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42results about How to "Improve quick response" patented technology
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City cooperative processing and linkage command system and command hall
The invention provides a city cooperative processing and linkage command system and a command hall. According to the system and the command hall, based on deep digging of a service relation among departments, through technology such as big data intelligent analysis technology, dynamic risk early-warning technology, multi-source coordination optimization technology and video-voice integration technology, a whole city daily operation cooperative processing system and an emergency processing linkage command system are established. Functional modules such as an event module, a command module, a processing module, a feedback module, a supervising module, an analyzing module and an evaluating module are integrated. The city cooperative processing and linkage command system and the command hall realize the following advantages of integrated cross-department and cross-organization resource integration, flexibly making and adjusting a solution, participating department intelligent selection, integrally displaying event and condition information, realizing full-process tracking, command and decision in daily operation management and emergency processing, realizing early finding, quick reaction and best processing, improving processing efficiency and shortening processing time.
Owner:THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
Abnormal data analysis and fault positioning system of first-aid repair of power distribution network and method
ActiveCN106990328APrecise positioningAccurate receptionFault location by conductor typesElectricityMonitoring system
The invention discloses an abnormal data analysis and fault positioning system of first-aid repair of a power distribution network and a method. The system comprises a power distribution network first-aid repair command platform which is connected with an intelligent public transformation monitoring system, an intelligent comprehensive leakage protector power distribution automation system, a 95598 system, an onsite line patrol monitoring device and an electricity utilization information acquisition system. The power distribution network first-aid repair command platform is used for distributing unique ID numbers to the power distribution automation system, the 95598 system, the onsite line patrol monitoring device and the electricity utilization information acquisition system respectively. Attributes of fault positioning schemes are gathered according to the fault positioning schemes, and each ID number is bonded a matched fault positioning scheme in the corresponding fault positioning scheme. Information transmitted by the power distribution automation system, the 95598 system, the onsite line patrol monitoring device and the electricity utilization information acquisition system are received and associated with corresponding ID numbers for classified storage. Fault positioning is performed on the information with the same ID numbers and positioning results are output.
Owner:STATE GRID SHANDONG ELECTRIC POWER +2
Digital electrichydraulic control system for generating plant turboset
ActiveCN101307699AImprove quick responseSwitching speed fluctuation is smallMachines/enginesEngine componentsPower stationControl system
The invention relates to a digital electro-hydraulic control system used for a power station steam turbine set. The digital electro-hydraulic control system comprises a workstation, a control processor, an overspeed protective device, a valve actuating clamping piece, a servo valve, an oil servo-motor and a steam turbine which is provided with an intermediate-pressure cylinder provided with an intermediate pressure adjusting valve and a high pressure cylinder provided with a high pressure main throttle valve and a high pressure adjusting valve. The invention is characterized in that: the control processor also comprises a control unit which receives a signal from the overspeed protective device, calculates and processes the signal, and transmits the signal to the overspeed protective device to control the opening and closing of the intermediate pressure adjusting valve and the high pressure adjusting valve. The invention also discloses a method for controlling the intermediate pressure adjusting valve of the digital electro-hydraulic control system used for the power station steam turbine set. Because the technical proposal is adopted, the defects of the prior control system are completely overcomed, the control system is safe and reliable, the program control for rotating speed and load of the set can be more accurate, switching speed of a TV / GV causes small wave motion, and the characteristic of quick response of the set is also improved at the same time.
Owner:SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
Antenna plane near-field test scanner
InactiveCN103323685AImprove quick responseElectromagentic field characteristicsGear wheelClosed loop
An antenna plane near-field test scanner adopts a brand-new design and is composed of a direct drive motor (a linear motor for short) serving as a drive element and an industrial personal computer and a position measurer serving as control units, as well as a probe and a PC (personal computer) serving as data sampling units. In an antenna plane near-field test, in particular a millimeter wave antenna test, a space plane is scanned with high precision at a high speed and antenna near-field amplitude-phase data is sampled at the same time. The linear motor is used as the drive element for driving the scanner to move in X and Y directions, a screw rod, a gear wheel, a rack and a speed reducer are not used, a load is directly driven, and an error such as a back clearance is eliminated. The advantage of closed-loop control is brought into fully play, accurate and high-speed positioning is realized, and the needs of the millimeter wave antenna near-field test can be well met.
