28results about How to "High power output" patented technology

The invention belongs to the technical field of photovoltaic backboards, and particularly relates to a high-reflection integrally-formed backboard for a single-glass assembly and a preparation method thereof.The preparation method comprises the following steps that S1, a PET film base material is provided, plasma surface treatment is conducted, then polyurethane coating is coated on the two sides to form an outer-layer weather-proof fluorine coating and an inner-layer functional coating respectively, and the outer-layer weather-proof fluorine coating and the inner-layer functional coating are formed; a CPC backboard base material is obtained; s2, white high-reflection EVA granules are fused and plasticized, a white EVA adhesive film is obtained through extrusion of a hanger type T-shaped flat die head, then the white EVA adhesive film is compounded with the inner functional coating of the CPC backboard base material, and a firm complex without a definite physical interface is obtained through rolling; s3, cooling the composite body through at least two stages of cooling rollers to obtain a coiled material; and S4, the coiled material is irradiated, and the high-reflection integrally-formed backboard is obtained.

The invention provides a broadband gain positive slope amplitude-phase control multifunctional chip for a T / R assembly, which relates to the technical field of radio frequency integrated circuits and comprises a receiving channel, a transmitting channel, an equalization circuit, a numerical control attenuator, a numerical control phase shifter, a transmitting-receiving change-over switch module and a parallel control module. The parallel control module is used for outputting parallel control signals to the numerical control attenuator, the numerical control phase shifter and the transceiving change-over switch module; the equalization circuit is respectively connected with the receiving channel and the transmitting channel through the transmitting-receiving change-over switch module, so that a signal path of the receiving channel and a signal path of the transmitting channel multiplex the equalization circuit, the numerical control attenuator and the numerical control phase shifter; and the equalization circuit is of an on-chip integrated structure and is used for adjusting the gain of the receiving channel and the gain of the transmitting channel to present a positive slope characteristic relative to the frequency in a wide frequency band so as to compensate the frequency attenuation of an external device.

The invention discloses a slice laser based on a topological structure dodging layer. The slice laser comprises a pumping system, a pumping light injection module and a composite dodging waveguide structure, pumping light generated by the pumping system enters the composite dodging waveguide structure through the pumping light injection module; the front end face of the composite dodging waveguide structure is plated with a pumping light wavelength high-reflective film and a laser wavelength antireflection film, and the rear end face of the composite dodging waveguide structure is plated with a pumping source wavelength and laser wavelength high-reflective film; the composite dodging waveguide structure comprises a slice gain medium, a topological structure dodging layer and a middle refractive index layer which are sequentially arranged from the front end face to the rear end face. The topological structure dodging layer is composed of a low-refractive-index material layer and a high-refractive-index material topological graph arranged on the low-refractive-index material layer; and the pump light injection module is fixed above the high refractive index material of the middle refractive index layer or the topological structure dodging layer. Pumping uniformity is improved fundamentally, high-order mode suppression and efficient fundamental mode extraction are facilitated, and output power and light beam quality are improved at the same time.

The present application relates to the technical fields of intelligent sensing of bridges, and particularly relates to an energy collection device arranged at a bridge expansion joint, a design method and a bridge expansion joint monitoring mechanism, comprising: a conversion unit arranged in a bridge expansion joint structure, capturing the strain of the structure after being stressed, and generating an alternating flexoelectric signal; a base layer located between the conversion unit and the bridge expansion joint, adjusting the strain distribution of the conversion unit; a rectification unit integrated with an impedance matching circuit, connected with the conversion unit, converting the alternating flexoelectric signal into a direct current, and delivering it to an energy storage unit; compared with the prior art, the beneficial effects of the present application are: the present application relates to a monitoring mechanism of a bridge expansion joint, the device has a self-powered structure based on the flexoelectric effect, without external power supply, significantly reducing the wiring and maintenance cost, at the same time, the monitoring unit realizes millimeter level displacement resolution and real-time structure health assessment, ensuring the structural safety of the bridge expansion joint.

