Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
47results about How to "No arc" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Device and method for repairing friction stir welding weld defect of storage tank for carrier rocket
ActiveCN102581476AGuarantee product qualityReduce scrapNon-electric welding apparatusFilling materialsRocket
The invention provides a device and a method for repairing a friction stir welding weld defect of a storage tank for a carrier rocket. A repair welding pin tool comprises a tool pin clamping structure and a tool pin, the end face of a shaft shoulder portion of the tool pin clamping structure is a recessed slope provided with two concentric-circle annular grooves, the front of the tool pin is of a conical thread structure, and a conical thread is circumferentially provided with three spiral grooves at intervals. The method includes the steps: firstly, manually excavating the tool pin broke at a friction stir welding weld; secondly, performing solid filling for the weld; thirdly, utilizing the repair welding pin tool to start friction stir welding from a center of the broke position of the tool pin filled with welding wires or materials to a set welding end point; and finally, continuing utilizing the repair welding pin tool to perform friction stir welding for the weld again from a welding start point to the welding end point. The method and the device are capable of guaranteeing the quality of the storage tank for the carrier rocket and decreasing scrapping of the storage tank for the carrier rocket due to the key hole type defect.
Owner:CAPITAL AEROSPACE MACHINERY +1
Commutation circuit based on priorities and multi-path power supply commutation system containing same
InactiveCN101771292ASolve the priority switching problemHigh precisionEmergency power supply arrangementsControl signalControl line
The invention discloses a commutation circuit based on priorities, which comprises a plurality of switch units, wherein each switch unit has a preset priority different from that of other switch units. Each switch unit comprises a switch tube connected between one of a plurality of power supplies and a power bus in series, connected with an external control device and used for receiving a controlsignal from the external control device so as to control the switching-on and the switching-off of the switch tubes, wherein the power supplies and the switch units are in one-to-one correspondence. Priority control lines are led out between the switch tubes of the switch units with relatively higher priorities in the switch units and the power bus and connected to the position of the switch tubeof each switch unit with relatively lower priority.
Owner:BEIJING AEONMED
Friction stir welding method for lock bottom circular seam of carrier rocket storage tank
ActiveCN104439686AImproved consistency and stability of mechanical propertiesImprove performanceDomestic vesselsMetal working apparatusLap jointFusion welding
The invention belongs to welding methods, and particularly relates to a friction stir welding method for a lock bottom circular seam of a carrier rocket storage tank. The method comprises the following steps that firstly, welded parts are transformed, welding leakage grooves are formed in a tank bottom fork-shaped ring, and the welding leakage grooves are formed in the bottommost portion of a tank bottom fork-shaped circular welding seam; secondly, the welded parts are in lap joint, and the welded tank bottom fork-shaped ring is in lap joint with a short shell to form the welding joint; thirdly, welding is carried out, and welding is carried out along the welding joint through the friction stir welding manner. The method has the obvious advantages that nearly defect-free welding can be achieved, the consistency and stability of the mechanical property of the joint are obviously improved, and compared with a fusion welding lock bottom joint, the performance of the lock bottom circular seam is improved by about 20 percent to 30 percent.
Owner:CAPITAL AEROSPACE MACHINERY +1
Intelligent and commutation type three-phase current imbalance automatic adjusting device
PendingCN109347126AAvoid phase-to-phase short circuitsExtended service lifePolyphase network asymmetry elimination/reductionPolyphase network asymmetry reductionZero crossingElectricity
The invention relates to an intelligent and commutation type three-phase current imbalance automatic adjusting device. The device comprises a main controller, a phase converter, a first current transformer and an anti-power-off electrical appliance element combination; the main controller is a control terminal and is electrically connected with an outgoing line side bus of a distribution transformer; and the phase converter is an execution terminal and is electrically connected with a user line and a user load of a three-phase branch through the anti-power-off electric appliance element combination. Relay current zero-crossing cutting and voltage zero-crossing input technologies are adopted, so that it is guaranteed that no arc exists at the moment of cutting and no inrush current exists at the moment of input, the service life of a relay is prolonged, and the operation reliability of the relay is improved; and a magnetic latching relay with a switching state feedback signal output endis adopted, so that the problem of interphase short circuit caused by improper execution of a switching action of the magnetic latching relay is avoided.