Owner:南京顺仕祥电子有限公司
Fast Switching Between Control Channels During Radio Resource Control Connection
ActiveUS20180220485A1Improve quick responseQuick switchNetwork traffic/resource managementConnection managementCommunications systemPhysical layer
This disclosure relates to techniques for fast switching between control channels during a radio resource control connection in a wireless communication system. A cellular base station and a wireless device may establish a radio resource control connection. The base station may provide a physical layer indication to the wireless device of a control channel to monitor for scheduling information. The base station may provide scheduling information to the wireless device on the indicated control channel. The wireless device may monitor the indicated control channel for scheduline information based at least in part on the physical layer indication and may receive the scheduling information provided by the base station on the indicated control channel.
Owner:APPLE INC
Electric steering engine design method adopting compound control of pure fuzzy and fuzzy PID
ActiveCN107132761AImprove performanceMaintain reliabilityControllers with particular characteristicsAdaptive controlCompound aFuzzy pid control
The invention discloses an electric steering engine design method adopting a compound control of pure fuzzy and fuzzy PID. The electric steering engine design method adopting compound control of pure fuzzy and fuzzy PID comprises steps of measuring an angle position signal of the steering engine to perform feedback, comparing the angle position signal with an input steering engine signal to form an error signal, designing a pure fuzzy control rule database through different magnitudes of errors to realize automatic tracking on basic input signals by the electric steering engine, forming an error differential term through an angular velocity signal measuring rotation of the steering engine calculating, generating an error differential integral term through calculation, constituting PID through the error, the error differential and error integration, designing a fuzzy regulation rule database of a PID control coefficient through the error and the error differential to realize fuzzy dynamic regulation of the control coefficient in the fuzzy PID control, and compounding a pure fuzzy control rule and the fuzzy PID control rule in order to improve the fastness of the electric steering engine and realize fast tracking of the input order of the steering engine. The beneficial effect of the electric steering engine design method is that the electric steering engine designed by the invention has a better fast response compared with a traditional electric steering engine.
Owner:YANTAI NANSHAN UNIV +1
Fuzzy prediction and compensation control method of tower top temperature for sintering flue gas desulfurization process
InactiveCN102269973AControl inhibitionSuppression temperatureAdaptive controlFuzzy predictionTime delays
The invention discloses a method for vaguely predicting, compensating and controlling tower top temperature during desulfurization of sintering flue gas. Aiming at the problem that the tower top temperature cannot be stably controlled due to the influence of system time delay and external disturbance during desulfurization of the sintering flue gas, the method comprises the following steps of: building a prediction model of the tower top temperature by using a heat transfer mechanism; designing a vague prediction and compensation controller of the tower top temperature by taking the difference between a prediction value and a set value as input; and compensating water injection quantity by using model rule. By the method, main disturbance in a system is introduced into the prediction model, and a compensation value is calculated according to the difference between the prediction value and the set value, so the problems of poor stability of the system caused by large fluctuation of disturbance factors and the time delay of the system are solved.
Owner:CENT SOUTH UNIV
Quadrotor unmanned aerial vehicle control method
InactiveCN105786021AImprove quick responseGlobal robustnessPosition/course control in three dimensionsUncrewed vehicleEngineering
The invention belongs to the field of unmanned aerial vehicle control and particularly relates to a quadrotor unmanned aerial vehicle control method. An attenuation function of a dynamic sliding mode surface in global sliding mode control is designed into a one-order differentiable function composed of three exponential function items, and thus can be attenuated to zero in limited time. Thus, global robustness of the global sliding mode control of a quadrotor unmanned aerial vehicle is achieved, the dynamic sliding mode surface can be evolved into a linear sliding mode surface in limited time, and thus the dynamic responding speed of the system is increased. The quadrotor unmanned aerial vehicle control method is suitable for the field of control over quadrotor unmanned aerial vehicles.
