34results about How to "Simplify the control link" patented technology

The invention discloses a blade electro-hydraulic adjustment method and device of a high-oil-pressure control water turbine. A fuzzy mathematic model is established for a selected blade angle calculation method according to hydropower station hydrologic data and unit parameters. Then, a high-oil-pressure control blade adjustment electro-hydraulic actuator adjusts a rotating blade to the calculated angle according to changes of the water head and flow, and therefore high hydraulic energy conversion efficiency is obtained, and the target of the maximum annual energy output of a high-oil-pressure control blade angle rapid adjustment hydroelectric generating set is achieved. According to the key technology, a high-oil-pressure control system is adopted for the turbine blade adjustment actuator, a standard ball floating seal is adopted, and therefore the problem of oil leakage of a high-oil-pressure rotating sealing device is completely solved. The blade electro-hydraulic adjustment method and device fill in technical gaps in controlling blade adjustment by a Kaplan turbine through the high-oil-pressure speed controller system, and great technical innovation is achieved for the structural design of the water turbine.

The invention discloses a method for designing parameters of LC coupling type SVG (static var generators) in unbalanced power grids, and a method and a system for controlling the LC coupling type SVG.The methods and the system have the advantages that reactive and negative-sequence currents in the unbalanced power grids can be compensated by the aid of the method for designing the parameters whenminimum voltages are required by direct-current sides; voltages inverted and outputted by the VSC are lower than voltages of the power grids when the LC coupling type SVG determined by the aid of themethod for designing the parameters are used for compensating capacitive reactive power, accordingly, capacitive voltages on the direct-current sides can be lowered to a great extent, power and switching loss can be reduced, and the cost can be decreased; the method for controlling the LC coupling type SVG is based on unbalance control strategies with combination of compensation reference voltagedetection of improved SOGI (second-order generalized integrators) and QPR (quasi-proportional-resonant) control, compensation reference currents are directly tracked and controlled by the aid of theQPR control in alpha beta coordinate systems, integral control links are quite simple, and delay and errors in control procedures can be eliminated.

The invention relates to a production method of triethyl phosphite, which belongs to the technical field of chemical production. Absolute ethyl alcohol, phosphorous trichloride are taken as main material, pure benzol is taken as solvent, triethylamine is taken as acid-binding agent, liquid ammonia is taken as reducing agent, and the triethyl phosphate is prepared through the processes of three-complex liquor preparing, synthetic reaction, water scrubbing reaction, layering, drying, crude distillation, rectifying, recovering and ammonia recovery and the like. The method adopts continuous production process of triethylamine, the material charging and the product discharging are continuous, the production capacity is strong, and the product quality is stable. With equal equipment and investment, the capacity of the method can be 6 to 7 times as the capacity of intermittent method. The method solves the problems of the prior production method that the production capacity is small, the production cycle of the product is long, the material consumption is large, the quality is unstable, the discharge amount of 'three wastes' is large, and the yield can not be guaranteed. The method has the advantages that the liquid ammonia is taken as reducing agent, the cost is low, the recovery factor of excess ammonia can reach more than 90 percent, the recovered ammonium chloride can be used as the crude product of ammonium fertilizer, the production cost is lowered, and the environmental pollution is reduced.

The invention discloses a full-automatic winch take-up system, which comprises an electromagnetic braking take-up winch, an auxiliary tension device, a detection system and a take-up control system. The detection system comprises a tension sensor and a transmitter. The auxiliary tension device is connected with the tension sensor, and the detection system is connected with the take-up control system. A combination control switch of the winch of the take-up control system is connected with an electromagnetic brake of an electromagnetic brake motor of the electromagnetic braking take-up winch and a take-up motor, and the electromagnetic brake is connected with the axis of the take-up motor and a coupling. The full-automatic winch take-up system has the advantages of simple control link and faster response of the winch and the control system; and the tension device has the overall tension control and protection functions after the interruption of a power supply. The electromagnetic braking take-up winch and the take-up control system have faster, more stable and accurate tension control; the tension control and protection functions of the tensioning system after the interruption of the power supply is increased simultaneously; and a belt conveyor is designed to be more reasonable and economic.

