70results about How to "Efficiency does not decrease" patented technology

The invention belongs to the technical field of integrated circuits and specifically relates to a high mains rejection ratio low dropout voltage linear voltage regulator with a feedforward transconductance, which consists of an error amplifier, a buffer, a PMOS pass transistor, a feedforward transconductance, two feedback resistors and a filter capacitor, wherein the error amplifier is a current mirror amplifier consisting of a tail current source, a PMOS input differential pair and three groups of current mirrors. The mains voltage fluctuation influences the output mainly via two paths of the PMOS pass transistor and the parasitic resistor of and PMOS pass transistor. The feedforward transconductance transforms the perturbation of the mains voltage into the perturbation of the current, and then the perturbation of the current is transformed into the in-phase voltage perturbation of the grid of the pass transistor via the parasitic resistor of the error amplifier. The influence of the mains voltage perturbation on the output can be eliminated by the control of the gain of the feedforward transconductance so as to realize high mains rejection ratio. The invention can optimize the mains rejection ratio within a wider range of load current and does not reduce the efficiency of the low dropout voltage linear voltage regulator.

The utility model discloses a combustion device for a tangentially fired boiler and an ultralow NOx combustion method employing same. A high-position burner, a low-position burner and a main burner are arranged on a hearth from top to bottom; the space between the low-position burner and the main burner is H2, the main burner comprises dense-dilute primary air pulverized coal burners and secondary air pulverized coal burners arranged at the upper parts and the lower parts of the dense-dilute primary air pulverized coal burners, wherein the secondary air pulverized coal burners correspond to secondary air nozzles, the dense-dilute primary air pulverized coal burners are bifurcated pipes, light-phase primary air nozzles and dense-phase primary air nozzles are arranged at the front ends of the bifurcated pipes respectively, and middle secondary air nozzles are arranged between the light-phase primary air nozzles and the dense-phase primary air nozzles; and the main burner comprises an upper group of burners and a lower group of burners, and the space between the upper group of burners and the lower group of burners is H1. The characteristic of divided layer blowing in the horizontal direction is reflected, mixing the secondary air is delayed, the purpose of supplying air on the same layer by grading is achieved, mixing O2 is delayed, the production of NOx is inhibited, and the efficiency of the boiler is ensured not to be reduced.

The invention provides a built-in permanent magnet motor rotor structure, which comprises a rotor plate (1) and a plurality of magnetic slots (2), wherein the plurality of magnetic slots (2) are arranged in the rotor plate (1) for placing magnetic bodies (3); two polar arc angles of magnetic poles under a pair of poles of the rotor structure are defined as a first polar arc angle alpha and a second polar arc angle theta; the first polar arc angle alpha is divided into alpha1 and alpha2 by a center line of the magnetic pole; the second polar arc angle alpha is divided into theta1 and theta2 by the center line of the magnetic pole; under the pair of poles, at least one pole meets the formula: theta1 is not equal to theta2 or alpha1 is not equal to alpha2; and one pair of poles is the poles formed by the magnetic bodies in two adjacent magnetic slots. Through the built-in permanent magnet motor rotor structure, applied moments of the magnetic poles and stator tooth sockets are partially offset; the tooth socket torques and torque ripples are effectively reduced; meanwhile, the running stability and reliability of an original motor can also be maintained or improved; and the efficiency of the motor is not reduced. The invention further relates to a motor with the rotor structure.

The present invention discloses one kind of ultrasonic wire welding method and apparatus. The welding apparatus includes two locating optical imaging systems with optical lens set and camera; and two horizontal turntables on the X-Y work benches with two exchangeable work sites each. When one of the two horizontal turntables locates under one of the two locating optical imaging systems, the other welds in the other optical imaging systems, and the course is exchanged and repeated. The present invention has raised LED wire welding efficiency, and increased IC chip wire welding area.

The invention discloses a synchronous rectification implementation method. The synchronous rectification implementation method includes: connecting a synchronous rectification tube with two ends of a rectification diode in parallel, detecting the forward conduction time t1 of the synchronous rectification tube and the rectification diode, subtracting a short time td from t1 to obtain a second time t2, using t2 to control the conduction of the synchronous rectification tube at least in the next cycle, as shown in the figure 17a, after stopping the synchronous rectification tube, enabling the rectification diode to finish the rectification for the section 17b, wherein the efficiency of the machine is rarely influenced. Through repeating the steps, a large synchronous transformer for isolation is omitted, and the application is simple; the synchronous rectification implementation method is suitable for different types of switching power supply topology, is capable of automatically adapting to the synchronous rectification under CCM and DCM, and is avoided from flowing backward.

