95results about How to "Increase the facing area" patented technology

The invention provides an edge expansion type high coupling coefficient non-contact transformer, comprising a primary magnetic core, a primary winding, a secondary magnetic core and a secondary winding; the bottoms of two side columns of the primary magnetic core or / and the secondary magnetic core extend outward along the lateral side, the windings are respectively wound on the two magnetic core side columns whose bottoms extend outward, two parts of windings on the two magnetic core side columns are forwardly connected in series to form the primary winding or the secondary winding. By methods of enhancing the width of a window and positive areas of primary and secondary magnetic cores, splitting and linking windings, planar distributed windings arrangement and the like, the proportion of magnetic flux directly closed at the primary side can be effectively reduced, and the coupling coefficient of the transformer is improved; the expansion parts at the edge of the magnetic cores are limited at the bottom, thus remarkably reducing the volume and weight of the transformer while obtaining high coupling coefficient. The invention is extremely favourable for miniaturization, lightweight and efficiency of a non-contact power supply system and is suitable for most non-contact electric energy transmission occasions.

The invention discloses a fused quartz micro-hemispheric resonance gyroscope packaged based on an SOI and a processing method of the fused quartz micro-hemispheric resonance gyroscope. The fused quartz micro-hemispheric resonance gyroscope packaged based on the SOI comprises a glass substrate, an SOI sealing shell, a fused quartz micro-hemispheric shell resonator, a micro-hemispheric shell support post, a reference electrode, 8 sensitive electrodes, 16 exciting electrodes, a round metal bonding pad and a cylindrical electrode through hole. The electrodes are located below a spherical shell lip, so that an eccentric error caused by a problem of bonding alignment accuracy when the micro-hemispheric shell resonator and the electrode are assembled can be avoided; and an outer lip edge is added to the spherical shell lip, so that the opposite area of the electrode and the spherical shell lip is increased and the detection accuracy can be improved. The advantages of an SOI wafer are fully utilized and the micro-hemispheric resonance gyroscope is packaged, so that the packaging technology of the whole gyroscope is greatly simplified; and the micro-hemispheric resonance gyroscope is provided with 8 sensitive electrodes and 16 exciting electrodes, so that an all-angle working mode can be adopted and the dynamic property of the micro-hemispheric resonance gyroscope is strengthened.

The invention discloses an electric connector which is used for being inserted and connected into a butt joint element forwardly. The electric connector is characterized by comprising an insulating block, a plurality of pairs of differential signal terminals and a plurality of grounding terminals, wherein a plurality of first protruding blocks and a plurality of second protruding blocks are arranged on the front surface of the insulating block in a protruding mode; the first protruding block and the second protruding block are adjacently arranged, and a groove is formed between every two adjacent first protruding blocks and the second protruding blocks; the plurality of pairs of differential signal terminals and the plurality of grounding terminals are embedded in the insulating blocks; each differential signal terminal is embedded in the corresponding first protruding block and extends out of the first protruding block, and is used for electrically contacting the butt joint element; afirst side surface is arranged on each of the left side and the right side of the pair of differential signal terminals separately; the grounding terminals are arranged between the two adjacent pairsof differential signal terminals; each grounding terminal is embedded in the corresponding second protruding block and extends out of the second protruding block, and is used for electrically contacting the butt joint element; a second side surface is arranged on each of the left side and the right side of the grounding terminal separately; and the medium between the first side surface and the second side surface is air.

The invention relates to a touch display panel and a touch display device. The touch display panel comprises a display area and a non-display area surrounding the display area. the non-display area comprises at least one grooving area arranged at any position around the display area; the display area comprises a first display area and a second display area, the second display area is located between the first display area and the grooving area, the first display area and the second display area comprise a plurality of induction electrodes arranged in the first direction and a plurality of driving electrodes arranged in the second direction, and the induction electrodes and the driving electrodes are arranged in a mutually crossed and insulated mode; Wherein the sensing electrode and / or thedriving electrode comprise / comprises a plurality of electrode units, and each electrode unit comprises an electrode pattern and at least one dummy pattern; And the virtual patterns of the electrode units in the second display area are electrically connected with the electrode patterns. According to the touch display panel, by increasing the area of the electrode pattern in the second display area, the touch sensitivity of the display area near the grooving area of the touch display panel is effectively improved.