The invention relates to a flexible direct current active power control method for an alternating current and direct current hybrid power transmission system. The flexible direct current active power control method is characterized in that the power transmission system comprises one or more flexible direct current transmission lines which are in parallel operation to one or more alternating current lines; during normal operation, the flexible direct current transmission lines are operated as per set rated active power and reactive power, and active power of the alternating current lines is not reversely transmitted by automatically adjusting active power of the flexible direct current transmission lines. According to the flexible direct current active power control method for the alternating current and direct current hybrid power transmission system, active power control requirements of a flexible direct current device can be met, linear control links are simple, and the method is simple to implement in engineering and good in control stability.

The invention relates to a dual clutch type variable transmission device with a planetary gear train. The device consists of a sun axle, a first countershaft, a second countershaft, an intermediate shaft, dual clutches, a synchronizer, a gear and a planetary gear train, by the combination of the planetary gear train, the dual clutches, the synchronizer and the gear, automatic smooth gear shifting can be realized; and by a structure of the planetary gear train and the sharing gear, the gear number is greatly increased, and the number of shift gears can be reduced. Each pair of gears has less small speed ratio and is in a short transmission shaft structure, so the rigidness of a speed changer is improved, and the radial and axial sizes of the speed changer are reduced; a cylindrical gear is used for replacing a conical gear, so a differential mechanism has a compact structure, the manufacture cost of the differential mechanism is reduced, the gear axial pressure of the conical gear differential mechanism is eliminated, and the transmission efficiency of the differential mechanism is improved.

The invention provides a controllable series compensation device based on parallel connection of double TCR (Thyristor Controlled Reactor) branch circuits and a control method thereof, which belong to the field of controllable series compensation in the field of flexible alternating current power transmission. The controllable series compensation device uses parallel connection of two TCR (Thyristor Controlled Reactor) branch circuits and makes current passing through each TCR (Thyristor Controlled Reactor) branch circuit be smaller, so that the problem that the current thyristor valve has insufficient through-current capability in ultrahigh voltage controllable series compensation is solved. The TCR (Thyristor Controlled Reactor) branch circuit is formed in a manner that two inverse parallel thyristor valves are connected in series with a reactor, and the two TCR (Thyristor Controlled Reactor) branch circuits are connected in series to form a controllable series compensation device; or the two TCR (Thyristor Controlled Reactor) branch circuits are connected in parallel and then are connected in series with a common reactor to form a controllable series compensation device; and the current equalizing and impedance requirements of branch circuits are realized by control of equal circuit amplitudes of the two TCR (Thyristor Controlled Reactor) branch circuits of the series compensation device and control of fundamental wave impedance. The device can meet the requirements of the impedance control, and has simple control process and uses linear control; and the device is easy to realize in engineering, along with good control stability.

The present invention provides a semiconductor technology equipment control system, referring to communication field. Said control system consists of technology processing module controller (PMC) and relevant interface module, equipment module controller (EMC) and plant engineering data base (EEDB), wherein EMC used as integrating control unit connected with PMC, EEDB and interface module for total scheduling and controlling; EEDB connected with EMC and PMC for collecting and storing information from EMC and PMC and providing relevant parameter. The present invention can integrate three large systems at equipment terminal, greatly simplifying software and hardware configuring for semiconductor equipment manufacturer.

The invention relates to a flexible direct current active power control method for an alternating current and direct current hybrid power transmission system. The flexible direct current active power control method is characterized in that the power transmission system comprises one or more flexible direct current transmission lines which are in parallel operation to one or more alternating current lines; during normal operation, the flexible direct current transmission lines are operated as per set rated active power and reactive power, and active power of the alternating current lines is not reversely transmitted by automatically adjusting active power of the flexible direct current transmission lines. According to the flexible direct current active power control method for the alternating current and direct current hybrid power transmission system, active power control requirements of a flexible direct current device can be met, linear control links are simple, and the method is simple to implement in engineering and good in control stability.