Owner:SHANDONG ELECTRICAL ENG & EQUIP GRP XINNENG TECH CO LTD
Method for constructing upper conduit frame of six-pile conduit frame
ActiveCN107401175AHigh precisionEasy to assembleArc welding apparatusFoundation engineeringEngineeringStructural engineering
The invention relates to a method for constructing an upper conduit frame of a six-pile conduit frame. The construction method comprises the steps of first segmenting the upper conduit frame: dividing the conduit frame into seven segments in total, wherein a main barrel is independently a segment and is marked as D01, with a weight of 157 tons; inclined strut steel pipes, horizontal supporting steel pipes and pile sleeves form six L-shaped segments, correspond to steel pipe pile, and are sequentially marked as G01, G02, G03, G04, G05 and G06, and the single segment weighs 59 tons. The construction method comprises the steps that steel plates are inspected after arriving; and according to a jacking diagram, the steel plates are subjected to blanking, lineration and groove cutting, steel plate machining edge rolling, cylinder splicing, assembly welding, jig frame manufacture, segmenting pre-folding, segmented handing over for examination and segmented coating. The method has the advantages that horizontal type pre-assembly is performed; by segmented manufacture of the main barrel and a supporting pipe, the inclined strut steel pipes are divided into two segments to be pre-assembled, finally the size of each segment is determined, and the precision is high; vertical type folding is performed, and the method facilitates final assembly.
Owner:NANTONG BLUE ISLAND OFFSHORE CO LTD
Infrared spontaneously heating floor and process thereof
InactiveCN102808495AHeating up fastEven heat dissipationLighting and heating apparatusElectric heating systemFiberCarbon fibers
The invention belongs to the field of floor processing, and particularly relates to infrared spontaneously heating floor which generates heat through carbon fiber cables implanted into a substrate with filament carbon fibers as warm cores, and a process thereof. The floor comprises a wear resistant layer, a decorative layer, a base material and a balance layer which are arranged layer by layer from top to bottom; the decorating layer and the base material receive flame-retardant treatment; the bottom surface of the base material is provided with a wire duct with a downward notch; a position on the balance layer which corresponds to the wire duct is hollow; power cords and the carbon fiber cables which are mutually connected are distributed in the wire duct; the carbon fibers in the carbon fiber cables are filament carbon fibers; the input ends and the output ends of the power cords are respectively provided with universal serial bus (USB) socket connectors; and an infrared reflection film, a heat isolation layer and a heat insulation layer are arranged from top to bottom below the balance layer. The carbon fibers are arranged in the substrate, have stable structures, are safe, have long service life and do not need to be repaired, the filament carbon fibers are arranged in the substrate, and are more corrosion resistant, are not attenuated and are not easy to oxidize; and during a use process, the heating is uniform, no wires are lost, and the service life is long.
Owner:浙江鼎栎家居有限公司
Tapping switch for load voltage-regulating transformer and voltage-regulating transformer using the same
InactiveCN101325124AContinuous regulationReduce in quantityVariable inductancesElectronic switchingElectronic switchVoltage regulation
The invention discloses a tapping switch of an on-load regulating transformer. The tapping switch comprises a single tapping switch controller connected with a voltage regulation controller, a first two-way switch with one end being connected with the single tapping switch controller and the other end being connected with the voltage regulation controller through a first filter, a second two-way switch with one end being connected with the single tapping switch controller and the other end being connected with the voltage regulation controller through the first filter and the first filter connected among the first two way switch, the second two-way switch and the voltage regulation controller, wherein, the first two-way switch and the second two-way switch are mutually connected, so as to be used for controlling the change of the number of windings of the primary side or the secondary side of the voltage regulation controller along with the change of the switching condition of the first two-way switch and the second two-way switch. The tapping switch can realize the continuous and quick voltage regulation without harmonic waves, electric arcs and actuating mechanisms, and the tapping switch has few electronic switches, thereby having the advantages of simple structure, easy control and low cost.