Owner:TIANJIN POLYTECHNIC UNIV
Modular joint of collaborative robot
The invention discloses a modular joint of a collaborative robot, and belongs to the technical field of robots. The modular joint of the collaborative robot comprises a joint shell, a motor, a harmonic speed reducer and a brake structure, the motor used for driving the harmonic speed reducer to rotate is installed in the joint shell, the harmonic speed reducer serves as a front cover of the jointshell to be installed at the end of the joint shell, the output end of the harmonic speed reducer is arranged in the joint shell and connected with an encoder assembly, a brake pad is installed at theoutput end of the motor, and the brake structure used for controlling the brake pad to be in a brake state or a non-brake state is installed on the encoder assembly. The modular joint of the collaborative robot is sufficient in position braking precision, sufficient in braking force, high in force feedback sensitivity, compact in structure, good in replaceability, capable of being produced on a large scale, high in cooperativity and high in safety.
Owner:CHENGDU CRP ROBOT TECH CO LTD
Sailboat sports simulation training platform and control method thereof
InactiveCN108461010AExercise actual combat control abilitySimple structureCosmonautic condition simulationsSport apparatusSimulationEngineering
The invention relates to a sailboat sports simulation training platform. The sailboat sports simulation training platform comprises a base plate and a simulation sailboat, wherein a lower end of the base plate is provided with a first support frame, the middle portion of the upper portion of the base plate is provided with a second support frame, the first support frame comprises a vertical shaft,the base plate can be rotatably supported on the vertical shaft, the second support frame comprises a transverse shaft, the simulation sailboat can be rotatably supported on the transverse shaft, a left and right rocking mechanism is arranged below one side of the base plate to realize vertical angle adjustment, and a front and back rocking mechanism is arranged below one side of the simulation sailboat to realize transverse angle adjustment. The invention further relates to a control method for the training platform, a real-time sailboat state recorder is further comprised, the real-time sailboat state recorder is utilized to acquire actual operation parameters of the sailboat in the sea in real time, through the training platform simulating the actual operation parameters of the sailboat in the sea in real time, a trainer adjusts a self-balancing training device by himself to exercise the actual combat control ability.
Owner:OCEAN UNIV OF CHINA
Data modeling method for data mart and data warehouse
PendingCN112084182AGuarantee data standardizationEasy access to historical changesFinanceDatabase management systemsDatasheetData set
The invention relates to the technical field of data marts and data warehouses, in particular to a data modeling method for data marts and data warehouses, which comprises the following steps: a stepof building a bus architecture: extracting main data of a service system for automatic integration, obtaining a public consistency dimension, and building a standard bus interface; a data processing step: classifying the business data tables, and automatically screening a data extraction mode to extract the business data tables according to a classification result; and a model integration step: combining the business data tables through the inverse three normal forms, splitting the business data tables to form a fact table and a plurality of dimension tables, and constructing a dimension modelwhich takes the fact table as a main part according to the fact table and the plurality of dimension tables. By the adoption of the scheme, the technical problems that in the prior art, due to the fact that all independent data markets are independently constructed by all users or departments, data architectures of the independent data markets are independent of one another and cannot be reused,data islands are easily caused, and meanwhile standardization, consistency and accuracy of enterprise data cannot be guaranteed can be solved.
Owner:重庆富民银行股份有限公司
Six-freedom-degree parallel machine arm driven by tubular linear motors and control method of six-freedom-degree parallel machine arm
PendingCN108145699AReduce lossSimple structureProgramme-controlled manipulatorAC motor controlLower limitTubular linear motor
The invention relates to a six-freedom-degree parallel machine arm driven by tubular linear motors and a control method of the six-freedom-degree parallel machine arm. The parallel machine arm comprises a fixed platform, a movable platform, upper limiting photoelectric sensors, lower limiting photoelectric sensors, grating ruler sensors and parallel controllers. The multiple tubular linear motorsare evenly distributed between the fixed platform and the movable platform. Each tubular linear motor comprises an outer circular pipe and a drive shaft, wherein the outer circular pipe is internallyprovided with a motion cavity and a drive cavity which are in communication in the axial direction, the diameter of the motion cavity is larger than that of the drive cavity, the upper end, stretchinginto the motion cavity, of the drive shaft is provided with a limiting block, and the corresponding upper limiting photoelectric sensor and the corresponding lower limiting photoelectric sensor are correspondingly arranged at the two ends of the drive cavity. The grating ruler sensors are arranged between motor stator windings and the drive shafts. The parallel controllers are connected with theupper limiting photoelectric sensors, the lower limiting photoelectric sensors and the grating ruler sensors correspondingly and connected with the motor stator windings through motor drivers. Compared with the prior art, the six-freedom-degree parallel machine arm has the beneficial effects of being small in weight, small in size, high in motion speed and efficiency and the like.
