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98results about How to "Meet voltage requirements" patented technology
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High voltage system electric voltage and insulaiton measurement circuit
ActiveCN101158701AMeet voltage requirementsSimple designResistance/reactance/impedenceCurrent/voltage measurementMeasurement deviceHigh-voltage direct current
The present invention provides a measurement device for the voltage of a high voltage system and an insulation resistance, which comprises a high voltage system direct current voltage sampling module, an insulation resistance sampling module, a signal processing module, a high voltage system isolation module, a primary controller module, a CAN bus interface module and a power supply module. The high voltage system direct current voltage sampling module and the insulation resistance sampling module are connected with a positive end of a high voltage direct current system by sampling resistances R36 and R38, and connected with a negative end of the high voltage direct current system by the sampling resistances R37 and R39. The sampling voltage is directly transmitted to the signal processing module through amplifiers U16A and U17B, and voltage signals U1 and U2 are output. The voltage signals U1 and U2 are isolated after connecting with the high voltage system isolation module, and output signals AD1 and AD2 are directly input an AD converter of the primary controller module. Pins164 and 265 of a primary controller are connected with the CAN bus interface module. A power supplying module is connected with a direct current power supply +9V-+18V which can supply the whole system. The present invention can transmit the measured insulation resistance and the direct current voltage to a CAN bus and can be connected to vehicle systems easily.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Battery pack with internal serial structure and manufacture method thereof
InactiveCN102104167AMeet voltage requirementsReduce volumeFinal product manufactureSecondary cells manufactureElectrical batteryEngineering
The invention provides a battery pack with an internal serial structure and a manufacture method thereof. The battery pack comprises N pole groups, N-1 baffles with conductivity, an electrolyte and sealing rings in a battery shell and top covers on the battery shell. The manufacture method comprises the following steps of: separating two adjacent pole groups with the baffles; connecting the anode of one pole group with a baffle; connecting the cathode of the other pole group with the other edge of the baffle; and serially connecting the adjacent pole groups. The battery pack is designed according to a needed voltage so that a plurality of unit battery cores are connected serially in the same battery shell for use as a whole to meet the voltage requirement. The battery pack provided by the invention has smaller battery size and lighter mass under the same voltage while meeting the voltage requirement on various electric appliances and has low requirement for a battery packing technology. Meanwhile, due to no connectors for conduction among cell batteries when the batteries are combined, the external short circuit of the batteries can be reduced.
Owner:HUNAN CORUN NEW ENERGY CO LTD
Charger outputting different voltages in self-adaptation mode and implementation method thereof
ActiveCN103986217AIncrease charging voltageGuaranteed high current chargingBatteries circuit arrangementsSecondary cells charging/dischargingSelf adaptiveCharge voltage
The invention provides a charger outputting different voltages in a self-adaptation mode and an implementation method of the charger. The charger comprises a charging protocol recognition unit and a charging control unit, wherein the charging protocol recognition unit is used for detecting a terminal detecting port, recognizing a charging protocol matched with the mobile terminal and outputting a corresponding feedback signal; the charging control unit is used for feeding back a signal and controlling the output of the voltage regulated in the matched charging protocol to the terminal detecting port. The method includes the steps that the terminal detecting port of the mobile terminal is detected, the charging protocol matched with the mobile terminal is determined, and the current output voltage is changed to the voltage regulated in the charging protocol and then output to the terminal detecting port. According to the embodiment of the charger outputting different voltages in the self-adaptation mode and the implementation method of the charger, the charger can output multiple voltages in the self-adaptation mode, and the requirement of different terminals for voltage can be met; charging voltage can be boosted, large-current charging is guaranteed, EMC is reduced, and the requirement for peripheral components can also be lowered.
