107 results about "Homogeneous electric field" patented technology

The invention provides a device and method for testing the reliability of a power sensor, and the device comprises a magnetic field generation unit which is used for providing an alternating current for a Helmholtz coil through a power frequency current source, and generating a controllable magnetic field; the electric field generating unit is used for providing a high-voltage direct current or power frequency alternating current power supply for the parallel-plate capacitor through a high-voltage generator to generate a uniform electric field; the tested unit is used for providing a standard excitation signal through a standard source matched with the to-be-tested sensor, simulating an input condition of the to-be-tested sensor under an actual working condition and collecting output data of the to-be-tested sensor; and the control unit is used for setting test parameters, generating a control instruction according to the test parameters and generating a test result according to the output data. According to the device and the method, by simulating a strong magnetic field and a strong electric field environment and combining application of various measured parameters and an automatic control system, the reliability evaluation requirement of the sensor under the actual working condition is fully met.

A method of producing a battery electrode includes applying an electrode material onto a surface of a current collector, the electrode material comprising a binder material having binder particles, initiating a drying process to dry the electrode material, and applying a non-uniform electric field to the electrode material during the drying process. The non-uniform electric field defines a magnitude gradient to generate dielectrophoretic forces on the binder particles, thereby moving the binder particles.

The application discloses an aortic valve guide wire and a use method thereof, which comprises a head section, a transition section and a support section connected in sequence along an axial direction; the head section is composed of a polymer and further comprises a deformation capsule, at least one closed unit embedded in the head section, and an internal sealing electric field sensitive viscoelastic fluid; a mesh cable is arranged on the surface of the deformation capsule and extends to the transition section; the transition section and the support section are provided with a conductive film on the surface, and the conductive film is connected with the mesh cable and used for applying a non-uniform electric field to the deformation capsule to generate a regional viscosity difference and drive the head section to bend in a direction.The electric field sensitive viscoelastic fluid built in the head section generates a regional viscosity difference under the action of the non-uniform electric field, and the difference is converted into a directional bending moment through the synergistic effect of the mesh cable and the conductive film, so that the head of the guide wire can quickly respond to an external electric signal and accurately deflect.

The present invention discloses a phase-splitting environmentally friendly gas ring network cabinet, comprising a cabinet body, on which a three-phase upper incoming line, a three-phase lower outgoing line, and a three-phase grounding bar are arranged. A three-position circuit breaker and an isolating switch are installed in the cabinet body, and the movable contact rod of the isolating switch is respectively rotated to a closing position in contact with the upper incoming line, a grounding position in contact with the grounding bar, and an isolating position between the upper incoming line and the grounding bar; the circuit breaker comprises an insulating cover, a support, a static contact, a vacuum interrupter, a circuit breaker main shaft, and a top rod. The switch shafts of the circuit breaker and the isolating switch are metal shafts, and the three phases are separated from each other and directly connected without insulating material. The three phases are connected through a grounded metal shaft. Through the above-mentioned method, the present invention has a phase-splitting arrangement, each phase is insulated from the ground, and only a breakdown to the ground occurs. The overcurrent and quick-break of the relay can quickly play a protective role, reducing the time and scope of power outages. The uniform electric field design effectively avoids the concentration of the electric field at the tip part and controls partial discharge.

The invention discloses a drop-out blocker with a coaxial Z-shaped alternate connection structure, and relates to the technical field of high-voltage current-limiting fuses, a plurality of annular capacitor modules are connected end to end, the annular capacitor modules at the two ends are connected with a first connector and a second connector respectively, a transition connecting piece is installed between the annular capacitor modules, and the transition connecting piece is connected with the annular capacitor modules. The annular capacitor modules are electrically connected, a layer of cylindrical insulating shell is poured on the outer side walls of the annular capacitor modules, and the first connector and the second connector extend out of the insulating shell. The invention provides a coaxial array Z-shaped alternating series structure aiming at the core defects of uneven electric field distribution, low direct current voltage withstanding level and poor space utilization rate in the existing technology of stacking electronic components in a slender insulating shell. The objective of the invention is to solve the technical problem that high voltage resistance, uniform electric field distribution and high mechanical reliability are difficult to realize in a narrow space in the prior art.

