33results about How to "Steady state operation" patented technology

The invention relates to a self-power power supply frequency-hopping control based modular multilevel current converter voltage-sharing method. A charging-discharging principle of series-wound sub module capacitors is analyzed, and a capacitor charging-discharging mathematic model for series-wound power modules is established; controlled parameters affecting the capacitor voltage balance are determined; the capacitor voltage of each module is sampled and obtained for a large number of series-wound power modules, then an average value is obtained from the obtained capacitor voltages; the average value is the voltage-sharing target of each power module; when the capacitor voltage of the corresponding power module is greater than the average voltage value, the high-order energy-taking power supply (refers to the self-power power supply) is controlled to carry out continuous operation; when the capacitor voltage of the corresponding power module is lower than the average voltage value, a modulation signal for controlling the operation of the power supply is calculated firstly; then the frequency and the duty ratio of a triangular wave signal are calculated and determined; and finally the modulation signal is compared with the triangular wave signal to obtain an execution signal for controlling the operation of the power supply. By adoption of the method provided by the invention, the voltage-sharing control of a large number of series-wound power modules can be realized.

The invention relates to a double-motor series prediction type direct torque control method. Electromagnetic torque pulsation of two motors is reduced and the operation stability of a drive system is further improved. A zero sequence current is actively controlled, the distortion of a winding current is reduced, and the stable operation performance of the two motors is improved. In order to reduce system control operation time and improve the digital control rapidity, a prediction type electromagnetic torque and stator flux linkage control method of a partial voltage vector of which zero sequence plane voltage is 0 is employed. Through real-time adjustment of the action time of 0 and 21 or 0 and 42 voltage vectors, the control that the zero sequence current is 0 is realized.

The invention relates to a centrifugal extracting wastewater dephenolization technology. A high-speed centrifuge is used as an extraction device to perform centrifugal extraction separation. The technology comprises the steps as follows: phenol wastewater and an extraction agent enter the centrifuge simultaneously for centrifugal extraction separation, an extract phase phenol solvent and extract phase wastewater are produced after separation, the extract phase phenol solvent enters a solvent recovery tower for rectification separation, and a solvent and crude phenol are recovered; the extraction agent extracted at the top of the tower enters the centrifuge again to be recycled, and the crude phenol is recovered at the bottom of the tower. Compared with the prior art, the technology has the benefits as follows: the technology is low in investment, small in occupied area, simple and reliable in technological process, high in dephenolization efficiency and capable of realizing recovery of the industrial crude phenol.

The invention provides a method for improving the rated stable operation power of uniformity solution nuclear reactor, which is characterized in that a flat reactor core with the ratio of height and the diameter less than 0.5 is adopted to enlarge the surface area of reactor core fuel solution, to reduce the vacuolar coefficient of fuel solution, to control the surface releasing ratio of radiantly decomposed gas: hydrogen and oxygen and to control the reactor core specific power; ruthenium iron ions are added in reactor fuel solution and a device which converts nitrogen generated by the radiation and decomposition of HNO3 into HNO3 and an automatic continuous HNO3 supplementation system are additionally added, so as to enlarge the surface area of a heat exchanger, the gas circuit flux of nuclear reactor and hydrogen and oxygen composition capability of a hydrogen and oxygen compositor in the gas circuit, and to control the hydrogen consistency in the gas circuit. The method of the invention can ensure that the rated stable operation power of the uniformity solution nuclear reactor is higher than 200kW.

The invention relates to a dual-motor series connection open-phase fault-tolerant predictive direct torque control method which is composed of an inverter, a T6 transformation module, a rotating coordinate transformation module, two motor flux linkage calculation modules, a prediction model module and an evaluation function module. According to information such as the current, the rotor position angle, and the rotating speed of the kth topology, predicting the power switch combination of the inverter of the (k+1)th topology from the loss function minimum angle in virtue a stator flux and electromagnetic torque prediction model. The dual-motor series connection open-phase fault-tolerant predictive direct torque control method realizes the mutual operation of decoupling of two open-phase motors, improves a series connection drive system open-phase fault-tolerant capability, realizes precise control of the electromagnetic torque and the stator flux linkage of the two motors, and greatly reduces the steady state pulsations of the electromagnetic torque and the stator flux of the two motors so that the two motors are more stable in steady operation.

