39results about How to "With rectification" patented technology

The invention provides a single-phase two-tube five-level rectifier based on a hybrid H bridge. The rectifier comprises a switching tube Q1 and a switching tube Q2, one side of an alternating currentpower supply Vs is connected with the anode of a diode D1 and the cathode of a diode D2, and the connection node forms an end point b; the connection nodes of the other end of an inductor L and diodesD3, D4, D5 and D6 form end points a; the connection nodes of the drain electrode of the switching tube Q1 and the diodes D1, D3 and D7 form end points c; the connection nodes of the source electrodeof the switching tube Q1 and the diodes D2, D4 and D8 form end points d; the anode of the diode D8 is connected with the negative electrode of a capacitor C2 to form an end point m; the anode of the diode D11, the cathode of the diode D12 and the positive electrode of the capacitor C2 are connected with the negative electrode of a capacitor C1 to form an end point n; the cathode of the diode D7 isconnected with the positive electrode of the capacitor C1 to form an end point p. The end point a, the end point c, the end point d and the end point n form four ports of the hybrid H bridge. The rectifier has the advantages of being high in output direct-current voltage, small in harmonic content, low in switching tube stress, easy to control and the like.

The invention relates to improvement on an inverted umbrella-shaped aeration machine of a surface aeration apparatus for sewage treatment. The inverted umbrella-shaped aeration machine is characterized in that a rotary shaft is in a hollow structure, and at least the aeration is carried out in the water through an air distributing tube or a micropore aeration device in a terminal area, so that the inverted umbrella-shaped aeration machine is oxygenated by the swathed air generating whirl through rotation and oxygenates water by more air forcibly injected air, and the injected air is rotated through an impeller to stir and cut bubbles aerated into the water, particularly, the bubbles are cut through a sawtooth to ensure that the bubbles are finer to form micro-bubbles, thereby greatly improving the oxygenate capacity and the dissolved oxygen concentration of the inverted umbrella-shaped aeration machine and the deep oxygenation of the water body.

The invention relates to a one-time programmable memory based on a variable-resistance memory and a preparation method thereof, belonging to the technical field of microelectronic manufacture and thememory. The one-time programmable memory comprises the variable-resistance memory with the characteristic of bipolar conversion and a diode with the rectification characteristic which are connected inseries. The one-time programmable memory based on the variable-resistance memory adopts the diode with the rectification characteristic as a gating unit, adopts the variable-resistance memory with the characteristic of bipolar conversion as a memory unit, connects the diode and the variable-resistance memory in series, not only has simple structure, easy integration, high density and low cost, but also has rectification function when in low impedance state, can restrict read crosstalk in a crossed array structure, avoid misreading, can adopt integration of the crossed array structure and canrealize higher memory density.

A single-phase five-level power factor correction circuit based on a hybrid H bridge comprises switching tubes Q1, Q2 and Q3. One side of an alternating-current power supply Vs is connected with an anode of a diode D1 and a cathode of a diode D2, and a connection node forms an end point b. The other side of the alternating-current power supply Vs is connected with one end of an inductor L, the other end of the inductor L is connected with the anode of a diode D3 and the cathode of a diode D4, and connection nodes form an end point a. The drain electrode of the switching tube Q3 is connected with the cathode of the diode D1, the cathode of the diode D3, the anode of the diode D7, the drain electrode of the switching tube Q1 and a connection node to form an end point c. The source electrodeof the switching tube Q3 is connected with the anode of a diode D2, the anode of a diode D4, the cathode of a diode D8 and the source electrode of a switching tube Q2, and the connection node forms anend point d. The source of the switching tube Q2 is connected with the drain of the switching tube Q1, and the connection node forms an end point n. The cathode of the diode D7 is connected with oneend of the capacitor C1, and a connection node forms an end point p. The negative electrode of the capacitor C2 is connected with the anode of the diode D8 and the connection node forms an end point m. And the endpoint a, the endpoint c, the endpoint d and the endpoint n form four ports of the hybrid H-bridge network structure. The circuit structure has the advantages of low cost, high reliability, simple control system design and the like.

