63results about How to "Realize rectification" patented technology

The invention discloses a novel two-stage bidirectional energy storage converter control system and a control method thereof. An energy storage converter main circuit mainly comprises a three-phase voltage type PWM (Pulse Width Modulation) rectifier, a novel half bridge three-level push-pull bidirectional DC-DC converter, a charging-discharging buffer interface circuit for limiting battery charging current, and a battery pack module. A control system circuit mainly comprises a voltage and current sensor, a driving circuit, a protection circuit, a main controller, an SOC (State of Charge) detection module, a radiator, a buzzer, a man-machine interface, a communication interface circuit and a system auxiliary power supply. The alternating-current micro-grid power or voltage and the states of charge of energy storage batteries can be detected in real time, so that the running modes of each generating set and the energy storage converter in a micro-grid system are controlled flexibly, and the effects of 'filling peaks and clipping valleys' in a power system, smoothening power in a wind-solar hybrid micro-grid system and the like are achieved. Moreover, the control system has the advantages of high power density, small size, high efficiency, low harmonic content, high reliability, high self-control degree and the like.

The invention relates to a production method of an integrated light-emitting diode array chip based on a gallium-nitride-based light-emitting diode. The production method comprises the following steps of: arranging 9 or 12 light-emitting diode units in an array manner to form a 3*3 or 3*4 matrix, and integrating the matrix in a chip; in the integrated chip, etching an insulating sapphire substrate layer through an etching technology to completely separate gallium nitride layers among the units; filling gaps among the units by using an insulating material, and covering the whole chip; opening electrode ports of the units on an insulating layer; connecting the electrode ports of the units in a metal evaporation manner so that the units in the whole chip form a circuit in a serial connection manner; and making P and N routing disc ports at both ends of the chip for accessing other circuits when the capsulation is carried out. The integrated chip produced by the production method has the advantages of high light-emitting strength and high photoelectric conversion efficiency and is beneficial to the capsulation and the design of a drive circuit. The production method is mainly applied to an illumination field.

The invention discloses a mine storage battery electric locomotive mounted charging and driving integrated circuit structure. The structure mainly comprises a storage battery, a supercapacitor, a first DC-DC converter, a second DC-DC converter, an inverter circuit and a driving motor; one end of the first DC-DC converter is connected with the storage battery in series, the other end of the first DC-DC converter is connected with the inverter circuit in parallel, one end of the second DC-DC converter is connected with the supercapacitor in series, the other end of the second DC-DC converter isconnected with the inverter circuit in parallel, and the output end of the inverter circuit is connected with the driving motor in series. When a mine storage battery electric locomotive is in the traction driving state, the storage battery and the supercapacitor supply power to the electric locomotive; when the mine storage battery electric locomotive is in the parking charging mode, the drivingmotor and the inverter circuit form a charging circuit of the electric locomotive. The problem that mine storage battery electric locomotive offline charging equipment is huge and low in charging efficiency is solved, and the mine electric locomotive charging and operation efficiency can be improved.

The invention discloses a dead-zone-free three-phase AC/DC converter with a high-frequency rectifier bridge, belonging to the field of three-phase AC/DC converters. The invention particularly relates to a dead-zone-free three-phase converter topological structure, aiming at being applied to a medium-power and high-power occasions. The dead-zone-free three-phase AC/DC converter reduces the current harmonic content at an AC side and decreases the specification of a filter under the condition of adopting a space vector control algorithm which is the same as that adopted by the traditional three-phase bridge-type converter and can realize bidirectional flow and natural switching of energy without extra switching loss. The dead-zone-free three-phase AC/DC converter comprises a DC-side support capacitor, a three-phase upper bridge arm power transistor, a three-phase lower bridge arm power transistor, a three-phase upper bridge arm freewheel diode, a three-phase lower bridge arm freewheel diode, a three-phase high-frequency rectifier bridge, a three-phase first straight-through prevention filtering inducer and a three-phase second straight-through prevention filtering inducer. The dead-zone-free three-phase AC/DC converter solves the problems of straight-through problem of the bridge arm power transistor of the traditional three-phase voltage source bridge-type converter and the problems of the double voltage reduction type converter which needs to shield redundant switching signals for reducing extra switch loss and zero crossing point distortion.