This invention provides a microplastic particle screening and separation device and method based on photoinduced dielectrophoresis. The device comprises a photoinduced dielectrophoresis chip consisting of a first illumination region, a second illumination region, a controllable barrier block, and a microchannel layer. By applying light to different positions on the photoinduced dielectrophoresis chip, the conductivity at the illumination position changes, thereby generating a non-uniform electric field. Due to the different radii of the microplastic particles, the magnitude of the photoinduced dielectrophoretic force varies. Larger-radius microplastic particles experience a greater dielectrophoretic force and cannot pass through the illumination region, while smaller-radius microplastic particles experience a smaller dielectrophoretic force and can flow to the sample outlet. By changing the position of the controllable barrier block, the separation of microplastic particles of three different radii can be achieved. The microplastic particle screening and separation device and method based on photoinduced dielectrophoresis described in this invention can achieve the separation and screening of target microplastics of different sizes using contactless photoinduced dielectrophoresis force.

The application discloses a DNA molecule manipulation chip based on electric field and bending micro-channel coupling driving, which comprises a glass substrate and a structure layer, the structure layer is arranged on the glass substrate, at least one group of micro-fluid systems are arranged in the structure layer, two ends of the micro-fluid system are respectively communicated with a liquid inlet hole and a liquid outlet hole, the liquid inlet hole and the liquid outlet hole are vertically arranged through the structure layer, electrodes are respectively inserted into the liquid inlet hole and the liquid outlet hole, and the electrodes are used for applying direct current voltage to generate a spatial non-uniform electric field; a control method applied to the chip comprises the following steps: chip pretreatment, application of driving electric field, DNA molecule acceleration and polarization, DNA molecule positive dielectrophoresis focusing and migration; the application realizes high-efficiency mechanical-free focusing of the DNA molecules, and greatly improves the precision of subsequent optical detection and separation.

The invention provides a Kelvin drip generator corona discharge enhancement-based friction nanometer generator and a preparation method thereof. Wherein the generator comprises a Kelvin water dripping machine, high voltages at two ends of the Kelvin water dripping machine are respectively coupled to a back gate electrode and a suspension needle, a non-uniform electric field is constructed in a needle tip-FEP area, corona discharge is triggered, charges are directionally injected into an FEP / liquid drop system, and the FEP / liquid drop system is charged. The injected charges are connected in parallel into the device through a multi-branch capacitor network formed by the back gate electrode, the upper electrode / the lower electrode and the FEP. According to the invention, through cooperation of exogenous pumping and liquid drop charge shuttling (DSG), single-drop transfer charge and open-circuit voltage are significantly improved, and direct-current stepped accumulative output is maintained.

The invention discloses a liquid crystal light deflector and a driving method of the liquid crystal light deflector. The liquid crystal light deflector comprises a liquid crystal light deflection panel and a controller. The liquid crystal light deflection panel includes a liquid crystal and an electrode that applies an electric field to the liquid crystal. The controller applies a predetermined electric field to the liquid crystals for driving the liquid crystals in a direction orthogonal to an initial alignment direction of the liquid crystals, thereby converting the liquid crystal light deflection panel to a first state causing deflection. The controller applies a uniform electric field to the liquid crystals for driving at least some of the liquid crystals in a direction orthogonal to the initial alignment direction, thereby transitioning the liquid crystal light deflection panel from the first state to a second state without causing deflection.

The invention relates to the technical field of fire detection, and discloses a multi-sensor pyrolysis particle fire detection control system and device, and the system comprises a power supply and signal coupling module, a dielectrophoresis modulation detection cavity module, a multi-dimensional environment sensing module, a central processing unit and an execution module. The power supply and signal coupling module extracts a high-frequency conducted interference signal of a power supply circuit and generates a high-voltage driving signal and a reference signal respectively; the dielectrophoresis modulation detection cavity module is used for establishing a non-uniform electric field by utilizing a high-voltage driving signal and carrying out dielectrophoresis modulation on aerosol particles passing through a detection area; the central processing unit synchronously collects the photoelectric detection signal and the reference signal, and determines the fire state by calculating a cross correlation coefficient. The device integrates the modules in a shell. According to the invention, physical and signal correlation between power supply noise and particle concentration change is established, electrical fire pyrolysis particles and environmental dust are effectively distinguished, and high-sensitivity early detection of electrical fire is realized.

The invention discloses a method for quickly removing bubbles in a porous medium based on electric field regulation and control, which comprises the following steps: arranging an electrode in a mold, and applying a non-uniform electric field to a porous medium flow field containing bubbles through the electrode in a resin impregnation process; based on a non-uniform electric field, dielectrophoretic force is induced to be generated at an interface of fluid-bubble-porous medium; through dielectrophoretic force, the bubble form is regulated and controlled, and the bubbles are driven to accelerate directional migration, so that the bubbles escape from the porous medium. According to the method, the limitation that a traditional bubble removal method mainly depends on pressure gradient and capillary force passive gaming is overcome, efficient, accurate and active regulation and control and rapid removal of the tiny bubbles in the porous medium are achieved, and the porosity of the composite material is effectively reduced.

