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38results about How to "Solve breakdown problem" patented technology
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Touch control panel and touch control display device including same
ActiveCN103246406ASolve the instantaneous breakdown of static electricitySolve breakdown problemInput/output processes for data processingDisplay deviceElectrode
The invention provides a touch control panel and a touch control display device including the same. The touch control panel comprises a plurality of first sensing electrodes arranged in lines and a plurality of second sensing electrodes arranged in rows, wherein the first sensing electrodes and the second sensing electrodes are arranged in a staggered mode, the first sensing electrodes are provided with first connecting portions so as to achieve connection, the second sensing electrodes are separated, and each first sensing electrode comprises a sensing portion and an extending portion. The extending portions extend into adjacent second sensing electrodes. Any one of multiple insulating layers comprises a first portion and a second portion, wherein the first portion is covered on first connecting portions of the first sensing electrodes, and the second portion is covered on the extending portions of the first sensing electrodes. Multiple jumper wires are located on the insulating layers and partial second sensing electrodes and are electrically connected with any two adjacent second sensing electrodes.
Owner:INNOCOM TECH SHENZHEN +1
Battery protection circuit
PendingCN112152288AHigh pressureReduce chip area and costEmergency protective circuit arrangementsElectric powerElectrical batteryElectric energy
The invention provides a battery protection circuit which is characterized in that a clamping circuit is added to an existing battery protection circuit, a first end of the clamping circuit is connected with a power supply voltage sampling point, a second end of the clamping circuit and a negative electrode of a battery are connected to the ground, and a third end of the clamping circuit is connected with a loop current sampling point; and the loop current sampling point is located at the negative electrode of a charging power supply or load side. The clamping circuit receives electric energyfrom a power supply voltage sampling point, detects a voltage value on a loop current sampling point, and carries out clamping processing on the loop current sampling point when negative high voltageoccurs at the loop current sampling point, thereby effectively solving a problem that a chip is damaged because a low-voltage switching tube is broken down by the negative high voltage. The high voltage resistance of the battery protection chip is achieved while the low-voltage switching tube is used, and the area and cost of the chip are reduced.
Owner:SHENZHEN ICM MICROELECTRONICS CO LTD
Multifunction safety knife switch
InactiveCN101038821AImprove safety and reliability performanceSolve the problem of temperature riseElectronic switchingMagnetic/electric field switchesMode controlEngineering
The invention discloses a multifunctional safe guillotine which mainly comprises following circuits, opening and closing of the guillotine are identified by an opening and closing instruction and controlled by a control circuit so that opening and closing manners of the guillotine are restriction mode control. A zero-past pulse instruction signal is obtained by a zero-past sampling circuit, thereby an impact phenomenon of voltage and current is not generated on the circuit when the guillotine is opened or closed, and the instruction signal provides a count time for work time sequence of an arc suppression circuit and an operation circuit; an automatic switch between a contactless work mode and a contact work mode is timely done by a count control circuit, the arc suppression, operation circuits and a closing control circuit, so that the guillotine is in the contactless work mode when turning on and turning off power source to avoid generation of an impact phenomenon of electric arc and current; the guillotine is in the contact work mode when being in normal operation, thereby solving a problem of temperature increase during operation process. A safe locking function and a plurality of protection functions further increase safety and reliability for the usage of the guillotine.
Owner:郭胜利 +1
Portable oxygen generator self-adaptive to altitude and oxygen generation method
PendingCN111517281ASolve problemsSolve breakdown problemControllers with particular characteristicsSpecific gas purification/separationFlow transducerControl cell
The invention relates to a portable oxygen generator self-adaptive to altitude and an oxygen generation method. The oxygen generator comprises a compressor, an oxygen generation unit, an oxygen buffertank and a control unit, wherein a flow sensor is arranged behind the compressor; the compressor and the flow sensor are connected with the control unit; the flow sensor is used for monitoring the output flow value of the compressor in real time and transmitting an output flow value to the control unit; a compressed air flow threshold value required by a current oxygen production amount is storedin the control unit; the control unit is used for receiving the output flow value, monitored in real time, of the compressor, comparing the output flow value with the compressed air flow threshold value, and conducting PID closed-loop feedback according to a comparison result to adjust the rotating speed of the compressor until the output flow value is matched with the compressed air flow threshold value. According to the invention, the problems of insufficient flow of the compressor caused by elevation of the altitude and inflow air breakdown of the oxygen generation unit caused by overlargeflow of the compressor due to reduction of the altitude can be fundamentally solved, and self-adaption to altitude is realized.