The invention discloses a tone regulation and control circuit based on a NE5532 chip; the tone regulation and control circuit comprises the following parts: a pre-stage amplification circuit with twoinput ends respectively connected with a left channel audio signal and a right channel audio signal, the pre-stage amplification circuit comprises an amplifier U1A and an amplifier U1B, the amplifierU1A and the amplifier U1B are integrated in the NE5532chip, and respectively are used for amplifying the left channel audio signals and the R channel audio signals; a tone control circuit with two input ends respectively connected with output ends of the amplifier U1A and the amplifier U1B, the tone control circuit is used for respectively adjusting low pitch, middle pitch and high pitch for the two paths of audio signals amplified by the amplifier U1A and the amplifier U1B; a volume adjusting circuit used for adjusting volumes of the two paths of audio signals. The tone regulation and controlcircuit can better amplify, rectify and filter sounds and make fidelity treatment, and can remove unnecessary interferences, thus further obtaining better sound quality.

The invention discloses a flow scattering device which is arranged on a water distribution pipeline. The flow scattering device comprises a pipeline nozzle and a flow scattering body. The pipeline nozzle is connected with a water distribution hole in the water distribution pipeline. The flow scattering body comprises an outer layer and an inner layer, and the outer layer is fixedly connected with the inner layer through a connection pillar and a clamping groove, wherein the connection pillar and the clamping groove are mutually matched. In addition, the flow scattering body is divided into two segments, one of the segments is a spherical face portion, and the other segment is a radial disc face portion. The pipeline nozzle is connected with the spherical face portion of the outer layer, and a fluid passes through the pipeline nozzle and is scattered through the seam of the inner layer and the outer layer of the flow scattering body. The flow scattering device can be installed on water distribution pipelines of various water distribution devices (such as an eight-square water distribution device and a linear water distribution device). The flow scattering device is simple in structure, not prone to blocking, and capable of effectively increasing the water distribution length and reducing the flowing speed of a water distribution opening.

The invention discloses an active power decoupling device without an additional switching element and a control method therefor. The active power decoupling device is achieved by increasing two additional energy storage capacitors in the topological structure of a conventional single phase current source converter. During each power frequency period, the energy storage capacitors work by turns to complete absorption and release of inherent secondary pulse power of the single phase current source converter. Compared with a conventional active decoupling device, the active power decoupling device provided by the invention requires no additional switching element, thereby helping reducing the system cost and improving the system efficiency. Direct current of the active power decoupling device is timely corrected by a decoupling circuit, and the mean value of voltage of a decoupling capacitor is maintained constant by a rectifier state circuit. The system control is not dependent on accurate system parameters, and the robustness is strong. Only a simple PI controller is required to achieve rapid and error-less tracking of a target, and the controller is easy to design.

The invention discloses a three-phase active power factor rectification method for realizing the three-phase power factor correction and the three-phase input current harmonics reduction, which comprises the following steps: obtaining an input current average value of two-phase in the n-th PWM period; regulating the obtained control parameter via a PI based on the output voltage; calculating the equivalent rated load resistance on each phase AC side, the equivalent rated load resistance on each phase AC side in the rated power and the duty cycles of three bidirectional switches in the next PWM control period, finally outputting three bidirectional switch duty cycle control signals to control three corresponding bidirectional switches by a DSP control system at the beginning of the next PWM control period. The invention adopts a DSP (Digital Signal Processor) as the control core to realize the three-phase active power factor rectification without an input voltage sensor approaching to the unity power factor.