Owner:NUBIA TECHNOLOGY CO LTD
Urban rail maglev train traction converter output device
ActiveCN102136809AReduce voltageReduce capacity requirementsConversion without intermediate conversion to dcDc-ac conversion without reversalPower inverterOutput transformer
The invention discloses an urban rail maglev train traction converter output device. The device comprises an inverter, an input switch cabinet and an output converting device, wherein the input switch cabinet is in circuit connection with an input end of the inverter; the output converting device is in circuit connection with an output end of the inverter; the output end of the output converting device is in circuit connection with a plurality of external motors; the inverter comprises a plurality of inverter modules; and the output converting device comprises an output transformer which is in circuit connection with the output end of the inverter and an output switch device which is in circuit connection with the output end of the output transformer. The urban rail maglev train traction converter output device is provided with a plurality of same inverter modules and reduces the capacity demand of the traction inverter, thereby reducing the weight and the volume of the inverter and being beneficial to the arrangement of equipment; the voltage resistant grade and the output current demand of an inverter power device are reduced, and the cost of a traction system is reduced; the voltage formed by combining two inverters is high, and the speed-up capability of a train high-speed section can be improved; and the redundancy and the reliability of the system are improved.
Owner:TONGJI UNIV +1
Independent photovoltaic power generation system and working method for tracking maximum power thereof
InactiveCN101710805ASimple structureIncrease the output voltageBatteries circuit arrangementsPV power plantsWork planTransformer
An independent photovoltaic power generation system comprises a solar cell component, a DC converter and a storage battery. A working method for the tracking maximum power of the independent photovoltaic power generation system is characterized in that the method comprises the following steps: establishing the independent photovoltaic power generation system and determining the composition of the system; determining the input signal and the output signal of the DC converter; determining the relationship between the action for tracking the maximum power of the solar cell component and the action of the DC converter; and determining the work plan for tracking the maximum power of the system. The invention has the following advantages: (1) the structure is structure and has various loads; (2) the adoption of tracking method of maximum power can improve the working efficiency of the solar cell to ensure that the maximum electric energy can be supplied to the load; (3) simultaneously, a DC booster transformer is installed between the solar cell and the load to improve the output voltage of the photovoltaic cell so as to meet the requirements for voltage of the load.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
Modular quick-replacement power battery unit of electromobile
InactiveCN105742554AReduce volumeStandardized and unifiedCurrent conducting connectionsSecondary cellsModularityElectricity
The invention discloses a modular quick-replacement power battery unit of an electromobile. The main body is provided with a plurality of same battery cells, the middle parts of the two opposite sides of each battery cell outwards extend and protrude to form a positive tab and a negative tab, the two ends of each battery cell are fixed on two vertical support plates by the positive tab and the negative tab, the battery cells are connected in series to form a battery module with the support plates, the battery module is arranged in a rectangular battery box, a gap between the battery box and the battery module is filled with a heat conduction material, and a positive electrode and a negative electrode of the battery module are jointly led out from a surface of the battery box and are arranged to be a positive connection plug and a negative connection plug. The power battery unit adopts a modular design, can be configured on different vehicles and is high in universality; during configuration, different configuration modes can be achieved according to actual conditions of a consumer; and through a battery replacement mode, the problems of long charging time and high charging requirement are solved.
Owner:CHONGQING WIRELESS OASIS COMM TECHCO
Power battery of electric automobile
InactiveCN105720220AReduce volumeStandardized and unifiedCurrent conducting connectionsSecondary cellsPower batteryElectricity
The invention discloses a power battery of an electric automobile. The power battery is composed of a plurality of modularized battery units which are in serial, parallel or serial-parallel connection; and all the battery units are completely the same. The power battery is of modularized design, can be configured on different vehicle types, has good universality, has different configuration forms according to the actual conditions of consumers when the power battery is configured; and the problems of long charging time and high charging demand are solved through a power changing mode.