The invention discloses a sodium pyrosulfite production device which comprises a reaction crystallizer, a circulating pump, a crystal discharge pump and corresponding pipelines, a jet device is arranged at the top of the reaction crystallizer, a circulating liquid outlet is formed in the side face of the barrel of the reaction crystallizer and connected with the inlet of the circulating pump, and the outlet of the circulating pump is connected with a circulating liquid inlet of the jet device. The circulating pump and the reaction crystallizer are connected through the pipeline to form a circulating loop, a defoaming device is arranged at the top of the reaction crystallizer, reacted gas is discharged from the upper part of the defoaming device, a crystal discharge device is arranged at the lower part of the reaction crystallizer and is provided with a crystal discharge port, and the crystal discharge port is connected with the inlet of the crystal discharge pump. A detection instrument interface is arranged on the side surface of the reaction crystallizer barrel and is used for monitoring the temperature, pH and density of reaction materials; according to the invention, sodium pyrosulfite reaction and crystallization are integrated, continuous operation can be realized, the production efficiency is high, the reaction is thorough, and the prepared product is uniform in granularity and good in purity.

The invention is concerned with an energy sources system based on methane pyrolysis and fuel cells, relates to methane catalyzing and pyrolysis device, carbon cells and proton film cells. To keep steady flow operation, carry the methane catalyzing and pyrolysis inside the flowing bed with activator Ni at 500-750DEG C and get70%-80% transform efficiency. Use PEMFC to consume the hydrogen produced from methane pyrolysis, and the electricity efficiency is 0.4-0.65 at 25-100DEG C with well-rounded technology and great application. The carbon fuel cell's electrolyte is molten carbonate and it is used to consume carbon produced from methane pyrolysis, and the efficiency is 0.82 at 550DEG C. This technology owns high integration degree to separate hydrogen and carbon. The carbon cells greatly use all shapes of carbon resource with easy operation.

Provided are a color filter, a coating device for obtaining color filters, and an obtaining method, relating to the color filter technical field. The thickness uniformity of a color filter color layer is less than 1.2%. The coating device for obtaining color filters comprises a coating platform and a coating mechanism, and also comprises an initial segment elevating extension platform and an end segment elevating extension platform. The obtaining method comprises: cleaning and loading a glass matrix; adjusting the initial segment elevating extension platform and the end segment elevating extension platform, and maintaining surfaces flush; starting the coating mechanism; withdrawing the glass matrix which has the surface coated; and cleaning again. The coating device is provided with the initial segment elevating extension platform and the end segment elevating extension platform, allowing the film layers on the glass matrix to be all film layers which are rapidly completed by the coating mechanism in a stable operation stage, and improving glass matrix film thickness uniformity; the coating mechanism and a chip packaging device can both operate in a stable state, the service life of the device can be prolonged, and the cost can be reduced.

The invention discloses a kubernetes cluster service guarantee method, a kubernetes cluster service guarantee assembly and a kubernetes cluster service guarantee system. The guarantee method comprises a service repair method and a service scheduling method. The service restoration method is used for electing the service to be restored based on the resource usage amount and the importance degree of each service in the node when the total resource usage amount of the node reaches a preset usage amount threshold value, so that the stable state of the node is ensured, and the operation of the service is ensured to be in a steady state. The service scheduling method is used for scheduling a newly added service or a to-be-repaired service as a to-be-scheduled service, and comprises the following steps: when the to-be-scheduled service is an important service, taking a candidate node without the important service as a pre-selected node; and calculating a matching degree between the to-be-scheduled service and each pre-selected node, extracting a preferred node from the pre-selected nodes based on the matching degree, and scheduling the to-be-scheduled service to the corresponding preferred node. Independent and stable operation of important services can be guaranteed.

The invention discloses an adaptive optimal output feedback controller structure for two interconnected synchronous generator systems and a realizing method thereof. The controller structure is used for controlling a generator system I and a generator system II. The structure firstly aims at a condition of state observing incapability in practical application. A fuzzy observer is designed for estimating the power angles and the power angle speeds of the two interconnected synchronous generator systems and the mechanical frequencies of the generators, thereby reducing the control cost of the two interconnected synchronous generators, and overcoming defects in traditional state feedback control. Afterwards, a traditional adaptive back-stepping method is used for designing an adaptive back-stepping controller, and a performance index function of the two interconnected synchronous generator systems is estimated through neural network technology, and furthermore an optimal controller of thesystem is designed. Through cooperation of the adaptive back-stepping controller and an approximate optimal controller, the control method can ensure stable operation of the two interconnected generator systems and furthermore can reduce the performance index of the system.