The invention relates to a rectifier used in a non-contact tag chip, in particular to a CMOS (Complementary Metal-Oxide-Semiconductor Transistor) rectifier. The CMOS rectifier comprises a CMOS rectifier module, a biasing module and a clock signal generation module. The CMOS rectifier can be realized by adopting a common CMOS tube in a standard CMOS process, is suitable for a passive radio frequency identification tag chip, avoids using special appliances such as a Schottky diode and the like and depending on a certain special process, and can effectively lower the cost of the passive radio frequency identification tag chip.

The invention discloses a four-quadrant cascade high-voltage frequency conversion device, which comprises a transformer, three single-phase electric reactors and three groups of power module units, wherein a secondary side of the transformer is provided with three single-phase windings; each group of power module units consists of N module units; each power module unit consists of two identical controllable H-bridge circuits; two input ends and two output end are respectively formed through the two H-bridge circuits; in the same power module unit, the input ends of the power module unit are connected in sequence, and output ends of each power module unit are connected in sequence; and two power modules at the head and the tail are connected with single-phase secondary windings of the transformer. Bidirectional flow of energy between a power grid and a load is realized, the high voltage resistance of the whole frequency conversion device is realized, the defect that a plurality of secondary side windings are adopted in prior art is overcome, and the usage of electric reactors is greatly reduced, so that the whole high-voltage frequency conversion device is relatively simple in structure, low in manufacturing cost, small in volume, heavy in weight and convenient to transport, mount and maintain.

The invention discloses a network security emergency disposal system based on a recurrent neural network model, and the system comprises the following modules: a management center module which is used for carrying out system management and completing the connection and calling of each module; a knowledge database module which is used for storing risk data and expert knowledge data and regularly updating the data; a data acquisition module which is used for monitoring and acquiring network data in real time; a risk detection tool module which is used for carrying out security detection on the network data and carrying out detection and classification on abnormal data; a risk analysis and processing module which is used for analyzing, matching and processing the abnormal data; a data protection module which is used for protecting local data after abnormal data is detected; and a remote connection auxiliary module which is used for realizing remote assisted processing of the security event. The invention has the beneficial effects that the risk database is utilized to construct the recurrent neural network model, so that the risk can be conveniently rectified and corrected in time, and the process of emergency processing vulnerability detection and rectification is greatly reduced.

The invention discloses a CO boiler-flue gas denitration reactor integrated unit. According to the CO boiler-flue gas denitration reactor integrated unit, a CO boiler and a denitration reactor are arranged in parallel; the CO boiler comprises a first vertical flue, a horizontal flue, and a second vertical flue; an evaporation zone is arranged on the internal upper part of the second vertical flue; the denitration reactor is communicated with the second vertical flue via an inlet flue and an outlet flue; dedusting grilles are arranged below the evaporation zone, and is opposite to an inlet of the inlet flue of the denitration reactor; a dust collecting plate is slantly arranged below the dedusting grilles; a part of the flue wall near the lowest part of the dust collecting plate is provided with a dust outlet; the outlet flue of the denitration reactor is connected with the second vertical flue below the dust collecting plate; and a coal economizer is arranged below the outlet flue. The CO boiler-flue gas denitration reactor integrated unit is capable of realizing denitration of flue gas without influencing recycling of CO boiler flue waste heat, achieving preferable utilization of flue gas waste heat, increasing heat urilization efficiency, and reducing investment.

Provided is a flow control valve that can effectively reduce the generation of noise due to fluctuations in the pressure or a refrigerant separation phenomenon that may occur while a refrigerant passes through the valve orifice, and also reduces the pressure loss and the like. The flow control valve (1) includes a valve body (5) including a valve chamber (6) and a valve orifice (10); and a valve element (30) with a curved surface portion (33) adapted to change the flow rate of a fluid through the valve orifice (10) in accordance with the lift amount of the valve element (30), the curved surface portion (33) having a curvature or a control angle that is increased continuously or in stages toward the tip end of the curved surface portion (33). The orifice diameter of the valve orifice (10) is sequentially increased in four or more stages in a direction away from the valve chamber (6). Further preferably, V2 > V4 > V3 > V1, where the volumes of the first valve orifice portion (11), the second valve orifice portion (12), the third valve orifice portion (13), and the fourth valve orifice portion 14 are V1, V2, V3, and V4, respectively.