Owner:MINJIANG UNIV
Permanent-magnet linear motor based on arc-shaped and inner-step shaped hybrid structure of stator
ActiveCN108258877AReduce thrust fluctuationImprove power densityDesign optimisation/simulationPropulsion systemsPermanent magnet linear motorConductor Coil
The invention discloses a permanent-magnet linear motor based on an arc-shaped and inner-step shaped hybrid structure of a stator. The motor comprises a stator armature primary side and a Halbach permanent-magnet mover secondary side, the stator armature primary side is located on the outer side of the permanent-magnet mover secondary side, the stator armature primary side is formed by a stator iron core and an armature winding, inner-step shaped structures are adopted by the ends of two sides of the stator iron core, and arc-shaped structures are adopted by inner teeth of the stator iron core; the permanent-magnet mover secondary side is formed by a mover iron core and a permanent magnet adhering to the surface the of the iron core, and a Halbach array structure is adopted by the permanent magnet. By means of the motor, air gap magnetic flux larger than a conventional magnet can be obtained, the motor has a better magnetic shielding effect, and the thickness of a magnetic conductive yoke of the mover can be reduced. The invention provides an analysis model of an arc-shaped tooth structure, and the magnitude of magnetic conductance and a magnetic conductance-position variation curve can be derived by means of the model. The optimal structure of the motor is obtained by adopting a Taguchi optimization algorithm.
Owner:SOUTHEAST UNIV
High-speed high-temperature friction and wear test bed adopting symmetrical loading
PendingCN112147068ASimple mechanical structureReduce noiseUsing mechanical meansMaterial analysisPhysicsEngineering
The invention provides a high-speed high-temperature friction and wear test bed adopting symmetrical loading, and belongs to the field of high-speed high-temperature friction and wear tests. The high-speed high-temperature friction and wear test bed comprises a base, a driving module, a test module, a heating module and a measurement monitoring module, wherein power and a high-temperature environment are provided for the test module through the driving module and the heating module respectively; a high-speed electric spindle of the driving module is fixed at one end of a bottom plate through aclamping mechanism, and an output shaft of the high-speed electric spindle is connected with the test module through a flexible coupling; the test module comprises a mechanical shaft, a bearing seatand loading devices; two ends of the mechanical shaft are supported and mounted at the other end of the bottom plate through the bearing and the bearing seat respectively; a test ring is coaxially mounted in the middle of the mechanical shaft through a modular test ring mounting seat and driven by the high-speed electric spindle to rotate synchronously; the two loading devices are symmetrical about the central axis of the mechanical shaft and fixed on the bottom plate; and the highest test rotating speed can reach 30,000 r / min, the highest linear speed of a contact point of the test ring and atest block can reach 400m / s, and the test is stable to complete the measurement function.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Engine start-up device for hybrid vehicle power transmitting device
ActiveUS8197384B2Improve quick responseIncrease rotation speedHybrid vehiclesInternal combustion piston enginesHybrid vehicleStart up
Owner:TOYOTA JIDOSHA KK
Digital electrichydraulic control system for generating plant turboset
ActiveCN101307699BImprove quick responseSwitching speed fluctuation is smallMachines/enginesEngine componentsPower stationControl system
Owner:SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
Permanent magnet synchronous electric spindle speed regulating system and control method thereof
InactiveCN110611463AGood quick responseSuppression of torque rippleTorque ripple controlElectric motor controlPower inverterMagnetic flux
The invention belongs to the field of numerical control processing. In order to solve the problem that a permanent magnet synchronous motor has poor fast response capability and is affected by torqueripple, the invention provides a permanent magnet synchronous electric spindle speed regulating system and a control method thereof. The system comprises a main circuit and a control circuit. The maincircuit comprises a power inverter circuit and a permanent magnet synchronous motor. The electric spindle of the permanent magnet synchronous motor is connected with the power inverter circuit. The control circuit comprises a speed regulator, a magnetic flux generator, a torque regulator, a magnetic flux regulator, two current hysteresis comparators, SVPWM, a magnetic flux observer and a voltagevector meter. According to the invention, hybrid drive control is used to replace traditional vector control and direct torque control, so that the system has better fast response capability; torque and magnetic flux are indirectly controlled through a voltage vector switch meter; and the problem of torque ripple generated in a direct torque system is effectively suppressed.