Owner:可孚医疗科技股份有限公司
Molding method of automotive interior part with multilayered structure
The invention relates to a molding method of an automotive interior part with a multilayered structure. The molding method comprises the following steps: S1, starting a first heating device; heating and softening leather without patterns and then putting the leather into a mold cavity of a concave die; S2, carrying out die assembly; starting vacuum equipment and pressurizing equipment at the same time so that the leather is tightly stuck on the mold cavity surface of the concave die; S3, injecting fused resin; molding the resin and sticking the resin with the leather; meanwhile, copying the patterns of the mold cavity surface of the concave die onto the leather; and S4, carrying out die sinking and taking out the automotive interior part with the multilayered structure. The automotive interior part with the multilayered structure is molded through a one-step method, so that the problems of a low-pressure injection molding method of material leakage, puncturing, folds and non-uniform depths of the surface leather patterns are solved; and the method can avoid disadvantages of a glue covering process that procedures are complicated, toxicity and harms exist and the like.
Owner:SHANGHAIK YANFENG JINQIAO AUTOMOTIVE TRIM SYSTEMS CO LTD
Novel intermediate joint based on cable chilling contraction
The invention discloses a novel intermediate joint based on cable chilling contraction. The novel intermediate joint comprises two cable conductors at the jointing position and a conductor connecting pipe used for connecting the cable conductors. An insulating layer wraps each cable conductor in a squeeze manner. An integral intermediate joint body of a chilling-contraction cable accessory is arranged outside the insulating layers. An integral armor layer is arranged outside the intermediate joint body of the chilling-contraction cable accessory. A shielding tile with the outer diameter identical to that of each insulating layer is arranged on the conductor connecting pipe. A conventional semiconductive-band wrapping layer is replaced by the shielding tile, so that the problem that a semiconductive band is brought into the insulating layers by friction between a supporting strip and the semiconductive band during pulling of the supporting strip to cause product breakdown during operation in the prior art is solved, and the problem that the semiconductive band has uneven viscidity, a twisted semiconductive band may be loosened during mounting to be brought into the insulating layers to cause product quality accidents in the prior art is also solved.
Owner:JIANGSU ZHONGTIAN TECH CABLE ACCESSORIES CO LTD
Control method and control device for multilevel inverter, and inverter
The invention provides a control method for a multilevel inverter, and is applied to a multilevel inverter circuit. The multilevel inverter circuit comprises a first capacitor, a second capacitor, a third capacitor and eight switching branch circuits. In the control method, when a wave enveloping signal is received, the third and fourth switching branch circuits are controlled to be switched on, and the other switching branch circuits are controlled to be switched off. No voltage is borne at the two ends in the third switching branch circuit by switching on the third switching branch circuit, and meanwhile, no voltage is also borne at the two ends in the fourth switching branch circuit by switching on the fourth switching branch circuit, so that the problem of switching tube breakdown caused by high voltage stress on a switching tube during wave enveloping in the prior art is solved. In addition, according to the scheme, after a preset time is reached, the third and fourth switching branch circuits are also controlled to be switched off to make the multilevel inverter in an off state.
Owner:SUNGROW POWER SUPPLY CO LTD
A method for controlling a variable moment of inertia permanent magnet synchronous motor
ActiveCN109245634AFast speed convergenceIncrease the ability to resist external load interferenceElectric motor controlCurrent controllersMoment of inertia factorPermanent magnet synchronous motor
A method for controlling variable moment of inertia permanent magnet synchronous motor is disclosed. The information of variable moment of inertia factor of permanent magnet synchronous motor load isobtained, the parameter table of variable moment of inertia factor is established, so that that error information is obtain, is corrected according to the empirical parameters of actual products, andis introduced to the control algorithm of the permanent magnet synchronous motor. The method mainly includes the variable moment of inertia factor information parameter acquisition, variable moment ofinertia factor parameter table, current parameter algorithm, variable inertia electromagnetic torque algorithm, variable inertia Laplace algorithm, variable inertia angular velocity algorithm, variable inertia control model. The invention can make the fan realize fast speed convergence, The corresponding time of the input speed of the step response is greatly reduced, the setup time of the speedstabilization is greatly shortened, the ability of resisting external load disturbance of the fan is increased, the downwind startup and the upwind startup are realized, the stable speed operation against the large upwind is realized in the operation process, and the reliability and safety of the operation are enhanced.