A centrifugal compressor case belongs to the field of compressor; the compressor case is provided with an annular gas collection trough and a plurality of through holes, wherein the through holes are located in the connecting surface between the compressor case and a centrifugal compressor impeller and are vertical to the inlet annular plane of the compressor case, and the annular gas collection trough is located below the internal centrifugal compressor impeller of the compressor case and is vertical to the axis of the through holes. The invention can adaptively control the regurgitant volume to enlarge the stable work area of the centrifugal compressor under the condition of not reducing the efficiency of the original machine set, thus avoiding the occurrence of surging phenomenon caused by flow instability.

This invention provides a paper money transaction device and a automatic transaction device with the same, hence, solving the problem that the paper money delivery fault may be happened frequently during high speed delivery cource. A paper money managing table (40) is used for managing, controlling the accepting condition of the paper money with different face value in money collecting box (25) . For the high possibility that the money being put into the box may be abnormally separating, collecting and delivering due to certain fold and crease phenomenon, the separating, collecting and delivering process are performed in a low speed, therefore the whole process may go on steadily with low fault rate. Furthermore, the separating and delivering process may be operated in a high speed for the reason that the complemented paper money usually has not been damaged, stained, deformed, etcs. , and the time is saving.

The invention provides a motor rotor and a motor having the motor rotor and a compressor. The motor rotor comprises a rotor iron core which is provided with magnet slots used for placing magnets. The magnet slot of each pole of the motor rotor comprises a first magnet slot. The first magnet slot is provided with a first slot wall and a second slot wall. The first slot wall is arranged at the radially external side relative to the second slot wall. The two ends of the first slot wall are provided with first cut corners. The radial distance d from the internal vertex of the first cut corners to the excircle of the rotor iron core meets 3*delta<=d<=7*delta, wherein delta is the air gap width between the motor rotor and the matched stator. According to the motor rotor, the motor tooth slot torque and torque ripples can be effectively weakened so that the electromagnetic force of the motor can be reduced, the vibration noise of the motor can be reduced and the operation stability and reliability of the motor can be enhanced.

The invention concerns a textile machine, in particular a spinning-preparatory machine, a device and a process for contactless measurement and/or adjustment of parameters between mutually opposite strips of card clothing (21, 25). The device comprises inter alia a voltage source (23) and a pulse generator (23a) for generating an alterable potential difference. The tips (22, 26) of the strips of card clothing (21, 25) are electrically conducting, and the pulse generator (23a) is connected to tips (22, 26) such that applying the alterable potential difference between tips (22, 26) of the two strips of card clothing (21, 25) makes it possible to generate at least two successive spark discharges. Means are provided for measuring the time between two spark discharges and/or a frequency measurement (28) for determining the current distance (d) between the card clothing tips (22, 26).

The invention discloses a grinding solution and a preparation method thereof. The grinding liquid is used for batch processing of semi-conductor material chips of novel silicon wafers, silicon chips and the like. The grinding solution comprises, by weight, 10%-30% of grinding sands, 3%-8% of an anti-rusting lubricant, 0.5%-2% of a flotation reagent, 0.5%-3% of a moistening agent, 0.1%-1% of a suspending agent and 56%-85.9% of deionized water. The grinding liquid and the preparation method have the advantages that inorganic alkali is not needed, which is safe and protects the environment, the grinding efficiency is maintained under the condition that the performance of the grinding solution is not reduced, the grinding sands can uniformly act on the surfaces of the silica wafers or the silica chips in the grinding process, and therefore the long-term use of the grinding solution is achieved while the efficiency is not reduced.

The invention belongs to the technical field of sewage treatment, and in particular relates to a high-efficiency composite-enzyme treatment device and process for sewage. According to the high-efficiency composite-enzyme treatment device for the sewage provided by the invention, a composite enzyme is utilized to degrade degradable substances such as organic substances in the sewage, a porous cordierite honeycomb ceramic is used as a carrier, an enzyme preparation is supported on the porous carrier by utilizing an impregnation supporting method for immobilization, in the whole supporting process, impregnation supporting is performed under the condition of a selected ionic liquid, the ionic liquid plays a role of a crosslinking agent in addition to be used as a solvent, so that the enzyme preparation can be more stably supported in pores of the porous carrier, the immobilization effect is more excellent, and the immobilized enzyme can be used for a plurality of times without reducing theefficiency.

