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35results about How to "Reduce thermal power consumption" patented technology
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Charging method adopting USB interfaces
InactiveCN101771178AReduce thermal power consumptionAvoid overheatingBatteries circuit arrangementsSecondary cells charging/dischargingCharge voltageElectricity
The invention discloses a charging method adopting USB interfaces, which is characterized in that after detecting voltage input on the power pins of the USB interfaces, a charge control module firstly detects the data pin signals of the USB interfaces and then sets different charge current for the batteries according to the difference of the data pin signals; if detecting that the two data wires of the USB interfaces are at high level, the charge control module sets high current for charging the batteries, or the charge control module sets low current for charging the batteries; the USB interfaces employ voltage of 4.5-5.6V. In the method, under the same low charge voltage, whether the inserted power supply is from the computer or the travel charger is judged by recognizing the data pin signals of the USB interfaces, thus setting different charge current for the batteries, solving the problem that the existing travel chargers have big current and big voltage when charging and reducing the heat power consumption during charging.
Owner:YITUO SCI & TECH CO LTD SHENZHEN
Heat insulating cage and ingot casting furnace with same
InactiveCN101886291ASolve wasteReduce thermal power consumptionPolycrystalline material growthSingle crystal growth detailsHeating powerIngot casting
The invention discloses a heat insulating cage for a polycrystalline ingot casting furnace, comprising a top plate and a side plate. The heat insulating cage is characterized in that a heat reflecting layer is formed on the inner side of an inner layer of the top plate and/or the side plate, wherein the heat reflecting layer is made of materials which has the characteristic that the reflecting quantity of the heat radiated to the heat reflecting layer is higher than the reflecting quantity of the heat radiated to the inner layer of the top plate and/or the side plate. The heat insulating cage can effectively reflect the heat quantity radiated to the heat insulating cage back to the inner part of the ingot casting furnace, thereby solving the problem of heat waste to a certain degree and reducing heat power consumption. The invention further discloses an ingot casting furnace with the heat insulating cage.
Owner:王敬
Heat-preservation cylinder for single crystal furnace and single crystal furnace with same
The invention discloses a heat-preservation cylinder, which is used for a single crystal furnace. The heat-preservation cylinder is characterized in that: a heat reflection layer is formed on the inner side of an inner layer of the heat-preservation cylinder, and is made from a material which can reflect more heat incident onto the heat reflection layer than that incident onto the inner layer of the heat-preservation cylinder. The heat-preservation cylinder of the invention can effectively reflect the heat irradiated to the heat-preservation cylinder back into a furnace body again so as to solve the problem of heat waste to a certain extent and reduce heat power consumption. The invention further discloses the single crystal furnace with the heat-preservation cylinder.
Owner:王敬
Oil saving piston of internal-combustion engine
InactiveCN1959091AHigh power outputBest design clearanceMachines/enginesPistonsPiston ringEngineering
An oil-saving piston of internal combustion engine consists of piston skirt section, piston skirt wall and piston ring. It is featured as forming multiple groove and multiple trough hole as well as multiple nonthrough hole at said skirt section of piston then using said groove to provide stored lubrication oil and said through hole to provide supplied lubrication oil as well as said nonthrough hole to provide stored lubrication oil.
Owner:王德恒 +1
Anti-flowing backwards protection circuit
ActiveCN105244864AAvoid enteringSolve the problem of high power consumptionEmergency protective circuit arrangementsMOSFETPower flow
The invention provides an anti-flowing backwards protection circuit, which is electrically connected between an input circuit and an output circuit. The anti-flowing backwards protection circuit comprises a reference voltage providing circuit, a voltage comparing circuit and an anti-flowing backwards circuit, wherein the voltage comparing circuit comprises a current detection resistor; the output end of the reference voltage providing circuit is connected with the first input end of the voltage comparing circuit; the negative electrode of the input circuit is connected with the negative electrode of the output circuit via the current detection resistor; feedback voltage is formed on the current detection resistor to act on the second input end of the voltage comparing circuit; and the anti-flowing backwards circuit comprises a P channel MOSFET. Through comparing the reference voltage and the feedback voltage by the voltage comparing circuit, the working state of the P channel MOSFET is controlled through the output end of the voltage comparing circuit, backward flowing current can be prevented from entering the input circuit from the output circuit, and the technical problems of large power consumption and much cooling when a diode is adopted in the prior art to realize backward flowing prevention can be solved.
