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41results about How to "Rectification" patented technology
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Energy feedback type magnetorheological fluid energy absorber
ActiveCN106369101ASolve the problem that additional power supply needs to be configuredSolve the problem of additional configuration power supplySpringsNon-rotating vibration suppressionElectricityBall screw
The invention discloses an energy feedback type magnetorheological fluid energy absorber. The energy feedback type magnetorheological fluid energy absorber is characterized in that the energy feedback type magnetorheological fluid energy absorber is composed of a controllable damping force mechanism, an energy feedback mechanism and a self-adaption power supply circuit; the controllable damping force mechanism is formed by coaxially assembling an excitation shell and a movement conversion mechanism, wherein the movement conversion mechanism comprises a conversion mechanism sleeve, a ball screw, an excitation rotor and a thrust bearing; the excitation shell is connected with an upper end cover and an energy feedback mechanism shell to form a closed space full filled with magnetorheological fluid; according to the energy feedback mechanism, in the energy feedback mechanism shell, an engine is formed by coaxially assembling an engine upper sleeve and an engine lower sleeve, and an engine is driven through a rotating connection sleeve so that energy feedback can be achieved; and electric connection of the self-adaption power supply circuit is achieved between the energy feedback output end of the energy feedback mechanism and the power supply input end of the controllable damping force mechanism. By means of the energy feedback type magnetorheological fluid energy absorber, efficient utilization of the magnetorheological fluid is achieved, and the self-adaption power supply function of the magnetorheological fluid energy absorber is achieved.
Owner:合肥庐阳科技创新集团有限公司
Exhibit microenvironment monitoring system
ActiveCN109932973ARectificationGuaranteed potential sizeProgramme controlComputer controlElectrical resistance and conductanceCapacitance
The present invention discloses an exhibit microenvironment monitoring system. The system comprises a frequency collection circuit, a separation calibration circuit and a frequency selection output circuit. The frequency collection circuit is configured to collect simulation signals of an input end of a signal transmission channel in a control terminal of the exhibit microenvironment monitoring system, the separation calibration circuit utilizes a variable resistor RW1, a variable resistor RW2, a capacitor C3 and a capacitor C4 to divide the output signals of the frequency collection circuit into two paths of signals, the frequency selection output circuit utilizes resistors R19-R21 and capacitors C13-C15 to form a frequency selection circuit to screen out signals with a single frequency for output so as to achieve real-time detection of the signal condition of the signal transmission channel in the control terminal in the exhibit microenvironment monitoring system and convert the signal frequencies to the compensation signals of the simulation signals of the input end of the signal transmission channel in the exhibit microenvironment monitoring system.
Owner:王琪
Rectifier circuit
The invention relates to a rectifier circuit, comprising two inductors L1 and L2, a first switch element Q1, a second switch element Q2, a third switch element Q3, three diodes D3, D4 and D5, and two capacitors DC1 and C2, wherein one end of the inductor L1 is connected with a fire wire and the other end thereof is connected with the cathode of the diode D3, one end of the capacitor DC1 and one end of the third switch element Q3 simultaneously by the first switch element Q2; the other end of the inductor L1 is connected with the anode of the diode D4, the other end of the capacitor DC1 and the anode of the diode D5 simultaneously by the second switch element; the anode of the diode D3 and the cathode of the diode D4 are connected with the zero line simultaneously; the cathode of the diode D5 is connected with the other end of the third switch element Q3; furthermore, the inductor L2 is connected in series with the capacitor C2 and is then connected in parallel to the diode D5. The rectifier circuit can greatly reduce the harmonic current and improve the circuit power factor; furthermore, compared with the output voltage, the input voltage can be output in a reducing or boosting way.
