2222 results about "Energy conversion efficiency" patented technology

The invention provides a self-adaptive power supply energy-saving configuration method and system based on energy gradient utilization, and relates to the technical field of power supply management, and the method comprises the steps: collecting the operation parameters of electric equipment, building a power utilization model, and carrying out the self-adaptive correction; constructing a multi-stage energy distribution matrix according to the corrected power utilization model, and performing energy efficiency grading on the power utilization equipment; performing spatial-temporal feature extraction by adopting a bidirectional attention mechanism, generating an electric equipment priority strategy in combination with a self-calibration network, and further calculating an energy distribution proportion of each level of electric equipment; and finally, generating a control signal according to the energy distribution proportion, adjusting the power supply power of each stage of electric equipment, distributing the exceeded power to the electric equipment with the secondary high energy conversion efficiency when the power value exceeds a target power threshold value, and outputting a self-adaptive energy balance control instruction according to the prediction control model to adjust the operation state of the electric equipment.

The invention discloses a control system for a photovoltaic energy storage inverter, and the system comprises a maximum power point tracking module which is used for adjusting the output of a photovoltaic panel after the photovoltaic energy storage inverter receives a power input signal, optimizing the energy collection, a dynamic adjustment module which is used for adjusting the output of the photovoltaic panel based on the power grid fluctuation and load change parameters which are monitored in real time, the control system of the photovoltaic energy storage inverter comprises a control module used for dynamically adjusting the output frequency and voltage of the inverter and achieving efficient conversion and matching of electric energy, and a closed-loop feedback module used for continuously adjusting the output parameters of the inverter until the output parameters reach a preset energy conversion efficiency threshold value. The system is ensured to be always in an optimal operation state, and unpredictable factor changes are accurately and intelligently adapted, so that the overall conversion efficiency of the photovoltaic energy storage system is improved.

The invention discloses a multi-source sensing fusion highway slope geological disaster real-time early warning method, particularly relates to the technical field of safety early warning and monitoring, and is used for solving the problem that an existing fusion system fails to report due to multi-source data false consistency in the early stage of deep hidden catastrophe. By collecting slope multi-source geological parameter time series data, energy conversion efficiency differential entropy mutation is analyzed to generate an abnormal association mark; constructing a co-evolution matrix in a marking state; searching a space-time overlapping region of a main deformation parameter second derivative zero point and an auxiliary parameter frequency domain extreme point in the matrix, and marking a phase change critical state by comparing geological history envelope lines; performing hidden variable decoupling on the critical state matrix, and generating a hidden catastrophe risk index based on the spatial similarity of the main feature vector and the catastrophe mode vector; and when the risk index continuously exceeds the dynamic critical value and the frequency domain characteristic is in an unstable evolution state, an early warning signal is generated, the deep catastrophe critical state is effectively identified, and missing report caused by safety illusion is avoided.

The invention discloses a fuel cell hydrogen circulation cooling integrated system, and relates to the technical field of fuel cells, the fuel cell hydrogen circulation cooling integrated system comprises a hydrogen circulation cooling management center, the hydrogen circulation cooling management center is in communication connection with the following modules: a multi-source state sensing module, which is used for collecting multi-dimensional state data of a hydrogen circulation-cooling system in real time, extracting state characteristics, and sending the state characteristics to a control module; and forming a state feature sequence table. The multi-dimensional state data of the hydrogen circulation-cooling system is collected, the dynamic cooperative control strategy of the reinforcement learning decision module is combined, the precision and stability of temperature control are remarkably improved, the Markov decision process model is used for predicting the instantaneous heat production change caused by load sudden change, and the stability of the system is improved. And through combined adjustment of hydrogen circulation and a cooling system, temperature fluctuation is rapidly restrained, compared with traditional PID control, the temperature overshoot is reduced under the dynamic working condition, it is ensured that the galvanic pile works within the optimal temperature range all the time, the service life of the galvanic pile is prolonged, and the energy conversion efficiency is improved.