This invention discloses an optimized electric field structure for a 12kV medium-voltage environmentally friendly gas C-GIS switchgear, comprising a switchgear busbar compartment, a three-position switch housed therein, three equally spaced incoming and outgoing bushings, and connected three-phase busbars. Specifically: the C-phase busbar is sequentially connected by a first lower vertical section, a first inclined section tilting to the left, and a first left horizontal section; the B-phase busbar is directly connected by a second lower vertical section to a second left horizontal section; the A-phase busbar is sequentially connected by a third lower vertical section, a second inclined section tilting to the right, and a first right horizontal section; the radius of curvature of the edge rounded corners of the horizontal sections of each phase busbar is 20mm; the bending angle between the inclined and horizontal sections of phase A is 130°, phase C is 140°, and the bending angle between the lower vertical and horizontal sections of phase B is 90°; the spacing between the three-phase busbars is 90mm. This invention can reduce the maximum electric field intensity in the busbar compartment, achieve a uniform electric field distribution, prevent partial discharge, and significantly improve the insulation reliability and safety of the switchgear.

The invention relates to a device and a method for efficiently purifying black phosphorus based on an electromigration separation principle. According to the method, the Coulomb force borne by black phosphorus is larger than the weak acting force combined with the impurities through the designed three-area grading electric field device by means of the conductivity difference between the black phosphorus and the impurities, the black phosphorus is separated from the impurities firstly, particles are promoted to generate different movement tracks, and therefore the purposes of separation and purification are achieved, and meanwhile the integrity of a crystal structure is maintained. The core of the device is composed of three functional areas, namely a preselection area, a main selection area and a fine selection area. The uniform electric field intensity of 15-20kV / m is adopted in the pre-selection area, so that impurities such as oxides adsorbed on the surface of the black phosphorus can be effectively removed; the gradient electric field intensity of 30-40 kV / m is adopted in the main selection area, and a parallel static magnetic field of 0.5-2 T is introduced, so that metal impurities (such as tin and bismuth) and non-metal impurities (such as red phosphorus and iodine) can be effectively removed; a uniform electric field of 25-35 kV / m is adopted in the fine selection area, trace impurity elements can be finely removed, and the purity of the finally obtained crystal is larger than 99.5%.

The application discloses a motor anti-corona material corona resistance performance test device, system and method, relates to the high-voltage motor insulation technical field, and the test device comprises a plate electrode assembly and a blade electrode, the plate electrode assembly is used for bearing a sample to be tested, and a grounding electrode is fixed to the lower surface of the plate electrode assembly; the bottom of the blade electrode has a straight line blade with a length of 50 mm+ / -0.1 mm, the main body curvature radius of the blade cross-section profile is 0.22 mm+ / -0.008 mm, the straight line blade is formed by the intersection of two inclined sides, the blade included angle is 53.14 DEG, and the corner at the length direction end has a roundness with a diameter of 3 mm+ / -0.2 mm; during the test, a uniform and spacing-adjustable discharge gap is formed between the surface of the straight line blade and the surface of the sample to be tested on the upper surface of the plate electrode assembly. The application solves the problems that the existing test device cannot simulate a real non-uniform electric field and is difficult to produce standardized corona erosion, and realizes efficient and repeatable quantitative evaluation of the corona resistance performance of the anti-corona material.

The invention relates to the technical field of insulation testing of high-voltage variable frequency motors, in particular to a testing structure and method for insulation breakdown or partial discharge of a variable frequency motor, and the structure comprises a hollow metal tube body which is wrapped by an insulating layer for insulation breakdown test or partial discharge test. A coaxial cylinder electrode structure for generating a radial uniform electric field is arranged in the middle of the metal tube body; the insulating layer is positioned on the surface of the coaxial cylinder electrode structure; a winding wire layer is arranged on the outer side of the coaxial cylinder electrode structure, the inner side of the winding wire layer makes contact with the coaxial cylinder electrode structure, and one end of the winding wire layer is led out to serve as an electrode to be connected with an external testing circuit. The two ends of the metal tube body serve as electrodes to be connected with an external test circuit. According to the invention, the electrical stress borne by insulation under the actual operation condition can be effectively simulated, and the comprehensive measurement of the insulation breakdown strength and the partial discharge characteristic can be realized. The structure is reasonable in design and convenient to manufacture, and has good repeatability and adaptability.