Owner:TONGREN POLYTECHNIC COLLEGE
Mechanical-based heat treatment device for flanged steel pot products
InactiveCN111235362ASolve breakdown problemEnvironmentally friendly structural featuresDirt cleaningFurnace typesRotational axisCircular disc
The invention discloses a mechanical-based heat treatment device for flanged steel pot products, and relates to the technical field of auxiliary tool structures. The problem that breakdown of existingsteel pot products is caused when the existing steel pot products are blued by a high-frequency heating ring is solved, the device comprises a bottom plate, an adjusting plate and a treading and pressing mechanism, wherein a vertical cabin is installed on the left side of the top surface of the bottom plate, a top base with a rectangular plate structure is further supported and welded on the topsurface of the vertical cabin, a rectangular storage cavity is formed in the front side of the vertical cabin, a low-speed motor is installed in the storage cavity of the vertical cabin, the axial direction of the low-speed motor extends upwards from the top position of the top base, a discoid rotating plate is installed on a motor shaft of the low-speed motor, and a stand column is vertically welded to the left rear side of the top surface of the top base. By means of the mechanism, polluted smoke generated in a bluing process can be discharged outwards to the maximum extent, the environment-friendly structural characteristic is achieved, a pushing and pressing type discharging mechanism is further arranged, a steel pot falling on the rotating plate can be discharged towards one side, andthe functional structure is further improved.
Owner:天威英利
Modified silicon oil for oil type antioxidant thin film of metalized capacitor
The invention relates to modified silicon oil for an oil type antioxidant thin film of a metalized capacitor and relates to the technical field of capacitors. The thin film is prepared from the following components in parts by weight: 35-45 parts of methylsilicone oil, 4-6 parts of diphenyldimethoxysilane, 1-3 parts of epoxy resin, 4-6 parts of peanut oil, 4-6 parts of methyltrissilane, 1-2.5 parts of a coupling agent, 2-3 parts of paroline, 2-3 parts of hexamethyldisiloxane and 2-3 parts of a crosslinking agent. The modified silicon oil provided by the invention is simple in component, low in cost, non-toxic and free of corrosion and impurities and has a good using performance. A silicon oil protective layer is arranged on the whole metal layer to be isolated from air to prevent aluminum and zinc from being oxidized by air, so that the oxidation resistance of the metalized thin film is improved and the thin film is prevented from being oxidized and broken down in the process of manufacturing a capacitor, thereby greatly improving the quality of the capacitor which is manufactured by using the metalized film. Meanwhile, the problem that a large-capacity capacitor is too large in capacity and heat is hard to emit so as to lead to breakdown is solved. The oil protective layer has the compact binding and radiating functions and is capable enhancing the firmness among the plated layers, so that the metal layer is effectively prevented from falling.
Owner:TONGLING XINTAI ELECTRIC APP & CAPACITOR
Preparation method of integrally prefabricated intermediate joint
InactiveCN111049071AEliminate joint problemsSolve breakdown problemApparatus for joining/termination cablesPower cableMechanical engineering
The invention relates to the technical field of accessories of crosslinked polyethylene insulated power cables, and discloses a preparation method of an integrally prefabricated intermediate joint. The method comprises the following steps: injecting semi-conductive rubber into a mold by using a rubber injection machine to prepare stress cones at two ends and a high-voltage shield in the middle, injecting the semi-conductive rubber into the mold by using the rubber injection machine to prepare a stress cone insulation shield, and finally injecting insulation rubber into the stress cone and theinsulation shield to prepare the intermediate joint. According to the method, the die assembly seam on insulation is avoided, the problem caused by the fact that the shielding layer is thin is solved,the insulation performance is well guaranteed and the service life is longer.
