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33results about How to "Increase the voltage amplitude" patented technology
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Wireless communication device
ActiveUS20070047747A1Increase in amplitude of voltageHigh sound pressurePiezoelectric/electrostrictive microphonesSubstation/switching arrangement detailsVoltage amplitudeLoudspeaker
A wireless communication device includes a speaker grille, a built-in speaker provided behind the speaker grille, and an output amplifier connected to the built-in speaker. A voltage applied to the output amplifier is increased to a level higher than the level of voltage applied to the output amplifier while audio signals are being produced, and instead of the audio signals, low-frequency continuous signals are applied to the output amplifier. By increasing the voltage applied to the output amplifier to a level higher than the level of voltage applied to the output amplifier while audio signals are being produced, the amplitude of the voltage applied to the speaker is increased. Also, instead of the audio signals, low-frequency continuous signals are applied to the output amplifier so that the speaker produces a higher sound pressure than while audio signals are being produced to discharge water in the speaker grille under the sound pressure.
Owner:ICOM INC
MMC-based multi-port hybrid power electronic transformer and control method thereof
PendingCN106655805ABalance costAdapt to high voltage level occasionsReactive power adjustment/elimination/compensationAc-ac conversionBack structureNew energy
The invention provides an MMC-based multi-port hybrid power electronic transformer and a control method thereof. The power electronic transformer comprises a multi-winding transformer, a hybrid MMC converter, an LC filter, a direct-current output port and the like; the multi-winding transformer is a three-phase transformer, and comprises a primary winding and secondary windings a and b; the hybrid MMC converter is a back-to-back structure, and comprises a hybrid MMC structured AC / DC converter and a hybrid MMC structured DC / AC converter; the AC / DC converter and the DC / AC converter are connected through a direct-current side; and the direct-current side is leaded out, and can be used as a direct-current input / output port. The hybrid power electronic transformer provided by the invention comprises the traditional power transformer and the power electronic transformer, and integrates the advantages of the two; balance between the equipment effect and the cost is realized; the device comprises the direct-current port, so that access of a new energy, an energy storage unit and the like is convenient; furthermore, the device can realize reactive power compensation and dynamic voltage restorer at the same time; the electric energy quality of a power grid is further improved; individual-phase control is adopted in the control strategy aspect; and thus, the control strategy flexibility is improved.
Owner:ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
Lightning arrester operation analog simulation system
InactiveCN103207336AAchieving dual output characteristicsFirmly connectedElectrical testingHuman–machine interfaceElectric power system
The invention provides a lightning arrester operation analog simulation system. The lightning arrester operation analog simulation system mainly comprises a data processing center, a data interactive processing interface module, a human-computer interface, an optical fiber data communication module, a power supply control measurement module, a harmonic wave power module, a power frequency high-voltage power module, a voltage divider, a high-voltage lightning arrester, a temperature and humidity measuring module, a lightning arrester resistive current precision measurement module and a SO2 environmental testing module. The data processing center, the human-computer interface and the data interactive processing interface module perform operation through a computing control platform, a host machine of the computing control platform is an industrial control computer and is provided with an optical fiber conversion module, and the host machine of the computing control platform is respectively connected with the power supply control measurement module, the lightning arrester resistive current precision measurement module and the SO2 environmental testing module through the optical fiber conversion module. In functional roles, the system can simulate joint effects of double factors including an electrical characteristic and a natural environment to simulate operation condition of an actual electric power system lightning arrester.