The application provides a microfluidic chip and a biological particle separation device based on the microfluidic chip, which comprises a main flow channel, a plurality of bypass flow channels and an electrode flow channel. The electrode flow channel is arranged on both sides of the side wall of the main flow channel and forms a plurality of electrode zones along the extension direction of the main flow channel, so as to provide a non-uniform electric field for the main flow channel; the plurality of bypass flow channels are sequentially communicated with the main flow channel along the extension direction of the main flow channel, so that the electrode zones and the bypass flow channels are alternately and spacedly arranged along the extension direction of the main flow channel. Thus, after the sample liquid is injected into the main flow channel, different target biological particles in the sample liquid can produce different lateral deviations under the dielectrophoresis force of one or more electrode zones, so that the target biological particles can flow out from the liquid outlet of the corresponding bypass flow channel or the main flow channel, and the efficient separation of biological particles of multiple sizes and types is realized.

An electron detector (22) for an electron microscope (10), which generates a primary electron beam (16) to illuminate a sample (18), has a tubular section (32) with an internal volume (34). The primary electron beam (16) can pass through the internal volume (34) to illuminate the sample (18). The electron detector (22) has a detector element (26) located outside the tubular section (32) and configured to detect electrons moving from the sample (18) in a second direction (42) opposite to the direction of the primary electron beam (16). In the second direction (42) upstream of the detector element (26), a filter grating (28) is arranged, extending in a third direction (60) perpendicular to the beam direction of the electron beam (16).The electron detector (22) has an insulator (36) that electrically isolates the filter grid (28) and the tubular section (32) from each other, so that the filter grid (28) can be at a negative electrical potential relative to the housing (24). A plurality of electrodes (48, 50, 52) made of an electrically conductive material are arranged outside the tubular section (32) and are configured to generate a predominantly homogeneous electric field (56) between the filter grid (28) and the detector element (26). The electric field (56) has equipotential lines (66) that run predominantly parallel to the filter grid (28) in the third direction (60).The electrodes (48, 50, 52) are further configured to selectively distort the electric field (56) in the region of the insulator (36) such that the equipotential lines (66) in a defined area (68) between the filter grid (28) and the detector element (26) exhibit an inhomogeneous, predominantly downward slope. The defined area (68) extends from the filter grid (28) in the second direction (42) and from the tubular section (32) in the third direction (60).

The application provides a gradient polymer electrolyte and a preparation method and a solid-state battery thereof, and particularly relates to the technical field of electrolytes. The preparation method comprises the following steps: firstly, dissolving positive and negative electrode side polymer electrolytes in organic solvents respectively, and preparing positive and negative electrode side polymer electrolyte solutions; secondly, coating the positive and negative electrode side polymer electrolyte solutions on a substrate to obtain a composite preformed film; and thirdly, placing the composite preformed film in a uniform electric field, and diffusing and drying the composite preformed film in a vacuum environment at a certain temperature, so that the gradient distribution is fully performed to obtain a gradient polymer solid-state electrolyte. The solid-state electrolyte prepared by the application can solve the interface impedance problem and improve the cycle performance of the solid-state battery.

An electrode apparatus and method remove a polarized molecule in a fluid. In another aspect, a non-uniform electric field is created between an anode and a cathode, the fluid flows within a gap between the cathode and the anode, and the polarized molecule is driven by an electrostatic force to and adsorbed on the anode without experiencing a chemical reaction.

The ignition needle device comprises an ignition needle, a fire cover and an electric field guiding component, the ignition needle comprises a discharging end, the fire cover comprises a protruding edge used for receiving discharging of the discharging end, and the electric field guiding component comprises a tip end close to the protruding edge. The included angle between a first connecting line between the protruding edge and the discharging end and a second connecting line between the protruding edge and the tip end is smaller than 90 degrees, and the electric field guiding component is used for turbulent flow so that a non-uniform electric field can be formed between the discharging end and the protruding edge. The burner comprises the ignition needle device. According to the ignition needle device, the electric field guiding component is arranged, so that the auxiliary electric field is formed between the discharging end of the ignition needle and the electric field guiding component, and the auxiliary electric field is overlapped with the main electric field between the discharging end and the fire cover convex edge, so that the non-uniform degree of the main electric field is increased; when the non-uniformity degree of the electric field is increased, the local electric field intensity can be remarkably increased, so that gas is broken down, and the ignition success rate is increased.