Owner:CHINA AGRI UNIV
Miniature circuit breaker control device and method applying device to control circuit breaker
ActiveCN105355518ADoes not affect manual controlImprove securityProtective switch operating/release mechanismsControl circuitCircuit breaker
The invention provides a miniature circuit breaker control device. Through movement of a sliding block on a screw rod, a switch-off driving mechanism and a switch-on driving mechanism are respectively driven to complete switch-off and switch-on operations on a circuit breaker; after the switch-off and switch-on operations are completed, the sliding block returns to an original position, and a transmission relation with the switch-off driving mechanism or the switch-on driving mechanism is disconnected; since the transmission relation is disconnected, an internal part of the miniature circuit breaker control device cannot stop the action of a switch-off and switch-on mechanism of the miniature circuit breaker any longer, thus, a handle of the miniature circuit breaker still can be manually operated to achieve switch-off and switch-on after the switch-off and switch-on operations of the miniature circuit breaker are controlled. With the miniature circuit breaker control device provided by the invention, the manual switch-off and switch-on still can be fulfilled on the condition of a fault occurs in the miniature circuit breaker control device without affecting original manual control of the miniature circuit breaker, and the safety performance is improved. Moreover, the invention also provides a method applying the above miniature circuit breaker control device to control the miniature circuit breaker.
Owner:JAECELE ELECTRIC
Adjustable current-limiting protection circuit on direct current loop
InactiveCN102412550AContinuously adjustable magnification factorAdjustable magnification factorArrangements responsive to excess currentAutomatic controlSignal processing circuits
The invention provides an adjustable current-limiting protection circuit on a direct current loop. The current-limiting protection circuit comprises a signal processing circuit and a comparison control circuit which are connected with a driving switch circuit; circuit signals are collected at the inlet and outlet of the driving switch circuit, processed by the signal processing circuit and then output to the comparison control circuit; and after comparing a standard signal, the comparison control circuit outputs a control signal to the driving switch circuit so as to control the turned-off of the driving switch circuit. According to the invention, current flowing over a main circuit is indirectly monitored through the real-time sampling of the conduction voltage drops of the two ends of IGBT (insulated gate bipolar transistor); with IGBT as core, real-time comparison is carried out through directly detecting overcurrent in the circuit so that a breaking circuit is protected, breaking action is rapid without contact electric arc; the adjustable current-limiting protection circuit of the invention has the advantages of automatic restoration, automatic control and high working efficiency, can adjust a circuit amplification coefficient so as to continuously achieve the adjustment of a current-limiting value.
Owner:CHUANTIE ELECTRIC TIANJIN GRP
Electric automobile charge system
ActiveCN104967154ALow costSmall footprintBatteries circuit arrangementsElectric powerElectric energyAnode
The invention discloses an electric automobile charge system. The system is provided with multiple charge output interfaces, and comprises a charge unit and at least one switching unit connected with the output port of the charge unit, wherein each switching unit comprises one or more switch units, each switch unit comprises a first semiconductor switch or a second semiconductor switch and a third semiconductor switch which are successively connected, and each switch unit is used for switching on and switching off to switch power output between the charge unit and the multipath charge output interfaces according to charge states of electric automobiles connected with the switch unit. The electric automobile charge system provided by the invention has the following steps: the switch units composed of the semiconductor switches are installed at the anode and / or cathode output port of each power supply module, through controlling the conduction or disconnection of the semiconductor switches, the power output between the power supply modules and the multiple charge output interfaces can be flexibly distributed, the system cost is low, and the occupied space is small.
Owner:SHENZHEN SINEXCEL ELECTRIC
Power conversion integrated system for scientific research and teaching
PendingCN108364549AIncrease flexibilityFast switching speedEducational modelsPower gridAlternating current
The invention provides a power conversion integrated system for scientific research and teaching. The power conversion integrated system comprises a power network, a miniature energy router and a switching device, wherein the power network is used for supplying an alternating current to the miniature energy router, the miniature energy router is used for generating different types of electric energy, and the switching device is used for changing flow directions of the electric energy; and at least two modes of providing electric energy are achieved by converting the electric energy of an alternating source to different types of electric energy and / or changing the flow directions of the electric energy. The miniature energy router of the power conversion integrated system is an integrated body of power conversion equipment resources and can generate different types of electric energy, and the switching device distributes the electric energy, thus the power conversion equipment resourcesare subjected to secondary integration indirectly, therefore, at least two modes of providing electric energy can be achieved, electric energy is provided to different loads, an integrated power conversion system is formed, the power conversion equipment resources are saved, and the cost is reduced.
