418results about How to "Uniform electric field" patented technology

An electrosurgical system for sealing vessels using capacitive (RF) dielectric heating and a method thereof are provided. The system includes an electrosurgical instrument having an end effector with parallel plate electrodes that will clamp onto a vessel and maintain a specified gap distance; however, the electrodes will be coated with a non-conductive dielectric material. Such an end effector will ensure that direct conduction between the electrodes does not occur through tissue or fluids and effectively creates a parallel plate capacitor with a dielectric, e.g., tissue and coating, in between the plates. The electrosurgical instrument will be activated with an AC signal at a specified RF frequency, e.g., a Debye resonance frequency, via an electrosurgical generator. An effective AC current will flow through the tissue and cause heating due to fictional losses from rotating polar molecules in the tissue.

The invention relates to continuous high efficiency nano spinning solution (15), a nanofiber nonwovens manufacturing method and a manufacturing device which not only has high manufacturing efficiency but form better thickness of the nanofiber nonwovens. The manufacturing device comprises a solution supply system, a solution feeding pipe (8), a connecting mechanism and a metal roller (6); a metal strainer (10) and a fiber receiving web (11) which have the same shaft with the metal roller are sequentially arranged on the outside of the metal roller (6), an unreel roller (12) and a winding roller (13) are arranged on the fiber receiving web (11), and pores (7) are cut on the hollow metal roller (6). The manufacturing method includes the steps: (1), polymer spinning solution (15) is prepared; (2), an electric field is arranged between the metal roller (6) and metal strainer (10); (3), the metal roller (6) is revolved at a certain speed; (4) a measuring pump (4) is led to the metal roller (6) for even internal inputting; (5), the nanofiber is received. The invention is good for the scale manufacturing of static spinning.

A display device has an emitting region constituted by a plurality of first electrodes provided on a substrate and extending in parallel, a plurality of second electrodes provided on the first electrodes and extending substantially perpendicularly to the first electrodes, and a plurality of emission sites for emitting electrons or light respectively connected to a plurality of intersections between the first and second electrodes and arranged on the substrate and has a peripheral region surrounding the emitting region on the substrate. In this display device, first and second groups of external repeating terminals for the first and second electrodes are collectively provided side by side in a part of the peripheral region.

A display device includes a backside and a front-side substrates facing each other with a vacuum space therebetween; and a plurality of electron emission sites provided on the backside substrate. Each electron emission sites includes a bottom electrode formed on a surface of the backside substrate proximate to the vacuum space, an insulator layer formed over the bottom electrode, and a top electrode formed on the insulator layer and arranged individually apart from each other and facing the vacuum space. The display device also includes a plurality of bus electrodes for electrically connecting the neighboring top electrodes; and insulating protective films each provided between the bus electrode and the insulator layer and between the bus electrode and the backside substrate.

A surface-enabled, metal ion-exchanging battery device comprising a cathode, an anode, a porous separator, and a metal ion-containing electrolyte, wherein the metal ion is selected from transition metals and at least one of the electrodes contains therein a metal ion source prior to the first charge or discharge cycle of the device and at least the cathode comprises a functional material or nano-structured material having a metal ion-capturing functional group or metal ion-storing surface in direct contact with the electrolyte. This energy storage device has a power density significantly higher than that of a lithium-ion battery and an energy density dramatically higher than that of a supercapacitor.

The invention relates to a multi-core integrated branch cable and a production method thereof. The multi-core integrated branch cable comprises a main cable, branch cables, connecting fixtures and the like, wherein the main cable or each branch cable is formed by twisting 2 to 5 insulated conductors into a core wire, winding, coating and binding the core wire by bags into a cable core, and coating a layer of plastic outer sheath on the cable core through extrusion; the main cable is provided with phase conductor openings connected with terminations of the branch cables; the phase conductor openings are staggered at equal intervals in turn; copper conductors of the terminations of the branch cables with the same phase are in crimp connection with copper conductors at the phase conductor openings of the main cable into a branch connecting body through the connecting fixtures and a compression mould; the crimp connection part is coated with an ethylene propylene rubber self-adhesive tape which is coated with a cross-linked polythene insulation layer; and a sheath of the branch connecting body is moulded on the insulation layer. The multi-core integrated branch cable has a reasonable and compact structure, realizes that a single cable replaces four or five single core cables for use, and has simple laying and small occupied space.