The application discloses a liquid metal injection type annular micro-particle fractionation micro-fluidic device and method, relates to the technical field of micro-fluidics and biological particle separation, and comprises a micro-fluidic chip main body which is internally provided with a sample channel, positive and negative electrode channels which are arranged in the micro-fluidic chip main body and are parallelly distributed on the two sides of the sample channel respectively, a liquid metal electrode array which is composed of liquid metal filled and solidified in the electrode channels, and the liquid metal electrode array for generating a non-uniform electric field in the sample channel, wherein the electrode channels are in a meandering and returning structure, so that the liquid metal electrode array forms thick-wall side electrodes in the micro-fluidic chip main body; and the device realizes high-throughput, high-purity and low-damage label-free biological particle separation.

The invention discloses a spark-gap-based power transmission line discharge detection device carried by an unmanned aerial vehicle, and belongs to the technical field of discharge detection, the spark-gap-based power transmission line discharge detection device comprises an external combination, a storage combination and a detection combination, and the detection combination comprises an induced electric breakdown module which enables a non-uniform electric field induced voltage to form a relatively high potential difference to cause air gap breakdown; the invention relates to an electric field sensor which is composed of four electrodes with balls at the tail ends, the distances from each electrode to the other three electrodes are the same, and when an electric field is not uniform, the potential difference between the electrodes is possibly too high, so that air breakdown is caused. The light acquisition module is used for acquiring the brightness of electric sparks caused by breakdown, consists of a photoresistor and an operational amplifier, and is used for monitoring whether the induced electric breakdown module is broken down or not in real time, measuring the illumination intensity caused by breakdown and judging the strength of breakdown; and the buzzing light alarm module is used for emitting harsh sound. The spark gap-based power transmission line discharge detection device carried by the unmanned aerial vehicle is high in detection speed and high in detection efficiency.

The invention discloses a composite electrophysiological positioning and contact force measuring method and system. The method comprises the following steps: constructing a three-dimensional space non-uniform electric field; through an optical trap structure integrated at the tip of the catheter, preset charged particles are captured, and the intensity of a vector electric field is sensed; acquiring a displacement signal of the particle, and decoupling the displacement signal into a three-axis electric field component; converting the electric field component into a three-dimensional space position of the tip of the catheter; three-dimensional contact force generated by contact between the catheter and the endocardium is detected through an optical fiber sensing structure arranged at the tip end of the catheter, and measurement is carried out through optical parameter changes of the optical fiber sensing structure. The system comprises a three-dimensional non-uniform electric field construction module; the composite conduit includes: a vector electric field measurement unit; the three-dimensional contact force measuring unit comprises at least one FBG (Fiber Bragg Grating) or F-P (Fabry-Perot) cavity arranged on the optical fiber; and a signal processing module. The principle is innovative, and a three-dimensional electrophysiological positioning composite three-dimensional contact force measurement scheme with micron-level positioning precision, low cost and open compatibility is provided.

The invention discloses a method for preparing a micro-nano quantum dot light-emitting diode based on an electrically programmable surface energy lamination. According to the method, photoetching and developing are avoided, residues are not introduced, erosion to an organic layer is avoided, and the process environment compatibility is good. The inside of the pixel is oleophylic, the outside of the pixel is oleophobic, then an alternating non-uniform electric field is applied to generate field induced dielectric enrichment (FiDEF), quantum dots at the boundary are enriched towards the inner side of the pixel to sharpen the boundary, the coffee ring effect is avoided, and dark current and optical crosstalk are remarkably reduced through cooperation of long-term lyophobic outside the pixel, edge densification and outer ring passivation.

The invention discloses a self-adaptive adjustment method and system of a self-calibration electroscope and a medium, and relates to the related field of electric field detection.The self-adaptive adjustment method comprises the steps that the electroscope is started, a detection head of the electroscope comprises a multi-ring induction electrode set which is concentrically distributed, the multi-ring induction electrode set is installed on an insulation support, each ring corresponds to a set of independent induction electrodes, and the detection head of the electroscope is connected with the insulation support; the electrode distance between the multi-ring induction electrode groups is adjustable; based on preset electrode spacing configuration parameters, the multi-ring induction electrode group synchronously receives electric field induction signals through the signal extraction module and outputs multiple groups of electric field induction signals; and analyzing the multiple groups of electric field induction signals by using the self-adaptive adjustment model, outputting self-adaptive electrode spacing configuration parameters, adjusting the electrode spacing of the multi-ring induction electrode group, and receiving the multiple groups of electric field induction signals again. The technical problem that the detection precision is insufficient due to the fact that the distance between the electrodes of the electroscope is fixed in existing non-uniform electric field detection is solved, and the technical effect of improving the non-uniform electric field detection precision is achieved.