This invention relates to the field of motor technology and discloses a high-power-density permanent magnet motor for unmanned aerial vehicles (UAVs). The motor includes a stator with a winding section and a frequency conversion section. The winding section is arranged in a ring array around the center of the stator, allowing for different coil combinations on a single winding. The winding section includes slots A, B, and C. Slot A is located on the inner wall of the stator, while slots B and C are located on the stator itself. The inner wall of the stator also has inlet holes A, B, and C. Inlet holes A and B communicate with slot A, and inlet holes B and B communicate with slot B. The motor employs a wide-range speed control to adapt to UAV operating conditions, featuring a six-speed adjustment function. The rated speed ranges from 8 r / min (8 Hz) to 48 r / min (48 Hz), and the speed ratio can reach 1:8 during weak field operation. This allows for precise matching of the power requirements of different stages of UAV operation, such as takeoff, cruise, and high-speed flight, achieving full operating condition coverage without motor replacement.

The utility model discloses a kind of control circuit of high-power optical fiber amplifier, it is related to optical fiber amplifier technical field, high-power optical fiber amplifier includes the first stage gain unit and second stage gain unit sequentially arranged along the transmission direction of light;Control circuit includes the control module, first gain control ring and second gain control ring connected;When starting optical fiber amplifier, control module controls first gain control ring to start first stage gain unit, and the output light power of first stage gain unit is collected, control module controls second gain control ring to start second stage gain unit when the output light power of first stage gain unit is greater than threshold light power;When closing optical fiber amplifier, control module first controls second gain control ring to close second stage gain unit, then controls first gain control ring to close first stage gain unit.The control circuit can improve the security and reliability of the high-power optical fiber amplifier application.

Systems and methods (100) for estimating when an engine event occurs is described. The system includes a controller configured to receive a first signal from at least one knock sensor coupled to a combustion engine, receive a second signal from at least one engine crankshaft sensor coupled to the combustion engine, transform the first and second signals into a plurality of feature vectors using a multivariate transformation algorithm, determine an expected window of an engine event with a statistical model, center a segment of the plurality of feature vectors around the expected window, estimate, using the statistical algorithm, a time in the expected window corresponding to when the engine event occurred, and adjust operation of the combustion engine based on the time.

The application discloses a high-power semiconductor laser fiber coupling system based on total reflection and belongs to the technical field of lasers. The system comprises two groups of semiconductor laser array modules, a fast-slow axis collimating mirror array, a dichroic mirror for wavelength beam combining, a reflecting mirror for light path folding, a beam shrinking device and a focusing mirror for coupling light beams into an optical fiber; an isosceles right prism group based on total reflection is used to fill the dark area in the fast axis direction. The wavelengths of the array modules in each group of semiconductor laser array modules are the same, the semiconductor laser fiber coupling system can achieve the purpose of beam shaping and obtain high-power output, and compared with the traditional method, the structure is simple and compact.

This application provides an external cavity laser and a lidar. The external cavity laser includes an active multimode gain chip and a passive optical chip. The active multimode gain chip and the passive optical chip are coupled together. The active multimode gain chip provides a multimode beam, which is then fed back to a single-mode source and output by the passive optical chip. The lidar includes a light source, a beam splitter, a phased array antenna, and a detection module, and includes the aforementioned external cavity laser. This application solves the technical problem of low power output in external cavity lasers in related technologies, thereby improving the power output of external cavity lasers.

The utility model discloses a kind of gas air mixing device and gas water heater, it relates to water heating device field, comprising: for input gas gas passage;For input air first air passage and second air passage;With the first gas output portion and the second gas output portion of the gas passage intercommunication;Mixed gas passage is set in the first air passage, second air passage, first gas output portion, second gas output portion downstream;Flow regulating component is at least partially arranged in the first air passage and can move along the extension direction of the first air passage, air inlet in the gas air mixing device can drive the flow regulating component moves to adjust the opening of the first air passage and the first gas output portion;The second air passage and the second gas output portion are normally open state.This application can solve the problem that flow regulation range is relatively narrow.