The invention discloses a heat supply system capable of storing energy across seasons based on renewable energy sources, relates to the technical field of renewable energy source utilization, and solves the problems of response lag, energy efficiency reduction and poor system stability caused by reaction kinetics nonlinearity and long-term operation uncertainty in an existing heat supply system. The system comprises an environmental data acquisition module, a dynamic load prediction module, a heat storage reaction control module, a nonlinear compensation module, a material performance monitoring module and a long-term operation management module. Real-time response to external environment changes, accurate prediction of heat supply requirements, dynamic adjustment of reaction conditions, continuous monitoring of material performance and optimization adjustment of operation strategies are achieved; through cooperative work of multiple modules, the quick response capacity and energy conversion efficiency of the system on external load changes are remarkably improved, the side reaction risk is effectively restrained, the service life of the system is prolonged, and long-term stable and efficient operation of the energy storage and heat supply system in a complex environment is guaranteed.

Highly transparent (up to 92% light transmittance) wood composites have been developed. The process of fabricating the transparent wood composites includes lignin removal followed by index-matching polymer infiltration resulted in fabrication of the transparent wood composites with preserved naturally aligned nanoscale fibers. The thickness of the transparent wood composite can be tailored by controlling the thickness of the initial wood substrate. The optical transmittance can be tailored by selecting infiltrating polymers with different refractive indices. The transparent wood composites have a range of applications in biodegradable electronics, optoelectronics, as well as structural and energy efficient building materials. By coating the transparent wood composite layer on the surface of GaAs thin film solar cell, an 18% enhancement in the overall energy conversion efficiency has been attained.

The invention discloses a double-channel hydrogen production system optimization control method for a multi-power-supply scene, and the method comprises the steps: constructing a double-channel hydrogen production system, and obtaining corresponding operation data; decomposing and reconstructing based on the operation data to obtain the initial input power of the electrolytic cell; formulating a start-stop rule of the electrolytic cell based on the initial input power; correcting the initial input power based on a start-stop rule to obtain actual hydrogen production power; an electrolytic cell mathematical model is constructed, and the unit hydrogen production cost and the energy conversion efficiency are obtained based on the actual hydrogen production power; establishing a target function based on the unit hydrogen production cost and the energy conversion efficiency; and optimizing the target function based on a multi-target particle swarm algorithm to obtain an optimal filtering reconstruction order and an electrolytic cell retention ratio, and completing power distribution and optimal capacity configuration of the double-channel hydrogen production system. Power division and capacity configuration of the alkaline electrolytic bath and the PEM electrolytic bath are achieved, the hydrogen production cost of the wind-solar coupled system is effectively reduced, and the energy conversion efficiency of the electrolytic bath is improved.

The present invention relates to a wave energy power generation buoy with a variable length and angle damping plate and its control method, belonging to the technical field of wave energy power generation buoys. It includes a main floating body, an air turbine and a damping plate. The main floating body is a hollow rear-bent pipe structure. The air turbine is installed at the air outlet at the top of the rear end of the main floating body. The damping plate is installed at the rear end of the main floating body. The damping plate includes an L-shaped fixed plate, a horizontal telescopic plate, a vertical telescopic plate and an inclined movable plate. The L-shaped fixed plate is fixedly connected to the main floating body. The horizontal telescopic plate is horizontally slidably connected to the horizontal side plate of the L-shaped fixed plate. The vertical telescopic plate is vertically slidably connected to the vertical side plate of the L-shaped fixed plate. The upper and lower ends of the inclined movable plate are respectively movably connected to the vertical telescopic plate and the horizontal telescopic plate. The L-shaped fixed plate is provided with a first telescopic driving mechanism for driving the horizontal telescopic plate to move back and forth and a second telescopic driving mechanism for driving the vertical telescopic plate to move up and down. The present invention can improve the wave energy conversion efficiency.