Owner:力帆科技(集团)股份有限公司
Anode corrosion foil manufacturing method and aluminum foil corrosion electrolytic cell
ActiveCN104835647ATroubleshoot technical issues with inconsistent shadesIncrease specific volumeElectrolytic capacitorsRadial growthElectrolytic capacitor
The invention relates to an aluminum foil corrosion electrolytic cell, an anode corrosion foil manufacturing method and a device. According to the anode corrosion foil manufacturing method, aluminum foil which has been subjected to high-temperature vacuum annealing is adopted as raw materials; a primary electrolysis-secondary electrolysis-tertiary electrolysis method is adopted; according to the first half V of the primary electrolysis, direct current corrosion is adopted between pole plates, especially, at the second half V of the primary electrolysis, a cooling device is adopted to create a low-temperature environment. The aluminum foil corrosion electrolytic cell comprises an electrolytic cell body and two electrode plates which are located in the electrolytic cell body and are arranged in parallel; the aluminum foil corrosion electrolytic cell further comprises a cooling device; the cooling device is located at the outer sides of the electrode plates and comprises two cooling plates; the two cooling plates and an electrolytic plate are arranged in parallel; and the two cooling plates form an elongated aluminum foil channel. With the aluminum foil corrosion electrolytic cell and the anode corrosion foil manufacturing method adopted, technical problems of low electrostatic capacity or deteriorated bending strength which are caused by the inconformity of lengths of channel holes in aluminum foil radial growth can be solved, and laboratory-to-production transformation can be benefitted. The anode corrosion foil manufacturing method is used for manufacturing medium-and-high voltage anode corrosion foil.
Owner:RUYUAN DONGYANGGUANG MACHINERY CO LTD
Electric vehicle high-voltage insulation monitoring and protecting system and application method thereof
The invention discloses an electric vehicle high-voltage insulation monitoring and protecting system, comprising a high-voltage monitoring circuit, a controller and a power supply module, wherein the high-voltage monitoring circuit includes a waveform generator, a capacitor, a resistor and an insulation resistor positioned between the cathode of a high-voltage battery and a vehicle floor; the controller comprises an AC / DC (Alternating Current / Direct Current) converter, a comparator, a signal processing module and a logic judgment processing module; the power supply module is a power supply with adjustable output voltage; when in use, waveform signals are continuously generated by the waveform generator, the AC / DC converter monitors voltages at two ends of the resistor in real time so as to reflect the change of the resistor, and then a monitoring result is sequentially processed by the comparator, signal processing module and logic judgment processing module to obtain the real-time status of the insulation resistor so as to control insulation. The design not only has a simple monitoring program, an insulation monitoring reminding function and strong adjustable capacity, but also has high accuracy and security and wide application range.
Owner:DONGFENG COMML VEHICLE CO LTD
Intelligent amblyopic treatment instrument and control method thereof
ActiveCN103479471ACorrect sitting postureEasy to operateEye exercisersEye treatmentLoudspeakerDistance sensors
The invention discloses an intelligent amblyopic treatment instrument which comprises a shell and a control circuit system. The upper surface of the shell comprises a man-machine interaction interface and a work interface, and the included angle formed between the work interface and a horizontal bottom surface ranges from 10 degrees to 15 degrees. The control circuit system comprises a control module, a distance sensor and a loudspeaker, the central line of an emitting included angle of the distance sensor is perpendicular to the work interface, the distance sensor is connected with the control module through a data comparison unit, and the control module is connected with the loudspeaker through a voice unit. A control method of the intelligent amblyopic treatment instrument includes the steps: a, initializing electrification; b, selecting functions and transmitting corresponding signals to a buzzer, a liquid crystal driving unit, a motor servo unit and a backlight source driving unit by a single chip microcomputer, or transmitting a starting work instruction to a sight enhancing mirror or a light brush; c, synchronously playing voice prompt and monitoring a sitting posture in visual stimulation therapy; d, giving a stop command after timing or inputting stop signals; e, repeating the steps b, c and d; f, powering off the instrument.
Owner:XIAN HUAYA ELECTRONICS
Differential driving circuit and driving system for powering a light source
InactiveCN102522066AReduce the rated voltageLow costStatic indicating devicesElectroluminescent light sourcesLight sourceEnergy storage
The invention discloses a differential driving circuit for powering a light source and a driving system. The differential driving circuit includes a first set of switches and a second set of switches. A first current from a power source flows through the first set of switches to charge a first energy storage element when the first set of switches are turned on. A second current from the first energy storage element flows through the second set of switches to power the light source when the second set of switches are turned on. The differential driving circuit further includes a second energy storage element coupled to the light source in parallel and for providing a differential voltage to the light source. The invention also discloses a driving system for powering a light source, comprising a first switch, a second switch, a third switch and a fourth switch. A first signal controls conducting states of the first switch and the second switch; a second signal controls conducting statesof a third switch and a fourth switch so as to adjust powering to the light source. The nominal voltage of the differential driving circuit is reduced and switch costs are reduced.