The invention relates to a multi-clutch type variable transmission device and relates to a double-clutch variator. The multi-clutch type variable transmission device comprises an input shaft, a first auxiliary shaft, a second auxiliary shaft, an output shaft, double clutches, a synchronizer and gears. According to the multi-clutch type variable transmission device provided by the invention, by virtue of the combination of the two double clutches, the synchronizer and the gears, the gear is automatically and smoothly changed; by virtue of the structure of sharing the gears and adding one double clutch, the gear number is greatly increased, and the amount of gear shifting gear is reduced; and as each pair of gears adopt a small velocity ratio and a short transmission shaft structure, the rigidity of a variator is strengthened, the radial and axial sizes of the variator are reduced, and the structure of the variator is compact.

The invention discloses a blade electro-hydraulic adjustment method and device of a high-oil-pressure control water turbine. A fuzzy mathematic model is established for a selected blade angle calculation method according to hydropower station hydrologic data and unit parameters. Then, a high-oil-pressure control blade adjustment electro-hydraulic actuator adjusts a rotating blade to the calculated angle according to changes of the water head and flow, and therefore high hydraulic energy conversion efficiency is obtained, and the target of the maximum annual energy output of a high-oil-pressure control blade angle rapid adjustment hydroelectric generating set is achieved. According to the key technology, a high-oil-pressure control system is adopted for the turbine blade adjustment actuator, a standard ball floating seal is adopted, and therefore the problem of oil leakage of a high-oil-pressure rotating sealing device is completely solved. The blade electro-hydraulic adjustment method and device fill in technical gaps in controlling blade adjustment by a Kaplan turbine through the high-oil-pressure speed controller system, and great technical innovation is achieved for the structural design of the water turbine.

The invention provides a high-voltage direct-hanging energy storage method and a high-voltage direct-hanging energy storage system for eliminating charging and discharging frequency multiplication current of a battery, and the method comprises the following steps: a single-star-type connected high-voltage direct-hanging energy storage power conversion step: injecting a set frequency-tripling common-mode voltage into bridge arm modulation voltage of a converter, the harmonic frequency in the direct-current bus current of the power module is increased to quadruplicated frequency from double frequency, and the set triple frequency common-mode voltage is directly superposed in the bridge arm modulation voltage; the single-angle-type connected high-voltage direct-hanging energy storage power conversion method comprises the following steps: injecting a set frequency-tripling common-mode current into a bridge arm of a converter, increasing the harmonic frequency in a direct-current bus current of a power module to quadruplicated frequency from double frequency, calculating a required frequency-tripling common-mode voltage according to the set frequency-tripling common-mode current, and carrying out single-angle-type connected high-voltage direct-hanging energy storage power conversion on the required frequency-tripling common-mode voltage, and the voltage is superposed to a bridge arm modulation voltage. According to the invention, the secondary harmonic current in the DC bus of the power module can be eliminated fundamentally, so that the demand of the system for a passive filter is reduced, and the power density of the system is improved.

The present invention relates to a cross-type robot driving articulation based on the shape memory alloy, which has a main structure of a Hooke joint mechanism comprising a fixed hinge mount 1, a cross 6, and a movable hinge mount 7. Four pulleys 5 are respectively fixed on the four shaft shoulders of the cross 6. The four shaft shoulders of the cross 6 are respectively arranged into the circular aperture of the side wall of the fixed hinge mount 1 and the movable hinge mount 7. Four ropes wind on the four pulleys 5 respectively, and each of the two ends of each rope are connected with a SMA spring 3, the other end of the SMA spring is connected to the hinge mount which is positioned at the same side as the spring. The present invention simplifies the structure and the control unit, reduces the error, improves the degree of freedom and the rigidity of the articulation, and improves the combined property of the robot.