Owner:深圳青铜剑科技股份有限公司
Intelligent zero-crossing switching device for high-voltage shunt capacitors
ActiveCN104600722ASmall currentExtended service lifeReactive power adjustment/elimination/compensationReactive power compensationSilicon-controlled rectifierShunt capacitors
The invention discloses an intelligent zero-crossing switching device for high-voltage shunt capacitors. The intelligent zero-crossing switching device comprises a silicon-controlled rectifier group, single-pole alternating-current vacuum contactors, a controller, a photoelectric conversion system, a depth filter and a trigger board. The silicon-controlled rectifier group comprises first inverse parallel silicon-controlled rectifiers and second inverse parallel silicon-controlled rectifiers, Phases A of the first inverse parallel silicon-controlled rectifiers are serially connected with one another, phases C of the second inverse silicon-controlled rectifiers are serially connected with one another, the single-pole alternating-current vacuum contactors include phase-A single-pole alternating-current vacuum contactors and phase-C single-pole alternating-current vacuum contactors, and the photoelectric conversion system comprises photoelectric converters and transmission optical fibers and has a main function of carrying out photoelectric signal conversion on electric signals between the controller and the trigger board of the silicon-controlled rectifier group; the trigger board is connected with a control pole of each silicon-controlled rectifier and is used for outputting trigger signals required for triggering the silicon-controlled rectifier group, voltages signals of the phases A and phase lines B and voltage signals of the phases C and the phase lines B are transmitted through the depth filter and then are connected with the controller, and the controller is connected with the trigger board by the photoelectric conversion system. The intelligent zero-crossing switching device has the advantages of high voltage zero-crossing detection precision and good switching effect.
Owner:LISHUI POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER
2205 dual-phase steel automatic welding method
InactiveCN109909584ARealize automatic weldingNo splashArc welding apparatusPlasma welding apparatusSlagEngineering
The invention relates to a 2205 dual-phase automatic welding method. The method includes the steps that longitudinal seams and circular seams of a tube body are welded by adopting a PAW / TIG dual-gun switching longitudinal seam automatic welding system and a PAW / TIG dual-gun switching circular seam automatic welding system. When the slag thickness of the 2205 dual-phase stainless steel tube body is4-10 mm, an I-shaped groove type is adopted, a groove is planned to be a straight edge in a straight-edge butt-jointing mode, and automatic PAW is used for self fusion welding without filler wires once and then is switched to automatic argon arc welding for covering with the filler wires once; and when the slab thickness of the 2205 dual-phase stainless steel tube body is 10-15 mm, a Y-shaped joint groove type is adopted, the groove angle is 75 degrees, the unilateral is 37.5 degrees, the truncated edge is 6 mm, and the automatic PAW is used for self fusion welding without the filler wires once, and then is switched to automatic GTAW for covering with the filler wires 2-4 times until full welding. According to the 2205 dual-phase automatic welding method, back gouging is not needed, automatic welding is achieved, the welding production efficiency is high, no spatter, powder, arc light, and noise exist in the welding process, shapes of welding lines are neat and beautiful, and the quality of whole equipment is improved.
Owner:TIANHUA INST OF CHEM MACHINERY & AUTOMATION
Test object cabinet for testing anticipated short-circuit current of SPD (surge protection device)
InactiveCN102435887AProtection securityTimely exclusionElectrical testingMeasurement instrument housingProspective short circuit currentEngineering
The invention relates to a test object cabinet for testing anticipated short-circuit current of an SPD (surge protection device). The test object cabinet has an airtight, visual and closed structure capable of discharging smoke dust and disconnecting power supply after being opened. A movable organic glass observation cover is mounted on a test bench surface to facilitate observation and operation; a centrifugal exhaust fan is connected with an air inlet on the test bench surface and an air outlet on the cabinet wall; and the centrifugal exhaust fan can promptly exhaust smoke dust generated by burning the test object. The test object cabinet with the closed structure can effectively protect the personal safety of test personnel in case of an accident.