A one-way automatic cutting valve weld method and a one-way automatic cutting valve weld device, comprising the following steps: S1 unlocking the safety mechanism; S2 adjusting the cutting height of the automatic lifting mechanism; S3 clamping the valve by the clamping mechanism; S4 cutting the valve weld by the ratchet automatic cutting mechanism, including a machine base, one side of the machine base is connected with an automatic lifting mechanism, the machine base is provided with an electric drive mechanism for changing the direction of movement and a clamping mechanism for clamping the valve, and the electric drive mechanism is connected and provides power for the ratchet automatic cutting mechanism for automatically cutting the valve weld. The device adopts the working method of the ratchet mechanism, realizes one-way cutting of the valve weld, uses the electric drive mechanism to drive the ratchet wrench to continuously rotate within a certain angle to realize automatic cutting of the cutting tool on the sealing valve weld, and greatly reduces the time when the artificial needs to be in the high-concentration nuclear radiation during cutting.

The invention belongs to the technical field of high-power microwaves, and particularly relates to an ultra-high-power ultra-large-radius coaxial backward wave tube which is particularly suitable for national defense and military application. According to the ultra-large-radius coaxial corrugated backward wave tube, on the basis that the difference between the inner radius and the outer radius of a fundamental wave (TEM wave) is not changed, by increasing the center radius of a slow wave device and keeping the electron beam voltage and current density unchanged, the input current is increased in an equal proportion mode, and the output power is increased in a year-on-year mode. The problem that the power of an existing slow-wave device is limited can be solved.

The invention discloses a lithium-rich manganese-based positive electrode material compositely coated with an alpha-ZrP-conducting polymer, a preparation method of the lithium-rich manganese-based positive electrode material and application of a solid-state battery. According to the material, a bulk phase modified lithium-rich manganese-based material is used as a core, and a composite coating layer composed of a delaminated alpha-ZrP nanosheet and a conductive polymer is constructed on the surface of the lithium-rich manganese-based material. The composite coating layer can realize internal proton self-exchange response with the conductive polymer based on the solid acid characteristic of alpha-ZrP, and an overpass type rapid ion-electron dual-transmission channel is formed in the material body. Meanwhile, the coating layer is used as a compact physical and chemical barrier, and harmful side reactions between the positive electrode and the solid electrolyte are effectively blocked. When the prepared positive electrode material is applied to a solid-state battery, high first-circle coulombic efficiency and excellent cycling stability and rate capability are shown, and the two core problems of unstable interface and slow dynamics of a lithium-rich manganese-based material in the solid-state battery are effectively solved.

The application discloses a K-band transit-time oscillator based on a last pre-cavity extraction structure, which comprises an inner cylinder and an anode outer cylinder sleeved outside the inner cylinder, a circular annular cavity is formed between the inner cylinder and the anode outer cylinder, the cavity comprises a first drift tube, a first modulation cavity, a second drift tube, a second modulation cavity, a third drift tube, an extraction cavity and a first coaxial output waveguide which are sequentially communicated, the output end of the anode outer cylinder is further provided with a circular annular second coaxial output waveguide, the first coaxial output waveguide and the second coaxial output waveguide are coaxially arranged, the second modulation cavity is further communicated with the second coaxial output waveguide, and the K-band transit-time oscillator is rotationally symmetrical about the central axis of the inner cylinder. The application verifies the feasibility of extracting microwave by the last pre-cavity, and realizes higher efficient output and higher power output.

The application provides a motor stator and a motor. The motor stator comprises a stator core (1) provided with a winding mounting groove (11); a winding partially accommodated in the winding mounting groove (11), the winding comprising a plurality of wires (2), and a plurality of the wires (2) are arranged along a radial direction (R) of the motor stator in the winding mounting groove (11); and an elastic member (3) arranged in the winding mounting groove (11), the elastic member (3) is arranged between at least two adjacent wires (2) in an axial direction (A) of the motor stator, and an inner part of the elastic member (3) forms one or more cooling oil channels.