Owner:CHINA ELECTRIC POWER RES INST +1
Wireless communication device
ActiveUS8135149B2Increase sound pressureIncrease the voltage amplitudePiezoelectric/electrostrictive microphonesSubstation/switching arrangement detailsEngineeringContinuous signal
A wireless communication device includes a speaker grille, a built-in speaker provided behind the speaker grille, and an output amplifier connected to the built-in speaker. A voltage applied to the output amplifier is increased to a level higher than the level of voltage applied to the output amplifier while audio signals are being produced, and instead of the audio signals, low-frequency continuous signals are applied to the output amplifier. By increasing the voltage applied to the output amplifier to a level higher than the level of voltage applied to the output amplifier while audio signals are being produced, the amplitude of the voltage applied to the speaker is increased. Also, instead of the audio signals, low-frequency continuous signals are applied to the output amplifier so that the speaker produces a higher sound pressure than while audio signals are being produced to discharge water in the speaker grille under the sound pressure.
Owner:ICOM INC
Insulation aging test device used for converter high voltage pulse equipment
InactiveCN1793989AMeet the requirements of insulation aging testSmall distortionElectrical testingTransformerFrequency conversion
An insulation ageing test device of frequency conversion high voltage pulse equipment is prepared as connecting output end of pulse generator to primary edge of high voltage boosting transformer with its secondary edge being connected to wire in insulation sleeve, applying 300H2 to lkH2, 1kH2 to 5kH2 , 5kH2 to 10k H2 and 10k H2 to 20k H2 as operation frequency of high voltage boosting transformer alternately, connecting said boosting transformer to output of pulse generator for outputting square wave to meet requirements of insulation ageing test.
Owner:SOUTHWEST JIAOTONG UNIV
Three-grade low-voltage power distribution network voltage control device and control method thereof
InactiveCN106385041ARealize unified and comprehensive managementMake full use of adjustment abilityPolyphase network asymmetry elimination/reductionReactive power adjustment/elimination/compensationPower qualityLow voltage
The invention discloses a three-grade low-voltage power distribution network voltage control device and a control method thereof. The device comprises an integrated control system, a three-phase unbalance control device, a dynamic reactive compensating device and a line voltage adjusting device. The three-phase unbalance control device, the dynamic reactive compensating device and the line voltage adjusting device are successively connected in the line of the low-voltage power distribution network. The integrated control system performs coordinated unified control on each device, thereby performing voltage control on the low-voltage power distribution cabinet according to a three-step sequence of line voltage adjusting, three-phase unbalance control and dynamic reactive compensation. According to the control method of the three-grade low-voltage power distribution network voltage control device, first-step voltage adjustment, second-step three-phase unbalance control and third-step dynamic reactive compensation are successively performed according to data which are acquired by each device. The three-grade low-voltage power distribution network voltage control device can realize electric energy quality unified and comprehensive control on three-phase unbalance, low power factor, low end voltage, etc. Furthermore the three-grade low-voltage power distribution network voltage control device and the control method have advantages of simple control realization, high control effect, capability of suppressing resonance and preventing overregulation, etc.
Owner:ZHUZHOU NAT ENG RES CENT OF CONVERTERS
Display Device And Method For Driving Same
InactiveUS20120086700A1Reduce the amplitudeVoltage differenceCathode-ray tube indicatorsNon-linear opticsCapacitanceDisplay device
There is provided a display device in which even if the amplitude of the voltage of a source wiring line is relatively small, the amplitudes of the voltages of subpixels can be increased and the voltage difference between the subpixels can be furthermore increased. In at least one example embodiment, voltages of equal magnitudes are provided to pixel electrodes in a first subpixel portion and a second subpixel portion from a source wiring line. Thereafter, by changing an applied voltage to an auxiliary capacitance wiring line, voltages of different magnitudes are provided to the pixel electrodes in the first subpixel portion and the second subpixel portion. By this, a voltage difference is generated between the pixel electrode in the first subpixel portion and the pixel electrode in the second subpixel portion.