Owner:SICHUAN HUIYUAN OPTICAL COMM CO LTD
Backlight circuit, and method and terminal for controlling voltage of backlight circuit
InactiveCN102930825AImprove battery lifeDoes not affect experienceElectrical apparatusStatic indicating devicesAutomatic controlSwitching power
The invention provides a backlight circuit, and a method and a terminal for controlling the voltage of the backlight circuit. The backlight circuit comprises a luminescent device module, a current control circuit module, a switch power module and a processor, wherein the luminescent device module is serially connected with the current control circuit module; the switch power module provides voltage for the luminescent device module; the processor is used for controlling the output voltage of the switch power module in a backlight starting process, and enables the voltage of the current control circuit module to be equal to or slightly greater than the pre-stored corresponding reference voltage of the current control circuit module under the corresponding brightness level. The using voltage can be automatically controlled according to the backlight brightness level, backlight power consumption can be reduced to the maximum degree on the premise that the user experience is unaffected, so that the purpose of saving energy is achieved, and the endurance ability of the terminal is improved.
Owner:ZTE CORP
Probe card capable of replacing electron accessory rapidly
InactiveCN1963531AEasy to replaceMaintain electrical measurement qualityElectrical measurement instrument detailsElectrical testingProbe cardElectron
This invention relates to rapid update electron parts probe card, which comprises one circuit board, multiple probes and several container sockets, wherein, the circuit board is set with electron circuit connected to the passive elements joints; detect probes is connected to electrical circuit; probe card is to test by detector; each container socket is set with two conductive fix parts on the points to form one container part and at least on open; the container parts are to contain above passive element to connect two fix parts through open to transfer each passive element.
Owner:MPI CORP
Method for reducing friction between piston and cylinder wall of internal-combustion engine, and Oil saving piston
The invention provides a method for reducing the friction between the piston and the cylinder wall of an internal combustion engine, comprising the following steps: (a) constantly guiding the lubricating oil to flow to the surface of the piston skirt through the through hole provided on the piston skirt during the movement of the piston and (b) storing lubricating oil in the groove provided on the piston skirt and the non-through hole of the piston skirt, so that a sufficient amount of lubricating oil is always applied between the cylinder wall of the internal combustion engine and the surface of the piston skirt lubricating oil, and isolate the metal contact between the cylinder wall and the piston skirt, and finally reduce the friction between the piston skirt and the cylinder wall, reduce the internal combustion engine friction work loss, heat power consumption, and improve the internal combustion engine Higher power output, lower fuel consumption, noise and emissions. To achieve the dual benefits of fuel saving and environmental protection. In order to achieve the purpose of the method and steps for reducing the friction between the piston and the cylinder wall of the internal combustion engine, the invention provides a fuel-saving piston of the internal combustion engine, the piston comprising: a piston skirt, a piston skirt wall, and a piston ring. A plurality of grooves are formed in the piston skirt, a plurality of through holes are formed in the piston skirt, and a plurality of non-through holes are formed in the piston skirt. The piston skirt groove provides storage lubricating oil, the piston skirt through hole provides supply lubricating oil, and the piston skirt non-through hole provides storage lubricating oil. The present invention can be widely applied to: internal combustion engines, including vehicles, ships, tanks, generators, mining machinery, compressors and the like. The fuel saving effect and environmental protection benefit are very remarkable.