Owner:JIANGSU UNIV OF TECH
Method, system, medium and equipment for optimizing hill-holding jitter of electric vehicle
PendingCN114801770AWide adaptabilityAvoid Overshoot OscillationsSpeed controllerControl devicesElectric machineryAutomotive engineering
The invention discloses a method, a system, a medium and equipment for optimizing hill-holding jitter of an electric automobile, and the method comprises the following steps: 1) when a brake pedal is not activated and the rotating speed of a motor has a negative rotating speed of more than n at a forward gear or has a positive rotating speed of more than n at a reverse gear, after the state is continuously x times, determining that the automobile slips on a slope, and entering hill-holding control at the moment; 2) selecting a corresponding PI parameter according to the rotating speed when entering the hill-holding control, and carrying out rotating speed ring P I control; wherein the rotating speeds are different when the slope holding control is started, and the corresponding P I parameters are different; and (3) when the hill-holding time reaches the locked-rotor protection time threshold value and the brake pedal or the accelerator pedal is activated, the hill-holding control is quitted. The method has the advantages that the quick response of the vehicle is remarkably improved, the backward sliding distance of the vehicle is reduced, the safety of the vehicle is improved, the response smoothness is guaranteed, shaking impact is avoided, and the NVH performance of the whole vehicle is improved.
Owner:ZHUZHOU CSR TIMES ELECTRIC CO LTD
Card bin route selection method, device and system based on distributed cache
PendingCN111752978AImprove quick responseQuick responseDatabase distribution/replicationData switching networksEngineeringComputer network
The invention discloses a card bin route selection method, device and system based on distributed cache. The method comprises the following steps: acquiring a plurality of card bin data; loading the plurality of card bin data into a distributed cache database according to a preset data set form to form card bin set data; receiving a transaction message, and parsing the transaction message to obtain card number information; intercepting card bin data according to the card number information; accessing the card bin set data in the distributed cache database according to the intercepted card bindata, and determining a background system corresponding to the intercepted card bin data; and forwarding the transaction message to a background system for transaction processing. By adopting a distributed cache technology, card bin routing selection is improved, and the quick response of transaction processing is improved.
Owner:BANK OF CHINA
Jogging mechanism
InactiveCN107322352AHigh sensitivityFlexible transmissionFeeding apparatusAnti jammingMicro actuator
The invention discloses a micro-motion mechanism, which comprises a hand wheel, a support, a shaft sleeve, and a guide sleeve. A buffer layer is arranged inside the hand wheel, and a set screw and a washer are arranged between the hand wheel and the shaft sleeve. The bushing is provided with fixing screws, the bushing is provided with a screw rod, the bushing and the support are connected by screws, the guide bushing is provided with a guide rod, and the guide rod moves back and forth under the action of the screw rod. High sensitivity, the minimum moving amount meets the requirements of use, flexible and stable transmission, no lost motion and crawling, can maintain a stable position after braking, strong anti-interference ability, good quick response, and good structural and technological effects.