Owner:AOTU ELECTRONICS WUHAN
Voltage control method and device, electronic equipment and readable storage medium
ActiveCN112114652AMeet power consumptionReduce power consumptionPower managementDigital data processing detailsNetwork connectionVoltage regulation
The invention discloses a voltage control method and device, is applied to electronic equipment, and belongs to the technical field of electronics. The electronic equipment comprises a power supply chip and a load chip, wherein an output end of the power supply chip is connected with a first pin of the load chip through a power supply network, the power supply network has first impedance, the first impedance is related to physical parameters of the power supply network in an initial state, and the method comprises the following steps of acquiring first impedance of the power supply network; based on the use duration of the electronic equipment, second impedance of a power supply network being obtained, and the second impedancebeing related to the aging degree of the power supply network; based on the actual working current, the first impedance and the second impedance of the power supply network, a first voltage and a second voltage of the power supply network being obtained, the firstvoltage being related to the first impedance, and the second voltage being related to the second impedance; obtaining a target voltage according to the first voltage, the second voltage and a third voltage required by the load chip; and adjusting the output voltage of the power supply chip to the target voltage.
Owner:VIVO MOBILE COMM CO LTD
Electromagnetic piezoelectric composite type vibration energy conversion circuit
InactiveCN104158254ASimple structureReduce volumeBatteries circuit arrangementsApparatus without intermediate ac conversionElectricityEngineering
The invention discloses an electromagnetic piezoelectric composite type vibration energy conversion circuit which comprises a piezoelectric energy collection rectification circuit (1), an electromagnetic energy collection rectification circuit (2), an energy storage circuit (3) and a voltage regulating circuit (4). The above four circuits are connected according to an electrical circuit mode to form the electromagnetic piezoelectric composite type vibration energy conversion circuit. The rectification circuits (1) (2) are used for converting alternating current outputted by electromagnetic and piezoelectric power generation bodies into direct current, two parts of electrical energy are stored in the energy storage circuit (3), and needed voltage is outputted after the conditioning voltage transformation of the voltage regulating circuit (4). According to the electromagnetic piezoelectric composite type vibration energy conversion circuit, the electromagnetic and piezoelectric energy collection modes are integrated, two types of energy are integrated to share the voltage regulating circuit, the complex degree of the circuit is low, the output power is greatly raised, and the efficiency of electrical energy conversion is improved.
Owner:HUAIYIN INSTITUTE OF TECHNOLOGY
Multifunctional comprehensive amblyopia therapeutic apparatus and control method thereof
ActiveCN103479472AAchieving therapeutic goalsTo achieve separate outputEye exercisersEye treatmentThree levelEngineering
The invention provides a multifunctional comprehensive amblyopia therapeutic apparatus and a control method thereof. The multifunctional comprehensive amblyopia therapeutic apparatus can perform comprehensive therapy including stereopsis and three-dimensional (3D) training on amblyopia, and is small in size, complete in functions and simple in operation. The multifunctional comprehensive amblyopia therapeutic apparatus comprises a casing, a liquid crystal display, a control circuit system and a pair of 3D chromatic aberration glasses or 3D stereoscopic glasses matched with the liquid crystal display. Electromechanical control of action of the exiting stimulation therapy method is converted into digital image control through the control circuit system and the liquid crystal display, patterns, rack screens, colors and brightness can be adjustable, and the therapeutic purpose can be achieved. By means of the 3D chromatic aberration glasses or 3D stereoscopic glasses matched with the liquid crystal display and synchronous control performed by a control system, images in the left eye and the right eye can be output respectively, three-level visual function training therapy including primary simultaneous vision, secondary fusion vision and tertiary stereoscopic functions can be achieved, and the functions of the existing amblyopia apparatus and a synoptophore can be completely replaced.