Owner:安徽省浩辉电力股份有限公司
Mutually exclusive switching circuit
ActiveCN105743478AHas an isolation effectImprove reliabilityElectronic switchingCurrent limitingControl signal
The invention discloses a mutually exclusive switching circuit. The mutually exclusive switching circuit comprises a current limiting module, a time delay module and a first NAND gate; an input end of the current limiting module, an input end of the time delay module and a first input end of the first NAND gate are connected to a switching control signal; an output end of the current limiting module and an output end of the first NAND gate are connected to a one-way conduction module; and two output ends of the one-way conduction module are each connected with a switching device. The mutually exclusive switching circuit disclosed by the invention is simple in structure, low in cost and easy to realize; the conduction angle of the mutually exclusive switching circuit can be adjusted by setting a parameter of the time delay module; the condition that two switches are simultaneously conducted in a critical state due to overlapping of the conduction angles can be effectively prevented; short circuit of the circuit is avoided, so that components are prevented from being burned; by means of electrical isolation, the mutually exclusive switching circuit can be used in a high-power occasion and is safe to use; and the problem that the switch is broken down easily in the mutually exclusive switching circuit in the prior art can be effectively solved.
Owner:山东泰开电力开关有限公司
High-performance giant electrorheological elastomer and preparation and test method thereof
ActiveCN113214648AEnhanced dipole-charge interactionsHigh relative electrorheological effectMaterial strength using tensile/compressive forcesElectrically conductivePolymer chemistry
The invention relates to the technical field of chemical engineering, in particular to a high-performance giant electrorheological elastomer and a preparation and test method thereof. The high-performance giant electrorheological elastomer comprises electrorheological particles, conductive metal particles, a PDMS polymer and silicone oil; the electrorheological particles and the conductive metal particles form double dispersed phases; the PDMS polymer and the silicone oil form a bicontinuous phase; the electrorheological particles and the conductive metal particles are dispersed in the bicontinuous phase; the conductive metal particles are made of gold and silver; the conductive metal particles are sheet-shaped; and the particle size of the conductive metal particles is 0.1-100 microns. The preparation method has the following advantages that the compression modulus in the direction parallel to an electric field and the shear modulus in the direction perpendicular to the electric field are improved by adding the conductive metal particles and optimizing the adding amount, meanwhile, the problem of conductive breakdown is avoided, and meanwhile, the relatively high electrorheological effect is achieved by adding the urea-wrapped titanoxyl barium oxalate; and an external electric field can be quickly responded, and good time stability and good self-healing performance are achieved.
Owner:SHANGHAI UNIV
Low-loss metallized film
InactiveCN107301917ALow oxidation temperatureSlow oxidationFixed capacitor electrodesThin/thick film capacitorAntioxidant capacityPolyolefin
The present invention relates to a low-loss metallized film comprising a dielectric base film. A silver-zinc-aluminum composite metal layer is arranged on the dielectric base film, an aluminum-plated layer is arranged on the surface of the silver-zinc-aluminum composite metal layer, the surface of the aluminum-plated layer is provided with a carbon nano tube layer, the surface of the carbon nano tube layer is provided with a seal oil protective layer, the dielectric base film is a polypropylene film or a polyolefin film, and the seal oil protective layer is made of methyl silicone oil. The metalized film of the invention has high anti-oxidation ability, prevents the film from being oxidized and broken during the process of making capacitors, has low metal layer loss, and solves the problem that the metalized film heat is hard to emit resulting in the continuous oxidative breakdown. The invention also discloses a processing method of the above low-loss metallized film.