The invention relates to a single-phase three-level power factor correction rectifier based on asymmetric four ports. The rectifier comprises an alternating-current power source AC, an inductor L, switching tubes (Q1, Q2, Q3 and Q4), diodes (D1, D2, D7, D8, D9 and D10), and capacitors (Cdc1 and Cdc2); one side of the alternating-current power source AC is connected with the anode of the diode D1 and the cathode of the diode D2, and the connection node of the alternating-current power source AC, the diode D1 and the diode D2 form an end point b; the other side of the alternating-current power source AC is connected with one end of the inductor L; the other end of the inductor L is connected with the source electrode of the switching tube Q3 and the drain electrode of the switching tube Q4,and the connection node of the inductor L, the switching tube Q3 and the switching tube Q4 form an end point a; the drain electrode of the switching tube Q3 is connected with the cathode of the diodeD1 and the anode of the diode D8, and the connection node of the switching tube Q3 and the diode D8 forms an end point c; the source electrode of the switching tube Q4 is connected with the anode of the diode D2 and the cathode of the diode D7, and the connection node of the switching tube Q4, the diode D2 and the diode D7 forms an end point d; the cathode of the diode D8 is connected with one endof the capacitor Cdc1, and the connection node of the diode D8 and the capacitor Cdc1 forms an end point p; the other end of the capacitor Cdc1 is connected with one end of the capacitor Cdc2, and the connection node of the capacitor Cdc1 and the capacitor Cdc2 forms an end point n; and the other end of the capacitor Cdc2 is connected with the anode of the diode D7, and the connection node of thecapacitor Cdc2 and the diode D7 forms an end point m. The topological structure of the rectifier can adopt a multi-carrier modulation mode to control different circuit modes.

The invention relates to a one-time programming memory and a manufacturing method thereof, belonging to the technical field of microelectronics. The one-time programming memory comprises a lower electrode, an upper electrode and a functional layer film positioned between the upper electrode and the lower electrode; the contact between the upper electrode and the functional layer film or between the lower electrode and the functional layer film forms rectification characteristics. The manufacturing method of the one-time programming memory comprises the steps: forming a substrate as the lower electrode; forming the functional layer film on the substrate; photoetching on the functional layer film and depositing conducting material to form the upper electrode after peeling-off; forming rectification characteristics in virtue of the contact between the upper electrode and the functional layer film or between the lower electrode and the functional layer film. The invention lowers manufacturing cost of the memory and is advantageous for integration and usage of the memory; memory devices can be integrated in a structure of cross array, thus enhancing density of the memory; the memory itself has the effect of rectification and no need of additional rectifying devices, thereby eliminating influence on the memory by the additional rectifying devices and prohibiting read crosstalk.

The invention provides a combustor. The combustor comprises a shell, a draught fan, a burner head and an ignition mechanism, and an air inlet of the shell and the input end of the burner head form a pressure equalizing cavity; the ignition mechanism is arranged at the output end of the burner head, and the burner head comprises a main frame body and at least one stable combustion isolation belt; the interior of the main frame body is divided into at least two ventilation areas in the direction of a gas channel through the stable combustion isolation belt; a plurality of separation mechanisms are arranged in each ventilation area, and the ventilation areas are divided into a plurality of through holes distributed in the direction of the gas channel through the separation mechanisms; and thethrough holes are used for allowing mixed gas to pass through and strengthening the mixing effect of the gas and air, and combustion flame of the combustion face of the main frame body can be dividedinto independent flames through the stable combustion isolation belt. According to the combustor, the power of a combustion component can be changed with the area of the combustor, and fuel gas and air are highly and evenly mixed after entering micropore channels, and ignited to form even premixed flame after being sprayed out from the micropore channels; and the flames are independent through arrangement of the isolation belt, and the flames are stable, clean and efficient.

The invention provides a single-phase power factor correction circuit based on three-tube five-level topology. The circuit comprises switching tubes Q1, Q2 and Q3, one side of an AC power supply is connected with the anode of a diode D1 and the cathode of a diode D2, and the connection nodes form an end point b; the other side of the AC power supply AC is connected with one end of an inductor L, and the other end of the inductor L is connected with the anode of a diode D3 and the cathode of a diode D4 and the connection nodes form an end point a; the cathode of the diode D7 is connected with one end of a capacitor C1, and the connection node forms an end point p; the other end of the capacitor C1 is connected with one end of a capacitor C2, and the connection node forms an end point n; theother end of the capacitor C2 is connected with the anode of the diode D8, and the connection node forms an end point m; the drain electrode of the switching tube Q1 is connected with the cathode ofthe diode D1 and the anode of the diode D7 respectively, and the connection node forms an end point c; the source electrode of the switching tube Q3 is connected with the anode of the diode D2 and thecathode of the diode D8, and the connection node forms an end point d. The end point a, the end point c, the end point d and the end point n form four symmetrical ports. The correction circuit adoptsmultiple levels so as to have the advantage that the voltage stress of the switching tube is low.