Owner:SHENZHEN SINEXCEL ELECTRIC
Right-angle high-pressure electromagnetic flow meter
InactiveCN104296812AImprove anti-interference abilitySimple structureVolume/mass flow by electromagnetic flowmetersEngineeringHigh pressure
The invention relates to a right-angle high-pressure electromagnetic flow meter which comprises a flow meter shell, a sealing end cap connected with the flow meter shell, a connection base and an electromagnetic flow converter. A metering cavity is arranged in the flow meter shell, and the connection base is respectively connected with the sealing end cap and the electromagnetic flow converter. The flow meter is characterized in that an electromagnetic flow sensor is further included and is located in the metering cavity, the electromagnetic flow sensor comprises a sensor shell, a measurement electrode, an excitation coil and a magnetic yoke, the measurement electrode is embedded into the outer wall of the sensor shell, the excitation coil and the magnetic yoke are located on the inner wall of the sensor shell, and the excitation coil and the magnetic yoke are connected with the electromagnetic flow converter through cables. The right-angle high-pressure electromagnetic flow meter has the advantages that the Faraday electromagnetic induction principle is adopted, the induction signal amplitude and the fluid flow speed are in direct proportion, the structure is simple, movable components do not exist, the service life is long, maintenance load is little, linear flow measurement is achieved, non-linear revision is not needed, measurement precision is high and the flow range is wide.
Owner:ZHEJIANG AOXIN INSTR
An isolated charging and discharging system with bidirectional energy flow
PendingCN109104094AExpand energy gapRectificationEfficient power electronics conversionAc-dc conversionSmart gridElectrical resonance
The invention discloses an isolated charging and discharging system with bidirectional energy flow. The system includes a smart grid, an insolated charging and discharging device and an energy storageunit, and the isolated charging and discharging device is used for controlling the smart grid to output electric power to the energy storage unit, or controlling the energy storage unit to output electric energy to the smart grid. The isolated charging and discharging device comprises a PWM rectifier circuit, a first DC circuit and a DAB circuit connected in turn. The DAB circuit comprises a first inverter circuit, a resonant circuit, an isolated transformer, a second inverter circuit and a second DC circuit. The isolated charging and discharging system of the invention can be applied to electric vehicle charging and smart grid energy storage, has few components and wide output voltage range, can realize the isolated bidirectional energy flow of the power supply, and can effectively maximize the utilization rate of electric energy.
Owner:珠海泰通电气技术有限公司
Mechanical rectification type friction nanometer power generation device
ActiveCN112054711ARectificationSolve the problem of power dissipationInfluence generatorsFriction generatorsBrushEnergy conversion efficiency
The invention discloses a mechanical rectification type friction nanometer power generation device which comprises a friction power generation assembly and a mechanical rectification assembly. The friction power generation assembly comprises a friction electrode assembly and a friction material which can rotate relatively; the mechanical rectification assembly comprises a commutation electrode assembly and an electric brush assembly which can rotate relatively, and the electric brush assembly abuts against the commutation electrode assembly. The reversing electrode assembly and the friction electrode assembly are annularly arranged, the reversing electrode assembly and the friction electrode assembly are relatively fixed, the commutation electrode assembly is electrically connected with the friction electrode assembly, and when the friction electrode assembly and the friction material rotate relatively, the commutation electrode assembly and the electric brush assembly rotate relatively at the same time. The friction electrode assembly and the friction material generate power through friction, and the electric brush assembly can output electric energy outwards. According to the mechanical rectification type friction nanometer power generation device, alternating current to direct current conversion is achieved without an external electrical rectification module, the power dissipation caused by the external electrical rectification module is avoided, and the energy conversion efficiency is high.
Owner:BEIJING INST OF NANOENERGY & NANOSYST
Sealing ring for centrifugal pump
InactiveCN1904381AOvercoming secondary refluxAvoid hydraulic lossPump componentsPumpsCentrifugal pumpEngineering
The invention relates a sealing ring for a centrifugal pump, on whose inner wall is uniformly distributed at least more than two commutator bars. The number of the commutator bars is less than or equal to the number of the impeller vanes. In the open-entry position of fitting the sealing ring with the impeller is opened a sealed groove.