Owner:王德恒 +1
Gas sensor and preparation method thereof
PendingCN107941859AReduce areaReduce heating areaMaterial resistanceProcess engineeringMechanical engineering
The invention provides a gas sensor and a preparation method thereof. The gas sensor includes a base and a plurality of gas sensitive elements. The base is provided with a plurality of spaced hollowed-out parts. Each gas sensitive element is disposed in one hollowed-out part. The plurality of gas sensitive elements and the plurality of hollowed-out parts are disposed in one-to-one correspondence,and redundant part on the base is excised simultaneously, so that the base becomes hollowed-out. The hollowed-out base has a decreased area, the heating area of a gas sensitive element array packagingstructure is reduced, and then the thermal power consumption of the gas sensitive element array packaging structure is reduced.
Owner:中国人民解放军陆军防化学院
Data acceleration processing system
ActiveCN110413561AImprove reading speedImprove computing efficiencyMultiple digital computer combinationsArchitecture with single central processing unitElectricityData transmission
The invention relates to a data acceleration processing system which comprises a processing device, a storage device, an interface device and a control device. And the processing device is used for realizing accelerated operation processing of the data. And the storage device is electrically connected with the processing device and is used for storing the data transmitted by the server. And the interface device is electrically connected with the processing device and is used for realizing data transmission between the processing device and a server. And the control device is used for regulating and controlling the state of the processing device. In the operation process, a large number of operation tasks in the server can be transmitted to the processing device for operation through the interface device. A large amount of cache data may be stored in the storage device during completion of the operation. According to the data acceleration processing system, through cooperation of the processing device, the storage device, the interface device and the control device, the data reading speed and the operation efficiency are improved.
Owner:CAMBRICON TECH CO LTD
Battery module for improving charging rate and efficiency of terminal equipment and working method thereof
InactiveCN111431240AReduce charging currentReduce thermal power consumptionBatteries circuit arrangementsElectrical testingCharge currentSupply management
The invention discloses a battery module for improving the charging rate and efficiency of terminal equipment and a working method of the battery modulethereof. The battery module comprises a batterypack composed of a plurality of identical batteries, a battery panel and an external interface. Power supply output management, charging management, electric quantity detection, battery switch controland charging and power supply path switching of the battery module are carried out through a the power supply management circuit on the battery panel. During early-stage high-voltage charging, the batteries are connected in series. T, the charging current of each battery is reduced , and the thermal power consumption of the battery is greatly reduced, so that the heating of the battery is reduced, the contradiction between quick charging and heating is solved, the charging speed of the battery module is increased, the user experience of the terminal equipment is improved, the battery module supports the output of various voltages, and the battery is more flexible to use.
Owner:NORTHWEST UNIV
Four-leaf aberration deformation mirror device
InactiveCN104076618ASmall space sizeReduce thermal power consumptionPhotomechanical exposure apparatusMicrolithography exposure apparatusOptical axisEngineering
The invention discloses a four-leaf aberration deformation mirror device which belongs to the field of system aberration compensation of optical systems and aims at solving the problems that the mounting and the detection are difficult to perform and the moving rigid body displacement is large in the prior art. The device comprises an optical element, a deformable mirror frame, eight actuators, eight displacement sensors, an upper fixed plate and a lower fixed plate, wherein the optical element and the deformable mirror frame are connected to form a mirror frame component in an adhesion or compression mode; the upper fixed plate and the lower fixed plate are respectively fixed on the deformable mirror frame through screws; four actuators which are distributed at an angle of 90 degrees in the circumferential direction are arranged on the upper fixed plate; four actuators which are distributed at an angle of 90 degrees in the circumferential direction are arranged on the lower fixed plate; the eight actuators on the upper fixed plate and the lower fixed plate are distributed at an angle of 45 degrees; the actuators are arranged along the optical axis of the optical element; input displacement vertically acts on the deformable mirror frame; the eight displacement sensors are respectively arranged on the upper fixed plate and the lower fixed plate and are opposite to the eight actuators.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Astigmatic deformable mirror device
InactiveCN104076617ASmall space sizeReduce thermal power consumptionPhotomechanical exposure apparatusMicrolithography exposure apparatusOptical axisEngineering
