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40results about How to "Avoid breakdown damage" patented technology
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Optical module with strong light protection function
ActiveCN102299744AEffective protectionRealize hot-swapping functionElectromagnetic receiversArrangements responsive to excess voltageCurrent limitingOptical Module
The invention discloses an optical module with a blaze protection function. The optical module comprises a light reception assembly used for receiving a light signal, a boost circuit, a current mirror device and an MCU. The boost circuit sends high voltage generated by the boost circuit to a response current output terminal of the light reception assembly through the current mirror device and a current-limiting resistor. The current mirror device receives response current outputted by the light reception assembly, and sends the response current to the MCU after zoom processing. The MCU connects with boost voltage, and adjusts high voltage amplitude outputted by the boost circuit. According to the invention, a high voltage protection circuit is designed at a receiving end of the optical module, so that when a blaze reaches, the light reception assembly is prevented from breakdown and damage, and the optical module is effectively protected. At the same time, through employing a high integrated level transmit-receive one body chip to construct a module circuit, a circuit board dimension is reduced, a SFP interface packaging form is adapted, support of a digital diagnosis function is completed, and maintenance cost of a whole is reduced.
Owner:HISENSE BROADBAND MULTIMEDIA TECH
Solid combination switch device
ActiveCN101795003ASmall footprintReduce external wiringReactive power adjustment/elimination/compensationReactive power compensationElectric power systemHigh pressure
The invention provides a solid combination switch device which can switch a parallel capacitor to a system automatically; the device is mainly used for reactive compensation of a high-voltage electric power system, zero passage (arcless) conduction and cut-off of a high-voltage electric power capacitor set is carried out automatically by calculating the reactive power value of the system; the solid combination switch device mainly comprises that: a thyristor, a contactor, a thyristor energy delivery system and a control system are integrated into a combined mechanism in an equipment cabinet, and an external connecting wire only needs three-phase voltage, electric current signals and direct-current 220V control power supply to realize the combination switch which can automatically switch the parallel capacitor set.
Owner:CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2
Uniform discharge low-temperature plasma fabric processing device and method under intelligent atmospheric pressure
ActiveCN105442297AGood hygroscopicityExcellent adhesionUltrasonic/sonic fibre treatmentForeign matterControl system
The invention relates to a uniform discharge low-temperature plasma fabric processing device under intelligent atmospheric pressure. The uniform discharge low-temperature plasma fabric processing device under the intelligent atmospheric pressure comprises a main case and a cooling device, wherein a driving discharge roller and a fabric guide roller are arranged in the main case; a plurality of electrode groups are distributed surrounding the periphery of the driving discharge roller; the electrode groups are controlled by a drive mechanism to adhere the driving discharge roller or separate from the driving discharge roller; a laser sensor for detecting fabric joints or foreign matters is arranged on one end of the inlet of the driving discharge roller; automatic liquid dripping needle tubes and camera devices for acquiring water drop angle images are respectively arranged on one end of the inlet and one end of the outlet of the driving discharge roller; the drive mechanism, the laser sensor and the camera devices are respectively connected with a control system. According to the uniform discharge low-temperature plasma fabric processing device under the intelligent atmospheric pressure provided by the invention, the fabric is put in a continuously uniform electric field, so that the damage on the surface of the fabric due to uneven discharge can be effectively avoided; meanwhile, water drop angle data analyses are automatically carried out before and after processing, and the tension of the surface of the fabric after processing is intelligently controlled, so that the working efficiency and the processing yield are remarkably improved.