Owner:SHANGHAI KAIQUAN PUMP IND GROUP
Fin-type self-rotating anti-eccentric sucker rod
The invention provides a fin-type self-rotating anti-eccentric sucker rod capable of preventing abrasion to a rod and a pipe and pump clamping and prolonging the maintenance-free period of an oil and gas well. A three body and one rod structure is adopted for the first time, an oval spherical face is adopted for a rectifying body, and well liquid on the rod body can be rectified; a thrust body and the lower end step face of a turbine body form four oil wedges, and the oil wedges make friction with the well liquid to generate dynamic pressure thrust so that a fin type impeller gear can be driven to perform autorotation; converging type oil wedges are formed between the shaft body of a base rod and an oil pipe column, between the oval spherical face of the rectifying body and the oil pipe column, between the thrust body and the oil pipe column, between the conical surface of the turbine body and the oil pipe column and between a conical gear sleeve and the oil pipe column, dynamic pressure liquid films are generated, and it is guaranteed that the rod and the pipe are totally separated; the dynamic pressure liquid films on the inner layer and the outer layer of the conical gear sleeve of the turbine body form two layers of liquid films, separation between the rod and the pipe is facilitated further, and abrasion is avoided; a rod slips and a slips have the self-lubricating function, meanwhile, the liquid films generated between a slips liner and the oil wedges of the base rod can separate the turbine body and the base rod, and thus abrasion is avoided; the thrust body is rotated to stir well liquid, the flowing speed of the well liquid is increased in combination with the supercharging turbine body, and pump burying and pump blocking caused by sedimentation of sand particles can be prevented.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Low speed control device based on double signals
ActiveCN103407462AGuaranteed accuracyImprove accuracy and efficiencyRailway auxillary equipmentRailway profile gaugesComparators circuitsHysteresis comparator
A low-speed control device based on double signals relates to the technical field of axle temperature detection system of railway vehicles and aims at solving the problems that an existing axle temperature detection system of railway vehicles has a single composition, can only determine wheels with a speed of more than 5 kilometers per hour and can not detect wheels with a vehicle speed lower than 5 kilometers per hour. A magnetic steel input signal is connected with a chip CD 4053 through a signal control unit, a first amplifying and filtering circuit, a precision rectifying circuit, a differential amplifying circuit, an amplifying circuit, a threshold comparator circuit, a shaping circuit and a hysteresis comparator circuit; a PRS (Public Regulated Service) input signal is connected with the chip CD 4053 through a second amplify and filtering circuit. The low-speed control device based on the double signals solves the problems of single magnetic steel selection, incapability of detecting vehicles of high speeds and vehicles with a zero-kilometer vehicle speed or with an extreme low speed simultaneously, and axle loss and vehicle loss of the existing axle temperature detection system of the railway vehicles.
Owner:HARBIN VEIC TECH
Resonant wireless power supply system and synchronous rectification circuit thereof
InactiveCN108233450ARectificationBatteries circuit arrangementsEfficient power electronics conversionComputer moduleEngineering
The invention discloses a resonant wireless power supply system and a synchronous rectification circuit thereof. The resonant wireless power supply system comprises a resonant ring, a rechargeable battery, a synchronous sampling inductance coil, a comparator, a reference power supply, a driving module and a controllable switch, wherein a first end of the synchronous sampling inductance coil is grounded, a second end of the synchronous sampling inductance coil is connected with a first input end of the comparator, a second end of the comparator is connected with the reference power supply, an output end of the comparator is connected with an input end of the driving module, an output end of the driving module is connected with a control end of the controllable switch, a first end of the controllable switch is connected with a first end of the resonant ring, and a second end of the controllable switch is grounded; a second end of the resonant ring is connected with a positive electrode of the rechargeable battery, and a negative electrode of the rechargeable battery is grounded; the controllable switch is turned on when voltage of the first input end is greater than voltage of the second input end of the comparator; and the synchronous sampling inductance coil and a receiving inductance coil are overlapped in structure and identical in winding direction. The rectification for sine waves is achieved according to the invention.
Owner:ZONECHARGE (SHENZHEN) WIRELESS POWER TECH CO LTD
Four-quadrant explosion-proof frequency converter with reactive compensation function and control method
PendingCN111817577ARectificationGovernance of power quality problemsElectronic commutation motor controlAC motor controlFrequency changerPower compensation
The invention discloses a four-quadrant explosion-proof frequency converter with a reactive compensation function. The frequency converter comprises an AC filtering unit, a controllable rectificationpower supply, a DC filtering unit, an inversion unit, a rectification controller and an inversion controller. The input end of the inversion unit is connected to the output end of the controllable rectification unit; the output end of the inversion unit is connected to a motor load, the rectification controller controls IGBTs in the controllable rectification unit to achieve rectification and reactive compensation, and the inversion controller controls the IGBTs in the inversion unit to achieve variable frequency speed regulation of the motor load. According to the frequency converter and thecontrol method, four-quadrant operation of rectification, inversion, inductive reactive power and capacitive reactive power in the true sense is achieved, the working conditions of load electric operation and feedback operation can be met, reactive power compensation can be considered, the problem of electric energy quality caused by reactive power can be solved while a motor load is dragged to operate normally, and the utilization rate of equipment is greatly increased.
