43results about How to "Solve the problem of excessive loss" patented technology

The invention discloses a synchronous rectification switching tube driving method of a phase-shifted full-bridge circuit. The method is used for providing driving signals for a lead bridge arm switching tube and vice-side synchronous rectification switching tubes of the phase-shifted full-bridge circuit. The method includes that driving signals of four primary side power switches of the phase-shifted full-bridge circuit are received and subjected to logic conversion to obtain primary driving signals of two vice-side synchronous rectification switching tubes; output current is sampled, sequences of a power switch of a primary side full-bridge circuit lead arm are adjusted, or the phase-shifted full-bridge circuit is subjected to synchronous rectification when sequences of two vice-side synchronous rectification switching tubes are adjusted. The invention further discloses a synchronous rectification switching tube driving device of the phase-shifted full-bridge circuit. By means of the synchronous rectification switching tube driving method, a soft-switching technology in a full load range of the phase-shifted full-bridge circuit can be achieved, and purposes for reducing light load loss and improving efficiencies are achieved.

The invention discloses an infrared and visible light image fusion method based on robust principal component sparse decomposition and belongs to the image processing technology field. The method is used to mainly solve a problem that spectral information of a visible light image loses too much during existing infrared and visible light image fusion. The method comprises the following steps of carrying out a robust principal component analysis on images which are accurately registered respectively so as to acquire respective sparse matrixes; carrying out non-downsampling Contourlet conversion on the images respectively so as to acquire respective high and low frequency sub-band images; using the sparse matrixes to fuse the low frequency sub-band image and the high frequency sub-band image; and carrying out non-downsampling Contourlet inverse transformation so as to acquire a fusion image. The method can be applied to registered infrared and visible light image fusion processing.

The invention relates to a bidirectional PFC soft switch and a control method thereof, and belongs to the field of a circuit topology. The bidirectional PFC soft switch and the control method thereof,which are used for improving the integral efficiency of a converter, are provided. The bidirectional PFC soft switch comprises a main loop and an auxiliary branch, wherein the main loop comprises a first switch tube S1, a second switch tube S2, a first resonant capacitor C1, a second resonant capacitor C2, an inductor L, a first filtering capacitor Co1 and a second filtering capacitor Co2, the auxiliary branch comprises a third switch tube S3, a fourth switch tube S4, a resonant inductor Lr, a transformer T and a full-bridge rectification bridge, the main loop is a bidirectional half-bridge PFC converter, soft switching of the main loop under a boost mode or a buck mode is assisted to be completed by the auxiliary branch, and soft switching of a switch tube of the auxiliary branch is alsoachieved.

The invention discloses a high-frequency high-saturation-flux-density ferrite, a preparation method, an inductor and a transformer. The ferrite contains main components and auxiliary components in parts by mole: the main components contain 55-57 mol% of Fe2O3, 0-3.5 mol% of ZnO, and the balance MnO; the auxiliary components contain 0.01-0.03 wt% of Nb2O5, 0.02-0.10 wt% of CaCO3, 0.01-0.04 wt% of V2O5, 0-0.01 wt% of SiO2, 0-0.05 wt% of Ta2O5, 0-0.05 wt% of TiO2 and 0.10-0.25 wt% of Co2O3. The ferrite provided by the invention has high saturation magnetic flux density and can be suitable for inductors and transformers. Moreover, the inductor prepared from the high-frequency ultrahigh-saturation magnetic flux density manganese-zinc ferrite material has the advantages of small size and is capable of meeting the requirement for miniaturization of devices.