Owner:CHENGDU XINGYE LEIAN ELECTRONICS
AC-DC dual-purpose high-power electric water heater
The present invention provides an AC-DC dual-purpose high-power electric water heater. The AC-DC dual-purpose high-power electric water heater is composed of two portions including an electric water heater basic device and a control device. The electric water heater has the structure that a water heater inner container and an inner container seal cover are disposed in a cylindrical heat insulation electric water heater housing, an electric heating pipe, a temperature controller and a snap action temperature limiter are disposed in the inner container, a lower part of the housing is provided with a water inlet, a water outlet and a sewage draining exit, and the front side of the water heater housing is provided with a heating indicating lamp and a temperature display. The control device is installed between the inside of a side cover of the water heater and the inner container seal cover, the snap action temperature limiter, the temperature controller, a DC operation relay and a filtering rectifier are disposed in the control device, on and off of the electric heating pipe are controlled by the DC operation relay, and a power line stretches out of the cylindrical housing and is electrically connected with a power plug. The electric water heater is AC-DC dual-purpose, and on and off of the electric heating pipe are controlled by the DC operation relay without arc discharge. The electric water heater is suitable for office and household use, and especially suitable for DC photovoltaic power generation household use.
Owner:丁樟富
Efficient electricity-saving appliance of intelligent three-phase electric motor
InactiveCN104184384AAvoid damageImprove stabilityAC motor controlCurrent electricTransformation unit
The invention discloses an efficient electricity-saving appliance of an intelligent three-phase electric motor and relates to the technical field of control devices of alternating-current electric motors. The efficient electricity-saving appliance comprises a power adjusting unit, a voltage sampling unit, a zero-detection unit, a sawtooth wave forming unit, a power adjusting signal synthesis unit, a square-wave oscillator, a phase demodulation unit, a first current sampling unit, a changeover switch, a second current sampling unit, a soft starting unit, an overload protection unit, a phase loss protection unit, a startup and shutdown soft parking unit and a starting and opening changeover unit. The efficient electricity-saving appliance can dynamically adjust power input into the electric motor with change of electric motor loading capacity, ensures that the electric motor operates at the optimum load rate, reduces reactive loss of the electric motor, remarkably improves the actual operating efficiency of the electric motor and achieves the electricity-saving purpose.
Owner:STATE GRID CORP OF CHINA +3
Minicomputer intelligent lockset system
InactiveCN1560407AAvoid misuseRealize online modificationNon-mechanical controlsElectric permutation locksElectronic switchAlternating current
The invention is microcomputer intelligent lock system, which mainly made up of keyboard circuit, bit driving circuit, microprocessor, and lock head electromagnetic driving circuit, memory, protecting circuit, power control circuit. The keyboard circuit, bit driving circuit, and the memory are connected to the microprocessor directly; the buzz instructing light circuit, lock head electromagnetic driving circuit, power control circuit, and the protecting circuit are connected to the bit driving circuit; the protecting circuit controls the read and write of the memory; the microprocessor is connected with a PC to change the cipher code; the direct current electric signal uses the thyristor to control the alternate current power of the electric lock; a returning hook device is arranged in the electric lock for ensuring the safety when closing the door. The lock uses electron switch, has no arc or spark; the inputted cipher code may reach to 16 bits, it can change the cipher code online.
Owner:江苏中兴建设有限公司
Converter device for electrified railway ground automatic neutral section system
The invention provides a converter device for an electrified railway ground automatic neutral section system. The topological structure of the device comprises a high voltage pre-charging unit, an MMCrectifying unit, an intermediate direct current isolation conversion unit and an MMC inverter conversion unit. The MMC rectifying unit and the MMC inverter conversion unit comprises left and right bridge arms respectively. Each bridge arm is composed of symmetrical upper and lower half bridges, and the upper and lower half bridges comprise a reactor and n power modules connected in series respectively. The intermediate direct current isolation conversion unit is composed of m direct current isolation conversion modules DCM directly connected in series on the direct current side. The device provided by the invention realizes converting for the power supply of the neutral section of the electrical sectioning of a contact network, so that a train can pass through the electrical sectioning without power off.
Owner:中国船舶重工集团公司第七一二研究所 +2
Series battery pack management and control method based on automatic battery switching control system
PendingCN111525633AReliable operationHigh degree of automationParallel/serial switchingElectric powerEmbedded systemCharge and discharge
The invention discloses a series battery pack management and control method based on an automatic battery switching control system. The system comprises a switching control unit, a battery access unit, a standby battery access unit, a voltage detection unit, a temperature detection unit, wherein the battery access unit consists of a plurality of basic battery access nodes which are connected in series, the standby battery access unit is composed of a plurality of standby battery access nodes which are connected in series, the voltage detection unit is used for detecting a voltage of a single battery accessed to each battery access node, the temperature detection unit is used for detecting the temperature of a single battery accessed to each battery access node, when one or more batteries in the battery pack are abnormal, faulty batteries can be immediately removed from the battery pack, the standby batteries are connected into the battery pack, and the switching process can be carriedout online in the discharging or charging process of the battery pack without stopping charging and discharging. The control system is advantaged in that the control system provided by the invention can be widely applied to the battery pack, effectively guarantees use safety of the battery, enhances redundancy capability, and prevents the condition that the whole battery pack cannot be used due tofailure of a single battery.