Owner:SHARP KK
Apparatus and method of fluid level measurement
InactiveUS6895815B2Increase the voltage amplitudeIncrease amplitudePiezoelectric/electrostriction/magnetostriction machinesMachines/enginesVoltage amplitudeCoupling
An apparatus for fluid level measurement comprises an upright tube (10) extending into a storage tank (12) substantially the full height distance of the tank (12). An acoustic transducer (14) is positioned at the top of the tube (10) and adapted to emit a sound pulse to be bounced off the surface (16) of the fluid level within the tube (10) and to receive a reflected pulse. Means is provided for measurement of the time of arrival of the reflected sound pulse. An acoustic coupling means is provided for the transducer (14) to shape and increase the amplitude of the pulse emitted from the transducer (14) together with an increase in the amplitude of the voltage produced by the transducer (14) in response to the received reflected pulse.
Owner:SENSOR SYST JERSEY +1
Output-level-controlling converter device
InactiveUS20100246852A1Reduce voltage gainReduce output powerGain controlAmplifier with semiconductor-devices/discharge-tubesVoltage amplitudeEngineering
An output-level-controlling converter device, including a ramp generator, used to generate a ramp signal; and an analog-to-PWM converter, said converter is used to perform conversion digitally for a reference signal by making use of said ramp signal, and output a pulse-width-modulation signal; and a pulse width detector, used to detect a duty cycle of said pulse-width-modulation signal, and output a gain control voltage signal based on said duty cycle, and when said duty cycle is close to 0% or 100%, said ramp generator is used to increase a voltage amplitude of said ramp signal based on a voltage value of said gain control voltage signal, hereby increasing or decreasing said duty cycle of said pulse-width-modulation signal for reducing voltage gain of said reference signal.
Owner:TAI 1 MICROELECTRONICS CORP
Device and method for actively inhibiting rollback movement of parasitic motion principle piezoelectric actuator
PendingCN109756148AImprove athletic characteristicsGuaranteed linear output characteristicsPiezoelectric/electrostriction/magnetostriction machinesElectricityPiezoelectric actuators
The invention relates to a device and a method for actively inhibiting the rollback movement of a parasitic motion principle piezoelectric actuator, and belongs to the field of precision machinery. The device comprises a foundation bed, a movable sub unit, a driving unit and a pre-pressure regulation unit, wherein the movable sub unit is installed on the boss of the foundation bed; the pre-pressure regulation unit is fixed on the foundation bed through bolts; and the driving unit is installed on the pre-pressure regulation unit. By use of the method, through a synergistic effect of a driving piezoelectric stack and an improving piezoelectric stack in the driving unit, the pressure of the parasitic principle piezoelectric actuator is constant in a driving process so as to realize the activeinhibition of the rollback movement. The device and the method have the advantages that the rollback movement can be obviously inhibited, ideal stepping movement is realized, and an influence generated by system nonlinearity can be eliminated to a certain degree so as to be convenient for subsequent precise control. The device and the method have a wide application prospect in the fields including precise and ultraprecise positioning, precise measurement, precise machining and assembling, biological inheritance engineering, material surface performance detection and the like.
Owner:唐金岩
UHV lightning arrester simulation training system
InactiveCN107578679AImprove teaching qualityIncrease the voltage amplitudeElectrical testingEducational modelsHuman–machine interfaceElectric power system
The invention relates to an UHV lightning arrester simulation training system, which comprises a data processing center, a data interaction processing interface module, a man-machine interface, an optical fiber data communication module, a power supply control measurement module, a harmonic power supply module, a power frequency high-voltage power supply module, a voltage divider, a high-voltage lightning arrester, a temperature and humidity measurement module, a lightning arrester resistive current precision measurement module and an SO2 environment testing module, wherein the data processingcenter, the man-machine interface and the data interaction processing interface module are completed by means of a calculation control platform, a host of the calculation control platform is an industrial control computer equipped with an optical fiber conversion module, and the host of the calculation control platform is connected with the power supply control measurement module, the lightning arrester resistive current precision measurement module and the SO2 environment testing module. The UHV lightning arrester simulation training system can simulate actual operating conditions of a powersystem lightning arrester through combined action of simulating two factors including the electrical properties of the power system lightning arrester and natural environment, and improves the teaching quality.