The invention discloses a fruit vegetable juice and a non-thermal preparation method thereof. The method comprises the following steps: 1) carrying out colloid milling, homogenization and degassing on the juice prepared by blanching fruits or vegetables in sequence, carrying out pressure maintaining in atmosphere of carbon dioxide with pressure intensity of 5-6MPa, releasing the pressure to normal pressure after the pressure maintaining, and collecting the obtained semi-finished product; 2) cooling the semi-finished product obtained in the step 1), carrying out pressure maintaining at normal temperature with pressure intensity of 100-300MPa, and releasing the pressure after the pressure maintaining to obtain the fruit and vegetable juice. The method has the advantages of ensuring the safety and nutrition of the good while passivating the endogenous enzyme and killing the microorganism, and being efficient, energy-saving, green and environment-friendly.

The invention discloses a power supply circuit, which comprises a first-stage circuit for converting input voltage into direct voltage, and a second stage circuit, wherein the second stage circuit comprises a main power switching circuit for converting the direct voltage into first output voltage, a first standby power switching circuit for converting the direct voltage into second output voltage, a feedback circuit for connecting the main power switching circuit and the first standby power switching circuit to generate a feedback signal according to the first and second output voltage so as to make the first standby power switching circuit adjust the second output voltage according to the feedback signal, a second standby power switching circuit for converting the first output voltage or the second output voltage into a standby power, and a power distribution circuit for outputting the first output voltage or the second output voltage to the second standby power switching circuit.

The invention relates to a method for splitting DL-p-hydroxymandelic acid racemate to prepare high purity D-p-hydroxymandelic acid. The method for splitting DL-p-hydroxymandelic acid is characterized in that (S)-(+)-2-amino-4-phenylethyl butyrate hydrochloride is used as resolving agent to perform chemical splitting to DL-p-hydroxymandelic acid. The method of the invention solves the problems of too many operation steps, long reaction time, low product purity, low yield and the like in the existing method for preparing high purity D-p-hydroxymandelic acid by splitting DL-p-hydroxymandelic acid racemate.

The invention discloses a color image-grey-scale image-color image conversion method, which comprises the following steps of: a coding process of converting a color image into a grey-scale image: carrying out RGB (Red, Green, Blue)-Ycbcr color space conversion on an original color image to obtain a brightness plane and two chrominance planes, and compressing the two chrominance planes to obtain compressed chrominance planes, the binary code stream is used as watermark information to be embedded into a brightness plane to obtain a watermark grayscale image; and a grayscale image reconstruction color image decoding process: extracting a binary code stream of a compressed chrominance plane from the grayscale image embedded with the watermark information, recovering the two chrominance planes according to the binary code stream, performing color space conversion from Ycbcr to RGB on the brightness plane and the two chrominance planes, and reconstructing a color image. According to the method, more color information is stored, a brightness plane with small distortion or without distortion can be obtained during reconstruction, and not only can a high-quality gray level image be obtained, but also a high-quality reconstructed color image can be obtained.

The invention relates to a recovery device for oil gas discharged when light oil products are loaded into trucks or ships. The recovery device for oil gas discharged when light oil products are loaded into trucks or ships comprises an oil gas recovery part and an oil gas collection part. The oil gas collection part comprises an oil gas delivery pipeline, an oil gas collection pipeline, a delivery pump and a control instrument. The outlet of the oil gas delivery pipeline is communicated with the inlet of the delivery pump, and the outlet of the delivery pump is communicated with the oil gas recovery part. One end of the oil gas collection pipeline is communicated with the oil gas delivery pipeline, and the other end of the oil gas collection pipeline is communicated with an oil gas escape opening in the process when light oil products are loaded into trucks or ships. The oil gas collection pipeline is provided with a flowmeter and a flow regulating valve, the flow regulating valve is controlled by the control instrument, and the volume flow rate of the oil gas is controlled to be one times to 1.5 times that of the oil products entering the corresponding trucks or ships in the truck or ship loading process. The recovery device is easy and convenient to use, oil gas can be fully collected, and the recovery device is favorable for recovery of escape oil gas.