Owner:XINFENGGUANG ELECTRONICS TECH CO LTD
Multifrequency microwave rectifier circuit
InactiveCN104300806AImprove rectification efficiencySolve the mutual influence problem of impedance matchingAc-dc conversion without reversalUltra-widebandDc current
The invention discloses a multifrequency microwave rectifier circuit. The multifrequency microwave rectifier circuit comprises an input matching network and a rectifier diode. The input matching network comprises a power divider, an impedance transformer bank composed of a plurality of impedance transformers and a filter bank composed of a plurality of filters. The power divider comprises an input end for input of microwaves and at least two output ends, wherein each output end of the power divider is connected with the input end of the corresponding impedance transformer, the output end of each impedance transformer is connected with the input end of the corresponding filter, the output ends of all the filters form a common end for output of direct current, the negative electrode of the rectifier diode is connected with the common end, and the positive electrode of the rectifier diode is grounded. The multifrequency microwave rectifier circuit has the advantages that multifrequency rectification can be achieved, and ultra-wideband rectification can also be achieved; impedance of multiple specific frequency bands of the diode can be transformed; harmonic suppression can be achieved, and the rectification efficiency of the diode can be improved.
Owner:ZHEJIANG TEXTILE & FASHION COLLEGE
Multifunctional storage battery box supporting alternating current output
PendingCN113054313ASupport power needsReduce churnAc-dc conversionDc-dc conversionFull bridgeControl theory
The invention discloses a multifunctional storage battery box supporting alternating current output, and relates to the technical field of storage battery boxes, the multifunctional storage battery box comprises a box body, a partition plate is arranged at an opening of the upper end of the box body, and a DC-to-AC device is arranged on the upper end face of the partition plate; a box cover body matched with the box body is arranged above the DC-to-AC device; the DC-to-AC device comprises an inverter circuit, and the inverter circuit comprises a DC-DC booster circuit, a rectifying, filtering and voltage stabilizing circuit and a full-bridge inverter circuit; the outer surface of the box cover body is also provided with a load overload protection switch, and the load overload protection switch comprises a thermal bimetallic strip. According to the invention, by arranging the DC-to-AC device and the inverter circuit for improving the output power, the storage battery box has a DC-to-AC output function, and the storage battery box can supply power to high-power AC electric equipment; by arranging the load overload protection switch, the circuit can be disconnected when the load is not used, the load is protected, electric quantity loss is reduced, and meanwhile the circuit can be disconnected to protect the load and the circuit when the circuit is overloaded.
Owner:江西铂曼科技有限公司
LED lamp tube
InactiveCN105682306ALow powerLower working temperatureElectrical apparatusElectroluminescent light sourcesWork performanceWorking temperature
The invention discloses an LED lamp tube. The LED lamp tube comprises an LED lamp bead set and a drive device. The LED lamp beam set is combined and arranged in a 32-serial 4-parallel manner. The drive device comprises a rectification filtering unit and a constant current drive unit. An input end of the rectification filtering unit is connected with commercial power, an output end is connected with an input end of the constant current drive unit, and an output end of the constant current drive unit is connected with the LED lamp beam set so as to drive the LED lamp bead set to work. An output current of the constant current drive unit is 120mA, an output voltage is 96 V, and the model of the LED lamp beads is sMD2835. According to the invention, the number of the LED lamp beads is increased, and the current of each LED lamp bead is reduced, so that the power of the whole lamp bead set is lowered; in addition, compared with an existing 19W LED lamp tube, the LED lamp tube is more energy saving, the working temperature in the lamp tube is lowered, the working performance is more stable, and the service lifetime of the LED lamp tube is prolonged.