Owner:江苏金帆电源科技有限公司
On-load adjustable stepless voltage-stabilizing transformer
InactiveCN101465194AThe output voltage value is stableNo arcTransformers/inductances coils/windings/connectionsContinuously variable inductances/transformersFailure rateChinese characters
The invention discloses a load-bearing adjustable stepless voltage regulating transformer, which belongs to the electrical engineering technical field and is characterized in that the iron core of the transformer comprises a main iron core shaped as the Chinese character <ri> and a cylindrical rotating iron core; the main iron core comprises three iron core columns A, B, C; a cylindrical hollow cavity is arranged inside the iron core column B, and the rotating iron core can be placed and rotated in the hollow cavity; a rotating shaft bracket is made of non-ferromagnetic material, and the rotating shaft of the rotating iron core is arranged at the center of the rotating shaft bracket; the rotating shaft is connected with a transmission mechanism and then driven by a motor; the rotation of the motor is controlled by the output voltage; a primary side winding and a secondary side winding are wound on the iron core column A; another secondary side winding is wound on the iron core column B or C; and the two secondary side windings are positively connected in series to serve as the output end of the transformer. When the rotating iron core rotates, the rotating iron core can load and continuously change the output voltage and can freely set a plurality of stable output voltage value; the transformer causes no electric arc and harmonic when in work and has no thyristor and other electronic elements, so the transformer achieves good reliability and low failure rate; besides, the transformer has simple structure, low manufacturing cost and low maintenance cost.
Owner:许明德
Minicomputer intelligent lockset system
InactiveCN100395424CAvoid misuseRealize online modificationNon-mechanical controlsElectric permutation locksElectronic switchAlternating current
The invention is microcomputer intelligent lock system, which mainly made up of keyboard circuit, bit driving circuit, microprocessor, and lock head electromagnetic driving circuit, memory, protecting circuit, power control circuit. The keyboard circuit, bit driving circuit, and the memory are connected to the microprocessor directly; the buzz instructing light circuit, lock head electromagnetic driving circuit, power control circuit, and the protecting circuit are connected to the bit driving circuit; the protecting circuit controls the read and write of the memory; the microprocessor is connected with a PC to change the cipher code; the direct current electric signal uses the thyristor to control the alternate current power of the electric lock; a returning hook device is arranged in the electric lock for ensuring the safety when closing the door. The lock uses electron switch, has no arc or spark; the inputted cipher code may reach to 16 bits, it can change the cipher code online.
Owner:江苏中兴建设有限公司
Electric appliance main contactor management circuit and method
InactiveCN106992773ARealize on-off controlNoiseless opening and closingElectronic switchingCapacitancePush pull
The invention provides an electric appliance main contactor management circuit and method, and is applied to the technical field of vehicle control. The circuit comprises a current pump oscillation unit, a main contactor pre-charge unit, an isolation unit and a logic control unit, wherein the current pump oscillation unit is used for performing current amplification through a push-pull circuit to continuously charge a first capacitor and enabling a voltage value of a second capacitor at an output end of a first capacitor to be not less than a preset value; the main contactor pre-charge unit is used for taking a transistor as a main contactor when charging the second capacitor after being powered on and implementing charge control on the second capacitor by switching on the main contactor; the isolation unit is used for isolating the logic control unit from high voltage of the main contactor in order to protect a low-voltage circuit; and the logic control unit is used for performing logic control on the isolation unit through a main chip. According to the electric appliance main contactor management circuit and method, the transistor is taken as the main contactor, management of the transistor as the main contactor is implemented by isolation power supply control logic, and high-power power supply circuit off-on control is implemented.