This invention discloses an aerodynamic design method for a biomimetic tower-type wind turbine, comprising: 1) using 3D modeling software to biomimeticly model the geometric shape of the wind turbine tower and determine its dimensions; 2) employing numerical simulation to study the aerodynamic characteristics of the biomimetic tower and cylindrical tower; 3) 3D printing the tower model with uniformly distributed pressure measurement holes; 4) arranging a wind tunnel testing device; 5) using wind tunnel testing to collect data and study the aerodynamic characteristics of the biomimetic tower and cylindrical tower; 6) using 3D modeling software to model the wind turbine blades, hub, and nacelle, and applying the designed biomimetic tower combined with rotating blades to a horizontal axis wind turbine; 7) employing numerical simulation to compare the simulation results of the biomimetic tower-type wind turbine and the cylindrical tower-type wind turbine. This invention directly addresses the tower shape design, with simple and efficient optimization steps, and exhibits good drag reduction, vibration suppression, and wake improvement effects, thereby increasing the wind turbine's output power.

The application provides a Debye temperature operating laser device, which comprises a vacuum cavity, a laser gain medium and a heat sink sample table located in the vacuum cavity, the heat sink sample table is used to fix the laser gain medium, a pumping module is used to provide pumping light for the laser gain medium, and a temperature adjusting module is correspondingly matched with the heat sink sample table, the temperature adjusting module is configured to adjust the temperature of the heat sink sample table so that the working temperature of the laser gain medium is stably kept at the Debye temperature. The Debye temperature operating laser device is used to realize the operation of the laser gain medium at the Debye temperature, which can theoretically improve the thermal and optical performance, obtain laser output with high power, high beam quality and high efficiency, and provide support and impetus for the application and development of laser technology.

The application provides a high-speed, high-efficiency and low-cost semiconductor optical communication device and a preparation method thereof. The high-speed, high-efficiency and low-cost semiconductor optical communication device comprises a first Bragg reflector, first to Nth active layers arranged in sequence along a first direction on one side of the first Bragg reflector, wherein N is an integer greater than or equal to 2; first to N-1th tunnel junctions, wherein any nth-1th tunnel junction is located between an nth-1th active layer and an nth active layer, n is an integer greater than or equal to 2 and less than or equal to N; first to N-1th current limiting layers arranged along the first direction, wherein any nth-1th current limiting layer is located on the side of the nth-1th tunnel junction along a second direction, and the nth-1th current limiting layer has an overlapping projection on the sidewall of the nth-1th tunnel junction along the second direction; and wherein the second direction is perpendicular to the first direction.

The enhanced coreless stator comprises a substrate, a stator winding is arranged on the substrate, the stator winding comprises an effective conductor section for cutting axial magnetic flux, the effective conductor section is in a sheet shape, and the main plane of the effective conductor section is not parallel to the plate surface of the substrate. According to the coreless stator, the relative position relation between the effective conductor sections and the substrate is changed, so that the single effective conductor section has a traditional current flowing cross section and also has higher resistance to magnetic acting force, and the coreless stator is higher in structural strength and more stable in operation. Meanwhile, the occupied area of the axial projection of the sheet-shaped effective conductor section on the substrate is small, and more stator windings can be distributed on the substrate with the same area. The single-turn structural strength and the number of turns per unit area are synchronously improved, the overall structural strength of the stator is remarkably enhanced, meanwhile, the energy density of the motor is improved, and higher power output is achieved.

This invention discloses a wide-range radio frequency power conversion system based on an asymmetric hybrid structure and hybrid modulation. It adopts an input parallel, output series architecture, consisting of a main power regulation module and several auxiliary power modules. The main power regulation module includes a front-stage Buck-Boost converter and a rear-stage dual-parallel full-bridge resonant unit, possessing fine voltage and phase adjustment capabilities. The auxiliary power modules are simplified full-bridge units, responsible only for discrete power switching. The system employs a hybrid modulation strategy, utilizing phase-shift control of the main power module in the low-power range, DC bus voltage regulation of the main power module in the medium-power range, and full-bridge / bypass mode switching of the auxiliary power modules in the high-power range, achieving smooth and continuous adjustment from zero to rated power. This architecture, through optimized design of resonant network parameters and utilization of the internal resonant circulating current generated by the main module in phase-shift state, ensures zero-voltage switching (ZVS) operation across the entire range, significantly reducing system hardware costs and control complexity while significantly improving system efficiency in power back-off state.