Owner:NANJING SUMAN PLASMA TECH CO LTD
Microwave oven, start control device of microwave oven variable-frequency power source, and method
ActiveCN105744667AGuaranteed stabilityGuaranteed reliabilityMicrowave heatingHome appliance efficiency improvementElectricityMicrowave oven
The invention discloses a start control device of a microwave oven variable-frequency power source. The start control device includes a variable frequency power source, a resonant voltage detecting module used for detecting the resonance voltage of the primary side of a transformer, a control module used for controlling the variable frequency power source to enter a soft start stage after the variable-frequency power source is electrified, controlling the variable frequency power source to enter a preheating stage after the soft start stage is completed, and controlling the variable frequency power source according to the resonance voltage in the preheating stage. The device can control the variable frequency power source through detecting the resonance voltage of the primary side of the transformer so as to realize accurate control on the anode voltage of a magnetron. The invention also discloses a microwave oven and a start control method of a microwave oven variable-frequency power source.
Owner:GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD +1
Stray current measuring method based on fast Fourier transform
InactiveCN106526296AAccurate protectionAccurate judgmentMeasurement using digital techniquesSteel pipelineVIT signals
The invention discloses a stray current measuring method based on fast Fourier transform. The stray current measuring method based on fast Fourier transform includes the following steps: acquiring stray electric signals of a buried steel pipeline; performing signal conditioning on the acquired stray electric signals, and obtaining continuous time domain analog signals; utilizing a high accuracy analog-to-digital conversion chip to sample the continuous time domain analog signals in a fixed sampling frequency f0, and performing analog-to-digital conversion to obtain discrete time domain data signals; and using a cycle T to perform Fourier transform on the N discrete time domain data signals to obtain frequency domain signals of 0Hz-508Hz. The stray current measuring system based on fast Fourier transform includes a detection circuit, a signal conditioning circuit, a sampling and analog-to-digital conversion module and a signal processing chip. The stray current measuring method and system based on fast Fourier transform can obtain the source and the magnitude of the stray current born by the test point according to the analysis result, can make an accurate determination about protection of the pipeline, and have the advantages of high interference immunity and high accuracy.
Owner:成都天誉立信科技有限公司
Composite particle with coated core-shell structure as well as preparation method and application of composite particle
ActiveCN108641039APromote absorptionEnhanced electron transport capabilitiesMaterial nanotechnologySolid-state devicesEmulsion polymerizationCore shell
The invention discloses a composite particle with a coated core-shell structure as well as a preparation method and application of the composite particle. The composite particle with the coated core-shell structure comprises an inner core structure as well as a shell layer I, a shell layer II and a shell layer III sequentially coating the inner core structure; the inner core structure is made of titanium dioxide; the shell layer I is made of aluminum oxide; the shell layer II is made of poly(styrene-divinylbenzene); and the shell layer III is made of poly(methyl methacrylate). The composite particle with the coated core-shell structure is prepared by multi-step emulsion polymerization, and the self-assembly of the particle can be realized under the induction of an ultralow voltage. Due tocoating modification of organic and inorganic materials, the prepared composite particle has excellent electrical response properties and has a relatively good application prospect in the photoelectric field.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Wind turbine generator blade anti-thunder air-terminal system
ActiveCN107956656ADoes not affect aerodynamic performanceGuaranteed to workMachines/enginesWind energy generationElectricityLightning strokes
The invention provides a wind turbine generator blade anti-thunder air-terminal system. The system comprises a blade tip air termination, a shielding device, a lower guiding body, and at least two pairs of blade intermediate air terminations. The blade tip air termination and each blade intermediate air termination are respectively arranged on the blade tip of a wind turbine generator blade and the position of a blade surface, far away from the blade tip. The lower guiding body is arranged in the wind turbine generator blade, one end is connected with the blade tip air termination, and the other end is connected with each pair of blade intermediate air terminations, and the lower guiding body is used to lead lightening current into ground. The shielding device is arranged on two surfaces of the wind turbine generator blade, one end is connected with the blade tip air termination, and the other end is connected with the blade intermediate air termination, and the shielding device is used to shield discharge effect of the surface of the lower guiding body. Through embedding the metal shielding device on a suction surface and a pressure surface of the blade, surface electric field ofthe internal lower guiding body can be effectively shielded, and possibility of discharge of the surface of the lower guiding body is reduced, so that probability of failure lightning protection caused by failure of an air-terminal structure is effectively reduced, and the number of lightning stroke subjected to the blade is reduced.