The invention belongs to the technical field of plastic forming machining and relates to a titanium alloy sheet heat stretching forming tooling and a forming method. The device comprises a bottom plate, triangular supports, clamps, main shafts, three-segment spacer sleeves, buckles and a stretching half die. The triangular supports are symmetrically arranged on the two sides of the bottom plate, horizontal right-angle sides of the triangular supports are in threaded connection with the bottom plate, and vertical right-angle sides of the triangular supports and the main shafts are mounted in amatched mode; the middles of the vertical right-angle sides are fixedly connected with the three-segment spacer sleeves correspondingly; the buckles can rotate around the corresponding main shafts; the two ends of the clamps are in bolt connection with ear plates of the buckles correspondingly; the ends of sheet metal are clamped into the clamps; and the lower end of the stretching half die is provided with a terrace die body with double degrees of curvature, the half die moves downwards to be attached to the sheet metal, and heat stretching forming of the sheet metal is achieved. According tothe titanium alloy sheet heat stretching forming tooling and the forming method, half die forming is adopted, the number of the forming dies is decreased by half, and the clamps are universal; the forming precision is improved, the resilience value is reduced, and thickness reduction is controlled; and tedious procedures such as heat treatment are omitted, links are controlled to be simplified, energy and material wasting is reduced, the development period is shortened, and the product quality stability is improved.

The invention relates to a gear combined type variable-speed transmission device. The gear combined type variable-speed transmission device consists of an input shaft, an output shaft, an intermediate shaft, clutches (or synchronizers) and gears. More than 6 clutches or one clutch and more than 6 synchronizers and more than 9 gears are combined in serial-parallel connection modes, the gear number is remarkably increased, and the number of shifting gears is decreased. Due to the fact that each pair of gears has small speed ratio and adopts a short transmission shaft structure, the rigidity of a transmission is improved, the radial and axial sizes are reduced, and the transmission is compact in structure and high in mechanical efficiency. The invention further provides a reverse gear device used on a mechanical variable-speed transmission mechanism.

The invention relates to a lawn sprayer, in particular to a region variable lawn sprayer based on frequency control water supply, and the key part of the invention is the drop point accurate controlling mechanism which mainly realizes the function of drop point controlling and circumference locating controlling. The circumference locating is realized by connecting bayonets between a stop collar and a housing, as well as the housing and a T-junction. The controlling of the drop point is realized through a guiding piece mounted on the outer side of the sprayer and a positioning screw on the stop collar. The lawn sprayer drop point accurate controlling mechanism can realize accurate positioning of the drop point of the region variable lawn sprayer under open-loop controlling, the controlling unit is simplified, and arbitrary spraying region can be realized by different guiding grooves processed by the guiding piece. The region variable lawn sprayer drop point accurate controlling mechanism has the advantages of simple structure and reliable operation.

The invention discloses a double-heating-plates sequential hot printing rotary printing machine. The machine is characterized in that two printing plates are arranged on two sides of a rotating shaft correspondingly, the rotating shaft rotates to drive the two printing plates to alternately face heating plates, a second downward pressing device performs downward pressing motion to enable a first downward pressing device to perform downward pressing motion, the first downward pressing device is static in sequence, an initial moment when the first downward pressing device is static occurs at an initial moment when the first heating plate presses downwards to textiles on the first printing plate to perform hot printing on the textiles, the second downward pressing device performs upward reset motion to enable the first downward pressing device to be static, the upward reset motion of the first downward pressing device is sequentially performed, and the rotating shaft rotates within a time period of the upward reset motion of the first downward pressing device. The invention further discloses a textile printing method. The machine and the method have the advantages that the textiles made of different materials can be subjected to hot printing in the same unit time and on the same device, the working gap during hot printing is reasonably utilized, the control steps are reduced, and the process streamline is improved.

