, a partition wall provided between the plurality of terminals to electrically isolate the plurality of terminals from each other, and plate-like members provided between the partition wall and the terminals and made of a material with a higher elasticity than the case and the partition wall.

The invention discloses a start-up control strategy for a hybrid high-voltage DC circuit breaker. The control strategy enables the hybrid high-voltage DC circuit breaker to be smoothly started through a reasonable switching sequence. External power supply is not required because a load transfer switch and a main circuit breaker directly take power through respective submodule capacitors, thereby avoiding problems of insulation and withstand voltage which are difficult to solve in engineering, reducing the design, manufacturing and construction difficulty, and being conducive to application of the circuit breaker topology in a high-voltage DC power grid. Meanwhile, the start-up process of the hybrid high-voltage DC circuit breaker is smooth, the impact for the power grid is small, and no influence is generated for stable running of the power grid.

A virtual grounding transmission and distribution system is charactered in that a virtual grounding transformer is set up in the system. Three phases of its primary side are respectively connected in the corresponding lines of the system; the three phases of the secondary side are connected in series, wherein openings are disposed between any one of those neighboring two-phase windings; the formation of the virtual grounding is by bridging impedance at both ends of the openings, or directly shorts the openings to form a triangle connection at the secondary side of the virtual grounding transformer. The invention provides a virtual grounding manner for a neutral point non-grounding system, which can quickly consume the charge stored in the capacitance relative to the grounding, thus effectively preventing the over-voltage in the restoration process of the fault phase and the sound phase to a normal grounding voltage, preventing the ferromagnetic resonant, while at the same time delaying the restoration speed of the fault voltage relative to grounding, which is propitious to not re-ignite.