This invention belongs to the field of radio frequency integrated circuit technology and discloses a stacked broadband radio frequency amplifier and its wireless transceiver circuit. The stacked broadband radio frequency amplifier includes an input impedance matching network, a first stacked amplifier circuit, a second stacked amplifier circuit, and an output impedance matching network. The input terminal of the input impedance matching network serves as the input terminal of the stacked broadband radio frequency amplifier and is connected to the radio frequency signal input terminal. The output terminal of the input impedance matching network outputs the radio frequency signal to the first stacked amplifier circuit. After receiving the radio frequency signal, the input terminal of the first stacked amplifier circuit outputs a first-stage amplified radio frequency signal. After receiving the first-stage amplified radio frequency signal, the first stacked amplifier circuit further amplifies and outputs a second-stage amplified radio frequency signal. The input terminal of the output impedance matching network receives the second-stage amplified radio frequency signal and outputs the amplified radio frequency signal. The amplifier structure of this invention is simple and has excellent high power output, low phase distortion, and wide temperature stability.

This invention belongs to the field of lithium-ion capacitor technology, specifically relating to a lithium-ion capacitor with a porous carbon positive electrode and a hard carbon negative electrode, and its preparation method. Pretreated coal powder and KOH powder are carbonized in a tube furnace at a mass ratio of 1:(3~5) to obtain porous carbon as the positive electrode material; the pretreated coal powder is carbonized in a tube furnace at 1200~1600℃ to obtain hard carbon as the negative electrode material; the positive and negative electrode materials are assembled at a mass ratio of (1~3):1 to obtain a lithium-ion capacitor with good electrical performance. The porous carbon prepared by this invention has a hierarchical pore structure, high specific surface area, and suitable defect density, providing high specific capacitance; the hard carbon prepared by this invention has a composite structure of short-range ordered graphite-like microcrystals and amorphous carbon, which is conducive to rapid lithium-ion insertion / extraction, providing a capacity basis; the appropriate assembly ratio of the porous carbon positive electrode material and the hard carbon negative electrode material effectively improves the overall performance of the lithium-ion capacitor.

The utility model relates to a heat dissipation mechanism, in particular to a heat dissipation mechanism of a high-pressure diesel generating set, which comprises a circulation box, and a liquid inlet pipe, a first liquid outlet pipe and a second liquid outlet pipe are fixedly mounted on the circulation box. A ball seat is further included. A first pipeline and a second pipeline are fixedly mounted on the ball seat; a ball tube is rotationally and hermetically connected in the ball seat, and a channel is formed in the ball tube; a liquid pump; the heat dissipation piece comprises a heat dissipation pipeline; the LED lamp further comprises a switching piece, and the heat dissipation piece acts to drive the bulb tube to rotate so that the channel can be communicated with the second pipeline. In the initial stage of starting, the heat dissipation piece does not work, at the moment, heat generated by the diesel generator can rapidly increase the temperature of cooling liquid in the circulation box to the optimal working temperature, and therefore the situation that power output is delayed after the unit is started due to the fact that the temperature of the cooling liquid rises slowly in the initial stage of starting is avoided; when the temperature of the cooling liquid reaches the optimal working temperature, the heat dissipation piece maintains the temperature of the cooling liquid, and performance reduction and service life shortening of the diesel generator caused by over-high temperature of the cooling liquid are avoided.

The utility model relates to an electric drive axle which is used for an electric truck, the electric drive axle is provided with a main drive motor, a speed reducer assembly and a differential mechanism assembly, the speed reducer assembly is provided with a first-level speed reduction level, a first-gear transmission mechanism, a second-gear transmission mechanism, a third-gear transmission mechanism, a first gear shifting mechanism and a second gear shifting mechanism, the first speed reduction stage is composed of a first speed reduction driving gear and a first speed reduction driven gear which are meshed with each other, the first speed reduction driving gear is fixedly supported on a motor shaft, and the first-gear transmission mechanism is composed of a planetary gear reducer, a first driving gear and a first driven gear. The second-gear transmission mechanism is composed of a planet carrier of the planetary gear reducer, a first driving gear and a first driven gear, and the third-gear transmission mechanism is composed of a second driving gear and a second driven gear, the torque of the main drive motor is transmitted to the differential mechanism assembly through the first-stage speed reduction stage and the first-gear transmission mechanism or the second-gear transmission mechanism or the third-gear transmission mechanism.