The invention discloses a device for controlling and analyzing a PI (Physik Instrumente) micropositioner, and the device is mainly used for a subsystem of a nano-positioning workpiece table. An upper computer takes port data as the control input of the PI micropositioner, and the port data is sent to a port data receiving and sending module to be processed; a data processing module in the device converts ASCII (American Standard Code for Information Interchange) Command data flow in the port data into GCS (Gate Control and Sequencing Computer) Command data flow which can be identified by the PI micropositioner; the GCS Command data flow is sent to the PI micropositioner by a serial port data receiving and sending module; the serial port data receiving and sending module in the device is in charge of receiving the feedback data of the PI micropositioner; the GCS Command data flow is converted into the ASCII Command data flow by a data analysis module; and after the port data receiving and sending module packages the analyzed data according to a specified format again, the data is sent to the upper computer. The device is integrated in the original control circuit, and the control link of the PI micropositioner is simplified on the premise that the original control function is not affected, therefore the subsystem of a nano-positioning workpiece table has the advantages of more compact structure, more reliable performance and stronger instantaneity.

The invention discloses a device for controlling and analyzing a PI (Physik Instrumente) micropositioner, and the device is mainly used for a subsystem of a nano-positioning workpiece table. An upper computer takes port data as the control input of the PI micropositioner, and the port data is sent to a port data receiving and sending module to be processed; a data processing module in the device converts ASCII (American Standard Code for Information Interchange) Command data flow in the port data into GCS (Gate Control and Sequencing Computer) Command data flow which can be identified by the PI micropositioner; the GCS Command data flow is sent to the PI micropositioner by a serial port data receiving and sending module; the serial port data receiving and sending module in the device is in charge of receiving the feedback data of the PI micropositioner; the GCS Command data flow is converted into the ASCII Command data flow by a data analysis module; and after the port data receiving and sending module packages the analyzed data according to a specified format again, the data is sent to the upper computer. The device is integrated in the original control circuit, and the control link of the PI micropositioner is simplified on the premise that the original control function is not affected, therefore the subsystem of a nano-positioning workpiece table has the advantages of more compact structure, more reliable performance and stronger instantaneity.

The invention relates to a voltage stabilizing system, in particular to a boost chopping technology-based variable-frequency voltage stabilizing control system and a method, which belong to the electric automation field. The booster chopping technology-based variable-frequency voltage stabilizing control system mainly comprises a host computer, a program logic controller (PLC) 1, a variable-frequency system 2, a CC-LINK on-site bus 6, a remote monitor 5, a speed regulator 10 and a boost voltage frequency control conversion circuit; the PLC 1 is connected with the variable-frequency system 2 in a communication way through the CC-LINK on-site bus 6; the signal input end of the PLC 1 is respectively connected with an energy storage signal, an energy release signal and an alarming signal, and then the PLC 1 operates and processes the inputted data through a central processing unit CPU 13; and the output of the stabilized voltage of the system can be realized through a voltage / frequency (V / F) conversion circuit 24. The voltage stabilizing control system has good filter performance, a good energy-saving effect, good static performance and good dynamic performance, realizes the real-time monitoring, and improves the transmission accuracy and reliability of the control signal.

The invention relates to a lawn sprayer, in particular to a region variable lawn sprayer based on frequency control water supply, and the key part of the invention is the drop point accurate controlling mechanism which mainly realizes the function of drop point controlling and circumference locating controlling. The circumference locating is realized by connecting bayonets between a stop collar and a housing, as well as the housing and a T-junction. The controlling of the drop point is realized through a guiding piece mounted on the outer side of the sprayer and a positioning screw on the stop collar. The lawn sprayer drop point accurate controlling mechanism can realize accurate positioning of the drop point of the region variable lawn sprayer under open-loop controlling, the controlling unit is simplified, and arbitrary spraying region can be realized by different guiding grooves processed by the guiding piece. The region variable lawn sprayer drop point accurate controlling mechanism has the advantages of simple structure and reliable operation.

The invention relates to a preparation process of triethylphosphite, belonging to the technical field of chemical production. Absolute alcohol and phosphorus pentachloride are adopted as main raw materials, and dimethylaniline and triethylamine are adopted as solvents. Production capacity is high and product quality is stable. When the entire operating system reaches equilibrium, control links arevery simple, and process indicators of the product are basically balanced.