Owner:CHINA ELECTRIC POWER RES INST +2
Method for testing resonant power amplifying circuit
ActiveCN101893682AAvoid breakdown damageShorten the production cycleElectronic circuit testingPhysicsSelf excited
The invention discloses a method for testing a resonant power amplifying circuit which comprises a full-bridge series resonant power amplifier module, a transformer component, a self-excited voltage-controlled oscillator and a preamplifier. The method comprises the following steps: 1, providing a direct current (DC) voltage source, a signal source and an oscilloscope which are used for test; 2, judging whether the primary voltage-frequency property of the transformer component is normal or not; 3, judging whether the variation relationship between the working frequency and the power supply voltage of the resonant power amplifying circuit is normal; 4, testing whether the DC voltage waveform of the secondary output of the transformer component after rectification and filtration is normal or not; 5, testing the stability of the DC voltage waveform of the secondary output of the transformer component after rectification and filtration; and 6, if step 2 to step 5 are all qualified, judging that the resonant power amplifying circuit is tested to be qualified. The test method of the invention can effectively avoid breakdown damage on semiconductor power amplifying parts caused by part quality or circuit connection in production process.
Owner:ZHUHAI HOKAI MEDICAL INSTR +1
Device and method for testing pre-power short circuit protection of VR chip
ActiveCN109738791AAvoid breakdown damageTruly reflect the real working situationElectronic circuit testingTest efficiencyElectricity
The innovation of the invention proposes a device and a method for testing pre-power short circuit protection of a VR chip. By adding a voltage regulator module and adjusting the working timing of thepower supply terminal VCC and the voltage input terminal of the chip, the real working condition of the NCP4552x series chip can be truly reflected, thereby avoiding chip breakdown damage, improvingtest efficiency and reducing test costs.
Owner:INSPUR SUZHOU INTELLIGENT TECH CO LTD
Multi-channel synchronous testing device for high-voltage lightning arrester and using method of multi-channel synchronous testing device
PendingCN112731203ASimple and efficient operationRealize network operationOverload protection arrangementsShort-circuit testingVoltage generatorTelecommunications
The invention relates to the technical field of high-voltage lightning arrester testing, and provides a multi-channel synchronous testing device for a high-voltage lightning arrester and a using method of the multi-channel synchronous testing device. The multi-channel synchronous testing device for the high-voltage lightning arrester comprises a user test operation table, arapid voltage-regulating power supply, a direct-current high-voltage generator and a plurality of lightning arrester test objects, wherein the user test operation table is connected with the rapid voltage-regulating power supply through a control cable or an optical cable; the output end of the rapid voltage-regulating power supply is connected with the power supply input end of the direct-current high-voltage generator through a power supply cable; the high-voltage ends of the plurality of lightning arrester test objects are connected in parallel and then are electrically connected with the output end of the direct-current high-voltage generator; and the low-voltage ends of the plurality of lightning arrester test objects and the grounding end of the direct-current high-voltage generator are connected in parallel and grounded, the low-voltage end of each lightning arrester is provided with a current sampling device, and each current sampling device is connected with a user test operation table through a collection cable. The invention aims to provide a multi-channel synchronous testing device for high-voltage lightning arresters and a using method of the multi-channel synchronous testing device. The multi-channel synchronous testing device can test a plurality of high-voltage lightning arresters at the same time.