The invention discloses a stone crushing device for municipal construction. The stone crushing device for municipal construction comprises a box body, a feeding groove is fixedly formed in the top ofthe box body, a crushing assembly is arranged in the box body, the crushing assembly comprises a fixing block and a cone, a bevel gear on a first transmission shaft is engaged with a gear shaft, a grinding wheel is fixedly connected to the gear shaft, a concave plate is arranged below the grinding wheel, one side of a partition plate is rotationally connected with a rotary shaft, the rotary shaftis provided with a connecting plate, the other side of the partition plate is provided with a screening assembly, and a damping assembly is arranged at the bottom of the box body. The device is reasonable in overall design, compact in structure, good in stone crushing effect and high in processing speed, different types of stone finished products can be obtained according to actual use requirements, and the arranged damping assembly can eliminate vibration caused by the device in the working process, so that the device operates in a stable state.

The invention provides a device and a method for maintaining high-performance plasma. The device comprises a central column; a vacuum container, which is arranged around the central column, and the vacuum container is used for containing the formed plasma; a plasma magnetic confinement system, which is used for limiting, forming and controlling the plasma in the vacuum container through a magnetic field, so that the plasma body forms a configuration with a plurality of fluids, wherein the multiple fluids form multiple layers from inside to outside, the fluid located on the outer layer surrounds the fluid located on the inner layer, and the adjacent fluids are at least partially overlapped. In the application, the configuration with a plurality of fluids is formed, wherein the high-energy electron fluid surrounds the thermionic fluid and the thermionic fluid, and the maintenance of the high-energy electron fluid enables the circumferential current to have a very large circumferential current outside the outermost closed magnetic surface, so that plasma turbulence and energy diffusion are effectively avoided; therefore, the recycling phenomenon of particles on the outermost closed magnetic surface is reduced, and the energy constraint capacity and stability of thermionic ions and thermionic electrons in the closed magnetic surface are effectively improved.

The invention discloses a natural convective recuperative room-temperature magnetic refrigerating device, which is characterized by the following: adapting gadolinium piece group as working substance and neodymium-iron-borax permanent magnet as magnetizing field; placing sheet working substance in the cold-storage liquid to keep still; rotating the magnet to magnetize and demagnetize the working substance gadolinium reciprocally; adapting the magnetothermal effect to refrigerate the working substance. The invention prevents the working substance and case from relative movement, which improves the refrigerating efficiency.

The invention discloses a method for quickly establishing a short-cut denitrification-anaerobic ammonia oxidation coupled denitrification system and application thereof, and the method comprises the following steps: based on a continuous flow complete mixing reactor of a novel combined filler, conducting mechanical stirring to enable the filler to be in a flowing state, inoculating anaerobic ammonia oxygen bacteria sludge particles in the reactor, adopting simulated wastewater for light-proof culture, optimizing technological parameters, and establishing the stable biological membrane-activated sludge short-cut denitrification-anaerobic ammonia oxidation (PD / A) efficient coupling denitrification system. According to the method, a biological membrane-activated sludge PD / A efficient coupling denitrification system is successfully established on the 81st day, stable operation can be achieved, and the removal rate of nitrogen reaches 93.89%.

A high-temperature-resistant all-tungsten plasma-oriented reactor mainly comprises an antenna, an antenna sleeve, a discharge tube, a front panel, an outer water cover plate, water circulating pipes,gas pipes, an observation pipe, water pipes A, water pipes B, a base, a pressure ring, a seal ring, a seal circle, an outer tungsten cover plate, an inner tungsten cover plate, an outer tungsten ring,an inner tungsten ring, an upper metal ring, a metal ring, a tungsten tube, a metal tube, a tungsten bottom cover plate, a pressure plate, a metal base, tungsten screws, water inlet holes A, water outlet holes B, water injection holes, water outlet holes B, water outlet holes C, a supporting ring, a connection barrel, a clamping barrel and a base. By the high-temperature-resistant all-tungsten plasma-oriented reactor, long-time steady-state operation of high-temperature high-density plasmas can be realized; 35kw plasma steady-state operation is already realized at present, and stable operation of the reactor in an environment with the internal temperature of 2000 DEG C can be realized; generated high-density plasmas can be used for researches of plasma-oriented tungsten material irradiation in fusion.

The present invention relates to a stainless steel single sealing head production method, which is characterized in that a target surface is bombarded for 6-8 min with a plasma flow under a low microwave power (less than or equal to 300 w) and a high target negative bias voltage (less than or equal to 1200 V) to remove the oxides and the absorbed materials on the target surface, and then the target negative bias voltage is removed under a high microwave power (1000 W). According to the present invention, the stainless steel single sealing head production method has advantages of scientific design, stable operation, simple equipment, high efficiency, easy parameter control, and the like.