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 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.

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.

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.

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 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 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.