The invention discloses a broadband hybrid structure J-type power amplifier and a design method. The broadband hybrid structure J-type power amplifier comprises a biasing circuit, an input matching circuit, a hybrid structure harmonic control circuit and an output fundamental wave matching circuit. The input end of the hybrid structure harmonic control circuit is connected with the output end of atransistor, an open-circuit branch micro-strip transmission line and a step impedance conversion line are mixed, and a harmonic control mode is realized by selecting a plurality of frequency points.Therefore, second harmonic short circuit of corresponding frequency points and J-type power amplifier characteristics are realized. The output fundamental wave matching circuit is connected with the mixed harmonic control circuit and used for matching a load. By adopting the technical scheme of the invention, the bandwidth of the J-type power amplifier can be expanded while the efficiency is ensured by utilizing a new hybrid structure and a multi-frequency-point implementation mode.

An ultra-low-nitrogen gas burner is suitable for ultra-low-nitrogen gas burners of power plant boilers, industrial boilers and petrochemical heating furnaces. The ultra-low-nitrogen gas burner comprises an injecting nozzle, an air injector, a combustion-supporting air channel, a jet flow nozzle device, a mixing rotational flow device, an oxygen-rich combustion head and a reducing combustion head;the injecting nozzle is arranged at the center of the air injector; the air injector is arranged in the combustion-supporting air channel, and the front of the air injector penetrates the oxygen-richcombustion head and is connected with the reducing combustion head; the jet flow nozzle device is arranged on the outer side of the air injector in the combustion-supporting air channel, and is concentrically arranged with the air injector; the mixing rotational flow device is arranged on the jet flow nozzle device in a sleeving manner, is concentric with the jet flow nozzle device, and can move in the axial direction of the jet flow nozzle device; and a cylindrical structure is adopted for the oxygen-rich combustion head and the reducing combustion head, and the oxygen-rich combustion head and the reducing combustion head are concentrically arranged, and jointly form a combustion head of the ultra-low-nitrogen gas burner. Ultra-low nitrogen emission is achieved while the excess air coefficient is not added and the boiler efficiency is not lowered. The ultra-low-nitrogen gas burner is simple in structure and convenient to use.

The invention discloses a separation method of an LED lamp tube aluminum substrate. The LED lamp tube substrate is cut through two sets of cutters with different cutting gaps in sequence; and the gap of the first set of cutters is larger than the gap of the second set of cutters. The separation method has the following beneficial effects: (1) the cutting is performed by two steps; the incision is smooth; and the damage of the aluminum substrate is low; and (2) the two times of cutting are once finished, so that the efficiency is not reduced under the condition of improving the quality.

The invention relates to the field of sludge treatment and biomass utilization based on a coal-fired power plant boiler and provides a sludge/biomass treatment device and method of the coal-fired power plant boiler. The device comprises a feeding device, a storage tank, a drying and carbonizing and conveying integrated apparatus, a mill exhauster and a sludge/biomass burner which are sequentiallyconnected; a cylinderical pre-drying device is arranged above the interior of the storage tank, the upper end of the pre-drying device communicates with the feeding device and the lower end of the pre-drying device communicates with the storage tank; the upper part of the pre-drying device is connected with an upstream of an outlet flue of an air pre-heater of the coal-fired power plant boiler through a pipeline, and the upper part of the storage tank is connected with a downstream of the outlet flue of the air pre-heater through the pipeline; a plurality of steel balls are arranged in the drying and carbonizing and conveying integrated apparatus, and an inlet of the drying and carbonizing and conveying integrated apparatus is connected with an inlet flue of the air pre-heater through thepipeline; the sludge/biomass burner is arranged on a boiler furnace side wall or four corners of the coal-fired power plant boiler and is located in the same burning area of the boiler furnace as an OFA burner of the coal-fired power plant boiler.

The present invention relates to a substrate classification method. The present invention provides the substrate classification method which can perform classification without efficiency reduction at an occasion when the number of the kinds of the classified substrates is larger than the number of the classification opening and furthermore dose not require the flowing of the substrates from a conveying inlet when a box of a certain classification opening is full. A substrate classification device used for the substrate classification method comprises the following components: a conveying-in side buffer device which temporarily holds the substrates in a box provided at a conveying-in inlet; a conveying device which conveys the substrates held at the conveying-in side buffer device to a certain classification opening one by one; and conveying-out side buffer devices which are respectively provided at each classification opening and temporarily holds the substrates conveyed by the conveying device. Hereon, at least one in the conveying-out side buffer devices is a random access buffer device. In the substrate classification method, while a plurality of substrates are held in the random access buffer, the substrates are conveyed to different conveying-out boxes according to each kind.