Owner:苏州希瑞特光电有限公司
Fin-type self-rotating anti-eccentric wear sucker rod
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Rectifying circuit and rectifying method thereof
ActiveCN104796018AReduce power consumption and heatLow costAc-dc conversionWhole systemsControl circuit
The invention discloses a rectifying circuit. The rectifying circuit comprises a first bridge arm, a second bridge arm, a fourth bridge arm and a third bridge arm, which are orderly connected into a loop; the first input end of the rectifying circuit is connected between the first bridge arm and the second bridge arm, the second input end of the rectifying circuit is connected between the third bridge arm and the fourth bridge arm, the first output end of the rectifying circuit is connected between the first bridge arm and the third bridge arm, and the second output end of the rectifying circuit is connected between the second bridge arm and the fourth bridge arm; each of the first bridge arm, the second bridge arm, the third bridge arm and the fourth bridge arm is provided with an MOS tube. According to the rectifying circuit, the MOS is rectified and applied to the equipment side at the receiving end; besides, in combination with a related control circuit, the rectification of the equipment side at the receiving end of the active Ethernet is realized, and the power consumption and the heat of the whole system are reduced, and consequently, the cost is lower than that of the controller scheme of the prior art, while the power consumption is lower than that of the rectifier scheme of the prior art.
Owner:北京中航融智科技有限公司
A Mechanically Rectified Piezoelectric Cantilever Vibration Energy Harvester
ActiveCN111313756BLarge vibration amplitudeProtect the maximum stressPiezoelectric/electrostriction/magnetostriction machinesEnergy harvesterEngineering
Owner:XI AN JIAOTONG UNIV
Water-cooling textile air conditioning system
InactiveCN111760408AEffective filteringEasy to moveEnergy recovery in ventilation and heatingCombination devicesAir volumeDust control
The invention discloses a water-cooling textile air conditioning system. The water-cooling textile air conditioning system is composed of an air inlet chamber, a pressurizing chamber, an exchange chamber, a pressure reducing chamber and a balance chamber which are sequentially arranged; the air inlet chamber mixes workshop full return air with fresh air and then sends the mixed air into the pressurizing chamber; the pressurizing chamber pressurizes the mixed air by controlling an air outflow amount, tames air flow and sends the air flow into the exchange chamber; the exchange chamber conductsspraying washing and vaporization through spraying water; dirty, hot and dry air in a workshop is subjected to cleaning, cooling and wet washing and exchange and then is fed into the pressure reducingchamber; the air subjected to pressure reduction through the pressure reducing chamber enters the balance chamber; and finally the balance chamber evenly feeds constant-temperature and constant-humidity clean air into a needed working area. A dust removal fan commonly used by a traditional textile air conditioner is omitted, air return and dust removal are completed in the same system, workshop flying catkin and dust are effectively filtered, workshop air flowing is also increased, the workshop air exchange frequency can be reduced, and the purpose of saving energy is achieved while constanttemperature and humidification are achieved.
Owner:WUHAN TEXTILE UNIV
Millimeter wave rectifying device implemented facing single chip
ActiveCN109635607AGuaranteed to workRectificationSensing by electromagnetic radiationElectricityEngineering
The embodiment of the invention provides a millimeter wave rectifying device implemented facing a single chip. The device comprises an antenna used for receiving millimeter waves and further comprisesa first isolation unit, a second isolation unit, a rectification unit and an energy storage unit, the first isolation unit is electrically connected with the antenna, the millimeter waves received bythe antenna are conducted, and isolation of direct-current components after rectification is achieved. The rectifying unit is used for receiving the alternating-current component transmitted by the first isolating unit, finishing rectifying and transmitting the rectifying component to the second isolating unit. The second isolation unit is electrically connected with the first isolation unit andthe rectification unit, and is used for isolating a high-frequency component in the rectification component and transmitting a direct-current component in the rectification component to the energy storage unit. The energy storage unit is used for storing the direct current transmitted by the second isolation unit and ensuring that the RFID can work normally after the size is reduced.