The invention discloses a lithium battery heating device and a heating method. The device comprises a battery management system, a self-heating power converter and a lithium battery, wherein the lithium battery and the self-heating power converter are connected with the battery management system, and the self-heating power converter is in closed-loop connection with the lithium battery; the battery management system is used for detecting the temperature of the lithium battery, generating a first signal according to the detected temperature and sending the first signal to the self-heating powerconverter; and the self-heating power converter is used for forming alternating current charging and discharging current on the lithium battery according to the first signal so as to heat the lithiumbattery. Therefore, according to the method provided by the invention, the lithium battery is directly heated by using the heat effect when the alternating current charging and discharging current passes through the internal resistor of the lithium battery, and the problem of overlarge energy loss in the heat transfer process is solved, so that the heating efficiency of the lithium battery is improved.

The invention discloses a synthetic method for raising reaction efficiency during production process of lithium hexafluorophosphate. The method comprises the following steps: 1) gasification of liquid hydrogen fluoride: by heating liquid hydrogen fluoride through a hot water jacket, hydrogen fluoride is gasified to a gaseous state; 2) liquification of gaseous hydrogen fluoride: the above gaseous hydrogen fluoride is conveyed through a delivery pipe into a low temperature condenser to undergo heat-exchange condensation, and then the gaseous hydrogen fluoride is converted to a liquid state; and 3) addition of hydrogen fluoride into a reaction vessel: the above liquid hydrogen fluoride is added drop by drop into a reaction pot filled with phosphorus pentachloride to carry out a reaction. The liquid hydrogen fluoride is added drop by drop at uniform speed, and flow velocity is controlled through a reaction valve. By the synthetic method for raising reaction efficiency in the production process of lithium hexafluorophosphate, production efficiency of lithium hexafluorophosphate, purity of the product is raised, safety of production is enhanced, and environmental pollution is also reduced.

The invention discloses red ginseng slices stir-fried with honey. The red ginseng slices stir-fried with honey are made from the following raw materials in parts by weight: 85-115 parts of red ginsengslices, 130-170 parts of honey, 2.7-3.7 parts of Chinese wolfberry fruits, 1.4-1.8 parts of Chinese jujubes, 0.7-0.9 part of poria cocos and 85-105 parts of purified water. The invention further discloses a making method of the red ginseng slices stir-fried with honey. Ingredients of the red ginseng slices stir-fried with honey comprise red ginseng, the honey, the Chinese jujubes, the Chinese wolfberry fruits and the poria cocos. The red ginseng slices stir-fried with honey are used for conditioning the symptoms of excessive consumption of physical strength, weak constitutions, drooping spirits, fatigue, weakness and the like, caused by overloaded intelligence labor and overload physical labor, and are leisure foods convenient for people to eat.

The invention discloses a switching power supplier provided with a frequency conversion device, comprising a rectifying device, a voltage transformation device, an output circuit, a switch device, a pulse width modulation control device, a feedback circuit, a pulse width modulation control device, and a frequency conversion modulation device used for modulating switch frequency of the pulse width modulation control device. The frequency conversion modulation device comprises a first frequency modulation resistance connected with the pulse width modulation control device, a first reference voltage circuit and a second reference voltage circuit respectively connected with the pulse width modulation control device, a second frequency modulation resistance in a bridge joint between the pulse width modulation control device and a first by-pass switch, and a third frequency modulation resistance in a bridge joint between the pulse width modulation control device and a second by-pass switch, wherein the first by-pass switch is connected with the first reference voltage circuit, and the second by-pass switch is connected with the second reference voltage circuit.

The invention discloses a parallel high-load bundled aerial cable. The parallel high-load bundled aerial cable comprises a first pipe body, a second pipe body is arranged in the first pipe body, threethird grooves are formed in the inner side wall of the first pipe body at equal intervals, a first insulating layer is bonded to the inner side walls of the third grooves, a first cable is attached to the inner side of the first insulating layer, a second cable is arranged in the second pipe body, a second insulating layer is attached to the outer side wall of the second cable, the outer side wall of the second insulating layer is attached to the inner side wall of the second pipe body, and three connecting rods are welded to the outer side wall of the second pipe body at equal intervals. A heat conduction layer is arranged on the outer side of a flame-retardant layer, foam can assist in heat dissipation while buffering, a macromolecule breathable film only allows gas to pass through, then heat generated when the aerial cable is high in load is prevented from being accumulated in a bearing layer, and the problems that the resistance of the cable is increased, and the loss of electricenergy is too high in the transportation process are solved.