Owner:杨铭英
A Design Method of Electric Steering Gear Using Pure Fuzzy and Fuzzy PID Compound Control
ActiveCN107132761BImprove performanceMaintain reliabilityControllers with particular characteristicsAdaptive controlFuzzy pid controlControl engineering
Owner:YANTAI NANSHAN UNIV +1
Halbach array permanent magnet face gear set for orthogonal shaft drive
PendingCN106655704AReduce noiseHigh transmission efficiencyDynamo-electric gearsPermanent-magnet clutches/brakesMagnetic fluxEngineering
A Halbach array permanent magnet face gear set for orthogonal shaft drive belongs to the field of electromechanical drive. The invention aims to solve the problem that the torque transmitted by permanent magnet face gears and bevel gears currently used for orthogonal shaft drive is limited. According to the invention, the Halbach array permanent magnet face gear set for orthogonal shaft drive consists of two wheels. The two wheels are both magnetic gears, which are a cylindrical wheel and a face wheel. The face wheel is arranged horizontally. The cylindrical wheel is arranged above the face wheel. Shaft center lines of the cylindrical wheel and the face wheel are orthogonal. An air gap is left between the cylindrical wheel and the face wheel. When one of the wheels is a driving wheel, the other wheel is a driven wheel, and the driving wheel drives the driven wheel by magnetic force. The invention uses permanent magnets of the Habach array to produce a stronger air gap magnetic flux, and the torque that can be transmitted is greater.
Owner:HARBIN INST OF TECH
Intelligent medical management method and system based on 5G technology, terminal and medium
PendingCN114783586ATime controllableImprove quick responseHealthcare resources and facilitiesMedical equipmentMedical emergencyTracking model
The invention relates to the technical field of building power distribution, in particular to an intelligent medical management method based on the 5G technology, and the method comprises the steps: building a hospital three-dimensional structure model; establishing a patient doctor-seeing demand flow tracking model; positioning and tracking the hospital staff; acquiring a medical demand of a patient, and determining a target demand site; marking the target demand site of the patient and the position of a hospital worker in the three-dimensional structure model of the building; establishing a queuing model, summarizing the collected patient demands, and predicting the queuing time for the patient to see a doctor; locally deploying and building a 5G-MEC edge cloud platform; the calculation processing work of a building three-dimensional structure model marked with a patient target demand site, a patient medical demand flow tracking model, positioning tracking of hospital staff and a queuing model is submitted to a 5G-MEC edge cloud platform; based on the medical treatment demand of the patient, the 5G-MEC edge cloud platform is utilized to intelligently guide the patient to seek the medical treatment. The medical treatment efficiency of the patient is improved.
Owner:郑州大学第三附属医院
A reluctance magnetic face gear set for orthogonal shaft transmission
Owner:HARBIN INST OF TECH
Distribution of abnormal data analysis, fault positioning system and method
ActiveCN106990328BAccurate receptionPrecise positioningFault location by conductor typesMonitoring systemPower usage
Owner:STATE GRID SHANDONG ELECTRIC POWER +2
Environmental medium pressure adaptive sealing-packing pressing device
InactiveCN107401615AReduce consumptionSave energyEngine sealsEnvironmental resistanceEnvironmental media
Disclosed is an environmental medium pressure adaptive sealing-packing pressing device. The environmental medium pressure adaptive sealing-packing pressing device comprises a packing case, a stepped through hole is formed in the packing case, a rotating shaft penetrates the stepped through hole to form a filling cavity with the stepped through hole, and the filling cavity is filled with the sealing packing; a pressing disk is mounted on the inner side of the packing case, a flange matched with the filling cavity is arranged in the end face of the inner side of a central through hole of the pressing disk, fixing guide bars are mounted on the outer periphery of the stepped through hole and are connected with the pressing disk, axial expansion sacs are mounted on lateral faces of the pressing disk, and the axial expansion sacs are communicated with an external pressure medium via a booster through a pipeline. Pressure of the environmental medium is taken as a power source, energy sources are saved, and the pressing device is green and environment friendly and suitable for low-energy consumption during long voltage; meanwhile, sealing property and normal operation of the sealing packing are guaranteed; pressing force quickly changes with the environment pressure, and fast response is good; a stop valve is arranged at an easy-to-operate position, personnel burden is alleviated, and safety is good.