Owner:ANHUI NINGGUO HAIWEI ELECTRONICS
Novel semi-conductive non-water-blocking buffer cushion layer high-voltage power cable
PendingCN114334232AImprove securityImprove reliabilityPower cables with screens/conductive layersInsulated cablesPower cableInsulation layer
The invention relates to the technical field of high-voltage power cables, in particular to a novel semi-conductive non-water-blocking buffer cushion layer high-voltage power cable. Comprising a conductor, a wrapping semi-conductive nylon tape, an ultra-clean XLPE insulating layer, a semi-conductive non-water-blocking buffer tape, a corrugated aluminum sheath, cable asphalt, an insulating outer sheath and a graphite coating are sequentially arranged outside the conductor, and an ultra-smooth semi-conductive layer is arranged between the inner layer of the ultra-clean XLPE insulating layer and the wrapping semi-conductive nylon tape. And an ultra-smooth insulation shielding layer is arranged between the outer layer of the ultra-clean XLPE insulation layer and the semi-conductive non-water-blocking buffer strip. The cable can effectively solve the problem of body breakdown caused by corrosion of white substances generated by water absorption of water-blocking powder in the industry, and improves the use safety and reliability of the high-voltage power cable.
Owner:HANGZHOU CABLE
Manufacturing method of semiconductor device
ActiveCN103187279AImprove breakdown voltageSolve breakdown problemSolid-state devicesSemiconductor/solid-state device manufacturingLDMOSCMOS
The invention discloses a manufacturing method of a semiconductor device, and relates to the field of semiconductor manufacturing. The manufacturing method of the semiconductor solves the problem that laterally diffused metal oxide semiconductor (LDMOS) devices break down due to the fact that silicon on the edges of an oxide layer of a LDMOS drift region is easy to be exposed. According to the technical scheme, the manufacturing method of the semiconductor device includes the following steps: a, providing a semiconductor substrate, wherein the semiconductor substrate comprises a LDMOS area and a complementary metal-oxide-semiconductor transistor (CMOS) area; b, forming a sacrificial oxide layer on the semiconductor substrate; c, removing the sacrificial oxide layer; d, forming a masking layer on the semiconductor substrate which is processed with the sacrificial oxide layer; e, forming the LDMOS drift region by using the masking layer as a masking film and forming the drift region oxide layer on the drift region; f, removing the masking layer. The manufacturing method of the semiconductor device is suitable for bipolar-CMOS-DMOS (BCD) technology and the like.
Owner:CSMC TECH FAB2 CO LTD
Grid electrode protection circuit for field effect transistors connected in series
InactiveCN105006958ASolve breakdown problemImprove high voltage rangeElectronic switchingPhotovoltaic energy generationControl signalElectric power
The invention discloses a grid electrode protection circuit for field effect transistors connected in series. The grid electrode protection circuit comprises a circuit formed by series connection of more than one field effect transistor, grid electrodes of the field effect transistors are connected with a diode in series, a negative electrode of the diode is connected with the grid electrodes of the field effect transistors, a positive electrode of the diode is connected with a grid electrode control signal input terminal provided by the circuit in a unified manner, an equalizing resistor is connected between a drain electrode and a source electrode of each field effect transistor in parallel, and a voltage-releasing resistor is connected between the grid electrode and the source electrode of each field effect transistor in parallel. According to the circuit formed by series connection of more than one field effect transistor, the grid electrode of each field effect transistor is connected with one diode in series except for the grid electrode of the field effect transistor at a grounding terminal so that the problem that when the field effect transistors connected in series are turned off, the grid voltage is above the limit and causes breakdown is solved, the high-voltage-resistant range of the field effect transistors is extended, and the circuit can be widely applied in the photovoltaic, wind energy, and power electronics fields.
Owner:绍兴合田新能源有限公司
Distributed hierarchical overvoltage control system and method
ActiveCN103490400BAvoid destructionGuaranteed uptimeFlexible AC transmissionReactive power adjustment/elimination/compensationOvervoltageBusbar
The invention discloses a distributed level overvoltage control system and method. The system comprises a combined overvoltage protector, an energy absorber, a connecting electric reactor, a power unit, a power unit clamping voltage limiter, a laminated busbar and an IGBT induced voltage clamping device. After the energy absorber is subjected to parallel connection with the connecting electric reactor, one end of the energy absorber and the connecting electric reactor is connected with the combined overvoltage protector, the other end of the energy absorber and the connecting electric reactor is connected with the power unit, and the power unit clamping voltage limiter and the laminated busbar are respectively connected with the power unit. Five-grade defense is adopted in the distributed level overvoltage control system and method, overvoltage energy from various aspects can be suppressed, and damage to an IGBT caused by dangerous overvoltage of cut-off overvoltage, IGBT off-state overvoltage and the like of the device overvoltage invading the connecting electric reactor can be avoided, so that safe and reliable operation of an SVG device is ensured. The system and method are simple to operate and high in working efficiency and prolong the service life of the SVG device.