The invention discloses an alloy material for manufacturing a motor rotor and a preparation method thereof. The novel alloy material for manufacturing the motor rotor is composed of following raw materials according to weight percent: 95% of copper and 5% of iron. The preparation method comprises the steps of smelting, pouring, quenching and pouring the raw materials including copper and iron in sequence so as to obtain the novel alloy material for manufacturing the motor rotor ultimately, wherein the conductivity of the novel alloy material is 14245501.3 s / m, and the density is 8663.8 Kg / M<3>.The alloy material for manufacturing the motor rotor has good mechanical properties, and the technical problems of hard and brittle silicon steel sheets, bad mechanical properties, difficulty in processing and assembling into iron cores and the like when the silicon content is high are solved. The alloy material has good magnetic permeability and conductivity, the problem of high loss of a motor during operation can be preferably solved, the efficiency of the motor is effectively improved, normal operation of the motor is guaranteed, and the service life of the motor is prolonged.

The invention discloses a battery heating assembly and a manufacturing process thereof, and belongs to the technical field of new energy automobile battery devices. The assembly comprises a bottom support serving as a base, a lining assembly, a metal core used for heat transfer and an electromagnetic heating ring used for heating the metal core are arranged in the bottom support, the bottom of the metal core is arranged on the bottom support, and the electromagnetic heating ring can be arranged on the outer side of the metal core in a sleeving mode or stably assembled through the lining assembly. The electromagnetic heating ring is electrified to heat the metal core, and heat of the metal core is transferred out for heating; and the problems that the cruising ability of a new energy vehicle adopting electricity as energy is greatly reduced under the condition that the environment temperature is too low or low in winter, and the loss of a battery is large in the using process are solved, the heating efficiency can be effectively improved in an electromagnetic induction heating mode, the activity of the battery is effectively improved, the cruising ability of the new energy vehicle is prolonged, and the service life of the battery is effectively prolonged.

This invention relates to a design method for a curved optical waveguide structure with a modified section including reducing the leakage of optical waveguide modes by changing its section shape, namely that the structure of a traditional shaft-symmetry section is modified to increase the outside diameter of the waveguide so as to contain more transmission modes and reduce the leakage of modes in transmission field to increase the transmission efficiency. The method includes: said curved optical waveguide is composed of a core and a cladding and the core is in the cladding, the thickness or height of the outside core is greater than that of the inside core or that on the curved face is increased and the refractive index of the core is greater than that of the cladding.

Disclosed herein are high efficiency, low loss AC-DC power supply circuits, and associated control methods. In one embodiment, an AC-DC power supply circuit can include: (i) a rectifier configured to rectify an AC power supply to generate a DC input voltage; (ii) a first stage voltage converter configured to convert the DC input voltage to a first output voltage, and to convert a first control signal to a feedback signal that represents the first output voltage; and (iii) a second stage voltage converter configured to convert the first output voltage to a constant DC output signal, where the first control signal represents a duty cycle of the second stage voltage converter.

The invention discloses an ultra-broadband power divider based on ridge-gap waveguide technology, relates to the field of microwave / millimeter wave passive devices, and is specifically an ultra-broadband power divider / combiner based on novel ridge-gap waveguide technology. In order to overcome the shortcomings in the prior art, the operating bandwidth of the solid-state power amplifier is improved so that it can work effectively in several frequency bands, thereby saving design cost. The invention proposes an ultra-wideband ridge-gap waveguide power divider / combiner, which has the advantages of large power capacity, ultra-wideband (3 octaves), compact structure, low loss, good amplitude-phase consistency, and easy processing and assembly. .

