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Control system and control method of an in-vehicle solar energy charger
ActiveUS20120074892A1Maximum outputLarge outputCharging stationsSecondary cells charging/dischargingPower batteryElectricity
A control system for an in-vehicle solar energy charger, comprising a solar cell panel, a solar energy charger, a starting battery, a power battery and a controller. The solar energy charger, the starting battery and the power battery are electrically connected to the controller respectively. The controller is configured for performing a maximum photovoltaic power tracking algorithm and controlling an output power of the solar energy charger for charging the power battery or starting battery, according to an input power of the solar energy charger.
Owner:BYD CO LTD
Coordinated control method for active power of photovoltaic power station group
ActiveCN103545848ACoordinated control is simple and accurateAdjust infrequentlySingle network parallel feeding arrangementsPhotovoltaic energy generationPower gridPhotovoltaic power station
The invention provides a coordinated control method for active power of a photovoltaic power station group. The method includes the following steps: firstly, acquiring a maximum allowable photovoltaic power generation output value Pmax of a power network; secondly, acquiring planed total output amount Pn_plan of the photovoltaic power station group; thirdly, regulating a planned output value Pi_plan of each photovoltaic power station; fourthly, acquiring the planned output value Pi_plan of each photovoltaic power station. Compared with the prior art, the coordinated control method for the active power of the photovoltaic power station group has the advantages that on the premise that the power network operates safely and stably, output plan of each photovoltaic power station is optimally configured in consideration of a principle of equality according to actual resource situation of each power station, and accordingly photovoltaic power generation output is maximized.
Owner:STATE GRID CORP OF CHINA +2
Vehicle control system and vehicle control method
InactiveCN102667117AAcceleration meetsMaximum outputElectrical controlMachines/enginesControl systemVehicle control
A vehicle control system includes an acceleration generating device (engine, T / M) that generates an acceleration applied to a vehicle, and a vehicle control device that controls the acceleration generating device, based on an accelerator pedal stroke Pa representing an operation of an accelerator pedal by a driver, and a vehicle speed v of the vehicle. In the vehicle control system or method, the vehicle control device controls the acceleration generating device, based on a required acceleration Gx that is determined based on a relationship between the accelerator pedal stroke Pa and the required acceleration, including, as a condition, an acceleration corresponding to a given accelerator pedal stroke, which is specified by a relationship between the vehicle speed and the acceleration when the accelerator pedal stroke is held at the given value.
Owner:TOYOTA JIDOSHA KK
Method for improving overall efficiency of photovoltaic inverter system
InactiveCN102237690AImprove efficiencyMaximum outputEnergy industrySingle network parallel feeding arrangementsComputer scienceMaximum power point tracking
The invention relates to a method for improving the overall efficiency of a photovoltaic inverter system, belonging to the technical field of photovoltaic applications. The technical scheme is that the photovoltaic inverter system comprises more than two photovoltaic sub arrays and each sub array is configured with an inverter with an MPPT (maximum power point tracking) function, wherein the photovoltaic sub array is composed of battery boards in series-parallel connection, the number of the battery boards in series-parallel connection are matched with the input voltage and current of the inverter, and each battery board string is connected with a diode in series in order to ensure the interaction among the battery board group strings. The photovoltaic inverter system provided by the invention has the advantages of high overall generating efficiency, good reliability and more generation capacity in the whole life cycle.
Owner:BAODING TIANWEI GRP CO LTD
Optimal allocation method for positive and negative spinning reserve capacity in system comprising wind farm
ActiveCN104659818AMaximum outputSafe and stable power supplySingle network parallel feeding arrangementsWind energy generationAutomotive engineeringElectricity
The invention discloses an optimal allocation method for positive and negative spinning reserve capacity among thermal power units in a system comprising a wind farm. According to the method, a spinning reserve capacity benefit model is constructed by taking the running economy and reliability of the system into account, namely, the cost of positive spinning reserve capacity, power generation benefits of negative spinning reserve capacity, obvious reduction of the situation that electric quantity is lower than an expected value after the spinning reserve capacity configuration of the system, an equivalent power function is used for describing the output of the thermal power units and wind turbine generators, and the allocation of the spinning reserve capacity among the thermal power units which are put into operation is optimized by virtue of a probabilistic production simulation calculation method. The method has certain reasonability, and a feasible reference is provided for the large-scale reliable grid-connected running of the wind turbine generators.