Owner:ANHUI HEKAI ELECTRICAL TECH CO LTD
A Control Method of Permanent Magnet Synchronous Motor with Variable Moment of Inertia
ActiveCN109245634BFast speed convergenceIncrease the ability to resist external load interferenceElectric motor controlCurrent controllersClassical mechanicsPermanent magnet synchronous motor
The invention discloses a method for controlling a permanent magnet synchronous motor with variable rotational inertia. The method is mainly to establish a variable rotational inertia factor parameter table by acquiring the variation factor information of the variable rotational inertia of the permanent magnet synchronous motor load, obtain its error information, and combine the actual The empirical parameters of the product are corrected and introduced into the control algorithm of the permanent magnet synchronous motor, which mainly includes the acquisition of the variable factor information parameter of the variable inertia, the variable inertia factor parameter table, the current parameter algorithm, the variable inertia electromagnetic torque algorithm, and the variable inertia. Laplace algorithm, variable inertia angular velocity algorithm, variable inertia control model. The invention can make the fan realize rapid speed convergence, greatly reduce the speed response time of the step response input, greatly shorten the establishment time of the speed stability, increase the anti-interference ability of the external load of the fan, and realize the downwind start and the headwind start. The anti-wind and stable speed operation during operation enhances the reliability and safety of operation.
Owner:TONGREN POLYTECHNIC COLLEGE
35kv cold shrinking joint
ActiveCN107769147AAvoid it happening againGuaranteed stabilityCable junctionsElectrical conductorVulcanization
The invention discloses a 35kv cold shrinking joint. The cold shrinking joint comprises a connecting pipe, a semi-conductive band, insulation bodies, a cold shrinking intermediate joint pipe, a semi-conductive layer, a constant-force spring, a copper shielding layer, a cable inner sheath, an inner protecting layer, a copper braided wire, an armored layer, an outer protecting layer and a cable outer sheath, the insulation bodies are molded by injection and vulcanization in a factory by employing silicone rubber, parts of the cold shrinking joint are molded by injection and vulcanization by employing materials same as the insulation bodies and then form parts of various cable accessories through diameter expansion and match of plastic supporting objects, the connecting pipe is used for connecting two cable conductors, and each cable conductor, located at two sides of the connecting pipe and the semi-conductive band, is provided with the insulation bodies in an extruding manner. The beneficial effects of the cold shrinking joint are that the size is small, the weight is low, safety and reliability are achieved, the installation is convenient, and the stability between the cable accessories is maintained.
Owner:ANHUI YIFALA ELECTRICAL CO LTD
Three-level clamping topology circuit for direct-current frequency conversion and direct-current frequency conversion equipment
The invention relates to the technical field of direct-current frequency conversion, and discloses a three-level clamping topology circuit for direct-current frequency conversion and direct-current frequency conversion equipment. The three-level clamping topology circuit for direct-current frequency conversion is characterized in that an anode of a first clamping diode D5 and a cathode of a second clamping diode D6 are connected in parallel to the same point N in the three-level clamping topology circuit for direct-current frequency conversion; and a resistor R is connected in series between the cathode of the first clamping diode D5 and the anode of the second clamping diode D6. Therefore, the problem that a device is broken down by overvoltage due to non-uniform cut-off voltage of the direct-current frequency conversion equipment is solved, and the stability and the safety of the direct-current frequency conversion equipment are improved.