The invention relates to the technical field of neural engineering and brain-computer interfaces, in particular to a closed-loop multi-modal nerve stimulation system and method based on time interference, and the system comprises a multi-modal stimulation module which is used for integrating electrical stimulation, magnetic stimulation and optical genetic stimulation, and generating a time interference field domain; the neural state sensing module is used for collecting real-time electroencephalogram signals, blood oxygen concentration and neural metabolite level data; the neural control center is used for fusing neural state data and stimulation parameters, and dynamically adjusting time interference frequency and stimulation intensity through an adaptive algorithm; the time sequence cooperation engine predicts a neural response time phase based on a deep learning model, and optimizes a stimulation time sequence and a mode switching strategy; and the visual interaction platform is used for rendering the nerve activation thermodynamic diagram and the stimulation parameter adjustment curve in real time. Therefore, the problems of adjustment strategy solidification, low adjustment precision, insufficient energy conversion efficiency and the like in the prior art are solved.

The invention relates to an intelligent photovoltaic power generation control device which integrates a photovoltaic power generation panel, a series connection base, a supporting assembly, a water collection groove, a rainwater collection assembly, a cleaning assembly and a control assembly. A series base and a series interface are arranged below the photovoltaic panel, so that modular installation is facilitated; the supporting assembly comprises two supporting rods, the light following function is achieved, and the photovoltaic panel is automatically adjusted to face the sun. A water collecting groove above the photovoltaic panel and a rainwater collecting assembly at the bottom of the photovoltaic panel can collect and store rainwater; the cleaning assembly comprises a spraying unit and a cleaning brush and is used for automatically cleaning the surface of the photovoltaic panel; the control assembly monitors operation of the system and adjusts the posture of the photovoltaic panel and work of the cleaning assembly. Redundant electricity generated by the photovoltaic power generation panel in sunny days is stored for the system to use, and the light following function is not started in cloudy days, so that electric energy is saved; through the design, the efficiency and sustainability of photovoltaic power generation are improved; the energy conversion efficiency can be improved, the reliability and automation level of the system are enhanced, and the utilization and environmental friendliness of rainwater are improved.

The invention discloses an axial flux motor, an electric drive system and a vehicle. The axial magnetic flux motor adopts a single-stator and double-rotor structure in which a stator is arranged in the middle and rotors are arranged on two sides, and comprises a stator assembly, and a first rotor assembly and a second rotor assembly which are distributed on two sides of the stator assembly, and the first rotor assembly and the second rotor assembly are respectively connected with the stator assembly through a first rotor bearing and a second rotor bearing. The single-stator double-rotor axial flux motor only comprises one stator assembly, so that the energy loss is low, the heat productivity is low, the power density is higher, and the energy conversion efficiency is higher. One end of the rotor shaft is fixedly connected with the output part of the first rotor assembly, and the other end of the rotor shaft is in transmission connection with the output part of the second rotor assembly. The tolerance of the relative positions of the two rotor assemblies is smaller, the magnetic poles of the magnetic steel of the two rotor assemblies can be in one-to-one correspondence, and the difficulty of motor calibration after the motor assembly is assembled is reduced.

The present invention relates to a wave energy power generation buoy with a variable floating drum diameter and a control method thereof, belonging to the technical field of wave energy power generation buoys, and comprising an air turbine, a rigid floating drum, a flexible floating drum and a heaving plate. The rigid floating drum is a cylinder with a fixed annular cavity, an oscillating water column channel is arranged at the center of the rigid floating drum, a ventilation port communicated with the oscillating water column channel is arranged at the top center of the rigid floating drum, the air turbine is fixedly installed at the ventilation port, a plurality of uniformly distributed vertical rods are fixedly connected to the bottom of the rigid floating drum, and the lower ends of the vertical rods are fixedly connected to the heaving plate. The flexible floating drum is a cylinder with a radially variable annular cavity, the flexible floating drum is fixedly sleeved on the outer peripheral side of the rigid floating drum, and an air inflation and extraction device for inflating or extracting air from the flexible floating drum to change its radial dimension is fixedly installed in the fixed annular cavity. The present invention improves the wave energy conversion efficiency.