An electrical machine having high torque and reliability and low cost, has a stator and rotor facing each other via an air gap, and a bracket at each of both shaft-direction end surfaces of the stator and rotor. The stator core is formed of a dust core, and a stator side guide portion projecting in the shaft direction concentrically with an inner peripheral portion of the stator, is provided on each of both side surface portions of the stator core, a bracket side guide portion, which is fitted to the stator side guide portion, is provided at each of the brackets, and the air gap is secured by making the stator side guide portion fitted to the bracket side guide portion.

The invention provides an array substrate, and the array substrate comprises a glass substrate, a photoresist layer, a first metal layer, a dielectric layer, a buffering layer and a second metal layer, wherein the glass substrate, the photoresist layer, the first metal layer, the dielectric layer, the buffering layer and the second metal layer are sequentially stacked. A side, close to the first metal layer, of the photoresist layer is provided with a plurality of bulged structures, and the first metal layer covers the bulged structures. The first metal layer, the dielectric layer, the buffering layer and the second metal layer has the same shape as the bulged structures. According to the invention, the photoresist layer is provided with the bulged structures, thereby enabling the firs metal layer, the dielectric layer, the buffering layer and the second metal layer on the bulged structures to be corrugated, increasing the opposite area of the first and second metal layers, increasing the equivalent capacitance, facilitating the reduction of a space occupied by an equivalent capacitor, and achieving a narrow frame design. A manufacturing method for the array substrate can reduce the space occupied by the equivalent capacitor, and achieves the narrow frame design.

The invention discloses a high-performance integrated electromagnetic interference (EMI) filter. The filter comprises a first can-shaped magnetic core, differential mode capacitor, a first common mode inductor layer, a first common mode integrated LC structure, a leakage inductance layer, a second common mode integrated LC structure, a second common mode inductor layer and a second can-shaped magnetic core which are coaxially arranged in turn. The first common mode inductor layer and a layer of coil of the first common mode integrated LC structure are forwards connected in series together by a conducting wire to form a forward coupling structure. The second common mode inductor layer and a layer of coil of the second common mode integrated LC structure are forwards connected in series together by a conducting wire to form another forward coupling structure. The first and second can-shaped magnetic cores are buckled with each other, and the parts arranged between the first and second can-shaped magnetic cores are buckled in an accommodation cavity. The differential mode capacitor is formed by alternately laminating a plurality of layers of cylinder wall-shaped ceramic plates and copper plates with nicks, and an innermost layer and an outermost layer are both the copper plates. The filter with such a structure can easily realize an ideal differential mode capacitance value, and the high-frequency filtering performance of the EMI filter is improved.

The invented embodiment discloses a TFT-LCD array substrate and a method for manufacturing the same, relating to a liquid crystal display technique which can improve storage electric capacity under the condition that the aperture ratio is not lowered. The TFT-LCD array substrate includes a glass substrate, a pixel electrode and a storage capacitance bottom electrode on the glass substrate. Storage capacitance is formed between the pixel electrode and the storage capacitance bottom electrode; wherein corresponding convex-concave structure is formed between the surface of the storage capacitance bottom electrode and the opposite pixel electrode area. The TFT-LCD array substrate and a method for manufacturing the same provided by the invented embodiment are applicable to improvement of TFT-LCD storage capacitance.

The invention belongs to the field of pressure sensors, and particularly relates to a medium insertion type capacitive pressure sensor and a preparation method thereof. The medium insertion type capacitive pressure sensor comprises a base body, a supporting layer and a pressure sensing layer, the base body comprises a substrate and a comb-shaped electrode, the pressure sensing layer comprises an elastic film and a pressure sensing array located below the elastic film and connected with the elastic film, an array unit of the pressure sensing array is located over comb tooth gaps of the comb-shaped electrode, and the elastic film, the substrate and the supporting layer form a closed vacuum cavity structure, so that the elastic film drives the pressure sensing array to move downwards under the action of pressure, the position of the comb-shaped electrode is fixed, the pressure sensing array is inserted between two polar plates of a comb tooth electrode parallel plate capacitor, the relative dielectric constant of dielectric between the polar plates is changed, the capacitance is changed, and the pressure can be measured by detecting the capacitance. According to the capacitive pressure sensor, the sensitivity can be improved while the linearity is improved.