Owner:QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +2
Cable for compound motion of servo electric torque fastener
PendingCN106297972ASolve breakdown problemTroubleshooting Cable FailuresFlexible cablesFlexible conductorsFastenerPower transmission
The present invention provides cable for compound motion of a servo electric torque fastener. The cable comprises a cable core and an outer sheath coated at the exterior of the cable core; the cable core includes four power transmission insulation wires and at least six signal control wires; each signal control wire includes a pair twist set formed by two insulation wires; a belting of the first layer of non-absorbent materials, a metal shielding layer and a belting of second layer of non-absorbent materials are arranged at the exterior of the pair twist set; the cable core includes an inner cable core and an outer cable core; the inner cable core includes two or three power transmission insulation wires and fillings; the inner cable core is coated with the belting of the non-absorbent materials; and the outer cable core is residual power transmission insulation wires and all the signal control wires. The cable for compound motion of the servo electric torque fastener has good low-temperature flexibility in the low-temperature state and cannot have the problems that the insulation wires and the outer sheath are subjected to cracking, breaking and brittle rupture so as to result in cable breakdown and cable failure.
Owner:SHUOCHENG INTELLIGENT TECH SHANGHAI CO LTD
A cvt capacitance online monitoring method based on cvt secondary voltage monitoring
ActiveCN105548943BSolve breakdown problemGuaranteed uptimeElectrical measurementsCapacitanceMonitoring system
Owner:CHINA SOUTHERN POWER GRID EHV POWER TRANSMISSION COMPANY WUZHOU BUREAU
Controllable silicon closing time prolonging control technology for motorcycle fuel saving rectifier
InactiveCN103219871ASolve breakdown problemSolve temperature problemsPower conversion systemsTime extensionCapacitance
The invention discloses a controllable silicon closing time prolonging control technology for a motorcycle fuel saving rectifier. The controllable silicon closing time prolonging control technology consists of a controllable rectifying part and a voltage stabilizing part, and is characterized in that the controllable rectifying part mainly comprises controllable silicon and a rectifying diode. When the voltage of a storage battery is up to the break-over voltage set by the voltage stabilizing part, the voltage of the control pole of the controllable silicon is reset, and the output current of the controllable rectifying part falls rapidly to a voltage stabilizing state; and if an electrical appliance is loaded at the moment, the voltage of the storage battery falls, the voltage at the control pole of the controllable silicon starts to rise, electric energy is absorbed by a delay capacitor, and the time of voltage rise is prolonged by 30 percent, so that the closing time of the controllable silicon is prolonged effectively, and the switching speed of the controllable silicon is lowered. Due to the adoption of the controllable silicon closing time prolonging control technology, the effect of prolonging the closing time of the anode and cathode of the controllable silicon is achieved, the overall temperature is lowered, and the engine fuel oil waste is reduced.
Owner:NANAN LIUCHENG GAOJIE GRAPHICS DESIGNER WORK STUDIO
Motor stator and motor using same
PendingCN114552811ASolve breakdown problemSolve the problem of number distributionMagnetic circuit stationary partsWindings conductor shape/form/constructionElectrical conductorElectric machine
The invention provides a motor stator and a motor using the same. The motor stator comprises a stator iron core which is provided with a stator slot, the stator slot comprises a plurality of slot layers, and the slot layers are arranged along the radial direction of the stator iron core; the stator winding is inserted into the stator slots, the stator winding comprises a plurality of first conductors and a plurality of second conductors, and each of the first conductors and the second conductors comprises two linear segment parts; wherein the linear segment parts of the plurality of first conductors are respectively located in two adjacent slot layers, each of the first conductors and the second conductor comprises two linear segment parts, and one linear segment part of the second conductor and one linear segment part of the first conductor are located in the same stator slot; the polar distance of the stator winding is tau, the pitch of the second conductors is y2, the distance between the linear segment parts of the two adjacent first conductors in the same slot layer is L1, and the distance between the linear end parts of the adjacent second conductors is L2. The height of the bending part of the stator coil can be reduced, and the motor efficiency is improved.
Owner:ZHEJIANG ZEEKR INTELLIGENT TECH CO LTD +2
Control method, control device and inverter of multilevel inverter
The invention provides a control method for a multilevel inverter, and is applied to a multilevel inverter circuit. The multilevel inverter circuit comprises a first capacitor, a second capacitor, a third capacitor and eight switching branch circuits. In the control method, when a wave enveloping signal is received, the third and fourth switching branch circuits are controlled to be switched on, and the other switching branch circuits are controlled to be switched off. No voltage is borne at the two ends in the third switching branch circuit by switching on the third switching branch circuit, and meanwhile, no voltage is also borne at the two ends in the fourth switching branch circuit by switching on the fourth switching branch circuit, so that the problem of switching tube breakdown caused by high voltage stress on a switching tube during wave enveloping in the prior art is solved. In addition, according to the scheme, after a preset time is reached, the third and fourth switching branch circuits are also controlled to be switched off to make the multilevel inverter in an off state.