Owner:STATE GRID CORP OF CHINA +3
Reactive power voltage coordination control method adaptable to clustered wind-solar-electricity access system
ActiveCN106451477AMaximum outputOvercoming complex reactive voltage problems is outstandingSingle network parallel feeding arrangementsAc network voltage adjustmentControl layerControl objective
The invention discloses a reactive power voltage coordination control method adaptable to a clustered wind-solar-electricity access system. A power grid serves as the highest level control layer, a power grid level control station selects a reactive power optimization mode or voltage control mode according to weak sending end voltage, a cluster level serves as a second highest level control layer, corresponding model calculation is performed according to a superior control command, a control objective is proposed to an inferior station, a terminal serves as a control layer and also an executive layer, local control is performed and action of an inferior wind generation set or a photovoltaic module is selected according to the control objective proposed by a superior station, the wind generation set / photovoltaic module is an executive layer, and reactive power adjusting action is executed according to the superior control command. The outstanding problem of complicated reactive power voltage of the clustered wind-solar-electricity access system in the prior art is solved, full-network voltage safe and stable operation is realized, and wind-solar-electricity capacity is maximized as much as possible.
Owner:ECONOMIC RES INST OF STATE GRID GANSU ELECTRIC POWER +2
Wind farm operation control device and method
InactiveCN104283225AMaximum outputReduce the risk of output exceeding the rated rangeSingle network parallel feeding arrangementsEnergy storageElectricityStandby power
The invention provides a wind farm operation control device which can maximize the output of a wind farm and can reduce losses caused by power limitation and wind curtailment. The wind farm operation control device comprises a data collecting unit, an energy storage system safety allowance calculating unit and a power generating model setting unit. The data collecting unit collects wind power generating historical data in a wind power generating system and energy storage information of an energy storage system, and the energy storage system is the standby power capacity of the wind power generating system and is used for compensating for wind power prediction errors. The energy storage system safety allowance calculating unit is used for calculating the needed energy storage capacity of the energy storage system when the energy storage system compensates for the wind power prediction errors through the collected wind power generating historical data and the collected energy storage information, and the energy storage capacity serves as the safety allowance. The power generating model setting unit is used for establishing a wind power generating prediction model according to the wind power generating historical data, and the difference between the current capacity of the energy storage system and the safety allowance is regarded as part of the output of the wind power generating system in a specified cycle to adjust the wind power generating prediction model.
Owner:HITACHI LTD
Control system and control method of an in-vehicle solar energy charger
ActiveUS8853993B2Maximum outputCharging stationsSecondary cells charging/dischargingElectricityPower battery
A control system for an in-vehicle solar energy charger, comprising a solar cell panel, a solar energy charger, a starting battery, a power battery and a controller. The solar energy charger, the starting battery and the power battery are electrically connected to the controller respectively. The controller is configured for performing a maximum photovoltaic power tracking algorithm and controlling an output power of the solar energy charger for charging the power battery or starting battery, according to an input power of the solar energy charger.
Owner:BYD CO LTD
Electret based mems electric field energy harvester
ActiveCN104022688BStable jobStable alternating electric fieldPiezoelectric/electrostriction/magnetostriction machinesElectricityEnergy harvester
The invention belongs to the technical field of energy collection, in particular to an MEMS electric field energy collector based on an electret. The MEMS electric field energy collector based on the electret is mainly used for collecting energy of an alternating-current electric field in a space. The MEMS electric field energy collector based on the electret comprises an insulating substrate, a piezoelectric wire, a supporting surface and the electret, wherein the piezoelectric wire is arranged above the insulating substrate in parallel, an electrostatic field composed of the electret adhering to the supporting surface provides appropriate bias for the piezoelectric wire located in the electrostatic field, sensitivity of the piezoelectric wire biased by the electrostatic field to an external electric field is greatly improved, when the piezoelectric wire vibrates due to excitation of the external electric field, a piezoelectric material carries out stress-strain due to stretching or shrinkage so that internal electric charges flow to form electrical signals, and mechanical energy can be converted into electric energy; electric field energy is collected through an external circuit connected with the piezoelectric wire. The MEMS electric field energy collector based on the electret is manufactured through the MEMS micromachining technology, electric field energy in a space is used creatively, and the collector is small in size, convenient to carry and low in cost.