Owner:STATE GRID OF CHINA TECH COLLEGE
Lightning arrester resistive current source simulation system
InactiveCN103207378AAchieving dual output characteristicsFirmly connectedCurrent/voltage measurementCapacitanceHuman–machine interface
The invention provides a lightning arrester resistive current source simulation system. The lightning arrester resistive current source simulation system is characterized by mainly comprises a task data processing center, a data interactive processing interface module, a human-computer interface, an optical fiber data communication module, a synchronous control measurement module, a harmonic wave power module, a triangular wave pulse power module, a voltage divider module, a precise current measurement module, an adjustable precise capacitor module and an adjustable precise resistor module. The task data processing center, the human-computer interface and the data interactive processing interface module perform operation through a computing control platform, a host machine of the computing control platform is an industrial control computer and is provided with an optical fiber conversion module, and the industrial control computer is respectively connected with the synchronous control measurement module, the precise current measurement module, the adjustable precise capacitor module and the adjustable precise resistor module. The lightning arrester resistive current source simulation system fills the blank of domestic lightning arrester on-line monitoring devices in the resistive current calibration aspect.
Owner:CHINA ELECTRIC POWER RES INST +1
Resistance measuring circuit, temperature detecting circuit and charging gun
ActiveCN109765431AIncrease the voltage amplitudeImprove signal-to-noise ratioResistance/reactance/impedenceThermometers using electric/magnetic elementsSignal-to-noise ratio (imaging)Electrical resistance survey
The invention discloses a resistance measuring circuit, a temperature detecting circuit and a charging gun. The resistance measuring circuit includes a current-limiting resistance module, a switch module and a sampling module, the switch module is on and off according to a preset period, when the switch module is on, the current-limiting resistance module is connected to the ground, and a currentflows through a tested resistor; when the switch module is off, the current-limiting resistance module is disconnected to the ground, and no current flows through the tested resistor; in an on-off period of the switch module, the time of turning-on and turning-off is adjusted, and thus the time that the current flows through the tested resistor is changed so as to keep the power of the tested resistor in a preset range. The sampling module is used for sampling the voltage of the current-limiting resistance module, and a sampling voltage is output; and the sampling voltage is used for calculating the resistance of the tested resistor. According to the resistance measuring circuit, the temperature detecting circuit and the charging gun, a discontinuous sampling method is adopted, it can be guaranteed that current passing through the tested resistor is increased in a short time under the condition that the power of the tested resistor is not increased, the partial voltage of the tested resistor is increased, thus the signal-to-noise-ratio is increased, and the accuracy of testing is improved.
Owner:KEHUA DATA CO LTD
Power system and control method thereof
ActiveUS20140218002A1Total current dropConstant output powerApparatus without intermediate ac conversionElectric variable regulationVoltage amplitudeElectric power system
The present invention provides a power system and controlling method thereof. The power system includes: pulse width modulation (PWM) power source, voltage detection unit, current detection unit and feedback signal generation unit. PWM power source receives external DC input, performs PWM on received external DC input, and supplies PWM output obtained through PWM from the DC output terminal to a device expecting power supply. Voltage detection unit detects voltage amplitude of PWM output. Current detection unit detects current amplitude of PWM output. Feedback signal generation unit generates feedback signal and supplies generated feedback signal to PWM power source. PWM power source adjusts the voltage amplitude and current amplitude of the PWM output based on the received feedback signal.
Owner:CHANGSHA HKC OPTOELECTRONICS CO LTD
Device for Ion Sorting by M/Z
ActiveUS20170263431A1Increase the voltage amplitudeImprove the duty cycleStability-of-path spectrometersVoltage amplitudeIon
An RF voltage is applied across each electrode of a first array of evenly spaced, parallel, and coplanar electrodes and its corresponding electrode of a second array of evenly spaced, parallel, and coplanar electrodes. The RF voltage varies in amplitude according to an RF voltage amplitude gradient. The RF voltage produces an array of different quadrupole RF electric fields in a uniform gap between the first array and the second array. A DC voltage is superimposed on each electrode of the first array and its corresponding electrode of the second array. The DC voltage varies according to a DC voltage gradient in order to produce a DC electric field in the uniform gap. When ions are introduced in the uniform gap, the DC electric field causes the ions to drift toward quadrupole RF electric fields with increasing RF voltage amplitudes where the ions are trapped according to their m / z.