Owner:友信宏科新能源(徐州)有限公司
Tapping switch for load voltage-regulating transformer and voltage-regulating transformer using the same
InactiveCN101325124BContinuous regulationReduce in quantityVariable inductancesElectronic switchingVoltage regulationElectronic switch
Owner:CHINA AGRI UNIV
Method and device for strong solid phase repair welding such as friction stir welding defects of storage tank
ActiveCN104400211BSolve Repair Welding ProblemsRepair welding process is stableDomestic vesselsMetal working apparatusMilling cutterWelding defect
The invention provides a method and a device for equivalent solid-phase repairing welding of a tank friction stir welding defect. A welded tank drum section is mounted between a machine head box and a machine tail box; the tank drum section passes through an embracing ring and a welding defect of the tank drum section is located on the embracing ring; a repairing welding host machine is fixed right above the embracing ring; a milling cutter is mounted on the repairing welding host machine; a through hole is arranged in a welding position with the defect on the tank drum section; an inner supporting rod set is arranged on a welding defect position in the tank drum section; a positioning pin is mounted on the repairing welding host machine, and then a welding base plate is in close contact with an inner wall of the tank drum section; the positioning pin is detached; a friction stopper rod is mounted on the repairing welding host machine; the friction stopper rod and the through hole in the tank drum section generate sufficient friction heat and plastic deformation. According to the method and the device, the repairing welding process is stable and reliable; the whole property of a repairing welding joint is equivalent to the property of a friction stir welding joint; a repairing welding device is used for effectively solving a repairing welding problem after the welding defect of a total assembling circular seam under a tank-forming state is detected.
Owner:CAPITAL AEROSPACE MACHINERY +1
Photovoltaic DC 60v electric three-wheel disaster relief RV multi-purpose stove for cooking, cooking and heating
ActiveCN106051847BNo arcDomestic stoves or rangesLighting and heating apparatusMotor homeEngineering
Owner:平邑经发科技服务有限公司
Tubular energy-saving closed low-voltage branch bus duct system
InactiveCN103840411AIncrease the cross-sectional areaImprove conductivityCooling bus-bar installationsTotally enclosed bus-bar installationsElectrical conductorEngineering
The invention discloses a tubular energy-saving closed low-voltage branch bus duct system which comprises a bus body and a jack box. The jack box is connected to the bus body in an inserted mode. The bus body comprises a shell, wherein multiple current-carrying conductors are arranged in the shell in a mutually parallel and horizontal mode. Insulating resin partition blocks are arranged between the current-carrying conductors in a filling mode. Branch plug ports are formed in the shell. Each current-carrying conductor is of a round tube shape. A corresponding connecting conductor is arranged outside each current-carrying conductor, wherein the connecting conductor is perpendicular to the periphery of the current-carrying conductor, and the connecting conductor is located in the corresponding plug port. The bottom of the jack box is provided with multiple pins, and the pins are inserted into the connecting conductors at the time of connection. The closed bus body is simple in structure, good in heat dissipation performance, and large in conducting section current; a connector at the beginning end of the bus body can rotate by 360 degrees; site construction is convenient, the current section is enlarged, and therefore consumption of mineral energy is reduced.
Owner:镇江昊源电气有限公司
Dynamic voltage compensation device for AC/DC hybrid power distribution network and control method thereof
ActiveCN112803425AEnsure electricity safetySensitive loads do not affectAc network voltage adjustmentSingle ac network with different frequenciesElectrical connectionComputational physics
The invention relates to a dynamic voltage compensation device for an AC / DC hybrid power distribution network and a control method thereof. The device comprises an A-phase rectification transformation module, a B-phase rectification transformation module and a C-phase rectification transformation module which are electrically connected with one another; each of the A-phase rectification transformation module, the B-phase rectification transformation module and the C-phase rectification transformation module comprises: a high-voltage input side electrical wiring terminal, an electric reactor, a plurality of power units of which the input sides are connected in series and a plurality of isolation transformers of which the primary sides are electrically connected with the output sides of the power units respectively; the power units at the tail ends of the A-phase rectification transformation module, the B-phase rectification transformation module and the C-phase rectification transformation module are electrically connected with one another, and the isolation transformers at the tail ends are electrically connected with one another; the input side outgoing line terminals of the power units at the tail ends are short-circuited together to form a high-voltage neutral point N; and the direct current bus leading-out terminal of one power unit at the tail end is used as a low-voltage direct current output side negative wiring terminal and a low-voltage direct current output side positive wiring terminal.