The invention relates to an astigmatic deformable mirror device, which belongs to the field of system aberration compensation of an optical system and aims to solve the problems of difficulty in processing and manufacturing and large displacement of an introduced rigid body in the prior art. The astigmatic deformable mirror device comprises an optical element, a deformable mirror frame, four actuators, four displacement sensors, an upper fixed plate and a lower fixed plate, wherein the optical element and the deformable mirror frame are connected into a mirror frame assembly in a gluing or compressing mode; the upper fixed plate and the lower fixed plate are fixed on the deformable mirror frame respectively by screws; two actuators which are circumferentially distributed in 180 degrees are arranged on the upper fixed plate, the other two actuators which are circumferentially distributed in 180 degrees are arranged on the lower fixed plate, the four actuators on the upper fixed plate and the lower fixed plate are circumferentially distributed in 90 degrees, the actuators are arranged along the direction of an optical axis of the optical element, and input displacements vertically act on the deformable mirror frame; and the four displacement sensors are respectively arranged on the upper fixed plate and the lower fixed plate and are opposite to the four actuators.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Core bits for soft-hard drilling objects
The invention provides a coring bit suitable for soft-hard drilling objects. The coring bit comprises a bit base body and a conical head arranged below the bit base body, wherein the bit base body is in a hollow cylinder shape; a drill stem connecting part is arranged at the upper end of the bit; the inner diameter of an opening of the conical head is smaller than the inner diameter of the hollow cylinder of the bit base body; an external spiral is arranged on the outer surface of the bit base body; grooves are formed in the inclined surface and the bottom surface of the conical head; cutting tools with corresponding shapes are arranged in the grooves and are riveted in the grooves through rivets; a limiting piece for limiting initial positions of the cutting tools is formed between holes in the rivets and the cutting tools; a high-temperature-resistant elastic cushion block is arranged between the cutting tools arranged between the limiting piece and the bottom of the groove and the groove. The coring bit suitable for soft-hard drilling objects is high in adaptability, and hard and soft rocks can be simultaneously crushed without replacing the bit; smooth powder discharge is realized, the cutting heat and friction heat are dissipated out of the hole bottom through drilling cuttings, and the heat dissipation is reduced; in order to improve the cutting efficiency, the cutting blade can have multiple cutting angles by adjusting the size of a rubber cushion block.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Method for normal pressure continuous desulfurization of rubber
InactiveCN101880406BAvoid unsafe factorsAvoid secondary pollutionPlastic recyclingEnvironmental resistanceFluidized bed
The invention provides a method for the normal pressure continuous desulfurization of rubber, which comprises the steps of: crushing rubber, then adding softening agent and activating agent into the crushed rubber power, evenly mixing the agents with the rubber powder, and desulfurizing the evenly mixed material, wherein the desulfurization comprises the following step that: the material is continuously fed, via a fluidized bed, into a desulfurization pipeline which is equidistantly divided into five sections with each being externally heated, temperature of the five sections of the pipeline is the same, but temperature difference between the sections of the pipeline is present, the heating temperature of the sections of the pipeline in descending order is from 280 DEG C to 240 DEG C in the flowing direction of the material, the interior of the desulfurization pipeline is at normal pressure, the length of each section of the desulfurization pipeline is from 14 to 17 meters, and the flowing time of the material in the entire desulfurization pipeline is from 15 to 20 minutes. The method for the normal pressure continuous desulfurization of rubber according to the invention has the advantages of: good safety, environmental protection, energy saving, stable product performance and high efficiency.Owner:都江堰市新时代工贸有限公司
Delay-tolerant data commuting traffic network communication clean power supply combined scheduling method and system
PendingCN114548690AReduce congestionReduce thermal power consumptionResourcesInformation technology support systemTraffic networkPower grid
The invention discloses a combined scheduling method and system for communication and clean power supply of a delay-tolerant data commuting traffic network, and the method comprises the steps: constructing a classified and layered space-time alignment model on the basis of an existing communication network, and designing a space-time matching method of a multi-dimensional entity. The integrated scheduling commuting vehicle piggybacking data, the delay-tolerant traffic unloading of the communication network, the wind power photovoltaic power consumption, the piggybacking of the load valley period of the communication network, the clean energy power supply time window and the data of the commuting vehicle based on the time looseness of the delay-tolerant data, and the time-space hierarchical classification matching scheduling, so that the network congestion is relieved, and meanwhile, the time-space hierarchical classification matching scheduling is realized. The industrial value of the clean energy micro-grid is released, the thermal power consumption of a communication network is reduced, and low-carbon or zero-carbon transmission is realized.