The invention discloses a composite insulator electric field optimization method based on a multi-target genetic algorithm. The method comprises steps as follows: 1) solving an electrostatic field open domain problem; 2) establishing a composite insulator geometric model; 3) performing numerical computation on the composite insulator electric field intensity in Maxwell software; 4) in order to break through the limitation of a Maxwell software optimization module, adopting the VB (visual basic) script of the Maxwell software to realize data connection of the Maxwell software and MATLAB software; 5) in the MATLAB software, optimizing shed radiuses with the multi-target genetic algorithm; 6) obtaining optimized composite insulator electric field distribution. According to the method, the field intensity Range_E minimization and the field intensity gradient Max_GradE minimization are taken as multiple optimization targets, and large, medium and small shed radiuses of a composite insulator are optimized, so that the composite insulator electric field distribution is more uniform.

The invention relates to a preparation method of a non-linear composite material having adaptive uniform electric field, belonging to the technical field of electric materials. The method comprises the following steps: using zinc oxide, bismuth oxide, manganese oxide, cobalt oxide, chrome oxide, antimony oxide and alumina as raw materials, mixing after weighing in proportion, adding alcohol in the mixture, grinding with a grinding ball prepared by pure silicon oxide, and drying and crushing the grinded slurry; adding a vulcanizing agent in methyl vinyl silicone rubber, dissolving with tetrahydrofuran to obtain a mixed solution, mixing the mixed solution with zinc oxide pressure-sensitive powder to obtain a mixture, and carrying out hot forming on the mixture to obtain the non-linear composite material. The prepared non-linear composite material disclosed herein can effectively reduce electric field intensity when being applied in high voltage power transmission and transformation system insulation parts having strong nonuniform electric field, and can keep good insulation characteristic in low electric field intensity regions.

The invention relates to a voltage transformer, comprising a winding part wound on an iron core, wherein the winding part and the iron core are both sealed in an insulator, the voltage transformer is characterized in that the winding part comprises a secondary winding directly wound on an external surface of the iron core, an insulating layer wound on an external surface of the second winding, a primary winding wound on an external surface of the insulating layer, and a grading ring wound on an external surface of the primary winding. Compared with the prior art, the voltage transformer of the invention has the following advantages: insulation level of a tail end of the primary winding is improved to 20kV so as to satisfy high voltage caused by voltage division of a resonance eliminator, secondary load is large, precision is high, surface creepage distance is large, the grading ring is placed on the primary winding, and the iron core is covered with semiconductor materials, so that the whole product has uniform electric field and has no suspension potential. If the product has unsatisfactory error after casting, the product can be adjusted by externally adding a compensation coil so as to achieve optimal state of the error.

The invention discloses an electrochemical machining array electrode which is characterized by comprising electrode units, an array electrode clamp, a power module and an electrode clamp joint. The electrode unit is a strip-shaped solid, or a thin-wall hollow or grooved structure; the electrode units are clustered to form an array electrode unit cluster; the array electrode unit cluster is clamped by an electrode unit clamp; the bottom end of the array electrode unit cluster can form an end surface of any contour shape; and if the electrode unit is a thin-wall hollow structure or grooved structure, the electromechanical machining array electrode also comprises an electrolyte module so that the electrode units realize liquid flushing or absorption, or partial liquid flushing and partial liquid absorption. Through the invention, the electrode production time of electrolytic formation machining can be obviously shortened, the cost and difficulty in the electrode production are reduced, the utilization rate of the electrode material is improved, and the machining efficiency and speed are improved; and meanwhile, the electric field and flow field during the electromechanical machining are homogenized, selective machining can be realized at different positions of the electrode, and the machining accuracy and quality are improved.