Owner:XIAN HUAYA ELECTRONICS
Handset power adapter
InactiveCN105262348AAvoid reverse breakdownMeet voltage requirementsBatteries circuit arrangementsAc-dc conversion without reversalEngineeringVoltage regulator
The invention provides a handset power adapter. The handset power adapter comprises a protection circuit, a rectification filter circuit, a voltage converting circuit, a first voltage-stabilizing circuit, an output filter circuit, and a charging management circuit, the protection circuit is connected with a power supply, an output terminal of the protection circuit is connected with the rectification filter circuit, an output terminal of the rectification filter circuit is connected with the voltage converting circuit, an output terminal of the voltage converting circuit is connected with the first voltage-stabilizing circuit, an output terminal of the first voltage-stabilizing circuit is connected with the output filter circuit, an output terminal of the output filter circuit is connected with the charging management circuit, the charging management circuit is connected with a storage battery, the output filter circuit and an output terminal of the storage battery are connected with a change-over switch, and an output terminal of the change-over switch is connected with a second voltage stabilizer and a third voltage stabilizer. According to the handset power adapter, the storage battery can be charged via the charging management circuit, and the usage is convenient.
Owner:JIANGSU FGY ENERGY STORAGE RES INST
Circuit structure and control method for realizing wide-gain FB-HB LLC resonant converter
PendingCN110165895AGuaranteed to workMeet needsEfficient power electronics conversionDc-dc conversionResonant converterEngineering
The invention discloses a circuit structure for realizing a wide-gain FB-HB LLC resonant converter and a control method. The whole resonant converter topological structure is divided into three parts:the first part is a switch network module, the second part is a resonant network module, and the third part is a rectifying and filtering network module. Under the condition that a power supply end of the resonant converter is not turned off, the duty ratio of the power switch tube is controlled through a digital control module to realize dynamic conversion; and in order to achieve a wider outputvoltage range, a method for adding a winding to a secondary side is used for obtaining a proper output voltage by controlling a power switch tube at the secondary side of the resonant converter.
Owner:GUANGDONG UNIV OF TECH
Island microgrid voltage frequency control method based on model predictive control
PendingCN110021960AFrequency stabilityPrevent model mismatchSingle network parallel feeding arrangementsEnergy storageIslandingPower grid
The invention provides an island microgrid voltage frequency control method based on model predictive control. The microgrid comprises a photovoltaic power generation unit, an energy storage unit, a power converter unit and a load. A control system comprises a model predictive control system, a storage battery power control system, a photovoltaic cell MPPT tracking system and an inverter controller. The model predictive control method comprises three parts of model prediction, rolling optimization and feedback correction, wherein a filter voltage current state equation and load current prediction under a dq0 coordinate are adopted for model prediction; an optimized objective function considers the microgrid frequency and voltage under the island operation mode; the optimal control variablewhich meets the minimum deviation of the voltage frequency of the grid side in the prediction step size is found out through rolling optimization; and the feedback correction is used for correcting the prediction model by sampling the power grid state of the current moment, so as to prevent the control deviation caused by model mismatching and environmental disturbance.
Owner:SOUTH CHINA UNIV OF TECH
Power converting and filtering device for spaceborne wireless transceiver
ActiveCN108768166AReduce typesReduce power lossEmergency protective circuit arrangementsDc-dc conversionLow noiseWireless transceiver
The invention discloses a power converting and filtering device for a spaceborne wireless transceiver. The power converting and filtering device comprises a primary power protection module, a primarypower filtering module, a secondary power conversion module, a secondary power filtering module and a tertiary power conversion module which are connected in sequence, wherein a primary power supply sequentially passes through the primary power protection module and the primary power filtering module, generates s paths of secondary power voltage through the secondary power conversion module; the spaths of secondary power voltage enter the secondary power filtering module; the secondary power filtering module outputs n paths of low-noise secondary power voltage and m paths of common secondarypower voltage, wherein p paths of low-noise secondary power supplies and q paths of common secondary power supplies enter the tertiary power conversion module, and p paths of low-noise tertiary powersupplies and q paths of common tertiary power supplies are output; the low-noise secondary power supplies and the low-noise tertiary power supplies are used as the power supplies provided for a low-noise circuit or a linear circuit; and the common secondary power supplies and the common tertiary power supplies are used as the power supplies provided for the circuit which is insensitive to power supply noise.