Owner:DH TECH DEVMENT PTE
Dynamic reactive power adjustment method of power distribution network containing distributed power supply
InactiveCN106169766AIncrease the voltage amplitudeReactive power adjustment/elimination/compensationReactive power compensationProbabilistic load flowGenetic algorithm
The invention provides a dynamic reactive power adjustment method of a power distribution network containing a distributed power supply. The method comprises the steps of building a reactive power adjustment objective function, and encoding parameters in a power distribution network system to carry out fitness calculation on the encoded data by combining a genetic algorithm, thereby obtaining an optimal solution of the objective function under the condition of separately planning the distributed power supply and a capacitor. The optimal solution is determined through the improved genetic algorithm by utilizing an expected value, obtained by a probabilistic load flow calculation method, of an active power network loss in modeling of dynamic reactive power adjustment in various regions, so that the voltage magnitude of an installation mode in the power distribution network can be improved.
Owner:HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD +3
Multi-switch synchronous isolation driving circuit with over-current protection
InactiveCN109638797AIncrease the voltage amplitudeSimple circuit structureEmergency protective arrangements for limiting excess voltage/currentPower conversion systemsElectricityConductor Coil
The invention provides a multi-switch synchronous isolation driving circuit with over-current protection, and the circuit is used for synchronously driving a plurality of semiconductor switch tubes. The circuit comprises a control circuit which is used for generating and outputting an analog signal; a primary side driving circuit which is electrically connected with the control circuit and is usedfor converting the analog signal into a bipolar pulse signal; a magnetic isolation transformer which is provided with a primary side winding electrically connected with the primary side driving circuit, a plurality of cross-core magnetic rings connected to the primary side winding in series in an isolation manner, and a secondary side winding wound on the cross-core magnetic rings, and is used for transmitting the bipolar pulse signal; a secondary side driving control circuit which is electrically connected with a secondary side winding of the magnetic isolation transformer and is used for receiving the bipolar pulse signal and generating an isolation driving signal, wherein the primary side driving circuit is used for generating the bipolar pulse signal with adjustable pulse width, phaseand frequency, and the secondary side driving control circuit comprises a driving module and an overcurrent protection module.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
An output current limiting control method of an inverter distributed power supply
InactiveCN105470991BIncrease the voltage amplitudeReduce asymmetrySingle network parallel feeding arrangementsVoltage amplitudeCurrent limiting
The invention discloses an output current-limiting control method for an inversion type distributed power supply. The maximum of output active power of the inversion type distributed power supply under symmetrical faults and under unsymmetrical faults can be ensured; meanwhile, the positive sequence voltage amplitude value output by the inversion type distributed power supply is improved, the negative sequence voltage amplitude value is reduced, and the degree of asymmetry of output voltage of the inversion type distributed power supply is reduced; specific to different current-limiting methods, a relatively high voltage output level of the inversion type distributed power supply is ensured under unsymmetrical faults, so that a low voltage protection action is not triggered easily; specific to the negative sequence overcurrent protection, the negative sequence current output is limited by the current-limiting method provided by the invention, so that the negative sequence overcurrent protection is relatively not triggered easily; and compared with a non-current-limiting control method and other two current-limiting control methods, the output current-limiting control method provided by the invention can both better ensure the stable operation of the inversion type distributed power supply without logging out under symmetrical faults and under unsymmetrical faults, so that the system stability is improved.