The invention relates to the technical field of remote sensing surveying and mapping auxiliary devices, in particular to an auxiliary device capable of improving remote sensing image surveying and mapping precision, which comprises an unmanned aerial vehicle, the bottom end of the unmanned aerial vehicle is fixedly connected with a fixed shell, the bottom end of the fixed shell is fixedly connected with a bottom plate, and a surveying and mapping camera is mounted at the center of the bottom surface of the bottom plate. According to the unmanned aerial vehicle, through the arrangement of the bottom plate and the spherical shell, the spherical shell protects the surveying and mapping camera, the surveying and mapping camera is prevented from being blown by transverse airflow, dust is effectively prevented from entering the surveying and mapping camera, meanwhile, wind resistance is reduced, and the unmanned aerial vehicle can be conveniently kept stable in the air; and through arrangement of the two protective plates, an annular plate and a driving rod, when the unmanned aerial vehicle drives the surveying and mapping camera to descend, the two protection plates are automatically closed under wind pressure to shield the surveying and mapping camera and prevent dust from entering a lens of the surveying and mapping camera, and when the unmanned aerial vehicle hovers in the air to prepare for shooting, the two protection plates are automatically opened towards the two sides to expose the lens of the surveying and mapping camera, and shooting is convenient.

The invention provides a gas stove. The gas stove comprises a draught fan, an inner ring burner housing, an outer ring burner housing, a gas distribution mechanism, an adjusting valve, burner heads and an igniter, wherein the gas distribution mechanism is used for distributing gas in the inner ring burner housing and the outer ring burner housing; an inner ring burner adopts gas injection type diffusion combustion; an outer ring burner adopts active air supply premixed combustion; the burner head of the outer ring burner comprises a main frame body and at least one stable burning isolation belt; the stable burning isolation belt divides the interior of the main frame body into at least two ventilation areas in the direction of a gas channel; a separation mechanism is arranged in each ventilation area and divides the ventilation area into a plurality of through holes distributed in the direction of the gas channel; the through holes are used for allowing premixed gas to pass through andstrengthening the mixing effect of the premixed gas and the through holes; and the stable burning isolation belt can divide burning flames on the burning face of the main frame body into mutually independent flames. According to the gas stove, the mixing degree of gas and air can be enhanced by the micropore structure, so that the burning is more sufficient, and the pollutants are few.

The invention discloses a high-temperature, high-pressure and high-flow-velocity H2S/CO2 moisture environment corrosion simulation loop system. The loop system comprises a high-temperature and high-pressure kettle and a loop pipeline; an inlet and an outlet of the loop pipeline are communicated with the high-temperature and high-pressure kettle to form a loop system; the loop pipeline comprises ahigh-flow-velocity test section and a low-flow-velocity test section, and the high-flow-velocity test section is close to the gas phase outlet end of the high-pressure and high-temperature kettle; andaxial flow fans, Laval tubes with heating coils, gas flowmeters, corrosion probes, thermocouples, thermoelectric refrigeration devices, corrosion monitoring sections and sample mounting sections arearranged in the high-flow-rate test section and the low-flow-rate test section. The simulation loop system can accurately simulate the real corrosion environment in the submarine natural gas pipeline,such as temperature, pressure, flow velocity, pipeline top condensation and the like, and has the functions of corrosion electrochemical monitoring and physical coupon mounting; and the method has important significance for researching the corrosion law and mechanism of the submarine pipeline material and evaluating the applicability of the anti-corrosion agent.