Owner:SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
Preparation method of conductive polymer lithium ion energy accumulator
ActiveCN107256947AMeet the dual requirements of transmissionImprove conductivityFinal product manufactureCell electrodesConductive polymerSlurry
The invention discloses a preparation method of a conductive polymer lithium ion energy accumulator. The preparation method includes: adding a prepared polyoxometallic acid lithium salt solution into a conductive polymer monomer solution to obtain polyoxometallic acid lithium conductive polymer; adding the polyoxometallic acid lithium conductive polymer, polyvinylidene fluoride and conductive carbon black into an N-methyl pyrrolidinone solvent according to a certain proportion to prepare slurry, and coating aluminum foil and copper foil with the slurry to obtain the anode plate and the cathode plate of the energy accumulator; performing aluminum-plastic encapsulation on the prepared anode plate and cathode plate, and injecting electrolyte prepared in the step c to obtain the energy accumulator.
Owner:中国东方电气集团有限公司
Clamp voltage circuit
ActiveCN106919217AMeet voltage requirementsStable input voltage rangeElectric variable regulationLow voltageEngineering
The invention discloses a clamp voltage circuit comprising an input circuit which is used for providing input voltage for the clamp voltage circuit; a low voltage clamp circuit which is used for controlling that the output OUT of the input circuit is no less than a clamp low voltage value VL; a high voltage clamp circuit which is used for controlling that the output OUT of the input circuit is no more than a clamp high voltage value VH; a sink current source which is used for providing sink current bias for the clamp voltage circuit; and a sourcing current source which is used for providing sourcing current bias for the clamp voltage circuit. By means of the clamp voltage circuit of the invention, a clamp voltage circuit having stable input voltage range and can satisfy specific voltage requirement can be realized.
Owner:SHANGHAI HUALI MICROELECTRONICS CORP
Device for removing heavy metals and polycyclic aromatic hydrocarbons in bottom sediment of river channels and method thereof
ActiveCN104876409AGood controlAchieve reuseWater contaminantsBiological sludge treatmentHeavy metalsPollution
The invention relates to a device for removing heavy metals and polycyclic aromatic hydrocarbons in bottom sediment of river channels and a method thereof and belongs to the field of river-channel pollution treatment in environmental protection. The device comprises an electrolysis device, a biological fuel cell and a galvanometer, wherein the electrolysis device comprises a cathode area, a bottom-sediment area and an anode area; the negative electrode of the biological fuel cell is arranged at the outer side of a round drum, the positive electrode of the biological fuel cell is arranged at the inner side of the round drum, and a compost layer is arranged between the negative electrode and the positive electrode; a cathode rod is arranged in the cathode area, the top part of the cathode rod is electrically connected with the positive electrode, the negative electrode is connected with one end of the galvanometer, and the other end of the galvanometer is electrically connected with a positive rod; a substance exchange film is arranged between the anode area and the bottom-sediment area, a substance exchange film is also arranged between the bottom-sediment area and the cathode area, the top part of a cathode sampling area is provided with a cathode sampling port, the top part of a middle sampling area is provided with a middle sampling port, and the top part of an anode sampling area is provided with an anode sampling port. The device and the method have the advantages that the energy is saved and simultaneously the purpose of using wastes to treat wastes is achieved.
Owner:NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
Power adapter and AC/DC power supply driving tool
ActiveCN108233441AMeet voltage requirementsReduce use costBatteries circuit arrangementsElectric powerElectrical batteryComputer module
The invention relates to a power adapter and an AC / DC power supply driving tool. The power adapter comprises a DC power adapter suitable for being coupled to a DC power supply. The DC power adapter comprises a battery pack interface unit and an interface connection module group, wherein the battery pack interface unit comprises a plurality of battery pack interfaces, and the battery pack interfaces are suitable for accessing battery packs with corresponding voltage; and the interface connection module group comprises an input end, an output end and more than two interface connection modules coupled between the input end and the output end, the interface connection modules respectively correspond and are coupled to the battery pack interfaces, and the interface connection modules are coupled according to a preset connection mode. The application of the scheme can reduce the use cost and follow-up maintenance cost of the AC / DC power supply driving tool.