Owner:TSINGHUA UNIV
Superposed battery structure of perovskite and N-type silicon-based back contact battery
PendingCN110600500AAchieve outputImprove photoelectric conversion efficiencyFinal product manufactureSolid-state devicesN type siliconPhotoelectric conversion efficiency
The invention discloses a superposed battery structure of perovskite and N-type silicon-based back contact battery. The superposed battery structure is characterized by comprising: a perovskite material absorption layer, a front face transparent conducting film deposition layer, a front face passivation layer, a front surface field, an N-type monocrystalline silicon piece substrate and a back facepassivation layer, wherein a back surface P + doped layer and a back face N + doped layer, which are independent from each other are arranged between the N-type monocrystalline silicon piece substrate and the back face passivation layer, and two metal electrodes are respectively connected with the back surface P + doped layer and the back face N + doped layer and are exposed from the surface of the back face passivation layer. According to the stacked battery structure disclosed by the invention, the preparation of a perovskite material superimposed with an interdigitated PN junction on the back face of the back contact battery is realized by using silk-screen printing nanometer phosphor slurry or nanometer boron slurry superposed with laser propulsion, the maximum output of the internalcurrent of the laminated battery is realized, and the photoelectric conversion efficiency of a back contact solar battery is further improved.
Owner:QINGHAI HUANGHE HYDROPOWER DEV
MEMS electric field energy collector based on electret
ActiveCN104022688AStable jobStable alternating electric fieldPiezoelectric/electrostriction/magnetostriction machinesEnergy harvesterMechanical energy
Owner:TSINGHUA UNIV
Integrated Control Method of Passive Filtering and Reactive Power Compensation
ActiveCN101741088BMaximum outputMaximum power outputReactive power adjustment/elimination/compensationReactive power compensationPower compensationElectric power system
The invention relates to a method for the comprehensive control of passive filter and reactive power compensation, which comprises: firstly, judging locking conditions including total distortion and default phase of a harmonic current and voltage threshold crossing, and locking a feed outlet and switching to a protective flow when any condition is met; and when no locking condition is met, entering a control policy selection flow, wherein the policy selection is performed mainly for judging if a potential maximum subharmonic exceeds a standard, switching is performed according to a reactive power compensation policy if the potential maximum subharmonic does not exceed the standard, and control is performed according to a filter wave if the potential maximum subharmonic exceeds the standard. In the invention, through the dual control of the reactive power compensation and the filter, a power system can output at a maximum power and the production benefits are increased; and a locking protection function is provided, so the safe and reliable operation of the system are further ensured.
Owner:SUZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER +1
A power supply control device and a packed cell
ActiveCN104752640AAvoid damageEasy to operateCell component detailsSecondary cells servicing/maintenanceEngineeringElectric power
A power supply control device and a packed cell are provided. Load to the packed cell is properly controlled when cell units break down. The packed cell (10030) comprises a plurality of cell units (Cn) in series connection; and a plurality of rectifying elements (Dn) that are connected in parallel to the cell units (Cn). When breakdown of any cell unit (Cn) is detected, the maximum output power of the packed cell (10030) is determined based on the maximum allowable current of the rectifying elements (Dn), and output of devices receiving electric supply from the packed cell (10030) and running is controlled. The maximum output power is determined as the product of the maximum allowable current of the rectifying elements (Dn) and output voltage of the packed cell (10030) except the breakdown cell unit (Cn).