Owner:四川省绵竹西南电工设备有限责任公司
Bipolar high-voltage pulse power supply capable of generating uniform low-temperature plasma
ActiveCN112953291AReduce in quantityAvoid breakdown damageEfficient power electronics conversionPulse generation by energy-accumulating elementCapacitanceVoltage pulse
The invention discloses a bipolar high-voltage pulse power supply capable of generating uniform low-temperature plasma, and relates to the field of low-temperature plasmas. The bipolar high-voltage pulse power supply comprises a rectification filtering module, two resonance charging modules, a double-primary winding pulse transformer and a control module, each resonance charging module comprises a resonance inductor, a resonance diode, a resonance capacitor and a semiconductor switch, wherein one ends of the resonance inductors serve as input anode ends of the resonant charging modules, second ends of the semiconductor switches serve as an input cathode end and an output cathode end of the resonance charging modules, the other ends of the resonance capacitors serve as output anode ends of the resonant charging modules, one end of a secondary coil, the first end of a first primary coil and the first end of a second primary coil are dotted terminals respectively, the control module obtains bipolar high-voltage pulses on the secondary coil by controlling alternate conduction of the two semiconductor switches, the number of the semiconductor switches is reduced, and uniform low-temperature plasmas are generated more stably.
Owner:无锡复溪电子科技有限公司
Manufacturing method of semiconductor device
ActiveCN107492485AGuaranteed performanceAvoid breakdown damageSemiconductor/solid-state device manufacturingSemiconductor devicesGate oxideSemiconductor
The invention provides a manufacturing method of a semiconductor device. The method comprises the following steps of forming a grid oxide layer on a semiconductor base; forming a grid material layer on the grid oxide layer; and using a dry method etching technology to etch the grid material layer so as to form a grid electrode and carrying out deion processing on the grid material layer during a grid electrode formation process. In the invention, during a process of using the dry method etching technology to etch the grid material layer so as to form the grid electrode, deion processing is performed on the grid material layer so that conditions that excess ions are accumulated in the grid material layer and the grid oxide layer generates breakdown damages are avoided, and then integral performance of the semiconductor device can be guaranteed.
Owner:FOUNDER MICROELECTRONICS INT
High-voltage electric display device
InactiveCN108761177ASimple detection operationQuick repairIndicating presence of current/voltageCapacitanceElectricity
The invention provides a high-voltage electric display device. The device comprises a noncontact sensor and a controller which are interconnected, wherein the noncontact sensor is used for measuring the electricity of an electric body in a noncontact manner; the controller comprises a display module which is used for displaying the detection result of the noncontact sensor. With the adoption of the device, the problem of difficult electricity measuring and low reliability of a conventional high-voltage electric display device can be solved; the noncontact measuring is carried out to the strength of electric fields surrounding the electric body through the noncontact sensor in order to detect whether the electric body is electric, and the problem that the electric body is in non-electric connection which leads to breakdown damage of a capacitor can be avoided; the detection is simple; the detection result is displayed through the display module; the high-voltage electric display devicecan be rapidly overhauled; and the reliability can be improved.
Owner:GUANGDONG POWER GRID CO LTD +1
Silicone plastic package rectifier diode
InactiveCN103035739AElectrical characteristics are not affectedAvoid breakdown damageSemiconductor/solid-state device detailsSolid-state devicesEpoxyRectifier diodes
The invention relates to a silicone plastic package rectifier diode. The silicone plastic package rectifier diode comprises a diode main body which comprises a PN junction, a positive terminal and a negative terminal which are located on a same silicon substrate, the positive terminal and the negative terminal are respectively located at two ends of the silicon substrate, a leading-out line is respectively welded on the positive terminal and the negative terminal, the silicon substrate and partial leading-out lines welded with the positive terminal and the negative terminal are packaged in an epoxy resin tube in a plastic mode, and a coating capable of clearly displaying working parameters of the diode main body is coated outside the epoxy resin tube. The silicone plastic package rectifier diode is simple in structure, the diode main body is packaged in the epoxy resin tube in a plastic mode to guarantee that electrical characteristics of the diode main body are not influenced, the coating capable of clearly displaying working parameters of the diode main body is coated outside the epoxy resin tube to avoid changing into a tube which does not meet requirements for the working parameters when a new silicone plastic package rectifier diode is changed, and accordingly breakdown and damage of the silicone plastic package rectifier diode are avoided.