Owner:STATE GRID GASU ELECTRIC POWER RES INST +2
Communication chip for single-wire power supply communication
The invention discloses a communication chip for single-wire power supply communication, the communication chip is connected with other communication chips through a power supply communication line, the communication chip comprises a transmitting circuit, the transmitting circuit is connected to the power supply communication line to generate a transmitting signal on the power supply communication line, the transmitting circuit generates a full-modulation transmitting signal in a first modulation working mode and generates a non-full-modulation transmitting signal in a second modulation working mode; wherein the modulation speed of the non-full modulation sending signal is higher than the modulation speed of the full modulation sending signal. Through the above mode, the communication speed can be improved while single-line power supply is realized.
Owner:NATIONZ TECH INC
Signal input circuit for disaster prediction terminal
InactiveCN104298155AIncrease the voltage amplitudeImprove anti-interference abilityProgramme controlComputer controlHemt circuitsControl theory
The invention discloses a signal input circuit for a disaster prediction terminal. The signal input circuit comprises a triode T1 and a triode T2, the base electrode of the triode T1 is connected with a power source V1 through a switch S, the collector electrode of the triode T1 is connected to the negative electrode of a diode D1, the positive electrode of the diode D1 is connected with a power source V2 through a resistor R2, the positive electrode of the diode D1 is connected to the base electrode of the triode T2, the collector electrode of the triode T2 is connected to the input end of a chip 74LS240 and connected with a power source V3 through a resistor R3, the voltage value of the power source V1, the voltage value of the power source V2 and the voltage value of the power source V3 become smaller in sequence, and the emitting electrode of the triode T1 and the emitting electrode of the triode T2 are connected with the ground. The signal input circuit is suitable for long distance transmission of data, outside interference is avoided, and the disaster prediction accuracy of the disaster prediction terminal is improved.
Owner:CHENGDU HANKANG INFORMATION IND
High-voltage pulse signal generator and circuit and circuit parameter calculation method thereof
PendingCN110361571AIncrease the voltage amplitudeExtended Spectral RangeElectrical measurement instrument detailsElectrical testingCapacitanceFrequency spectrum
The invention discloses a high-voltage pulse signal generator and circuit and a circuit parameter calculation method thereof. A high-voltage direct current source uses a charging resistor to charge amain capacitor via a wave head adjusting resistor. The main capacitor, the wave head adjusting resistor, a wave tail adjusting resistor, a primary storage capacitor and a controllable trigger switch form a primary microsecond pulse loop to generate wavefront-adjustable microsecond pulse wave; the primary storage capacitor, a steepening switch, a secondary storage capacitor, and a wave modulation resistor form a secondary nanosecond pulse output loop to output a high-voltage nanosecond pulse wave; according to the capacitance value of a load inlet, a proper wave adjusting resistor is selected and frequency domain distribution of the output pulse is adjusted. The circuit has advantages of large output pulse spectrum range and high voltage; and the first-end voltage pulse frequency spectrum range of the converter transformer is large and the distribution is uniform. The amplitude of the output voltage can be controlled via the input. The circuit is suitable for the high-voltage pulse generator of the transformer time domain characteristics measurement.
Owner:XI AN JIAOTONG UNIV +1
Output current-limiting control method for inversion type distributed power supply
InactiveCN105470991AIncrease the voltage amplitudeReduce asymmetrySingle network parallel feeding arrangementsVoltage amplitudeCurrent limiting
The invention discloses an output current-limiting control method for an inversion type distributed power supply. The maximum of output active power of the inversion type distributed power supply under symmetrical faults and under unsymmetrical faults can be ensured; meanwhile, the positive sequence voltage amplitude value output by the inversion type distributed power supply is improved, the negative sequence voltage amplitude value is reduced, and the degree of asymmetry of output voltage of the inversion type distributed power supply is reduced; specific to different current-limiting methods, a relatively high voltage output level of the inversion type distributed power supply is ensured under unsymmetrical faults, so that a low voltage protection action is not triggered easily; specific to the negative sequence overcurrent protection, the negative sequence current output is limited by the current-limiting method provided by the invention, so that the negative sequence overcurrent protection is relatively not triggered easily; and compared with a non-current-limiting control method and other two current-limiting control methods, the output current-limiting control method provided by the invention can both better ensure the stable operation of the inversion type distributed power supply without logging out under symmetrical faults and under unsymmetrical faults, so that the system stability is improved.