Owner:MITSUBISHI MOTORS CORP
Sliding arc discharge plasma generation system
InactiveCN114599143AMaximum outputPromote conversionEnergy inputPlasma techniqueMechanical engineeringPlasma energy
The invention discloses a gliding arc discharge plasma generation system, belongs to the technical field of plasma energy conversion, and can solve the problems of low plasma power supply efficiency and poor H2 and CO selectivity in the existing system. The system comprises a discharge device which comprises an insulating base, a cover body arranged on the insulating base, and two blade-shaped electrodes arranged in the cover body; the two blade-shaped electrodes are both provided with arc-shaped edges, and the arc-shaped edges of the two blade-shaped electrodes are oppositely arranged; the gas distribution device is used for conveying mixed gas of air and fuel gas to an area between the two blade-shaped electrodes by penetrating through the insulating base; the constant-current alternating-current power supply is used for supplying power to the two blade-shaped electrodes, so that sliding arc plasmas are generated in the cover body; the discharge frequency of the constant-current alternating-current power supply is adjustable; and the electrical characteristic detection device is used for detecting the discharge current and the discharge voltage of the discharge device. The method is used for plasma hydrogen production.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Water supply and water control integrated disc granulator
ActiveCN104959072BSolve problems that cannot be integratedRealize integrationGranulation in rotating dishes/pansCircular discThermal spraying
The invention discloses a water supply and control integrated disc granulator, which comprises a support frame, wherein a granulating cylinder is arranged on the support rack, an atomized water supply device matched with the granulating cylinder is arranged on the support rack; in the atomized water supply device, a water pump, a turbo type pressurizing device, a pressure adjusting device and a high-pressure atomizing nozzle are communicated through water supply pipelines; and the high-pressure atomizing nozzle is arranged at the upper part of the granulating cylinder and is matched with the granulating cylinder. According to the water supply and control integrated disc granulator, the problem that the granulating and water spraying of a fertilizer cannot be integrated is solved; the processes of granulating and water spraying are integrated; and dust is proofed, the loss of raw materials is reduced and the environment is effectively protected.
Owner:大蜂产(宜昌)生物科技有限公司
Fault isolation & restoring procedures for electrohydraulic valves
ActiveCN104870836AHigh outputMaximum outputFluid-pressure actuator testingServometer circuitsFuel tankElectro hydraulic
A method for isolating a fault or blocked work port in an electro-hydraulic system is disclosed. In one step, a system pump is set to a first predetermined pressure and a valve assembly is commanded to a center position. In another step, the center position of the valve is recorded. In one step, the valve assembly is opened to place a work port associated with the valve in fluid communication with the pump, after which a first end position of the valve, a first work port pressure, and a first pump supply pressure are recorded. In another step, the valve assembly is opened to place the work port to a tank reservoir, after which a second end position of the valve and a fluid pressure associated with the work port are recorded. The recorded and measured data can then be analyzed to identify the fault condition or blocked work port.
Owner:DANFOSS POWER SOLUTIONS II TECH AS
Light corrugated pipe type thermal expansion driving device
PendingCN110608144ANovel structureWorking principle is clearOperating means/releasing devices for valvesMachines/enginesTemperature controlThermal energy
The invention discloses a light corrugated pipe type thermal expansion driving device, and belongs to the field of thermal expansion braking. The driving device is composed of a corrugated pipe body,a top cover, a sealing gasket and a thermal expansion medium. The device has the advantages of being novel structure and clear in working principle; a corrugated pipe body in the device can be used asa temperature sensing body filled with the thermal expansion medium, but also as an elastic element to directly sense the volume change of the thermal expansion medium so that displacement output canbe directly converted; and meanwhile contracting and stretching of the corrugated pipe can be realized by means of thermal expansion and contraction properties of the thermal expansion medium so as to drive a push rod in a temperature control valve to realize the backward and forward displacement, so that the conversion of thermal energy and mechanical energy is realized, and the output of the maximum displacement can be realized as well.
Owner:YANGZHOU UNIV
Round rod polishing device
InactiveCN112428032AImprove roundnessImprove performanceRevolution surface grinding machinesGrinding drivesPolishingEngineering
The invention discloses a round rod polishing device. The polishing device comprises a workbench (1); a round pipe fixing device (2) is arranged on the workbench (1); an arc-shaped moving device (3) is arranged on the workbench (1) and is arranged above the round pipe fixing device (2); a polishing device (4) is arranged on the arc-shaped moving device (3); the arc-shaped moving device (3) comprises bases (301) fixed to the two sides of the upper surface of the workbench (1); fixing lugs (302) are arranged on the bases (301); an arc-shaped rail (303) is arranged between the fixing lugs (302) on the two sides; an electric push rod (304) is arranged on the bases (301); rod connecting lugs (305) are arranged on the sides of the arc-shaped rail (303); and the extending ends of the electric push rod (304) are connected with the rod connecting lugs (305). The round rod polishing device can effectively polish the round rods, and is high in polishing quality and relatively high in polishing speed.