Owner:CHINA SHIP DEV & DESIGN CENT
A kind of reverse series control system and method of three DC motors
ActiveCN108880339BFast dynamic responseImprove anti-interference abilityField or armature current controlMultiple dc dynamo-electric motors controlCurrent transducerVoltage reference
The invention discloses a reverse serial connection control system and method for three direct-current motors. Eight IGBT modules of a four-phase inverter are connected in series two by two to form four bridge arms which are connected with the positive electrode and the negative electrode of a direct-current power supply in parallel; the three direct-current motors in reverse serial connection areconnected with the four bridge arms in series; the three direct-current motors pass through a speed sensor, a current sensor and a speed adjustment module in sequence and then are connected with a reference voltage synthesizer through a two-stage PI controller separately; the reference voltage synthesizer is connected with the four-phase inverter through a PWM pulse generation unit; the four-phase inverter is connected with the reference voltage synthesizer through a current adjusting module and a first-stage PI controller separately, and is connected to the PWM pulse generation unit throughthe reference voltage synthesizer; and pulse control signals generated by the PWM pulse generation unit are used for controlling on-off of the eight IGBT modules to drive the three current-current motors to run. By virtue of the reverse serial connection control system and method, four-quadrant operation of the three motors can be realized, the running direction and the operation speed of the motors can be changed, the energy of a motor feedback system can be sent back to the power grid, and the energy consumption is lowered.
Owner:徐州博柯斯健康科技有限公司
A Permanent Magnet Linear Motor Based on Stator Arc and Inner Ladder Hybrid Structure
ActiveCN108258877BSimple structureQuick responseDesign optimisation/simulationSpecial data processing applicationsElectric machinePermanent magnet linear motor
The invention discloses a permanent-magnet linear motor based on an arc-shaped and inner-step shaped hybrid structure of a stator. The motor comprises a stator armature primary side and a Halbach permanent-magnet mover secondary side, the stator armature primary side is located on the outer side of the permanent-magnet mover secondary side, the stator armature primary side is formed by a stator iron core and an armature winding, inner-step shaped structures are adopted by the ends of two sides of the stator iron core, and arc-shaped structures are adopted by inner teeth of the stator iron core; the permanent-magnet mover secondary side is formed by a mover iron core and a permanent magnet adhering to the surface the of the iron core, and a Halbach array structure is adopted by the permanent magnet. By means of the motor, air gap magnetic flux larger than a conventional magnet can be obtained, the motor has a better magnetic shielding effect, and the thickness of a magnetic conductive yoke of the mover can be reduced. The invention provides an analysis model of an arc-shaped tooth structure, and the magnitude of magnetic conductance and a magnetic conductance-position variation curve can be derived by means of the model. The optimal structure of the motor is obtained by adopting a Taguchi optimization algorithm.
Owner:SOUTHEAST UNIV
Pressure Balance Valve Common Rail Injector
InactiveCN105673282BSmall pressure fluctuationsIncrease injection rateFuel injection apparatusMachines/enginesCommon railEngineering
The invention discloses a pressure-balanced valve type common-rail fuel injector which comprises a fuel injector body, a piston rod, fuel nozzle matching parts, pressure-balanced valve matching parts and an electromagnetic valve assembly.The fuel injector body is connected with the electromagnetic valve assembly, the pressure-balanced valve matching parts are connected with the fuel injector body, and the fuel injector body is connected with the fuel nozzle matching parts.The fuel nozzle matching parts comprise a needling valve, a step-shaped cavity is formed in the axial center of the fuel injector body, a sealing cavity is formed between the pressure-balanced valve matching parts and the piston rod, a protrusion is arranged on one side of the fuel injector body and provided with an inclined first fuel inlet hole of the fuel injector body, and a second fuel inlet hole of the fuel injector body is formed in the lower side of the first fuel inlet hole and is communicated with a fuel storage cavity in the lower portions of the pressure-balanced valve matching parts.The fuel injector body is connected with a high-pressure rail pipe, a fuel injector body fuel inlet is communicated with an upper portion inner hole, the upper portion inner hole is connected with a sealing cavity through a throttling hole, and a valve seat installation hole is formed in the upper portion of the upper portion inner hole and matched with the pressure-balanced valve matching parts.The diameter of the sealing surface on the upper portion of the piston rod is larger than the diameter of the intersecting line of the needle valve.
Owner:龙口龙泵柴油喷射高科有限公司
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