The disclosed semiconductor alloy capacitance includes cascaded type capacitance structure in filling medium. The structure includes low metal plate, dielectric layer, middle metal plate, another dielectric layer, and up metal plate in sequence from lower to upper. Through metal through hole, the middle metal plate is connected to an output electrode. The up metal plate and low metal plate are connected to the metal through hole and the other output electrode. Stacking metal layers and dielectric layers, the invention increases front opposite acreage between metal electrodes so as to raise specific capacitance density of metal capacitance, and performance of semiconductor device.

The invention discloses a micro hemisphere resonant gyro based on SOI (Silicon-On-Insulator) encapsulation and a processing method thereof. The micro hemisphere resonant gyro based on SOI encapsulation comprises a glass substrate, a micro hemisphere shell harmonic oscillator, two reference voltage wire leading posts, an electrode, an SOI sealing wall, an SOI crystalline silicon wafer upper layer, a silicon dioxide layer, a first electrode hole, a second electrode hole, a spherical shell support handle, a round metal electrode region and a metal lead wire. The electrode is positioned right above the spherical shell lip edge; the defect of inconsistent capacitive gap size due to bonding alignment precision during the assembly bonding is avoided; the processing error is reduced; the gyro precision is improved. The processing method of the micro hemisphere resonant gyro based on SOI encapsulation has the advantages that the advantages of the SOI wafers are sufficiently utilized, so that the encapsulation of the whole gyro is greatly simplified; the height and the diameter of the spherical shell handle can be easily controlled; in addition, the support intensity is high; collapse cannot easily occur.

The invention discloses a wireless charging device for an electric automobile based on photovoltaic power generation, and the charging device includes three modules: solar power generation, parallel resonance, and power storage. The solar power generation module includes a solar battery array, a charging and discharging control circuit, a storage battery, an inverter module, a voltage and currentcollection module, a processor, a communication module, an MPPT circuit and a motor dragging module. The parallel resonance module includes a half-bridge topology circuit, a transmitting and receivingcoil, a resonant capacitor, a capacitance compensation module and a position adjustment module. The electric energy storage module comprises a charging control circuit, a vehicle storage battery, a temperature acquisition module, and an overvoltage, undervoltage, overtemperature and overcharge protection and vehicle display prompt module. The invention has the beneficial effects that a battery board always maintains the maximum power electric energy transmission and improves the photoelectric conversion efficiency; the transmission area of the transceiver coil is improved to improve the transmission efficiency of the electric energy; the service life of the battery is prolonged, and the equipment reliability is improved; the device is connected with a vehicle display screen, thereby enabling the device to be more humanized and intelligent.

The invention discloses a touch screen and a display device. The touch screen comprises multiple first touch electrodes and multiple second touch electrodes, wherein each first touch electrode comprises multiple touch sub-electrodes which are arranged in the second touch electrodes, the touch sub-electrodes and the second touch electrodes are arranged on the same layer, and outer edges of the touch sub-electrodes and the inner edges of the second touch electrodes are arranged at intervals of preset distance. Each first touch electrode comprises the multiple touch sub-electrodes which are arranged in the second touch electrodes, so that the directly facing area of the first touch electrodes and the second touch electrodes is increased. Therefore, higher node capacitance can be formed by the first touch electrodes and the second touch electrodes in the same region, the influence on change of the node capacitance is increased when a finger touches a screen, and the precision of touch induction is improved.

The invention discloses a pulse metallic polypropylene film capacitor. The pulse metallic polypropylene film capacitor comprises a metal cylinder, a capacitor core, gold spraying layers, an upper insulation cover and a lower insulation cover, wherein the upper insulation cover and the lower insulation cover are fixedly connected by an explosion-prevention plate, a protection lead is arranged between the upper insulation cover and the explosion-prevention plate, an annular explosion-prevention gasket is arranged at each of the upper part and the lower part of the lower insulation cover, an impregnant is arranged in a gap between the metal cylinder and the lower insulation cover, the capacitor core is arranged in the metal cylinder, the gold spraying layers are arranged at the top end and the bottom end of the capacitor core, the capacitor core comprises a polypropylene film, the polypropylene film is evaporated with a metal layer in a high vacuum environment, and the metal layer comprises a wave-shaped double-sided metallic ZnAl layer, a first thickening layer and a second thickening layer. The pulse metallic polypropylene film capacitor has the advantages of excellent performance and high safety coefficient, and the capability of standing ripple current is high.