Owner:INST OF LASER & OPTOELECTRONICS INTELLIGENT MFG WENZHOU UNIV
Screw type pipe pushing and bending machine
The invention provides a crew type pipe pushing and bending machine, belongs to the technical field of press machines, and in particular relates to a pipe pushing type pipe bending machine in which a motor drives a screw (trapezoidal screw thread pair) to make a pressure plate of a press and a mould vertically move and the motor drives a lateral screw (trapezoidal screw thread pair) to push rods. The mould is provided with a plurality of guide posts; the lower end of each guide post is provided with a square hole with a bevel; a plurality of groups of mould taper keys position and lock the mould; and after the mould is reliably pressed and locked, a pipe blank is put into the mould, a quick oil cylinder drives a handpiece to horizontally and quickly move to a front position, two symmetrical taper keys lock the handpiece, a horizontal torque motor and a underdriving gear set drive an integral gear screw nut to make the horizontal screw move horizontally, and the front end part of the horizontal screw pushes the pipe blank. The screw type pipe pushing and bending machine is suitable for pushing and bending pipes of which the outer diameter phi is between 300 and 800mm and the maximum wall thickness is 25mm, and the aims of concise and compact structure, low cost, electric energy conservation, and stable and reliable operation are achieved.
Owner:TIANJIN DEAOSHI TECH DEV
Water supply and control integrated disc granulator
ActiveCN104959072ADust-proof raw material lossReduce raw material lossGranulation in rotating dishes/pansFertilizerEngineering
The invention discloses a water supply and control integrated disc granulator, which comprises a support frame, wherein a granulating cylinder is arranged on the support rack, an atomized water supply device matched with the granulating cylinder is arranged on the support rack; in the atomized water supply device, a water pump, a turbo type pressurizing device, a pressure adjusting device and a high-pressure atomizing nozzle are communicated through water supply pipelines; and the high-pressure atomizing nozzle is arranged at the upper part of the granulating cylinder and is matched with the granulating cylinder. According to the water supply and control integrated disc granulator, the problem that the granulating and water spraying of a fertilizer cannot be integrated is solved; the processes of granulating and water spraying are integrated; and dust is proofed, the loss of raw materials is reduced and the environment is effectively protected.
Owner:大蜂产(宜昌)生物科技有限公司
Coordinated control method for active power of photovoltaic power plant group
ActiveCN103545848BCoordinated control is simple and accurateAdjust infrequentlySingle network parallel feeding arrangementsPhotovoltaic energy generationPower gridPhotovoltaic power station
The invention provides a coordinated control method for active power of a photovoltaic power station group. The method includes the following steps: firstly, acquiring a maximum allowable photovoltaic power generation output value Pmax of a power network; secondly, acquiring planed total output amount Pn_plan of the photovoltaic power station group; thirdly, regulating a planned output value Pi_plan of each photovoltaic power station; fourthly, acquiring the planned output value Pi_plan of each photovoltaic power station. Compared with the prior art, the coordinated control method for the active power of the photovoltaic power station group has the advantages that on the premise that the power network operates safely and stably, output plan of each photovoltaic power station is optimally configured in consideration of a principle of equality according to actual resource situation of each power station, and accordingly photovoltaic power generation output is maximized.
Owner:STATE GRID CORP OF CHINA +2
A kind of wind power active power control distribution method and system
ActiveCN104333049BMaximum outputImprove wind power capacitySingle network parallel feeding arrangementsWind energy generationElectricityDistribution method
The invention relates to a wind electricity active power control distribution method and system. The method includes the steps: acquiring wind electricity active power total adjustment amount; reading basic information needed by calculating comprehensive scores of wind electricity plants when the update period of the comprehensive scores of the wind electricity plants is achieved, calculating a comprehensive score of each wind electricity plant, and generating or updating a power reduction wind electricity plant queue and a power rising wind electricity plant queue according to the comprehensive score of each wind electricity plant; sequentially performing power reduction distribution for the wind electricity plants in the power reduction queue or power rising distribution for the wind electricity plants in the power rising queue according to the wind electricity active power adjusting direction. Real-time running data of the wind electricity plants are combined, scoring and sequencing are performed based on performance indicators of the grid-connected technology of the wind electricity plants, wind electricity fluctuation can be timely restrained, three dispatching principles are embodied, calculation and power distribution of maximum force output can be adjusted by the wind electricity plants in real time when power rises, top spin of the wind electricity plants is considered, wind electricity force output is maximized, and the wind electricity admitting capacity of a grid is improved.