Owner:CHANGZHOU GLOBE CO LTD
Electric locomotive and traction circuit thereof
ActiveCN110949416AGuaranteed reliabilityMeet voltage requirementsAC motor controlElectric locomotivesElectric machineryTraction transformer
The invention discloses a traction circuit of an electric locomotive. The traction circuit comprises a traction transformer; first and second batteries; the storage battery charger charges the first storage battery and the second storage battery in a charging mode, and inverts the output current of the second storage battery into constant-voltage constant-frequency load power supply in a storage battery mode; when the first power supply circuit main body is in a contact network power supply mode, the electric energy of the contact network is converted to supply power to the first traction motor and the variable-voltage variable-frequency load; in the storage battery mode, the electric energy of the first storage battery is converted to supply power to the first traction motor and the variable-voltage variable-frequency load; when the second power supply circuit main body is in the contact network power supply mode, the electric energy of the contact network is converted to supply powerto the second traction motor and the constant-voltage constant-frequency load; and in the storage battery mode, the electric energy of the second storage battery is converted to supply power to the second traction motor. By applying the scheme, the cost is reduced, the reliability of the circuit is guaranteed, and the energy conversion utilization rate is increased. The invention further discloses an electric locomotive which has the corresponding effect.
Owner:ZHUZHOU ELECTRIC LOCOMOTIVE CO
An electric locomotive and its traction circuit
ActiveCN110949416BGuaranteed reliabilityMeet voltage requirementsAC motor controlElectric locomotivesConstant frequencyElectric machine
Owner:ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
Power supply circuit, inverter and photovoltaic power generation device
PendingCN114499160AMeet voltage requirementsApparatus without intermediate ac conversionDc-ac conversion without reversalLow voltageHemt circuits
The invention discloses a power supply circuit, an inverter and a photovoltaic power generation device. The power supply circuit comprises a power supply access end, a direct current conversion unit and a main control unit. The power supply input end is used for accessing an input power supply and outputting the power supply to a direct current bus, and the main control unit controls the direct current conversion unit to convert the power supply output by the bus and then output a supplementary power supply, so that the supplementary power supply and the voltage of the input power supply are superposed and then output to the direct current bus; and the requirement of a post-stage circuit on the direct-current bus voltage is met. According to the invention, the output power of the DC conversion unit, the loss of the DC conversion unit and the corresponding heat dissipation cost are reduced, and the efficiency of a system using the power supply circuit is improved; and the bus voltage can operate at low voltage, so that the device stress of the direct-current conversion unit is reduced.
Owner:SUNGROW POWER SUPPLY CO LTD
Overvoltage detection reminding system and method for vehicle-mounted loudspeaker
ActiveCN111629314AMeet voltage requirementsAvoid working with overpressureElectrical apparatusCurrent/voltage measurementOvervoltageAudio power amplifier
The invention relates to the technical field of vehicle-mounted loudspeaker detection circuits, in particular to an overvoltage detection reminding system and method for a vehicle-mounted loudspeaker.The system comprises a controller, and a power amplifier and a power supply module which are electrically connected with the output end of the controller. The other end of the power supply module isconnected to the power amplifier; the system also comprises a voltage detection module connected with the input end of the controller and the output end of the power amplifier; and the output end of the power amplifier is connected with a loudspeaker. The overvoltage detection reminding system mainly solves the problems that in an existing sound driving scheme of a vehicle-mounted liquid crystal instrument, the impedance of a voice coil can be influenced by the change of the use environment, the impedance is reduced, the output current is increased, and the service life of a lead of a loudspeaker is shortened due to fatigue wire breakage under long-time operation.