Owner:韩小西
Low-noise rotor-stator fan system
ActiveCN112431798AImprove working comfortRotation-Static Interference Noise ReductionPump componentsPumpsLow noiseImpeller
The invention provides a low-noise rotor-stator fan system, and belongs to the technical field of impeller machinery design. A motor, a stator fan assembly and a rotor fan assembly are sequentially arranged from back to front; the motor is fixedly connected to the rear face of a base of the stator fan assembly; an output shaft of the motor penetrates through a center hole of the base in the statorfan assembly and is fixedly connected with a center hole II of a coupling shaft in the rotor fan assembly B; the rear face of a support plate with a hole in a support is fixedly connected to the front face of an outer ring I in the stator fan assembly through a bolt; and the rotor fan assembly is located in a duct ring of the support. According to the low-noise rotor-stator fan system, a front edge and a tail edge wave sawtooth structure are designed on a stator fan, a bionic turbulent flow structure is designed on the front edge of a rotor fan, an inner sawtooth structure is designed on thetail edge of the rotor fan, and therefore the purpose of reducing rotor-stator interference noise of the rotor-stator fan system is achieved, the cooling efficiency of a large engineering vehicle heatdissipation system is improved, the rotor-stator interference noise is effectively reduced, and the purposes of saving energy and reducing noise are achieved.
Owner:JILIN UNIV
FET-based rectifier circuit
The application discloses a FET-based rectifier circuit which includes an energy storage load and a plurality of voltage rectification units. Each voltage rectification unit includes a first output end and a second output end. The energy storage load is connected in series between the first output end and the second output end of each voltage rectification unit and is configured to be charged anddischarged. Each voltage rectification unit includes a first inverter, a second inverter, a first field-effect transistor, and a second field-effect transistor, and is configured to rectify an input voltage signal. Because the field-effect transistors rectify the input voltage signal instead of rectifier diodes, the electric power consumed by the rectifier circuit is reduced, the heat generation is reduced, and integration can be achieved to reduce the occupied area of the circuit.
Owner:深圳市泛海数据科技有限公司
Mechanical rectification type piezoelectric cantilever beam vibration energy collector
ActiveCN111313756AGuaranteed rectificationFully contactedPiezoelectric/electrostriction/magnetostriction machinesEnergy harvesterMechanical engineering
The invention discloses a mechanical rectification type piezoelectric cantilever beam vibration energy collector. The energy collector comprises a base, a fixed supporting end fixed on the base, a piezoelectric cantilever beam fixed on the fixed supporting end, a mass block attached to the tip end of the piezoelectric cantilever beam and an electrode support. An upper movable electrode and a lowermovable electrode are respectively arranged on the upper surface and the lower surface of the mass block, and are respectively connected with two leads of the piezoelectric cantilever beam; the electrode support is fixed on the base; an upper fixed electrode, a middle fixed electrode and a lower fixed electrode are arranged on the electrode support from top to bottom; the upper fixed electrode islocated above the upper movable electrode; the middle fixed electrode is located between the upper movable electrode and the lower movable electrode; the lower fixed electrode is located below the lower movable electrode; and the upper fixed electrode is connected with the lower fixed electrode. According to the invention, piezoelectric alternating current generated by vibration can be convertedinto direct current through a mechanical rectifier, and voltage drop of a traditional electronic rectifier is avoided.
Owner:XI AN JIAOTONG UNIV
Volumetric-flow measuring apparatus
InactiveCN104776886AEasy to operateReduced assembly stepsDucting arrangementsVolume/mass flow by mechanical effectsEngineering
A volumetric-flow measuring apparatus (1) is provided using a measuring funnel (4) and a flow straightener (6) from a foldable material, which is disposed in the measuring funnel (4), configured such that the measuring funnel (4) and the flow straightener (6) are convertible between a folded-up transport position and an unfolded use position.