The invention discloses an application of an anti-corrosion commercial coating as a zinc negative electrode coating in an Ah-grade zinc metal soft package battery by introducing an additive into the anti-corrosion commercial coating, and belongs to the technical field of aqueous zinc metal secondary batteries. The invention uses tallow amines as additives to be introduced into commercial coatings. Under the action of an electric field, the preferentially adsorbed tallow amine is chemically adsorbed with zinc, so that the acting force between the coating and the zinc negative electrode is enhanced, and the coating is prevented from falling off. Meanwhile, water-related side reactions are effectively inhibited through coating modification, ordered deposition of zinc ions is guided, an electric field is uniform, the effect of inhibiting dendritic crystal growth is achieved, and the electrochemical reversibility of the zinc negative electrode is improved. Therefore, the ZnZn symmetric battery assembled by using the zinc negative electrode containing the tallow amine coating circulates for 1500 hours at the current density of 2 mA cm <-2 >; the assembled ZnMnO2 button type total battery circulates for 500 circles under the current density of 1A g <-1 >; the soft package battery circulates for 15 circles under the current density of 2 mA cm <-2 >, and has the capacity of 1.0 Ah. The preparation process is simple, the effect is remarkable, the cost is low, and the requirements of environmental economic benefits are met.

The application provides an oil bubble discharge experiment platform comprising an optical diagnosis system, realizes quantitative research on bubble discharge characteristics of transformer oil under different parameters, and can observe clear images in a bubble discharge process, and the experiment platform comprises: a power supply system for power supply, wherein the power supply system comprises a test transformer, a protection resistor and a fast protection module; an experiment cavity for containing transformer oil; an electrode system installed in the experiment cavity and used for constructing a uniform electric field oil gap or a non-uniform electric field oil gap; a bubble generating system used for adding bubbles to the oil gap; a partial discharge detection system used for collecting partial discharge signals and analysis; and an optical diagnosis system used for observing the bubble discharge process of the oil gap in the experiment cavity; wherein the partial discharge detection system is further connected with the fast protection module, and is used for outputting signals to the fast protection module when a discharge or breakdown event occurs, so that the power supply system is cut off by the fast protection module.

Provided herein are microfluidic devices that can be configured to generate an electrophoretic flow that is in opposition to a fluid flow through a microcapillary of a microfluidic device provided herein. Also provided herein are methods that include adding an amount of particle to the inlet area of the microfluidic device as provided herein, generating a first fluid flow through the microcapillary of the microfluidic device provided herein; and applying a uniform electric field to the microfluidic device, where the uniform electric field generates an electrophoretic flow that is in opposition to the fluid flow.

An enhanced GaN transistor includes a multi-region field plate (406) that overlaps a gate portion and a barrier offset layer portion. The multi-region field plate includes a section located above a portion of the gate closest to the drain contact and having an increasing height relative to the channel layer and a section located above an edge or transition of the barrier offset layer and having a decreasing height relative to the channel layer, thereby minimizing peak electric fields at corners of the gate and at edges or transitions of the barrier offset layer.

The invention provides an electric separation device and method for removing solid catalyst particles in catalytic slurry oil, and belongs to the technical field of slurry oil solid removal and petrochemical engineering, the device comprises an outer cylinder, an inner cylinder and a central metal rod which are coaxially arranged, the inner cylinder is connected with a high-voltage power supply to form a non-uniform electric field, and the outer cylinder and / or the inner cylinder are / is of a variable-diameter structure; due to the design, the electric field gradient is enhanced in a variable-diameter area, so that the dielectrophoretic force acting on the superfine catalyst particles is increased; meanwhile, according to the fluid continuity principle, the flow speed of the oil slurry decreases progressively due to increase of the cross section area of a channel in the flowing process from top to bottom, the particle retention time is prolonged, and fluid drag force is reduced. Through the synergistic effect of the two effects, the removal efficiency of superfine particles with the diameter smaller than 1 micron is remarkably improved. The device is simple in structure, does not need a complex control system, can achieve efficient and stable solid removal under moderate electric field intensity, and is suitable for various complex working conditions.