Owner:HUIZHOU DESAY SV AUTOMOTIVE
Protective circuit of low-voltage equipment continuously working on locomotive
InactiveCN105552829AAvoid feeding phenomenonMeet voltage requirementsArrangements responsive to undervoltageLow voltageComputer module
The invention provides a protective circuit of low-voltage equipment continuously working on a locomotive, wherein the protective circuit is applied to the low-voltage equipment continuously working on the locomotive. The protective circuit of the low-voltage equipment continuously working on the locomotive comprises a relay and a signal processing module; a first end of the relay is connected with a positive pole of an accumulator of the locomotive, a second end of the relay is connected with a negative pole of the accumulator of the locomotive, a third end of the relay is connected with a first input end of the low-voltage equipment continuously working on the locomotive and a first input end of the signal processing module, and a fourth end of the relay is connected with a second input end of the low-voltage equipment continuously working on the locomotive and a second input end of the signal processing module; a third input end of the signal processing module is connected with an output end of the low-voltage equipment continuously working on the locomotive; an output end of the signal processing module is connected with a fifth end of the relay. By means of the protective circuit, the feed phenomenon of the accumulator of the locomotive can be avoided, and operation safety of the locomotive is improved.
Owner:ZHUZHOU ELECTRIC LOCOMOTIVE CO
Test transformer
ActiveCN109637792AHigh working reliabilityNumber of turns adjustableVariable inductancesVariable transformersVoltage regulationAlternating current
The application relates to a test transformer, which comprises an iron core, a primary coil and a secondary coil. The primary coil and the secondary coil are arranged around the iron core. The numberof turns of the primary coil and / or the number of turns of the secondary coil are / is adjustable so that the turn ratio between the primary coil and the secondary coil can be changed. When an alternating current is applied to the primary coil of the test transformer, an alternating-current magnetic flux will be generated in the iron core to induce a voltage in the secondary coil. The number of turns of the primary coil and / or the number of turns of the secondary coil are / is adjustable. Specifically, the number of turns of the primary coil can be adjusted, the number of turns of the secondary coil can also be adjusted, and the number of turns of the primary coil and the number of turns of the secondary coil can be adjusted at the same time, so as to change the turn ratio between the primarycoil and the secondary coil and achieve the purpose of voltage regulation. Therefore, the voltage requirements for test of different test objects are met, and the working reliability of the test voltage is improved.
Owner:特变电工湖南电气有限公司
Multi-block hybrid vacuum circuit breaker having in series connected vacuum interrupters
ActiveCN104756215AMeet voltage requirementsEasy to implementHigh-tension/heavy-dress switchesAir-break switchesElectricityEngineering
The invention relates to a multi-block hybrid vacuum circuit breaker (1) comprising at least two blocks (2) with at least one semiconductor component and one vacuum interrupter (3) comprising a vacuum switching chamber (4) for accommodating a pair of electrical contacts comprising a fixed electrical contact (5) and a axial movable electrical contact (6), which can be moved in translation for switching purpose, wherein the at least one semiconductor component is connected in parallel to the vacuum interrupter (3).
Owner:ABB (SCHWEIZ) AG
Control device and control method of alternating current and direct current power supply system and alternating current and direct current power supply system
ActiveCN113098076AGuaranteed validityMeet voltage requirementsDc network circuit arrangementsElectric power transfer ac networkDisturbance voltageLoop control
The invention discloses a control device and a control method of an alternating current and direct current power supply system and the alternating current and direct current power supply system, the alternating current and direct current power supply system comprises a power transmission line, a sending end converter, a receiving end converter and a plurality of switches, and the control device comprises a sending end control unit and a receiving end control unit, the sending end control unit adopts double closed loop control of a dc voltage outer loop and a current inner loop and is used for controlling the direct-current side voltage of the transmitting-end converter to be constant, and meanwhile, neutral-point potential closed-loop control based on zero-sequence voltage injection is introduced to ensure neutral-point potential balance of the transmitting-end converter; and the receiving end control unit adopts double closed-loop PI control of a voltage outer loop and a current inner loop, is used for controlling alternating current voltage output of a receiving end converter, provides voltage support for a load, introduces current feedback and voltage feedforward, and is used for eliminating current coupling and load disturbance voltage influence. By means of the mode, the control device can improve the power supply reliability and effectiveness of the alternating-current and direct-current power supply system, and the voltage requirement of an end user is met.
Owner:GUANGDONG POWER GRID CO LTD +1
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