The invention relates to a gear combined type variable-speed transmission device. The gear combined type variable-speed transmission device consists of an input shaft, an output shaft, an intermediate shaft, clutches (or synchronizers) and gears. More than 6 clutches or one clutch and more than 6 synchronizers and more than 9 gears are combined in serial-parallel connection modes, the gear number is remarkably increased, and the number of shifting gears is decreased. Due to the fact that each pair of gears has small speed ratio and adopts a short transmission shaft structure, the rigidity of a transmission is improved, the radial and axial sizes are reduced, and the transmission is compact in structure and high in mechanical efficiency. The invention further provides a reverse gear device used on a mechanical variable-speed transmission mechanism.

A two TCR branches in parallel based controllable series-compensated device and a control method thereof are provided. The controllable series-compensated device includes two TCR branches in parallel, causing a lower current in each TCR branch and thereby solving the problem of the shortage of flow capacity of existing thysitors in an extra-high-voltage controllable series-compensated device. The TCR branch is composed of two antiparallel thyristors in series with a reactor (L1, L2) and then two TCR branches are connected in parallel, which forms the controllable series-compensated device; or two TCR branches in parallel are in series with a common reactor (L3), which forms the controllable series-compensated device. The demands of flow equalization and impedance are satisfied by controlling the equal current amplitudes in two TCR branches of the series-compensated device and the impendence of fundamental wave. The controllable series-compensated device could be satisfying the need of impendence control, of a simple controlling unit, using linear control, easy to carry out in practice and of good control stability.

The invention discloses a short-circuit current self-driven current-limiting direct-current circuit breaker. The short-circuit current self-driven current-limiting direct-current circuit breaker comprises a short-circuit current self-driven fast switch, a self-induction trigger, a voltage-limiting energy-absorbing assembly, a diode which is in anti-parallel connection with the fast switch, pulse switches which are connected with the cathode of the diode, a pulse capacitor of which one end is connected with one pulse switch, a current-limiting resistor connected with the other pulse switch and a pulse inductor of which one end is connected with the other end of the pulse capacitor. The other end of the pulse inductor is connected with the anode of the diode, one end of a charging contactor is connected with a positive inlet side of the circuit breaker, and the other end of the charging contactor is connected with one end of a fuse; the other end of the fuse is connected to one pole of the pulse capacitor, and the other end of the pulse capacitor is connected to the negative pole of the circuit breaker through the current-limiting resistor. According to the present invention, the rapid opening and the commutation current input are realized, and a commutation assembly is hung on a system for floating charging after being pre-charged, so that the composition is simple, the structure is novel, the response speed is higher, the disconnection is more reliable, and the current limiting effect is more prominent.

The invention aims at providing an electromagnetic type two-degree-of-freedom semi-active vibration absorber which comprises a stator, rotors and magnet exciting coils, wherein the rotors comprise a first rotor and a second rotor; the stator is installed outside the first rotor, and the magnet exciting coils are respectively arranged inside and outside the stator; the second rotor is installed outside the stator; and end caps are installed on both ends of the first rotor, the stator and the second rotor, and the first rotor and the second rotor axially move in relative to the end caps. The number of vibration absorbers used for controlling a plurality of exciting force frequencies is greatly reduced, installation space and cost are saved, a control link is simplified, and the vibration absorber has broad application prospect.

The invention discloses a parameter design method of an LC coupling type SVG under an unbalanced power grid and its control method and system. The parameter design method makes the required voltage on the DC side the minimum, and compensates reactive power and negative sequence current in the unbalanced power grid. ; When the LC-coupled SVG circuit determined by this method is used to compensate capacitive reactive power, the VSC inverter output voltage is smaller than the grid voltage, thereby greatly reducing the DC side capacitor voltage, reducing power and switching losses, and reducing The cost is reduced; the control method is based on an unbalanced control strategy combining the compensation reference current detection of the improved generalized integrator (SOGI) and the quasi-proportional resonance (QPR) control. Tracking control, the whole control link is very simple, and can eliminate the delay and error in the control process.