The invention discloses a train phase separation passing converter comprising a base and multiple unit cabinets. Multiple unit cabinets are arranged on the base in parallel. Each unit cabinet comprises a cabinet body, an electric control component, a power module component, a support capacitor, a discharge resistance component, a contactor component, a resonance capacitor and a wiring component. Multiple support beams are arranged in the cabinet body. The electric control component, the power module component, the support capacitor and the electric control component are sequentially installedon the support beams of the cabinet body from top to bottom. The resonance capacitance and the electric control component are installed side by side and located on the rear side of the cabinet body. The discharge resistance component is installed on one side of the cabinet body in front of the contactor component. The wiring component is installed on the rear side of the contactor component. The train phase separation passing converter has the advantages of simple and compact structure, reasonable layout, good expansion performance, good heat dissipation performance and the like.

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 discloses a tail gas purification system and method for recycling smoke waste heat. The system comprises a connecting water pipe, an inlet flue, a washing tower, a hot water storage tankand a hot water pump. A raw smoke heat taker is arranged in the inlet flue, a smoke inlet is formed in the tower wall of the washing tower, a smoke outlet is formed in the top of the washing tower, and a pipe grid layer, a washing and spraying layer, a desizing layer, a liquid receiving layer and a demisting heat taking layer are sequentially arranged in the position, between the smoke inlet andthe smoke outlet, of a tower body of the washing tower from bottom to top. The demisting heat taking layer, the pipe grid layer and the raw smoke heat taker are sequentially connected in series through water pipes. Smoke waste heat is recycled stage by stage through the raw smoke heat taker, the pipe grid layer and the demisting heat taking layer, and waste heat of low-grade industrial tail gas ina tail gas purification tower can be effectively reused.

The invention belongs to the field of gas compressor design, and relates to an adjustable stator blade and casing structure, the adjustable stator blade and casing structure comprises an adjustable stator blade, an inner casing and an outer casing, the inner casing and the outer casing are connected with a blade-shaped support plate, a rotating shaft is mounted in a through hole of the blade-shaped support plate, and outer culvert airflow only contacts with the blade-shaped support plate and does not contact with the rotating shaft, so that the rotating shaft is not contacted with the blade-shaped support plate; when the angle is adjusted, power is transmitted to the rotating shaft through the angle adjusting mechanism, the rotating shaft is located in the through hole and is only influenced by the angle adjusting mechanism so as to drive the blade body to rotate, the angle of the blade body can be adjusted, the rectification effect on inner culvert airflow is achieved, and the rotating shaft of the adjustable stator blade is isolated from outer culvert airflow; according to the adjustable stator blade, the interaction between the rotating shaft and external duct airflow is eliminated, meanwhile, the collision and abrasion problem of the rotating shaft is avoided, the mechanical resistance moment of the adjustable stator blade is in a stable state, and the adjusting precision of the adjustable stator blade is guaranteed.

The invention discloses an oil separation device, a compressor and a vehicle with the compressor. The oil separation device comprises a first shell, a second shell and an oil separation insertion pipe, wherein the first shell is internally provided with a first chamber, and the first shell is provided with a first air inlet communicating with the first chamber; the second shell is arranged on the first shell, the second shell is internally provided with a second cavity, the inner wall of the second cavity is provided with a second air inlet, and the second cavity is provided with an oil discharge opening; and the oil separation insertion pipe is arranged in the second cavity, and an exhaust channel communicating with the second cavity is arranged in the oil separation insertion pipe. According to the oil separation device, the air flow noise is reduced, oil-gas separation and oil recovery are realized, the structure is simple, the occupied space is small, so that when the oil separation device is applied to the compressor, the design of miniaturization, low noise and low oil discharge capacity of the compressor can be realized.