Owner:STATE GRID GASU ELECTRIC POWER RES INST +2
Full-control rectification and full-control inversion melt-blown cloth electret power supply based on PWM technology
InactiveCN112737373AFix stability issuesSolve problems such as low voltageAc-dc conversionDc-dc conversionCapacitanceThermodynamics
The invention relates to the technical field of melt-blown cloth electret power supplies, in particular to a PWM technology-based fully-controlled rectification and fully-controlled inversion melt-blown cloth electret power supply which comprises a power grid alternating-current voltage va, an alternating-current input inductor L, a fully-controlled rectifier bridge, a filter capacitor C, a fully-controlled inverter bridge and a high-voltage pack, wherein the power grid alternating voltage va is connected with the input end of the full-controlled rectifier bridge, the output end of the full-controlled rectifier bridge is connected with the input end of the full-controlled inverter bridge, the output end of the full-controlled inverter bridge is connected with the high-voltage pack, and the filter capacitor C is connected in parallel between the full-controlled rectifier bridge and the full-controlled inverter bridge. The design of the full-controlled rectifier bridge and the application of double closed-loop control are adopted, so that the amplitude of the pre-stage rectification output voltage is higher, the boosting transformation ratio of the boosting transformer is reduced, the reliability of the circuit is improved, reactive components are reduced through current loop control based on a PR regulator, and the harmonic pollution of a melt-blown power supply to a power grid is inhibited.
Owner:NANTONG UNIVERSITY
High-capacity optical storage all-in-one machine and control method thereof
PendingCN111817315AIncrease the voltage amplitudeImprove frequency stabilityClimate change adaptationSingle network parallel feeding arrangementsFrequency stabilizationVoltage amplitude
The invention discloses a high-capacity optical storage all-in-one machine. The all-in-one machine comprises an energy storage battery pack, the two ends of the energy storage battery pack are connected with the input end of a three-level DC / DC converter, the output end of the three-level DC / DC converter is connected with a three-level DC / AC converter direct-current bus, and the three-level DC / ACconverter direct-current bus is further connected with a photovoltaic array. Transient / static frequency adjustment of the voltage frequency and amplitude of the grid-connected point is introduced andcan be directly connected with an electric power system, the voltage amplitude and frequency stability of the electric power system can be improved, and the problems that at present, a power grid hasa bottleneck in consumption of photovoltaic power generation electric energy, and the electric power system is unstable in operation are solved. The invention further discloses a control method of thehigh-capacity optical storage all-in-one machine.
Owner:田禾信息科技(上海)有限公司
Dual-input signal synchronous detection circuit
PendingCN113572468AReduce in quantitySave hardware resourcesLogic circuit interface arrangementsHemt circuitsEngineering
The invention discloses a dual-input signal synchronous detection circuit. The circuit comprises a signal input module; an input end IN1 and an input end IN2 of the signal input module are respectively connected with a first detection signal output end and a second detection signal output end of an external electronic circuit; the power supply input end VDD1 of the signal input module is connected with the power supply output end of the first power supply module; the output end Z1 of the signal input module is connected with the input end 1 of the signal output module; the output end of the signal input module is connected with the input end 2 of the signal output module; the output end Z3 of the signal input module is connected with the input end 3 of the signal output module; the power supply input end VDD2 of the signal output module is connected with the power supply output end of the second power supply module; the output end OUT of the signal output module is connected with one input / output port of the detection chip. According to the invention, four combination states of two input signals can be represented through one output port, so that precious detection chip hardware resources are saved.