The invention discloses a touch display substrate and a touch display apparatus, relates to the technical field of display, and solves the technical problem of low sensitivity of the touch display apparatus. The touch display substrate comprises a plurality of touch electrodes, wherein the touch electrodes are divided into at least one touch electrode pair; each touch electrode pair comprises a first touch electrode and a second touch electrode which are adjacent; the first touch electrode comprises a first folded part and / or a first bent part; the second touch electrode comprises a second folded part and / or a second bent part; the second folded part is matched with the first folded part; and the second bent part is matched with the first bent part. The touch display substrate is applied to the touch display apparatus.

The invention discloses a simple electric field induction energy-taking power supply, and the power supply comprises an energy-taking module, a rectification energy storage module, a discharge controlmodule and a voltage stabilization module which are cascaded in sequence; the energy-taking module generates a space displacement current through equivalent capacitance between the metal induction polar plate and the high-voltage wire, and obtains electric field energy from a space electric field; the rectification energy storage module rectifies the obtained spatial displacement current into a direct current to charge an energy storage capacitor; the discharge control module performs on-off control on energy storage and release of the energy storage capacitor, and releases the energy when voltage at two ends of the energy storage capacitor reaches a discharge conduction threshold value; when the energy storage voltage is reduced to a discharge cut-off threshold value, only energy is stored; and the voltage stabilization module stabilizes the discharge voltage of the energy storage capacitor and supplies the stabilized voltage to a load. The simple electric field induction energy-taking power supply provided by the invention does not need to supply energy to a load after impedance conversion of a transformer, has the advantages of simple and convenient power supply circuit, easiness in implementation, small size and the like, and provides a new way for a working power supply of an online monitoring device of a power transmission line.

The invention relates to the technical field of valve machining and discloses valve machining assisting equipment for correcting a grinding position by utilizing dielectric constant changes. The valvemachining assisting equipment comprises a grinding shaft; the outer side of the grinding shaft is movably connected with a baffle; a trigger power supply is started due to offset of the grinding shaft; a coil spring positioned at the outer side of a second rotary disc is coiled and contracted due to rotation of a first gear; subsequently the second rotary disc is used for driving a ratchet wheelto rotate; the first gear rotates to reduce the areas, facing to each other, of an dielectric plate and an electrode plate face so that the power supply is stopped and the power of the power supply isstored after being transformed into rotation circles when the power supply is connected; after the power supply is stopped, the power is released, subsequently the dielectric plate and the grinding shaft can be conveniently returned, the linkage between structures is improved, the automation degree is relatively high, and relatively high practicability is realized; a convex disc rotates to make sure that the grinding shaft returns to an initial position; the grinding shaft is automatically pushed to return to the initial position; and the offset situation which may occur subsequently is prevented.

The invention relates to the technical field of sewage purification, and discloses a water quality purification pretreatment pipeline capable of preventing blockage and automatically dredging. The pipeline comprises a water pipe, a filter screen is fixedly mounted in the water pipe, a spring is fixedly mounted at the right end of the filter screen, and a flow limiting block is fixedly mounted at the right end of the spring. An electrode plate is fixedly installed at the left end of the flow limiting block, rolling wheels are fixedly installed at the top end of the inner wall of the water pipe,a buffer pipe is fixedly installed at the lower end of the water pipe, a baffle is movably installed at the top end of the buffer pipe, and a screw rod is rotationally installed on the right side ofthe bottom end of the buffer pipe. According to the water quality purification pretreatment pipeline capable of preventing blockage and achieving automatic dredging, when the sewage pipeline is blocked, the filter screen is automatically decontaminated, the situation that transportation is affected due to water pipe blockage caused by impurity accumulation is prevented, when too many impurities are accumulated, the groove plate is opened to discharge the impurities in a unified mode, later sewage purification is facilitated, and the sewage conveying efficiency is higher.

The invention relates to an aluminium-based lead silver alloy composite anode plate. The aluminium-based lead silver alloy composite anode plate comprises an aluminium or aluminium alloy electroconductive beam obtained through pressure casting, an electroconductive copper head casted at one end of the electroconductive beam through pressure casting, an anode plate array welded in a reserved hole below the aluminium alloy electroconductive beam, a plurality of insulators mounted on the anode plate array, and a beta-PbO2 layer or alpha-PbO2 / beta-PbO2 composite layer obtained on the surface of the anode plate array through electrodeposition, wherein the anode plate array comprises a plurality of aluminium plate lead silver alloy composite plates; the plate surfaces are connected into an integral body through the lead silver alloy pressure casting manner; clearances of the plate array is 6 mm to 15 mm; the aluminium plate lead silver alloy composite plates comprise aluminium or aluminium alloy plates of which the width is 30 mm to 150 mm and the thickness is 3 mm to 8 mm, and lead silver alloy which is pressed on the surfaces of the aluminium or aluminium alloy plates and is 3 mm to 10 mm in thickness; the lead silver alloy plates are fixed into an integral body on the two sides of the anode plate surfaces through insulated edge clamping strips; and a plurality of insulated clamps are mounted on the plate surfaces.