Owner:UNIV OF SCI & TECH BEIJING
Boosting circuit and terminal
InactiveCN109617184ALower on-resistanceStable on-resistanceElectric powerBattery overcurrent protectionElectrical batteryCharge control
The invention provides a boosting circuit and a terminal. The boosting circuit is applied to the terminal having a rechargeable battery; the terminal comprises a battery protection module, a first transistor and a second transistor; a first input end of the boosting circuit is connected with a charging control CO (Carbon Oxide) end of the battery protection module; a second input end of the boosting circuit is connected with a discharge control DO (Dissolved Oxygen) end of the battery protection module; a first output end of the boosting circuit is connected with a control electrode of the first transistor; a second output end of the boosting circuit is connected with the control electrode of the second transistor; and the boosting circuit is used for boosting driving voltages outputted bythe CO end and the DO end in a case where the first transistor and the second transistor are controlled to be switched on so as to reduce the on-resistance of the first transistor and the second transistor. According to the embodiment provided by the invention, the on-resistance of the first transistor and the second transistor can be enabled to be lower and more stable, thereby implementing theeffect of reducing the thermal power consumption of the channel and improving the over-current detection precision.
Owner:VIVO MOBILE COMM CO LTD
A piezoelectric ceramic driving device and driving method
InactiveCN107508489BReduce thermal power consumptionIncrease input currentPiezoelectric/electrostriction/magnetostriction machinesElectricityAudio power amplifier
The invention discloses a piezoelectric ceramic driving device. The piezoelectric ceramics driving device comprises a low voltage amplification circuit and four reverse high voltage operation amplification circuits. The output of the low voltage amplification circuit is connected to input terminals of a first reverse high voltage amplification circuit and a second reverse high voltage amplification circuit. The output terminals of the first reverse high voltage amplification circuit and the second reverse high voltage amplification circuit are connected to a positive electrode of the piezoelectric ceramic input terminals of a third reverse high voltage amplification circuit and a fourth high voltage amplification circuit. The output terminals of the third reverse high voltage amplification circuit and the fourth reverse high voltage amplification circuit are connected to the negative electrode of the piezoelectric ceramic. An input signal flows out through amplification by the low voltage amplification circuit and is inputted into the first reverse high voltage amplification circuit and the second reverse high voltage amplification circuit to go through reverse high voltage amplification and then is inputted into the positive electrode of the piezoelectric ceramic and the input terminals of the third reverse high voltage amplification circuit and the fourth reverse high voltage amplification circuit to go through reverse high voltage amplification and then the input signal is inputted into the negative electrode of the piezoelectric ceramic. As a result, amplified signals which are amplified for hundreds of times are formed on two sides of the piezoelectric ceramics. The piezoelectric ceramics driving device and driving method adopt multiple high voltage operation amplifiers which are connected in parallel to perform output in order to improve output current and reduce the amount of heat generated by each high voltage operation amplifier.