The invention provides a decellularized pulmonary support. The decellularized pulmonary support is prepared from sodium lauryl ether sulfate and a DNase I solution through injection treatment. The decellularized pulmonary support prepared by a langendorff injection system is clean in cell removal, a three-dimensional structure and an extracellular matrix protein are reserved completely, and the fusion, cellularization and vascularization are good 6 weeks after allograft subcutaneous transplanting. A preparation method of the decellularized pulmonary support is high in efficiency and simple in step, can be applied to batch production and has a good application prospect in the fields of tissue engineering lungs and loose organs.

The invention discloses a power supply method, a power supply device, an outer machine and an inner machine of a multi-split air conditioning system. The method comprises the following steps that thepower failure of the inner machine is detected; and a first control instruction is sent to an inner machine adjacent to the inner machine subjected to the power failure, so that the adjacent inner machine supplies power to the inner machine subjected to the power failure. According to the method, the device, the outer machine and the inner machine, the problem that the loss of a long-distance communication power supply line is too large due to the fact that the outer machine supplies the power to the inner machine during the power failure of the inner machine can be effectively solved; the problem that an electronic expansion valve cannot be controlled due to the power failure of the inner machine can be effectively solved; and meanwhile, the control cost for supplying the power to the inner machine can be effectively reduced.

The invention relates to a bidirectional PFC soft switch and a control method thereof, and belongs to the field of a circuit topology. The bidirectional PFC soft switch and the control method thereof,which are used for improving the integral efficiency of a converter, are provided. The bidirectional PFC soft switch comprises a main loop and an auxiliary branch, wherein the main loop comprises a first switch tube S1, a second switch tube S2, a first resonant capacitor C1, a second resonant capacitor C2, an inductor L, a first filtering capacitor Co1 and a second filtering capacitor Co2, the auxiliary branch comprises a third switch tube S3, a fourth switch tube S4, a resonant inductor Lr, a transformer T and a full-bridge rectification bridge, the main loop is a bidirectional half-bridge PFC converter, soft switching of the main loop under a boost mode or a buck mode is assisted to be completed by the auxiliary branch, and soft switching of a switch tube of the auxiliary branch is alsoachieved.

The invention provides a method for forming a semiconductor structure, which relates to the technical field of semiconductor processing. The method for forming a semiconductor structure includes the following steps: S1. Form a mask structure on the upper surface of the semiconductor structure, and after etching, Form an opening on the mask structure; S2. Through the opening, use etching plasma gas to etch the semiconductor structure at the bottom of the mask structure to form an upper trench structure, and the bottom edge region and sides of the upper trench structure formed by etching The wall is formed with organic residues; S3. Etching the bottom of the upper trench structure to form a lower trench structure; wherein, the width of the lower trench structure is smaller than the width of the upper trench structure; S4. In the upper trench structure and the lower trench Ion implantation is carried out in the trench structure to form a high resistance region.

The invention relates to a wet-process spunlace composite material and a manufacturing method which can fundamentally solve the low strength of common wet-process spunlace nonwoven materials and the large difference in longitudinal and transverse strength. The wet-process spunlace composite material has a double-layer structure. The upper layer is a wet-laid fiber net, and the lower layer is a woven fabric. Advantages: It solves the problem of low strength and large difference in longitudinal and transverse strength of ordinary wet-process spunlace nonwoven materials, improves product physical properties, broadens product application fields, and plays an important role in the promotion and application of wet-process spunlace nonwovens technology significance.