Owner:普世通(北京)电气有限公司
A high-voltage shunt capacitor intelligent zero-crossing switching device
ActiveCN104600722BSmall currentExtended service lifeReactive power adjustment/elimination/compensationReactive power compensationSilicon-controlled rectifierShunt capacitors
The invention discloses an intelligent zero-crossing switching device for high-voltage shunt capacitors. The intelligent zero-crossing switching device comprises a silicon-controlled rectifier group, single-pole alternating-current vacuum contactors, a controller, a photoelectric conversion system, a depth filter and a trigger board. The silicon-controlled rectifier group comprises first inverse parallel silicon-controlled rectifiers and second inverse parallel silicon-controlled rectifiers, Phases A of the first inverse parallel silicon-controlled rectifiers are serially connected with one another, phases C of the second inverse silicon-controlled rectifiers are serially connected with one another, the single-pole alternating-current vacuum contactors include phase-A single-pole alternating-current vacuum contactors and phase-C single-pole alternating-current vacuum contactors, and the photoelectric conversion system comprises photoelectric converters and transmission optical fibers and has a main function of carrying out photoelectric signal conversion on electric signals between the controller and the trigger board of the silicon-controlled rectifier group; the trigger board is connected with a control pole of each silicon-controlled rectifier and is used for outputting trigger signals required for triggering the silicon-controlled rectifier group, voltages signals of the phases A and phase lines B and voltage signals of the phases C and the phase lines B are transmitted through the depth filter and then are connected with the controller, and the controller is connected with the trigger board by the photoelectric conversion system. The intelligent zero-crossing switching device has the advantages of high voltage zero-crossing detection precision and good switching effect.
Owner:LISHUI POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER
A construction process for the lower part of an offshore booster station
ActiveCN107470860BNot easy to tiltGuaranteed long-term operation and maintenanceWind motor supports/mountsProduction rateEngineering
A construction process of a lower assembly of an offshore voltage booster substation, the process comprising the following steps: (1) performing, according to a nesting drawing, a blanking operation on a steel sheet; (2) marking lines, and cutting grooves; (3) fabricating steel tube piles (1), transverse support rods, and diagonal support rods (5); and (4) joining and welding the steel tube piles (1), transverse support rods, and diagonal support rods (5). By horizontally constructing each section and then joining and welding the same vertically, the construction process is performed in an orderly manner to improve the construction efficiency and enable the lower assembly to provide stable support, thus facilitating long-term operation maintenances of an offshore voltage booster substation. The steel tube pile (1) comprises a vertical portion and an inclined portion inclined toward an inner side, thus greatly improving support provided by the lower assembly, and lowering the possibility of tilting. The present invention has high requirements for rolling and cutting operations, and employs submerged arc welding to provide stable welding quality and high welding production efficiency with no arc light and little fumes and dust. In addition, a reasonable welding allowance is employed to ensure welding quality and precision, thus significantly improving support provided by the lower assembly, and providing stability to the whole offshore voltage booster substation.
Owner:NANTONG BLUE ISLAND OFFSHORE CO LTD
High Voltage Switching Branch for Submarine Observation Network with Fast Relay Protection
ActiveCN108711844BNo need to drop voltageFault isolation implemented onlineEmergency protective circuit arrangementsAc network circuit arrangementsAll solid stateTelecommunications
The invention relates to a high-voltage switching branch device of a submarine observation network with fast relay protection, which includes a monitoring and control unit, a high-voltage switching unit, a power supply unit and a starting unit. The invention realizes the high-voltage switching function through the all-solid-state switch, and can monitor the voltage of the submarine trunk cable of the branch in real time. When a grounding fault occurs in the submarine cable, the fault isolation method of the submarine cable implemented inside the micro-controller in the monitoring and control unit automatically Identify the fault mode and control the switch to cut off the high-voltage power switch, and quickly isolate the faulty submarine cable section online. The invention has the characteristics of fast fault automatic identification and isolation speed, and can provide guarantee for the long-term operation of the seabed observation network.
Owner:TONGJI UNIV
Features
- R&D
- Intellectual Property
- Life Sciences
- Materials
- Tech Scout
Why Patsnap Eureka
- Unparalleled Data Quality
- Higher Quality Content
- 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com