Owner:TIANJIN UNIV
A psoi lateral high voltage power semiconductor device
InactiveCN103515428BReduce thermal power consumptionAlleviate self-heating problemsSemiconductor devicesPower semiconductor deviceElectrical resistance and conductance
The invention relates to the technology of semiconductors, in particular to a PSOI transverse high-voltage power semiconductor device. The transverse high-voltage MOSFET is characterized in that a second conductive type semiconductor buried layer is introduced below a source end, current carries are prevented from being too concentrated at the source end, power consumption of the device at the source end is reduced, and therefore natural heat effect of the device is improved; even doping is adopted in a first drift region of a second conductive type semiconductor, doping relatively high in concentration is adopted in a second drift region of the second conductive type semiconductor, electrical resistivity of the drift regions can be reduced, specific on-resistance of the device is reduced, and therefore power consumption of the device is reduced, and temperature of the device is lowered. The PSOI transverse high-voltage power semiconductor device has the advantages of being good in self-heating effect, low in on-resistance, high in voltage resistance, small in domain area and the like, and technological difficulty and cost are reduced.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
An astigmatic deformable mirror device
InactiveCN104076617BSmall space sizeReduce thermal power consumptionPhotomechanical exposure apparatusMicrolithography exposure apparatusOptical axisEngineering
The invention relates to an astigmatic deformable mirror device, which belongs to the field of system aberration compensation of an optical system and aims to solve the problems of difficulty in processing and manufacturing and large displacement of an introduced rigid body in the prior art. The astigmatic deformable mirror device comprises an optical element, a deformable mirror frame, four actuators, four displacement sensors, an upper fixed plate and a lower fixed plate, wherein the optical element and the deformable mirror frame are connected into a mirror frame assembly in a gluing or compressing mode; the upper fixed plate and the lower fixed plate are fixed on the deformable mirror frame respectively by screws; two actuators which are circumferentially distributed in 180 degrees are arranged on the upper fixed plate, the other two actuators which are circumferentially distributed in 180 degrees are arranged on the lower fixed plate, the four actuators on the upper fixed plate and the lower fixed plate are circumferentially distributed in 90 degrees, the actuators are arranged along the direction of an optical axis of the optical element, and input displacements vertically act on the deformable mirror frame; and the four displacement sensors are respectively arranged on the upper fixed plate and the lower fixed plate and are opposite to the four actuators.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
A Four-leaf Aberration Deformable Mirror Device
InactiveCN104076618BSmall space sizeReduce thermal power consumptionPhotomechanical exposure apparatusMicrolithography exposure apparatusOptical axisEngineering
The invention discloses a four-leaf aberration deformation mirror device which belongs to the field of system aberration compensation of optical systems and aims at solving the problems that the mounting and the detection are difficult to perform and the moving rigid body displacement is large in the prior art. The device comprises an optical element, a deformable mirror frame, eight actuators, eight displacement sensors, an upper fixed plate and a lower fixed plate, wherein the optical element and the deformable mirror frame are connected to form a mirror frame component in an adhesion or compression mode; the upper fixed plate and the lower fixed plate are respectively fixed on the deformable mirror frame through screws; four actuators which are distributed at an angle of 90 degrees in the circumferential direction are arranged on the upper fixed plate; four actuators which are distributed at an angle of 90 degrees in the circumferential direction are arranged on the lower fixed plate; the eight actuators on the upper fixed plate and the lower fixed plate are distributed at an angle of 45 degrees; the actuators are arranged along the optical axis of the optical element; input displacement vertically acts on the deformable mirror frame; the eight displacement sensors are respectively arranged on the upper fixed plate and the lower fixed plate and are opposite to the eight actuators.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Ultraviolet curing color glue and preparation method thereof
PendingCN113462345ANon-volatileNo emissionsNon-macromolecular adhesive additivesPolyureas/polyurethane adhesivesGlass fiberPolymer science
The invention discloses an ultraviolet curing color adhesive and a preparation method thereof. The ultraviolet curing color glue comprises the following components in percentage by mass: 45% of polyurethane acrylic resin; 25% of a divinyl monomer; 10% of a filler; 10% of organic toner; 4% of a photoinitiator; 4% of a dispersant; and 2% of glass fiber. The invention has the following beneficial effects: (1) the polyurethane acrylic resin and the divinyl monomer have 100% solid content, solvent volatilization and carbon emission are avoided, and the environment is protected; (2) the curing condition is that an ultraviolet curing lamp is used, the curing speed is high, and the curing can be completed within 3 minutes, so that the thermal power consumption is very low, the production efficiency is improved, and the energy is saved; (3) the whole production device is more compact in design and easy to process, the field area is saved, and the space utilization rate is improved; (4) the formed integrated color glue is good in hardness and acid corrosion resistance.