Owner:INNER MONGOLIA POWER GRP +1
Fault Isolation and Recovery Procedures for Electrohydraulic Valves
ActiveCN104870836BHigh outputMaximum outputFluid-pressure actuator testingServometer circuitsElectro hydraulicFuel tank
A method for isolating faulty or blocked work ports in an electrohydraulic system is disclosed. In one step, the system pump is set to a first predetermined pressure and the valve assembly is commanded to a center position. In another step, the central position of the valve is recorded. In one step, the valve assembly is opened to place a work port associated with the valve in fluid communication with the pump, after which a first end position of the valve, a first work port pressure and a first pump supply are recorded pressure. In another step, the valve assembly is opened to place the working port into a reservoir, after which the second end position of the valve and the fluid pressure associated with the working port are recorded. The recorded and measured data can then be analyzed to identify fault conditions or blocked working ports.
Owner:DANFOSS AS
An all-fiber ld-pumped multimode fiber cascaded Raman random laser
ActiveCN108695680BImprove efficiencyPlay the role of beam quality purificationLaser using scattering effectsActive medium shape and constructionRandom laserFiber
The invention discloses an all-fiber LD-pumped multi-mode optical fiber cascaded Raman random laser, comprising: an LD pumping laser source group, the output end of the LD pumping laser source group is connected to a multi-mode optical fiber combiner, and multiple The output end of the mode fiber combiner is connected to a mode field adapter, the output end of the mode field adapter is connected to a fiber grating string, the output end of the fiber grating string is connected to a multimode fiber, and the input and output fibers of the multimode fiber combiner have the same core diameter and The fiber type at the input end is the same as the output fiber type of the LD pump laser source, the fiber type at the input end of the mode field adapter is the same as that at the output end of the multimode fiber combiner, and the fiber type at the output end of the mode field adapter and the fiber grating string are the same as those of the multimode fiber same type. Using a specific matching multimode fiber combiner and a matching mode field adapter, the matching fiber grating series can be cascaded to obtain a cascaded Raman random laser with high beam quality and high power.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Turbo pressurization unit for disc granulator
ActiveCN104959073BReduce lossRealize integrationGranulation in rotating dishes/pansTurbineRaw material
The invention discloses a turbo type pressurizing device of a disc granulator. An inner cylinder is arranged in a shell; the upper part of one side of the inner cylinder is communicated with a water inlet pipe; the bottom of the other side of the inner cylinder is communicated with a water outlet pipe; a motor is arranged below the inner cylinder; the rotating shaft of the motor is connected with a turbine rotating shaft; a first turbine, a first rotating turbine, a second turbine and a second rotating turbine are arranged on the turbine rotating shaft from bottom to top; the first and second turbines are fixedly connected with the turbine rotating shaft; and the first and second rotating turbines sleeve the outside of the turbine rotating shaft through a rotating sleeve and are not connected with the turbine rotating shaft. After the turbo type pressurizing device is arranged at the disc granulator, the problem of water pressurizing during fertilizer granulation can be solved; the processes of granulating and water supply and spraying are integrated; and the dust is proofed, the loss of raw materials is reduced and the environment is effectively protected.
Owner:CHINA THREE GORGES UNIV +2
Urban street damaged asphalt road pavement refurbishment machine
PendingCN114086453AMaximum storageMaximum outputRoads maintainenceDust controlStructural engineering
The invention relates to an urban street damaged asphalt road pavement refurbishment machine which comprises a machine frame, a dust suction device arranged on the machine frame, a cleaning device arranged on the machine frame and a heating material conveying device arranged on the machine frame, and the dust suction device, the cleaning device and the heating material conveying device are sequentially distributed from front to back according to the movement direction of the machine frame. The dust suction device, the cleaning device and the heating material conveying device are sequentially distributed from front to back according to the movement direction of the machine frame so that a damaged asphalt pavement can be dedusted firstly, then cleaned and finally added with asphalt, and the influence of dust on pavement rebuilding can be prevented.