Owner:孔明
A constant temperature control system and control method for X-ray fluorescence spectrometer
ActiveCN104048981BImprove anti-interference abilityImprove performanceMaterial analysis using wave/particle radiationAuxillary controllers with auxillary heating devicesLinear controlHemt circuits
Owner:BEIJING ARITIME INTELLIGENT CONTROL
Device and method for testing short-circuit protection of a VR chip before power-on
ActiveCN109738791BAvoid breakdown damageTruly reflect the real working situationElectronic circuit testingVoltage regulator moduleShort circuit protection
The innovation of the invention proposes a device and a method for testing pre-power short circuit protection of a VR chip. By adding a voltage regulator module and adjusting the working timing of thepower supply terminal VCC and the voltage input terminal of the chip, the real working condition of the NCP4552x series chip can be truly reflected, thereby avoiding chip breakdown damage, improvingtest efficiency and reducing test costs.
Owner:INSPUR SUZHOU INTELLIGENT TECH CO LTD
Monoclonal antibody photoelectric protective film preparation method and monoclonal antibody photoelectric protective film
ActiveCN113457950BImprove yieldPrevent solidificationTransportation and packagingRotary stirring mixersToxic gasMembrane surface
The invention discloses a method for preparing a monoclonal anti-photoelectric protective film, comprising steps: S1, unwinding; S2, gluing; S3, drying; S4, winding; The glue solution in the tank is coated on the surface of the base film, and the glue solution in the glue tank is stirred by the stirring device, and the gas overflowing from the glue solution is absorbed by the suction device at the same time. In the preparation method of the monoclonal anti-photoelectric protective film of the present invention, the glue solution in the glue tank is stirred by setting a stirring device, so as to avoid the coagulation of the glue solution due to standing still for a long time, improve the yield rate of the double anti-photoelectric protective film, and simultaneously set the pumping The gas device can remove the toxic gas in time, prevent the toxic gas from being released into the air, and improve the working environment. The invention also discloses a monoclonal antibody photoelectric protective film.
Owner:芜湖夏鑫新型材料科技有限公司
Thyristor and its manufacturing method
ActiveCN109449204BLower on-resistanceLower forward voltage dropThyristorSemiconductor/solid-state device manufacturingEngineeringConduction loss
The present invention provides a thyristor comprising a substrate of the first conductivity type, a buried layer of the second conductivity type formed on the substrate, an epitaxial layer of the second conductivity type formed on the upper surface of the buried layer, and an epitaxial layer of the second conductivity type formed on the epitaxial layer A first implantation region of the first conductivity type on the upper surface, a second implantation region of the second conductivity type located in the first implantation region, extending from the lower surface of the substrate to a plurality of first conductivity type implants in the substrate at intervals The third implantation region, the oxide layer located at the junction between the first implantation region and the second implantation region, extends from the upper surface of the first implantation region to the first implantation region to open a trench located outside the oxide layer, The trench is filled with a polysilicon layer of the first conductivity type, a gate metal layer located on the first injection region and the upper surface of the polysilicon layer. The invention also provides a preparation method of the thyristor, which reduces the forward voltage drop and conduction loss of the thyristor, and improves the working efficiency and reliability of the thyristor.