Owner:TIANNENG BATTERY GROUP
Probe card capable of replacing electronic accessory rapidly
InactiveCN1963531BEasy to replaceMaintain electrical measurement qualityElectrical measurement instrument detailsElectrical testingProbe cardEngineering
This invention relates to rapid update electron parts probe card, which comprises one circuit board, multiple probes and several container sockets, wherein, the circuit board is set with electron circuit connected to the passive elements joints; detect probes is connected to electrical circuit; probe card is to test by detector; each container socket is set with two conductive fix parts on the points to form one container part and at least on open; the container parts are to contain above passive element to connect two fix parts through open to transfer each passive element.
Owner:MPI CORP
Anti-backfeed protection circuit
ActiveCN105244864BAvoid enteringSolve the problem of high power consumptionEmergency protective circuit arrangementsMOSFETComparators circuits
The invention provides an anti-backflow protection circuit, which is electrically connected between an input circuit and an output circuit. The anti-backflow protection circuit includes: a reference voltage supply circuit, a voltage comparison circuit and an anti-backflow circuit. The voltage comparison circuit includes a current sense resistor. The output terminal of the reference voltage supply circuit is connected to the first input terminal of the voltage comparison circuit, the negative terminal of the input circuit is connected to the negative terminal of the output circuit through the current detection resistor, and the feedback voltage formed on the current detection resistor acts on the second input terminal of the voltage comparison circuit. The anti-backflow circuit includes a P-channel MOSFET. The voltage comparison circuit compares the reference voltage and the feedback voltage, and controls the working state of the P-channel MOSFET through the output end of the voltage comparison circuit to prevent the back-feed current from entering the input circuit from the output circuit. The technical problem of large power consumption and large heat dissipation when the diode is used to realize anti-backflow in the prior art is solved.
Owner:SICHUAN HUIYUAN OPTICAL COMM CO LTD
A DC series excitation motor control system and method
ActiveCN109546906BLow costReduce thermal power consumptionDC motor rotation controlDC commutatorElectric machineControl system
The invention provides a novel direct current series excited motor control system and method. The novel direct current series excited motor control system includes a DC power supply UDC, and includesa first branch circuit and a second branch circuit which are connected to the DC power supply UDC in series, wherein the first branch circuit includes a third branch circuit and a fourth branch circuit which are connected in parallel; the third branch circuit includes a first IGBT module and a second IGBT module which are connected in series; and the fourth branch circuit includes a third IGBT module and a fourth IGBT module which are connected in series. The novel direct current series excited motor control system can realize contactless smooth commutation of a direct current series excited motor through an electric power electronic device, can integrate commutation with motor modulation, can reduce the cost and heat dissipation of the system, and can improve the system efficiency.
Owner:WUHAN ZHENGYUAN ELECTRIC
A control method and device for a Doherty power amplifier
ActiveCN106301234BImprove power amplifier efficiencyGuaranteed linearityAmplifier modifications to reduce non-linear distortionAmplifier modifications to raise efficiencyCarrier signalEngineering
The present invention discloses a Doherty power amplifier control method and apparatus, wherein the method comprise: obtaining an output state of a Doherty power amplifier, wherein the Doherty power amplifier comprises a carrier power amplifier and a peak value power amplifier; and adjusting a grid voltage of the carrier power amplifier according to the output state of the Doherty power amplifier, so that the carrier power amplifier switches from a B-type working state to an AB-type working state in a process in which output power of the Doherty power amplifier decreases from a saturation state to power corresponding to a regression amount of the Doherty power amplifier. According to the Doherty power amplifier control method and apparatus, the grid voltage of the carrier power amplifier is adjusted according to the output state of the Doherty power amplifier, to change a working state of the carrier power amplifier, thereby improving efficiency of the Doherty power amplifier and ensuring linearity of the Doherty power amplifier.