Owner:石家庄市公路桥梁建设集团有限公司
Magnetic coupling underwater propeller based on magnetic moment angle control and control method
InactiveCN112660349AIncrease speedImprove transmission efficiencyPropulsion power plantsPropulsive elementsMaximum torqueCoupling
The invention provides a magnetic coupling underwater propeller based on magnetic moment angle control and a control method. The problem that an existing underwater propeller is low in transmission efficiency is solved. The control method comprises the following steps: 1) measuring a flux density value of a magnetic coupling transmission unit in a current control period, and obtaining a current magnetic torque angle of the magnetic coupling transmission unit according to a corresponding relation between the flux density value of the magnetic coupling transmission unit and the magnetic torque angle; and 2) comparing the current magnetic moment angle obtained in the step 1) with the optimal magnetic moment angle, and adjusting the PWM duty ratio change rate of the propulsion motor, so that the rotating speed of the propulsion motor reaches the target rotating speed, and the magnetic coupling transmission unit is ensured to maintain the maximum torque output state.
Owner:西安精密机械研究所
A sun-tracking solar quadrotor aircraft
ActiveCN104267737BSolve the fatal flaw of short blanking timeRealize one-time rotationPosition/course control in three dimensionsElectric machineryMaximum power principle
The invention provides a design scheme of a sun-tracking solar quadrotor aircraft. The design scheme applies a sun-tracking mechanism and a solar cell module capable of two-axis rotation to a traditional quadrotor aircraft. Using the tracking sensor and the real-time adjustment of the motor, the solar cell module can supply energy for a long time and output solar energy to the maximum extent. This solution can solve the fatal flaw of the traditional quadrotor aircraft, which is short in the air, so that the application advantages of the quadrotor aircraft can be fully utilized. At the same time, the use of two-axis motors can realize the solar cell module to rotate to the best position at one time, thereby saving the energy of the quadrotor aircraft system. The application of the maximum power tracker can make the solar cell module always work at the maximum power point, and then the maximum Maximize the use of solar energy.
Owner:BEIHANG UNIV
Turbo type pressurizing device of disc granulator
ActiveCN104959073AReduce lossSolve the granulation processGranulation in rotating dishes/pansTurbineRaw material
The invention discloses a turbo type pressurizing device of a disc granulator. An inner cylinder is arranged in a shell; the upper part of one side of the inner cylinder is communicated with a water inlet pipe; the bottom of the other side of the inner cylinder is communicated with a water outlet pipe; a motor is arranged below the inner cylinder; the rotating shaft of the motor is connected with a turbine rotating shaft; a first turbine, a first rotating turbine, a second turbine and a second rotating turbine are arranged on the turbine rotating shaft from bottom to top; the first and second turbines are fixedly connected with the turbine rotating shaft; and the first and second rotating turbines sleeve the outside of the turbine rotating shaft through a rotating sleeve and are not connected with the turbine rotating shaft. After the turbo type pressurizing device is arranged at the disc granulator, the problem of water pressurizing during fertilizer granulation can be solved; the processes of granulating and water supply and spraying are integrated; and the dust is proofed, the loss of raw materials is reduced and the environment is effectively protected.
Owner:CHINA THREE GORGES UNIV +2
Reactive power and voltage coordination control method adapted to cluster wind and photovoltaic access system
ActiveCN106451477BMaximum outputOvercoming complex reactive voltage problems is outstandingSingle network parallel feeding arrangementsAc network voltage adjustmentControl objectiveTerminal voltage
The invention discloses a reactive power voltage coordination control method adaptable to a clustered wind-solar-electricity access system. A power grid serves as the highest level control layer, a power grid level control station selects a reactive power optimization mode or voltage control mode according to weak sending end voltage, a cluster level serves as a second highest level control layer, corresponding model calculation is performed according to a superior control command, a control objective is proposed to an inferior station, a terminal serves as a control layer and also an executive layer, local control is performed and action of an inferior wind generation set or a photovoltaic module is selected according to the control objective proposed by a superior station, the wind generation set / photovoltaic module is an executive layer, and reactive power adjusting action is executed according to the superior control command. The outstanding problem of complicated reactive power voltage of the clustered wind-solar-electricity access system in the prior art is solved, full-network voltage safe and stable operation is realized, and wind-solar-electricity capacity is maximized as much as possible.
Owner:ECONOMIC RES INST OF STATE GRID GANSU ELECTRIC POWER +2
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