The invention discloses a structural fuzzy uncertainty analysis method based on self-adapting matching points and belongs to the field of structural uncertainty analysis. Firstly, an interval of a membership degree axis is obtained; secondly, a cut set interval of fuzzy uncertain variables is obtained through a fuzzy cut set policy; thirdly, by means of an interval uncertainty analysis method, upper and lower structural response boundaries of the cut set interval are obtained; finally, by means of a two-point trapezoid formula and a three-point trapezoid formula, the area defined by the upperand lower structural response boundaries and the membership degree axis is calculated, whether or not the area is converged is judged, structural response fuzzy distribution is output if yes, or if not, next circulation is carried out until the area is converged. It is shown by a numerical example that by means of the structural fuzzy uncertainty analysis method based on the self-adapting matchingpoints, precise structural response fuzzy distribution can be obtained, and a new approach is provided for structural fuzzy uncertainty analysis.

A compressor unit in a portable compressed air source, comprising a reciprocating piston compressor which is driven by a slider crank mechanism and has a piston which is moved in reciprocation in a cylinder, said piston delimiting a compression chamber which has a first dead air volume. The cylinder exit is closed off by a cylinder head with an exhaust valve, and the compression chamber can be connected by a valve to at least one other dead air volume.

Coolers for cooling pet food products and methods regarding same are presented. In an embodiment, the present invention provides a cooler comprising a chamber having product inlet, a product outlet and an air outlet, and at least one air duct having an exit opening so constructed and arranged for providing airflow into the product outlet.

A circuit for improving traveling wave tube amplifier filament service life comprises a filament isolation transformer T1 and a filament voltage regulation circuit. The filament voltage regulation circuit comprises an audion Q1, an operational amplifier N1, a resistor R1, a resistor R2, a resistor R3 and a current-limiting resistor R4. The filament isolation transformer T1 is formed by a primary side winding and a vice side winding, and the primary side winding is composed of two windings and connected with a traveling wave tube power supply interior direct current (DC)/ alternating current (AC) circuit. A centre tap is switched in a collector of the audion Q1, and the vice side winding of the filament isolation transformer T1is connected with a traveling wave tube filament load R5. An emitting electrode of the audion Q1 is in series connection with the current-limiting resistor R4 and then connected to the ground. Reference voltage is switched in a homodromous input end of the operational amplifier N1. One end of the resistor R2 is switched in a reverse input end of the operational amplifier N1, and the other end of the resistor R2 is connected to the ground. An output end of the operational amplifier N1 is in series connection with the resistor R1 and then is switched in a base electrode of the audion Q1. One end of the resistor R3 is switched in the base electrode of the audion Q1, and the other end of the resistor R3 is connected to the ground. The reverse input end of the operational amplifier N1 is connected with the emitting electrode of the audion Q1.

A reflector of a lamp comprises a reflection cup, wherein one inner surface of the reflection cup is a mirror surface; the reflection cup is in bowl shape, and an opening is formed in the top end; a mounting hole used for mounting a light source is formed in the bottom end of the reflection cup; a plurality of stripe-shaped ribs protruding inwards are arranged on the inner wall of the reflection cup; and the ribs are distributed radially with the mounting hole of the reflection cup taken as a center. According to the reflector of the lamp, the ribs are arranged on the inner surface of the reflection cup, so that light reflection angles are increased, illumination angles of the reflection cup are increased, and floodlighting is realized; and at the same time, the inner surface of the reflection cup is not subjected to grinding treatment, and the inner surface is still the mirror surface, so that the lamp reflectivity is not changed, the lamp efficiency is not reduced, and the defect that the lamp efficiency can be reduced by floodlighting in the prior art is overcome.