Owner:DYNAX SEMICON
Motor speed regulation plate and motor system
PendingCN114421831AReduce hardware costsReduce thermal power consumptionAssociation with control/drive circuitsDC motor speed/torque controlMotor speedCapacitance
The invention discloses a motor speed regulation board which comprises a controller, a driving circuit and a switching circuit, the controller outputs a control signal to the driving circuit after receiving an external control signal related to motor speed regulation, and the driving circuit completes chopping by controlling the on-time and the off-time of a switching tube in the switching circuit. And the motor completes speed regulation according to the duty ratio after acquiring a switching signal of the switching circuit. Compared with the prior art, according to the scheme, a filter inductor and a filter capacitor are removed from the speed regulation circuit, meanwhile, the power loss of a filter part is removed, the additional heat power consumption of the system is reduced, and the speed regulation efficiency of the system is improved. Meanwhile, a large-current inductor is not needed for filtering, so that the hardware cost of the speed regulation system is reduced. In addition, the invention further discloses a motor system, the motor system comprises the motor speed regulation plate, and the above beneficial effects can be achieved correspondingly.
Owner:SHENZHEN ENVICOOL INFORMATION TECH CO LTD
Single row carrier photodetector and method of making the same
ActiveCN106784123BAvoid gatheringIncrease drift speedFinal product manufactureSemiconductor devicesPhotodetectorDislocation
The invention discloses a single-line carrier photodetector and a manufacturing method thereof. The photodetector includes a substrate, an epitaxial layer and an electrode, and the epitaxial layer includes an assembly layer, a cliff layer, a conduction layer, and an absorption layer stacked in sequence. and a blocking layer, the absorbing layer adopts graded doped InGaAs, the blocking layer adopts AlxIn1-xAs, 0<x<1. The present invention adopts AlxIn1-xAs material as the barrier layer and the assembly layer; the conduction layer InGaAlAs with graded composition is used to smooth the band gap between InGaAs and InAlAs, realize lattice matching, reduce the dislocation density at the heterogeneous interface and prevent electrons from The aggregation of heterogeneous interfaces accelerates the drift speed of electrons. At the same time, the doping concentration of the assembly layer presents a gradient change. On the one hand, it can effectively weaken the space charge effect, reduce the thermal power consumption of the device, and increase the saturation output current of the device; on the other hand, it can effectively weaken the speed overshoot effect and obtain a small voltage. Depends on bandwidth and better linear response.
Owner:SUZHOU SUNA PHOTOELECTRIC
Micro-heating device used in planar optical waveguide thermo-optic devices and manufacture method therefor
InactiveCN100495095CReduce widthEasy to makeCoupling light guidesOptical waveguide light guideTransmission channelMiniaturization
This invention relates to one plane light wave heat conductive part micro heating device, which comprises light transmission channel, two contact point connected to outer power to connect light transmission channel through connection arm, wherein, the light transmission channel is of rip light wave guide orderly depositing isolation layer, chip layer, upper pack layer and heat electrode film on underlay; two contact points and connection arm has same layer structure in height direction. The process method comprises steps of etching to form light transmission channel, connection arm and contact point; then using etch method to form micro heating device.
Owner:ZHEJIANG UNIV
Camera drive motor low in power consumption
InactiveCN104219426AAvoid useless workReduce thermal power consumptionTelevision system detailsColor television detailsEngineeringDrive motor
The invention provides a camera drive motor low in power consumption. Multiple elastic parts, which are disposed at two ends of a carrier, of the camera drive motor jointly acts on the carrier to allow the initial state stress of the carrier to be balanced. The carrier is suspended relative to a base by the elastic part disposed at the lower end of the carrier. When the drive motor starts to work, certain displacement, relative to the base, of the initial state of the carrier exists, the carrier starts to move under magnetic field force, idle work of the drive motor in the initial state is avoided, heat power consumption is reduced greatly, the carrier can move bidirectionally in the initial state, the moving journey of the drive motor is increased, and various shooting requirements are satisfied.
Owner:HUIZHOU YOUHUA MICROELECTRONICS TECH
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