Owner:TESTO AG
An energy-feeding magnetorheological fluid energy absorber
ActiveCN106369101BSolve the problem that additional power supply needs to be configuredSolve the problem of additional configuration power supplySpringsNon-rotating vibration suppressionElectricityThrust bearing
Owner:合肥庐阳科技创新集团有限公司
Installation plate structure, air duct structure and air conditioner indoor unit
PendingCN112303028ARectificationImprove efficiencyPump componentsLighting and heating apparatusAir volumeStructural engineering
Owner:GREE ELECTRIC APPLIANCES INC
Chained double-bridge self-coupled stepdown topology
ActiveCN105450034ASolve power problemsSolution volumeEfficient power electronics conversionDc-dc conversionChain structureTransformer
The invention relates to a brand-new circuit topology, particularly relates to a chained double-bridge self-coupled stepdown topology, and aims at solving the disadvantage that the traditional stepdown DC converters are low in output power, large in volume, low in efficiency and low in reliability. According to the technology of the chained double-bridge self-coupled stepdown topology, two tubes are used for staggered driving, so that the output power can be enhanced by one time. The high-frequency transformers are designed into a coupling-free chained structure, so that the energy loss of coupling conversion is eliminated and the efficiency is improved. According to the chained double-bridge self-coupled stepdown topology, the stepdown power supplies can be provided with the following advantages under the requirement for same power and electric parameter: the volume is decreased by 50%, the output power is improved by one time, the efficiency is improved by 10% and the efficiency can be up to 96%.
Owner:AEROSPACE CHANGFENG CHAOYANG POWER SUPPLY
Explosion venting device with nozzle
Owner:YICHANG JI AN DUN FIRE FIGHTING TECH CO LTD
Range hood
PendingCN114811696AReduced diffusion areaReduce stabilityDomestic stoves or rangesLighting and heating apparatusExhaust fumesProcess engineering
The invention discloses a range hood, belongs to the technical field of household appliances, and is designed for solving the problems that oil smoke in an existing range hood is easy to diffuse and the like. The range hood provided by the invention comprises a box body, wherein a smoke exhaust channel is formed in the box body; the exhaust fume collecting hood is provided with an air inlet, and the air inlet is connected to the exhaust fume discharging channel through the exhaust fume collecting channel; and the rectifying plate is arranged between the smoke discharging channel and the smoke collecting channel, and the rectifying plate is configured to be capable of limiting the flowing path of the oil smoke. According to the range hood provided by the invention, the space where oil fume can reach when flowing in the range hood can be reduced, the diffusion area of the oil fume is reduced, the risk of oil stain permeation is reduced, and the problems that parts in the range hood are instable in work and short in service life due to permeation of the oil fume are solved. The rectifying plate realizes rectification of fluid in the range hood, the disorder degree of the fluid in the range hood is reduced, the oil smoke discharging efficiency is higher, the impact of the fluid on the interior of the range hood is smaller, and the noise is lower.
Owner:HANGZHOU ROBAM APPLIANCES CO LTD
A mechanical vibration-electric energy conversion device with integrated mechanical rectification mechanism
ActiveCN108173391BRectificationReduce reverse impactGearingMechanical energy handlingEngineeringHigh load
Owner:奇瑞新能源汽车股份有限公司
Water supply and condensation water cooperative system of direct air cooling unit based on double-fed system
ActiveCN113090540AImprove regulation efficiencyNo need for transformerSteam useSteam/vapor condensersPower gridElectric current flow
The invention relates to a water supply and condensation water cooperative system of a direct air cooling unit based on a double-fed system. The water supply and condensation water cooperative system comprises an air cooling island, a water supply pump, a condensation water pump, a double-frequency double-fed generator, a cooperative driving steam turbine and the like. According to the water supply and condensation water cooperative system, the cooperative driving steam turbine and the double-frequency double-fed generator are additionally arranged, the double-frequency double-fed generator can output currents with two frequencies at the same time, and after the driving power consumption of the water supply pump and the condensation water pump is met, redundant electric energy is conveyed to a factory power grid at 50 Hz. Under the variable working condition of the unit, the rotating speed of the water supply pump and the rotating speed of the condensation water pump are increased and decreased at the same time, the variable-frequency current output by the double-frequency double-fed generator can be subjected to cooperative driving adjustment according to the operation requirements of the water supply pump and the condensation water pump, and the rotating speed of the pumps is changed so as to change the operation working condition points of the pumps. According to the water supply and condensation water cooperative system of the direct air cooling unit based on the double-fed system, the operation requirements of the water supply and condensation water system can be met, the adjusting efficiency and the adjusting safety of the direct air cooling unit under the high-frequency and wide-load application scene in the future are improved, and the energy-saving potential is huge.
Owner:XIAN THERMAL POWER RES INST CO LTD +1
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