The present disclosure relates to the technical field of photovoltaic devices, and provides a photovoltaic module and a photovoltaic system. The photovoltaic module comprises a cell, a busbar and an insulating member. The front surface and the back surface of the cell are respectively provided with a solder strip. The busbar is located at the back surface edge of the cell. The insulating member is located between the cell and the busbar, and is used for insulating and separating the cell and the busbar. The busbar has a protruding part protruding along the thickness direction of the cell. The protruding part has a top surface flush with the front surface of the cell, and a side surface opposite to the side of the cell. The solder strip located on the front surface of the cell can be welded with the top surface, and the solder strip located on the back surface of the cell can pass through the insulating member and be welded with the side surface. The photovoltaic system comprises the photovoltaic module. The busbar of the photovoltaic module and the photovoltaic system can be arranged on the back surface of the cell, and does not occupy the space of the front surface of the cell. The distance between the busbar and the cell is only one insulating member, so that the overall thickness is relatively thin, and the structure is more compact. In addition, the busbar or the solder strip does not need to be bent, so that the risk of hidden cracks of the cell is avoided.

A rotary heat engine (100) includes a rotor (200) centered about and rotatable about a rotational axis (202), and a stator (300) surrounding the rotor (200), the stator (300) defining the rotor (200). The rotor (200) is rotatable relative to the stator (300). The stator (300) defines a radially inner surface (304) that faces the radially outer surface (204) of the rotor (200). The rotor radially outer surface (204) defines at least one rotor combustion chamber (210) having a leading edge (212) and a trailing edge (214). The stator radially inner surface (304) defines at least one stator combustion chamber (310) having a leading edge (312) and a trailing edge (314). The number of rotor combustion chambers (210) is not equal to the number of stator combustion chambers (310).

The invention discloses a carbon cloth-based composite material, a preparation method and application in a supercapacitor, and belongs to the technical field of supercapacitor electrode materials, and the method comprises the following steps: dissolving nickel nitrate hexahydrate, copper nitrate pentahydrate and an organic ligand containing carboxyl and amino in N-methyl pyrrolidone, adjusting the pH value to 6.07.0, and stirring to form a uniform mixed solution; the preparation method comprises the following steps: carrying out ultrasonic and microwave synergistic activation on pretreated carbon cloth, immersing the carbon cloth in a mixed solution for gradient heating solvothermal reaction to obtain a flexible Ni-Cu bimetal MOF / carbon cloth composite material, immersing the flexible Ni-Cu bimetal MOF / carbon cloth composite material in a composite vulcanizing agent solution prepared from thioacetamide and potassium sulfide, and sequentially carrying out segmented water bath vulcanization and gradient calcination treatment to obtain the flexible Ni-Cu bimetal MOF / carbon cloth composite material. The carbon cloth-based composite material is obtained. The flexible core-shell porous sulfide / carbon cloth composite material with high specific surface area, high specific capacitance, excellent cycle stability and low internal resistance is prepared, the process is mild, the solvent can be recycled, and the composite material has good industrial economy and environmental friendliness.

The invention relates to the technical field of traction motors, and provides a traction motor and equipment, and the traction motor comprises a housing, a stator assembly, a rotor assembly, a central shaft, and an end cover assembly. The outer air cooling system comprises an outer air cooling driving part and an outer air cooling channel, and an outer air inlet and an outer air outlet are formed in the end cover assemblies at the two axial ends correspondingly and communicate with the outer air cooling channel correspondingly. The water-cooling system comprises a water-cooling water inlet, a water-cooling air outlet and a water-cooling channel which are located on the machine shell, in the radial direction of the machine shell, the water-cooling channel is located on the inner side of the outer air-cooling channel, the axial air channel design enables airflow to penetrate through the whole machine shell in the length direction, local overheating is avoided, and temperature distribution is more uniform. The water-cooling channel is radially located on the inner side, clings to the stator core or the inner wall of the casing, directly absorbs main heat in the motor, and is short in heat conduction path and small in thermal resistance; and the magnetic field distortion influence caused by magnetic conduction impurities and the like in the outer air cooling channel is reduced.