The invention relates to the technical field of power equipment, and particularly discloses a radial iron core cake-based iron core assembly structure. The radial iron core cake-based iron core assembly structure comprises an upper-part fastening fitting, a lower-part fastening fitting, iron core posts and upper-lower fastening bolts, wherein multiple groups of iron core posts are arranged betweenthe upper-part fastening fitting and the lower-part fastening fitting, each group of iron core post is fixedly connected with the upper-part fastening fitting and the lower-part fastening fitting bythe upper-lower fastening bolts, one end of each upper-lower fastening bolt extends out of the upper-part fastening fitting, the other end of the upper-lower fastening bolt extends out of the lower-part fastening fitting, each group of iron core post comprises a plurality of radial iron core cakes, and the plurality of radial iron core cakes of each group of iron core post are arranged in a lamination way. The invention also discloses a reactor. When the radial iron core cake-based iron core assembly structure provided by the invention is applied to the reactor, the loss can be effectively reduced, and the problem of relatively large loss in the prior art is solved.

The invention discloses a structure capable of reducing heat loss of a high-temperature pipeline. The structure comprises a lining barrel, a metal spun silk net, a thermal insulation block, a metal barrel, a metal wire and a high-temperature pipeline outer shell; the metal spun silk net wraps the outer surface of the lining barrel; the lining barrel is sleeved by the metal barrel; the thermal insulation block is filled between the metal barrel and the metal spun silk net; the metal wire is bundled on the outer surface of the metal barrel; the high-temperature pipeline outer shell is positioned on the outermost layer of the structure for reducing the heat loss of the high-temperature pipeline. The structure disclosed by the invention can be used for realizing thermal protection of the high-temperature pipeline, and the design thickness of the high-temperature pipeline can be reduced, and the heat loss of an air flow in the pipeline can be reduced.

The invention discloses an infrared and visible light image fusion method based on robust principal component sparse decomposition, belongs to the technical field of image processing, and mainly solves the problem of excessive loss of spectral information of visible light images in the existing infrared and visible light image fusion. The specific implementation steps of the present invention are as follows: respectively perform robust principal component analysis on the accurately registered images to obtain respective sparse matrices; respectively perform non-subsampling Contourlet transformation on the images to obtain respective high and low frequency sub-band images; use The sparse matrix fuses the low-frequency sub-band image and the high-frequency sub-band image respectively; performs non-subsampling Contourlet inverse transformation to obtain the fused image. The invention can be applied to fusion processing of registered infrared and visible light images.

The invention discloses a high frequency power supply with high efficiency and low loss. After passing through a resistor R1, an audion Q1 and an audion Q2, an input signal reaches a field effect tube M1 through a resistor R111 and outputs a signal through a resistor R100; a voltage-regulator tube D1 enables the field effect tube to work at a certain voltage. A high power tube works at an open zone and a close zone after being driven by a power amplifying tube, and then connected to a AT89S2051 singlechip pin P1.0-P1.5 of a control unit; through the action of a singlechip, the output current is effectively controlled, and the purposes of preventing a molybdenum wire from burning and breaking for excessive current and reducing loss of the molybdenum wire are achieved. Through the principle, the effect of debugging the software write on a machine tool is very good, the normal processing efficiency is up to more than 8,000 per hour, and also 12,000 per hour as the fastest. The loss of the molybdenum wire is one time higher than that in the past, so that the problems of low processing efficiency and high molybdenum wire loss of the quick thread cutting high-frequency power are solved effectively, the loss of each company is reduced; the high efficiency and high-benefit operation of every company is guaranteed; therefore, the high frequency power supply has a very good effect.

The invention discloses a kind of collector heat pan bearer it concludes the bearer body setting a open hole corresponding the head of oven in the center and the on the bearer body said above sets up a pan floor fasten flaw used to support the pan floor and the internal of bearer body sets up many fire-resisting reverse hot plate which can assemble the burning flame to the pan floor. By mirroring of the fire-resisting reverse hot plate to the igniting flame the flame which is generated during the igniting can be assembled to the pan floor so it not only resolve the problem that the ordinary pan bearer losses so lots of quantity of heat when it is igniting but also improve the work environment of chicken and save the energy.