Owner:SUNGROW POWER SUPPLY CO LTD
An Online Monitoring Method of CVT Capacitance Based on Zero Sequence Voltage Monitoring
ActiveCN105589052BSolve breakdown problemGuaranteed uptimeElectrical measurementsCapacitanceMonitoring system
The invention discloses a CVT capacitance on-line monitoring method based on zero sequence voltage monitoring. The method comprises the steps of: S10, parallelly reading the zero sequence voltage of at least one CVT by a plant station monitoring system, wherein the zero sequence voltage is normal if only deviating from normal values; S20, querying each CVT for detecting whether each zero sequence voltage exceeds a first voltage threshold, and for one CVT, if the zero sequence voltage thereof is larger than or equal to the first voltage threshold, entering a step S30; and S30, counting the abnormity duration time of zero sequence voltage of the CVT, judging whether the zero sequence voltage of the CVT exceeds a second voltage threshold, if the zero sequence voltage is smaller than the second voltage threshold and the duration time is larger than a first set time, then determining that the capacitance of the CVT is broken down. The operation condition of the CVT capacitance is accurately judged by the utilization of the zero sequence voltage of the CVT, deep processing is carried out by the utilization data of the plant station monitoring system, no equipment needs to be added, and the reliability is improved.
Owner:CHINA SOUTHERN POWER GRID EHV POWER TRANSMISSION COMPANY WUZHOU BUREAU
An organic optoelectronic device
ActiveCN111048567BNormal work does not affectExtended service lifeSolid-state devicesSemiconductor/solid-state device manufacturingTerminal voltageEngineering
The present application discloses an organic optoelectronic device, comprising a substrate, and a first electrode layer, an organic functional layer and a second electrode layer sequentially formed on the substrate; There is an over-electric confinement layer in parallel with the organic functional layer, and the over-electric confinement layer is formed of a pressure-sensitive material. In the present application, an over-electricity limiting layer connected in parallel with the organic functional layer is provided between the first electrode layer and the second electrode layer of the organic optoelectronic device. The resistance of the electrical confinement layer becomes smaller, allowing the current to pass through the over-electric confinement layer without damaging the organic optoelectronic device. When the voltage returns to normal, the resistance of the over-electric confinement layer returns to infinity, and the organic optoelectronic device can work normally.
Owner:GUAN YEOLIGHT TECH CO LTD
A kind of PBT permanent antistatic material and its preparation method and application
Owner:东莞市富旺塑胶制品有限公司
Voltage-sharing element applied to power equipment and design method of voltage-sharing element
PendingCN113363956ASolve the problem of high charging rateImprove securityCurrent/voltage measurementInstrument screening arrangementsOvervoltageElectrical conductor
The invention belongs to the field of overvoltage protection, and particularly relates to a voltage-sharing element applied to power equipment and a design method of the voltage-sharing element. The problems of high research and development cost, long research and development period and the like caused by the fact that the structure of the current voltage-sharing element and the size matching of the current voltage-sharing element and power equipment are determined only by experience are solved. The voltage-sharing element comprises a barrel bottom and a barrel body; the barrel bottom is used for being electrically connected with a second conductor in the electrical equipment, the upper end of the barrel body is connected with the edge of the barrel bottom, the lower end of the barrel body extends towards a third conductor of an electrified part, and a radial gap is formed between the barrel body and part of the valve body close to the second conductor and is filled with an insulating medium; therefore, aging speed acceleration caused by serious heating in the operation process of the power equipment is prevented, and the operation safety and the protection reliability of the power equipment are greatly improved; meanwhile, by optimizing the effective height of the voltage-sharing element and the radial gap between the voltage-sharing element and the valve body, the discharge phenomenon between the valve body and the voltage-sharing element is avoided, and the protection reliability of the power equipment is further improved.
Owner:XIAN SHENDIAN ELECTRONICS +1
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