Owner:LISHEN (QINGDAO) NEW ENERGY CO LTD
Medium-voltage direct current direct supply system and method suitable for multi-station fusion
PendingCN113746126AHigh harmonic contentImprove system efficiencyAc-dc conversion without reversalElectric power transfer ac networkControl engineeringElectric network
The invention discloses a medium-voltage direct current direct supply system suitable for multi-station fusion. The system is of a three-stage topological structure comprising a front-stage medium-voltage rectification unit, a middle direct-current supporting unit and a rear-stage direct-current conversion unit. The input end of the front-stage medium-voltage rectification unit is connected with an external input power distribution unit through an alternating-current bus and then rectified and converted through an internal shift-phase uncontrolled rectification topological structure, the output end of the front-stage medium-voltage rectification unit is electrically connected with the middle direct-current supporting unit through a direct-current bus, the output end of the middle direct-current supporting unit is electrically connected with the rear-stage direct-current conversion unit, and a pulse waveform with variable pulse width is output. According to the invention, the problems of low conversion efficiency, too many intermediate links, low system power density, interconnection of a plurality of units with different voltages and power levels, reconfigurability of an internal electric network of the system and the like in an internal power supply scheme of an existing transformer substation are solved, and meanwhile, the overall equipment cost is reduced. In addition, the invention further provides a medium-voltage direct current direct supply method suitable for multi-station fusion.
Owner:STATE GRID JIANGSU ECONOMIC RES INST +2
Lightning arrester operation analog simulation system
InactiveCN103207336BIncrease the voltage amplitudeWide range of harmonic ordersElectrical testingHuman–machine interfaceElectric power system
Owner:CHINA ELECTRIC POWER RES INST +1
High voltage pulse multi-strike anti-piracy device
ActiveCN104796034BIncrease the voltage amplitudeHigh repetition rateVessel cleaningHullsVoltage pulseLow voltage
A high-voltage pulse multi-strike anti-piracy device, including a low-voltage direct current power supply, a low-voltage controllable switch, a high-voltage direct current charging unit, a high-voltage pulse multi-strike generator and a discharge electrode; the high-voltage direct current charging unit includes a rectifier, a charging unit capacitor C0 and a pulse The transformer and the rectifier include two parallel bridge arms; the high-voltage pulse multi-flash generator includes the generator current input terminal, high-voltage discharge terminal, charging resistor R1, trigger resistor R3, grounding resistor R2, high-voltage controllable switch, inductor generator L, generator charging capacitor C1 and generator triggering capacitor C2, and the high voltage discharge terminal is electrically connected to the discharge electrode. The high-voltage multi-pulse of the present invention has the characteristics of short duration (from tens of microseconds to hundreds of microseconds), high voltage amplitude (up to 200kV or even higher), high repetition frequency (above 100Hz), etc., although the instantaneous power It is very large, but the duration is short, and the power consumption is around several kVA.
Owner:锡瑞迪船用动力系统(上海)有限公司
Insulation aging test device used for converter high voltage pulse equipment
InactiveCN100348989CMeet the requirements of insulation aging testSmall distortionElectrical testingTransformerFrequency conversion
An insulation ageing test device of frequency conversion high voltage pulse equipment is prepared as connecting output end of pulse generator to primary edge of high voltage boosting transformer with its secondary edge being connected to wire in insulation sleeve, applying 300H2 to lkH2, 1kH2 to 5kH2 , 5kH2 to 10k H2 and 10k H2 to 20k H2 as operation frequency of high voltage boosting transformer alternately, connecting said boosting transformer to output of pulse generator for outputting square wave to meet requirements of insulation ageing test.
Owner:SOUTHWEST JIAOTONG UNIV
Resistance measurement circuit, temperature detection circuit and charging gun
ActiveCN109765431BIncrease the voltage amplitudeImprove signal-to-noise ratioResistance/reactance/impedenceThermometers using electric/magnetic elementsElectrical resistance and conductanceCurrent limiting
Owner:KEHUA DATA CO LTD
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