The invention discloses a utilization system for exhaust leaving velocity of spiral grooves of a single-screw expansion machine, and belongs to the field of power machinery. The utilization system for exhaust leaving velocity of the spiral grooves of the single-screw expansion machine comprises a screw of the single-screw expansion machine, star wheels matched with the screw, a machine shell outside the screw and a main shaft connected with the screw, and is characterized in that exhaust holes which communicate with outlets of the spiral grooves are formed in outlet ends of the spiral grooves at the tail part of the screw; during the operation process, the exhaust holes communicate with the exterior through holes formed in the end face of the machine shell; each spiral groove corresponds to one exhaust hole; and the exhaust holes are the only channel for exhausting gases inside the spiral grooves. According to the utilization system, the underexpansion loss of the single-screw expansion machine under the working condition of a large expansion ratio is reduced, specifically, when the practical expansion ratio is larger than the optimal expansion ratio, the efficiency of the expansion machine is not reduced or the reduction speed is relatively low while the expansion ratio increases.

The invention relates to a dual-power switching circuit and power equipment. The dual-power switching circuit comprises a main power supply branch and an auxiliary power supply branch, the MOS tube Q4 is a P channel MOS tube, and the MOS tube Q6 is an N channel MOS tube; the drain electrode of the MOS tube Q4 is connected to a main power supply, the source electrode is connected to a load, and the grid electrode is connected to the drain electrode of the MOS tube Q6; a first body diode is arranged on the MOS tube Q4, the anode of the first body diode is connected to a main power supply, and the cathode of the first body diode is connected to a load; the grid electrode of the MOS tube Q6 is connected to a main power supply, and the source electrode is grounded; the auxiliary power supply branch comprises an MOS tube Q1, the MOS tube Q1 is a P-channel MOS tube, the grid electrode of the MOS tube Q1 is connected to the main power supply, the drain electrode of the MOS tube Q1 is connected to the auxiliary power supply, and the source electrode of the MOS tube Q1 is connected to a load. Seamless switching between the main power supply and the auxiliary power supply is achieved, the main power supply supplies power preferentially, the main power supply power supply branch and the auxiliary power supply power supply branch can effectively prevent reverse irrigation, and the power supply efficiency is hardly reduced.

The invention provides a device and method for real-time regulation and control of electric arc additive performance and forming stability based on molten pool monitoring, and belongs to the technical field of electric arc additive, and the device comprises an electric arc additive module, an information acquisition and processing module, an intelligent library control module and a water cooling module. The information collecting and processing module can monitor the state of a molten pool and the layer height of a deposition layer in real time in the electric arc additive manufacturing process, simplifies shot image information feature points into data and transmits the data to the intelligent library control module to be stored. Wherein the intelligent library control module comprises a stored expert system part and data collected in real time, and parameters of the electric arc additive module and the water cooling module are adjusted in real time by comparing the data. According to the method, real-time monitoring and regulation of the electric arc additive process are achieved by simplifying molten pool information, and the forming quality and precision of electric arc additive are greatly improved while the electric arc additive efficiency is not reduced.

The invention discloses a sewage treatment system with mutually communicated tanks. The sewage treatment system comprises an original water tank and at least two sewage treatment stations, wherein each sewage treatment station comprises a first reaction tank, a second reaction tank, a first flocculation tank, a first sedimentation tank, a third reaction tank, a fourth reaction tank, a second flocculation tank and a second sedimentation tank, which are sequentially connected, each sewage treatment station adopts linear design, and an isolating wall is arranged between the adjacent sewage treatment stations. The sewage treatment system further comprises at least two corrosion-resistant self-priming pumps which are arranged above the isolating wall and connected with the adjacent sewage treatment stations. The mutual communication among the ten water tanks of the adjacent sewage treatment stations is realized through the adoption of the design provided by the invention. When any water tank or any equipment in the tanks has failure, the water tanks can be pumped dry in short time for the convenience of maintenance.

The invention relates to a combustion device with the ultra-low deviation equivalence ratio and a method. The device comprises a primary fuel channel which is located at the central position of the combustion device with the ultra-low deviation equivalence ratio, a primary air channel which surrounds the primary fuel channel and is coaxial with the primary fuel channel, a secondary air channel which is located on the radial outer side of the primary air channel and is coaxial with the primary air channel and a secondary fuel channel which comprises a plurality of pipelines which are arranged in the secondary air channel and are uniformly distributed around the primary fuel channel; the primary fuel channel and the primary air channel are arranged in a manner that the primary air flow is excessive relative to the primary fuel injection amount, so that low-oxygen-concentration combustion-supporting air is generated through combustion; the secondary fuel channel and the secondary air channel are arranged in a manner that the secondary fuel injection amount is excessive relative to the secondary air flow, and therefore low-calorific-value secondary fuel is generated through combustion.The device is further provided with a burnout area for mixed combustion of low-oxygen-concentration combustion-supporting air and low-calorific-value secondary fuel.