The invention relates to the technical field of packaging and sealing and discloses a sealing machine with adjustable sealing widths. The sealing machine comprises a conveying belt. Through grooves are formed in the conveying belt. A hot pressing roller and a wind box are arranged above the conveying belt. The wind box comprises a fan and is provided with first branch pipes. A wind guiding pipe is arranged under the conveying belt. Second branch pipes are arranged on the wind guiding pipe and directly face the first branch pipes. Each second branch pipe, the corresponding first branch pipe and the corresponding through groove form a ventilation set correspondingly. At least two ventilation sets are arranged. A shaft tube is arranged on the hot pressing roller in a penetrating mode and slidably connected with the hot pressing roller. The hot pressing roller comprises a first roller body and a second roller body. The first roller body is sleeved with the second roller body. The second roller body and the first roller body are slidably connected and both provided with heating sheets. One end of the wind guiding pipe faces the face, away from the second roller body, of the first roller body, and the other end of the wind guiding pipe faces the face, away from the first roller body, of the second roller body. The two ends of the wind guiding pipe extend in the axial direction of the first roller body. According to the sealing machine, the sealing widths of the sealing machine can be automatically adjusted.

The semiconductor memory device comprises: a select gate 3a formed in a first region on a substrate 1; the floating gate 6a formed in a second region adjacent to the first one; a second diffusion region 7b formed in a third region adjacent to the second one; and the control gate 11 formed on the floating gate. The coupling capacitance between the select gate 3a and the floating gate 6a is set smaller than that between the substrate 1 and the floating gate 6a. The thickness of a side wall 14a between the select gate 3a and the floating gate 6a is larger than that of an insulation film 5 between the substrate 1 and the floating gate 6a.To increase the ratio of the coupling capacitance between a floating gate and a control gate to the total capacitance, and to improve the reliability during the read-out operation.

The invention discloses a self-adaption temperature compensating capacitor. The self-adaption temperature compensating capacitor comprises a first pole plate, a second pole plate, a dielectric medium, a grounding conductor, a compensating conductor and an insulating washer, wherein the first pole plate, the second pole plate and the grounding conductor adopt metal materials with the same thermal expansion coefficient; one end of the compensating conductor stretches into between the first pole plate and the second pole plate to block part of opposite surfaces of the first pole plate and the second pole plate, and the other end of the compensating conductor is connected with the grounding conductor; the grounding conductor and the second pole plate are mounted in an insulating mode through the insulating washer; and the thermal expansion coefficient of the compensating conductor is more than that of the first pole plate and the second pole plate. The capacitance value of the capacitor is a fixed value at any temperature, so the capacitor can automatically compensate the temperature change, namely, the capacitance value can be correspondingly changed in an adaptive manner no matter the external how temperature is changed. The self-adaption temperature compensating capacitor can be applied to various kinds of electrical equipment, in particular precise measurement equipment.

The invention provides an electric power unit for a vehicle, which requires small numbers of parts and assembly processes and which is also capable of reducing the weight and securing the stiffness of a transmission case. A second gear case portion (22) housing a secondary reduction gear train (14) is provided integrally continuous to a rear end of a shaft case portion (21) housing a propeller shaft (11). A first opening portion (23) for inserting the propeller shaft (11) and a drive gear (17) of the secondary reduction gear train (14) and for attaching a first bearing (33) supporting a rear portion of the propeller shaft (11) is provided in a front end of the shaft case portion (21). In addition, a second opening portion (24) for inserting a driven gear (18) of the secondary reduction gear train (14) and a rear axle holder (48) holding a bearing (47) supporting a rear axle (12) is provided in one side portion of the second gear case portion (22).