Disclosed is an epoxy resin cast dry type transformer, which comprises a low-voltage winding, two high-voltage windings, an iron core, an upper heel piece, a lower heel piece, an upper clamp, and a lower clamp. The low-voltage winding is arranged at the inner layer of the loop and the high-voltage windings are arranged at the outer layer of the loop. The low-voltage winding is made of clutch gold and is provided with an insulating interlayer which is presoaked with DMD resin. The initial loops of the high-voltage windings are located at one end of the whole loop, and the starting end of the first coil of each layer of the high-voltage windings is connected with the finishing end of the last coil of the next layer. The number of the coils of the windings descends from the inner layer to the outer layer, making the windings developing into antiparallelogram structures; a soft gridding cloth layer is arranged between each two adjacent layers; the whole medium is epoxy resin and solvent-free gridding material is arranged between the outer layers of the windings at both ends of the whole loop. The epoxy resin cast dry type transformer is reasonable in design, novel in design, large in power, and small in size, and is convenient to install and easy to maintain. The epoxy resin cast dry type transformer is safe, stable and reliable and is long in service life and low in using cost and requires no daily maintenance. The epoxy resin cast dry type transformer is of strong practicability and is applicable in power supplying departments and power consuming departments.

The invention discloses a method for obtaining a uniform electric field for electrically repairing polluted soil. The method comprises the following steps: digging grouped channels or grooves of certain widths and depths at certain intervals in a field needing soil repair; filling current-conducting carbon particles being phi1.5-phi5 millimeters in particle sizes into the grouped channels or grooves; placing leading-in terminals of a power supply into the current-conducting carbon particles in the grouped channels or grooves to form parallel electrodes, wherein the number of the electrodes is 2*N or 3*N, and N is a positive integer. By adopting the method, a uniform soil repair electric field can be provided, spindle type electric field distribution is eliminated, and the problems of the need of repairing microorganism-polluted soil with a completely symmetrical electric field and the like are particularly solved. Compared with the distribution of linear electrodes or matrix electrodes, the method has the advantages of simplicity and easiness in making electrodes, low cost and higher efficiency.

The invention relates to a 132kV-class 36-pulse-wave transmission rectifier transformer and belongs to the technical field of transformers. According to the technical scheme, the rated voltage of a primary side is 132kV, and the primary side is subjected to D connection and in an all-insulation structure; and a secondary side is subjected to double split and phase shifting, and the difference between phase shifting angles is 10 degrees. A single transformer outputs 12 pulse waves, and three transformers output 36 pulse waves. Low-voltage windings comprise an axially arranged low-voltage basic winding I (2) and low-voltage phase shifting winding I (3) and an axially arranged low-voltage basic winding II (7) and low-voltage phase shifting winding II (8). High-voltage windings comprise a high-voltage winding I and a high-voltage winding II which are connected in parallel vertically. By means of the rectifier transformer, the utility rate of space of the transformer is improved, and the size of the transformer and the production cost are reduced; effects of grid-side overvoltage on valve-side rectifying elements and effects of valve-side harmonic components on power grids are reduced; and the transformer is reliable in insulation, high in short-circuit bearing capacity and phase shifting angle accuracy and capable of improving power quality.

A method for forming a liquid crystal alignment layer. First, a first substrate is provided, and a conductive layer, an insulating layer covering the conductive layer, and a plurality of alignment electrodes arranged on the surface of the insulating layer are sequentially formed on the surface of the first substrate. Then a second substrate is arranged parallel to the first substrate, and then a liquid crystal alignment composition and a positive type liquid crystal material are mixed and injected between the first and second substrates, and placed between the conductive layer and the alignment electrode A voltage is applied between the first and second substrates, so that an electric field is generated between the first and second substrates. After the liquid crystal alignment composition is deflected to a predetermined direction, the liquid crystal alignment composition is polymerized to form an alignment layer. Since the arrangement of the conductive layer and the alignment electrodes can make the distribution of the electric field more uniform, the alignment consistency of the liquid crystal alignment composition can be improved.

The invention discloses a laterally diffused metal oxide semiconductor (LDMOS) device; the LDMOS device comprises a source region, a gate region, a drain region, a body region, and a drifting region with doped type opposite to the body region; the body region is arranged on a substrate region, and the drifting region is arranged between the drain region and the body region. The LDMOS device also comprises an insulated dielectric layer, and the insulated dielectric layer is positioned on the drifting region and below the gate region. By using the structure of the LDMOS device provided by the invention, the puncture voltage of the device can be enhanced, so that the on-resistance is lowered and the power consumption of the device is reduced; and in the adjusting and fabricating process, junction depth for adjusting the insulated dielectric layer and the drifting region has smaller effect on the other devices.