The invention discloses a direct-current droplet generator and a preparation method thereof. The generator is characterized in that the generator has a structure in which all electrodes are placed above a solid surface and do not need to be grounded, so that the direct-current liquid drop generator can be constructed on any surface including a block body, a thin film and a coating; the droplet generator structure comprises a solid hydrophobic surface, an upper electrode, a collector pin, a lower electrode, an upper electrode lead and a lower electrode lead. The solid surface is a hydrophobic surface made of any artificial or natural materials, the upper electrode and the lower electrode are placed on the solid surface at a certain interval, the current collecting needle can be of an independent conductive tip structure and can also be directly machined on the electrode, and the generator can collect electric energy by impacting the surface through liquid drops. Compared with the prior art, the direct-current droplet generator can be constructed on any solid surface, the collected liquid mechanical energy is converted into the electric energy with the direct-current characteristic, and the direct-current droplet generator has the advantages of being simple in preparation process and low in cost. The open-circuit voltage of the direct-current liquid drop generator is up to kilovolt, a power management circuit is not needed, and the direct-current liquid drop generator can directly drive micro electronic devices to work or charge an energy storage unit. The structure of the direct-current generator has the functions of power generation, rectification and energy storage at the same time, a new technology based on solid-liquid interface water energy collection is developed, and the practical progress of water energy collection is greatly accelerated; meanwhile, the device is also a sensor or a probe. Due to the fact that the device achieves effective separation of charges, the device has extremely high application value in the aspects of droplet energy collection and self-driven sensing.

The invention relates to a framework device for wind collection power generation of a direct-drive accelerated type narrow tube. The framework device comprises a hub type component. One end of the hub type component is fixedly connected with the inner ring of a swing bearing. The other end of the hub type component is fixedly connected with one end of a tubular support. A tubular supporting hoop is arranged on the periphery of the tubular support in a matched manner. One end of the tubular supporting hoop is fixedly connected with a reinforced composite bridge through a gasket and a fastener. One end of a double-rail structure frame is fixedly connected with the tail portion of the reinforced composite bridge, and the other end of the double-rail structure frame is connected with the hub type component in a clamping manner. The end, connected with the hub type component, of the tubular support penetrates the reinforced composite bridge. According to the framework device, damage possibly caused by turbulent flow and gust vibration in the whole machine operation process is avoided, the key function is achieved on decomposing and eliminating of gravity loads, and the framework device is as firm as a rock even in severe wind conditions; and the framework device effectively adapts to application and popularization of large-power wind generation type wind power generators in the future.

The invention relates to a full-power speed increasing type impeller and framework system. The full-power speed increasing type impeller and framework system comprises an impeller speed increasing system, an electric generator and a framework system. The impeller speed increasing system converts external wind energy into rotating kinetic energy and transmits the kinetic energy to the electric generator; and the electric generator converts the kinetic energy into electric energy to be systematically output. According to the system, incompleteness of an existing narrow pipe wind gathering and electricity generating technology is improved, a direct drive speed increasing type impeller mechanical structure is improved in a conquered manner, and compatibility, safety reliability, stability and service life of an enhanced type composite bridge type rigid crosslinking installation platform structure system are further included, the size, weight and cost of the electric generator are reduced, and the full-power speed increasing type impeller and framework system can be suitable for the industrial requirements of development of the wind power course in the future.

The invention relates to a bipolar pre-charging device with single power supply transverse rod. According to the technical scheme, the device comprises a pre-charging electric appliance, a dust remover and an air inlet box and air outlet box which are arranged at the two ends of the device. A plurality of cathode rod frames and anode rod frames are vertically, uniformly and alternately arranged inthe pre-charging electric appliance along an air flow direction; a plurality of cathode corona wires and cathode tube groups are alternately and uniformly arranged on the cathode rod frames, and a plurality of anode corona wires and anode tube groups are alternately and uniformly arranged on the anode rod frames; the cathode corona wires and the adjacent anode tube groups form a negative electricfield, and the anode corona wires and the adjacent cathode tube groups form a positive electric field; the cathode rod frames are connected with the high-voltage output end of a high-voltage direct current power supply through a high-voltage cable, and the anode rod frames are connected with a grounding electrode of the high-voltage direct current power supply through a grounding cable. The device aims at providing a single power supply bipolar pre-charging device which can simultaneously achieve dust pre-charging and electrostatic coagulation, is easy in removing ash and has high purification efficiency on fine matters.