Owner:上海领矽半导体有限公司
A kind of coated core-shell structure composite particle and its preparation method and application
ActiveCN108641039BPromote absorptionEnhanced electron transport capabilitiesMaterial nanotechnologySolid-state devicesPolymer scienceDivinylbenzene
The invention discloses a coated core-shell structure composite particle and its preparation method and application. The coated core-shell structure composite particle includes a core structure and a shell layer 1 and a shell layer 2 coated on the core structure in sequence. And shell three, the core structure is titanium dioxide, the shell one is aluminum oxide, the shell two is poly(styrene-divinylbenzene), and the shell three is polymethyl methacrylate . The invention prepares a composite particle with a coated core-shell structure through multi-step emulsion polymerization, which can realize particle self-assembly induced by ultra-low voltage. Through the coating modification of inorganic and organic materials, the prepared composite particles have excellent electrical response type, and have good application prospects in the field of optoelectronics.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Double-resistance photoelectric protection film preparation method and double-resistance photoelectric protection film
PendingCN113351456AImprove yieldGuaranteed uniformityLiquid surface applicatorsFilm/foil adhesivesMembrane surfaceEngineering
The invention discloses a double-resistance photoelectric protection film preparation method. The preparation method comprises the following steps of S1, unwinding; S2, gluing; S3, drying; and S4, rolling. In the step S2, the surface of a base film is coated with a glue solution through a glue spreader; and a scraper device is arranged on one side of the glue spreader and comprises a main scraper, a distance measuring element arranged on the main scraper and used for detecting the distance between the main scraper and the glue spreader, an auxiliary scraper located above the main scraper, and a scraper control mechanism used for controlling the auxiliary scraper to move between a glue scraping position and a non-glue scraping position. According to the double-resistance photoelectric protection film preparation method provided by the invention, the distance measuring element is arranged to be matched with the scraper control mechanism and the auxiliary scraper, so that the auxiliary scraper can be controlled to move to the glue scraping position in time when the main scraper is not located at the optimal glue scraping position, redundant glue on the glue spreader is scraped by the auxiliary scraper in time, and the yield of a double-resistance photoelectric protection film is increased. The invention also discloses the double-resistance photoelectric protection film.
Owner:芜湖夏鑫新型材料科技有限公司
A silicon carbide mosfet drive circuit
ActiveCN108683327BImprove reliabilityIncreased shutdown speedEfficient power electronics conversionElectronic switchingMOSFETHemt circuits
The invention provides a silicon carbide MOSFET driving circuit, which relates to the field of power conversion circuits. A PWM control circuit generates a PWM pulse signal. After the PWM pulse signalpasses through a driving signal amplifying circuit, a silicon carbide MOSFET switch is controlled by a resistor, and a power supply outputs +15V, 0V and -3V DC voltages. The +15V and -3V DC voltagessupply power to the driving signal amplifying circuit, and the 0V is connected to the source of the silicon carbide MOSFET. The silicon carbide MOSFET driving circuit utilizes the driving negative voltage shutdown to reduce crosstalk between the upper and lower tubes of the bridge arm circuit in the power electronic converter, avoiding the bridge arm direct connection, and improving the reliability of the silicon carbide MOSFET; the diode can clamp the gate voltage to a safe range, avoiding breakdown of the silicon carbide MOSFET gate; the circuit uses the MOS transistor M1 to form a dischargeloop, which speeds up the turn-off speed of the silicon carbide MOSFET, improves the switching speed of the silicon carbide MOSFET, and reduces the switching loss.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
An optical module, its signal output port, and a signal output port protection circuit
ActiveCN105162454BAvoid breakdown damageAvoid connectionReliability increasing modificationsLogic circuits using opto-electronic devicesOptical ModuleHemt circuits
The invention relates to the photoelectric field and especially relates to an optical module, a signal output port thereof and a signal output port protection circuit. According to the invention, an OC or OD protection circuit is arranged, an optical module chip is effectively prevented from being directly connected with a pull-up power supply HOST VCC on a host side, and the optical module chip is prevented from being broken down and damaged due to the overlarge HOST VCC. In some embodiments, an anti-phase circuit is arranged to ensure that the output of the OC or OD protection circuit is consistent with the output of the optical module chip signal output port.