The invention relates to the technical field of coating devices, and discloses a device for ensuring stirring uniformity and discharging quality. The device comprises a shell, a coil is rotatably mounted on the surface of the shell, a stirring rod is fixedly mounted at one end, close to the edge of the shell, of the coil, a heating resistance wire is fixedly mounted in the stirring rod, a contactis slidably installed on the surface of the heating resistance wire, an electromagnet is fixedly installed at the top end of the contact, a magnetic block is fixedly installed at the end, away from the coil, of the stirring rod, connecting rods are movably installed on the left side and the right side of the coil on the surface of the shell, and speed limiting blocks are fixedly installed at the ends, close to the coil, of the connecting rods. According to the device for guaranteeing the stirring uniformity and the discharging quality, the internal temperature is controlled, paint in the device is stirred, the temperature and the stirring degree are changed along with the viscosity degree of the current paint, when spraying is needed, a proper amount of paint is sprayed according to the current stirring efficiency, and the quality of the sprayed paint is guaranteed.

A linear motor armature in which pressure loss of a coolant flowing in a cooling conduit and possible significant non-uniformity in temperature distribution are reduced over the entire armature. A manifold 5, 6h and a pair of cooling conduits 7, 9 are configured such that a coolant is supplied from one connecting conduit 27 of the cooling conduit 7, and one connecting conduit 33 of the cooling conduit 9, and discharged from the other connecting conduit 29 of the cooling conduit 7 and the other connecting conduit 35 of the cooling conduit 9.

The invention discloses a combined electrode. The electrode comprises a negative electrode, a first intermediate electrode, a positive electrode and a second intermediate electrode, wherein a negative electrode main body portion and a first intermediate electrode main body portion, a negative electrode connecting portion and a first intermediate electrode connection portion are arranged in parallel and in a direct facing mode, and a positive electrode main body portion and a second intermediate electrode main body portion, a positive electrode connecting portion and a second intermediate electrode connection portion are arranged in parallel and in the direct facing mode so that direct facing areas between the negative electrode and the first intermediate electrode, and between the positive electrode and the second intermediate electrode are increased, current loop areas between the negative electrode and the first intermediate electrode, and between the positive electrode and the second intermediate electrode are reduced and a stray inductance and losses of the combined electrode are effectively reduced. The invention also discloses a three-level high power module adopting the combined electrode. A stray inductance and losses of the power module are effectively reduced.

The invention relates to a novel metalizing polypropylene thin film capacitor, which is internally provided with two layers of single remaining edge evaporation polypropylene films which are mutually superimposed, wherein at least one layer of polypropylene film is superimposed on the non-superimposing surface of the at least one layer of single remaining edge evaporation polypropylene film; the single remaining edge evaporation polypropylene films comprise basal films and aluminium coating evaporated on the basal films; the spacing remained between one side of the aluminium coating and one side of the basal film is 0.4mm; the thickness of the basal film is 3mum to 12 mum; the capacitor has small sheet resistance, thickening film layer, increases withstanding voltage, and simultaneously, has augmented lateral area and contact surface of a metal spaying layer, stable exhaustion value and strong conducting fluid capacity; the distance of the remained edge is reduced, namely, aligning area of a polar plate is increased and the capacitance is amplified, while the capacitance volume ratio becomes smaller, the volume of the corresponding capacitor is reduced; therefore, the capacitor is suitable for being arranged in various small-sized electric equipment.

The invention belongs to the field of soft starting of a motor liquid, belongs to the technical field of a super-power slip frequency regulator of a vertical winding asynchronous electromotor, and in particular relates to an assembly pole plate of a super-power slip frequency regulator. The interior of an insulation electrolyte box is loaded with a liquid resistor, a fixed electrode assembly is arranged at a position, near to the bottom, of the insulation electrolyte box, a movable electrode assembly is arranged right above the fixed electrode assembly, an external driving device can be used for driving the movable electrode assembly to vertically move in the insulation electrolyte box, and the movable electrode assembly can downwards move to be contacted and matched with the fixed electrode assembly; during the descending process of the movable electrode assembly, a stator current of a motor is used as a judgment criterion for a descending speed of the movable electrode assembly, the larger the current difference value is, the faster the descending speed is, and the current difference value is a difference value between a stator current actual value and a stator current set value; during the rising process, the movable electrode assembly is lifted to a predetermined position before the motor discharges, so that impact current of the electromotor to a power grid is avoided; and the predetermined position is set generally according to the descending amplitude of a rotational speed of the electromotor caused by the discharge of the motor.