Owner:SOURCE PHOTONICS CHENGDU
Power supply filter with high-efficiency electromagnetic isolation and heat dissipation functions
PendingCN112203465AImprove electromagnetic shielding performanceImprove electromagnetic compatibilityLocalised screeningCircuit arrangements on support structuresThermodynamicsHemt circuits
The invention discloses a power supply filter with high-efficiency electromagnetic isolation and heat dissipation functions. The power supply filter comprises a shell, a filter circuit arranged in theshell, a heat dissipation device, a lead welding device and an inductor mounting device, and is characterized in that the filter circuit comprises a heating device and a circular inductor which are connected with each other; a plurality of independent inner cavities which are isolated from one another through partition plates and used for installing different independent devices are formed in theouter shell, the heat dissipation device comprises heat conduction pieces with high heat conduction coefficients, and the heat conduction pieces are arranged between the corresponding heating devicesand the inner wall of the outer shell and make close contact with the corresponding heating devices and the inner wall of the outer shell respectively. and a plurality of convex radiating fins are arranged in an area, corresponding to the heating device, on the outer wall of the shell. Good electromagnetic shielding effect and high electromagnetic compatibility between electronic components can be realized, independent maintenance of part of the electronic components can also be realized, the use cost is saved, an efficient heat dissipation effect can be realized, and the high-power power supply filter is particularly suitable for high-power power supply filters.
Owner:CHENGDU HONGMING ELECTRONICS CO LTD
Safe and reliable mobile phone charger processing circuit
InactiveCN107069861AImprove the quality of power supplyLimit the maximum currentElectric powerBattery overcurrent protectionPower flowConductor Coil
The invention discloses a safe and reliable mobile phone charger processing circuit. The circuit is provided with two input ends and two output ends, and comprises a transformer, a first triode, a second triode, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first capacitor, a second capacitor, a third capacitor,. a fourth capacitor, a first resistor, a second resistor, a third resistor and a fourth resistor, wherein the transformer comprises a primary coil and a secondary coil, the primary coil comprises a primary winding and a secondary winding, the secondary winding is a sampling winding, and the fourth diode is a voltage stabilizing diode. Through setting a sampling resistor and a sampling winding, the safe and reliable mobile phone charger processing circuit not only can prevent the circuit current from being too large, but also can prevent the output voltage from being too high.
Owner:CHENGDU HONGSHAN TECH
A wind turbine blade lightning protection and lightning protection system
ActiveCN107956656BDoes not affect aerodynamic performanceGuaranteed to workMachines/enginesWind energy generationSuction forceLightning strokes
Owner:CHINA ELECTRIC POWER RES INST +2
Short circuit protection circuit
PendingCN113922794AImprove reliabilityImprove securityTransistorElectronic switchingControl signalHemt circuits
The invention relates to the technical field of analog circuits, and provides a short-circuit protection circuit which comprises an output circuit which is connected to the ground in series with a first resistor and provides a first control signal through a connection node of the output circuit and the first resistor; the control circuit is connected with the output circuit and is provided with a first input end for receiving a first control signal and a first output end, and the first output end is used for transmitting a second control signal to the output circuit; the drive circuit is connected with the control circuit and is provided with a second input end for receiving the switch control signal and a second output end, the second output end is used for transmitting a second control signal generated by the drive circuit to the control circuit, and in the short-circuit state, the control circuit adjusts the state of the control circuit according to the first control signal so as to control the switch. The second control signal is changed to reduce the short-circuit current of the output circuit. Therefore, the reliability and the safety of the circuit with the load switch can be improved.
Owner:SG MICRO
Optical module with blaze protection function
ActiveCN102299744BEffective protectionRealize hot-swapping functionElectromagnetic receiversArrangements responsive to excess voltageCurrent limitingOptical Module
The invention discloses an optical module with a blaze protection function. The optical module comprises a light reception assembly used for receiving a light signal, a boost circuit, a current mirror device and an MCU. The boost circuit sends high voltage generated by the boost circuit to a response current output terminal of the light reception assembly through the current mirror device and a current-limiting resistor. The current mirror device receives response current outputted by the light reception assembly, and sends the response current to the MCU after zoom processing. The MCU connects with boost voltage, and adjusts high voltage amplitude outputted by the boost circuit. According to the invention, a high voltage protection circuit is designed at a receiving end of the optical module, so that when a blaze reaches, the light reception assembly is prevented from breakdown and damage, and the optical module is effectively protected. At the same time, through employing a high integrated level transmit-receive one body chip to construct a module circuit, a circuit board dimension is reduced, a SFP interface packaging form is adapted, support of a digital diagnosis function is completed, and maintenance cost of a whole is reduced.
Owner:HISENSE BROADBAND MULTIMEDIA TECH
Heat dissipation system for high-voltage frequency converter of desulfurization and denitrification induced draft fan
PendingCN113991972AAvoid breakdown damageAvoid burnsModifications for power electronicsCleaning using toolsFrequency changerThermodynamics
The invention provides a heat dissipation system for a high-voltage frequency converter of adesulfurization and denitrification induced draft fan, and relates to the technical field of environment-friendly desulfurization and denitrification production. The system comprises a frequency converter assembly and a heat dissipation assembly, the frequency converter assembly is arranged in a control room, the frequency converter assembly comprises a transformer cabinet, a power unit cabinet and a switching cabinet, the transformer cabinet and the power unit cabinet are each provided with a cabinet top fan, the heat dissipation assembly comprises 10P air conditioners and 5P air conditioners, and the 10P air conditioners are located on the two sides of the rear end of the interior of the control room. The two 10P air conditioners and the three 5P air conditioners are arranged to perform internal circulation heat dissipation, air is not extracted from the outside, insulation breakdown damage of internal electrical components caused by accumulation of a large amount of conductive dust in the frequency converter assembly can be avoided, the service life of the electrical components is prolonged, the fault rate of the frequency converter assembly is reduced, no hot air duct or negative pressure exists, overload operation and over-temperature burning loss of a cabinet top fan of the frequency converter assembly can be avoided, and the service life is prolonged.
Owner:YANGCHUN NEW STEEL CO LTD
Manufacturing method of semiconductor device
ActiveCN107492485BGuaranteed performanceAvoid breakdown damageSemiconductor/solid-state device manufacturingSemiconductor devicesDevice materialEngineering
The invention provides a manufacturing method of a semiconductor device. The method comprises the following steps of forming a grid oxide layer on a semiconductor base; forming a grid material layer on the grid oxide layer; and using a dry method etching technology to etch the grid material layer so as to form a grid electrode and carrying out deion processing on the grid material layer during a grid electrode formation process. In the invention, during a process of using the dry method etching technology to etch the grid material layer so as to form the grid electrode, deion processing is performed on the grid material layer so that conditions that excess ions are accumulated in the grid material layer and the grid oxide layer generates breakdown damages are avoided, and then integral performance of the semiconductor device can be guaranteed.
Owner:FOUNDER MICROELECTRONICS INT
Roller scrapper
InactiveCN106542266AHigh strengthEliminate vertical gapsConveyorsControl devices for conveyorsPower flowSlag
The invention provides a roller scrapper which comprises an abrasion-resistant plate structure. The abrasion-resistant plate structure is mainly formed by splicing three abrasion-resistant plates distributed end to end sequentially. By adoption of the abrasion-resistant plate structure, longitudinal gaps are eliminated, gap slag inclusion and deformation are avoided, and the strength of the abrasion-resistant plate structure is enhanced. The roller scrapper further comprises a current monitoring device. The current monitoring device comprises a current transformer, an intelligent protector module and an operating console which are electrically connected. The current transformer is connected into a roller scraper operating loop in series. The current transformer can sense a current value in the roller scrapper operating loop and transmits the current value to the intelligent protector module. The intelligent protector module compares the received current value with a current alarm value, the current monitoring device enables the roller scrapper operating loop to be disconnected when the received current value exceeds the current alarm value, and the roller scrapper stops in time; and faults can be eliminated conveniently in time, the fault treatment time is shortened, and the fault treatment cost is reduced.
Owner:MCC BAOSTEEL TECH SERVICE
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