The invention relates to the technical field of all-vanadium redox flow batteries, in particular to a sulfonated polybenzimidazole proton exchange membrane as well as a preparation method and application thereof. The proton exchange membrane structurally comprises a polybenzimidazole polymer main chain and a sulfonic acid group, the free volume of the polybenzimidazole polymer is regulated and controlled by synthesizing raw materials with different structures, and the polybenzimidazole proton exchange membrane is obtained by sulfonating the polybenzimidazole polymer. Aiming at the problems of cross permeation of vanadium ion electrolyte of a positive electrode and a negative electrode of the all-vanadium redox flow battery, capacity attenuation of the all-vanadium redox flow battery and low energy conversion efficiency, the preparation method comprises the following steps: constructing a polybenzimidazole polymer main chain by selecting raw materials with high rigidity and high free volume; the mechanical property of the polybenzimidazole membrane is improved while a rapid ion channel is constructed in the polymer membrane, and water molecules can be contained to limit swelling of a membrane material.

The present invention relates to a heaving plate wave energy power generation buoy with a variable cross-sectional area of a water column and a method thereof, belonging to the technical field of wave energy power generation buoys. It includes a buoy body, an air turbine is installed in the air outlet hole at the top of the buoy body, a central pipe located directly below the air outlet hole is arranged at the center of the bottom of the buoy body, a water column cavity communicating with the air outlet hole is formed between the outer side wall of the central pipe and the inner side wall of the buoy body, a heaving plate is fixedly connected to the bottom end of the central pipe, a plurality of uniformly distributed horizontal guide rails are fixedly connected between the upper outer side wall of the central pipe and the middle inner side wall of the buoy body, a telescopic partition plate assembly that divides the water column cavity into an outer water column cavity and an inner water column cavity is slidably installed on the plurality of horizontal guide rails, and a synchronous telescopic driving mechanism for driving the telescopic partition plate assembly to move along the horizontal guide rails is fixed at one end of the horizontal guide rail. The present invention can change the cross-sectional area ratio of the outer water column cavity and the inner water column cavity according to sea conditions, and obtain the optimal wave energy conversion efficiency.

The invention relates to the technical field of solid-state battery energy conversion, and discloses a high-safety sodium-ion battery energy conversion method based on a solid-state electrolyte, which comprises the following steps: identifying an interface dynamic mismatch risk time period in a charging and discharging process, and applying micro-amplitude high-frequency acoustic vibration disturbance to a solid-state electrolyte and a sodium negative electrode interface in the time period, sodium ion microscopic distribution is regulated and controlled through the acoustic streaming effect, contact stress is dredged, dendritic crystal early nucleation is inhibited, dynamic reconstruction and optimization of the interface state are achieved, the solid-state sodium-electricity interface is converted into dynamic self-adaption from static mismatch, the ion transmission uniformity is actively maintained through the acoustic streaming effect, and dynamic reconstruction and optimization of the interface state are achieved. And meanwhile, real-time sensing of an interface state and dynamic adjustment of acoustic vibration parameters are realized in combination with an acoustic probing mechanism, so that the interface stability and dendritic crystal inhibition capability are effectively improved, and the energy conversion efficiency and the safety performance of the battery are remarkably enhanced.

In order to improve the energy conversion efficiency and the output performance, the piezoelectric synthesis jet device based on the combined cavity comprises a base body, a cavity, a nozzle and a piezoelectric vibrator, and a pump cavity is formed in a pump body; the piezoelectric vibrator is arranged in the pump cavity and divides the pump cavity into two cavities; a through hole is formed in the position, with the maximum amplitude, of the piezoelectric vibrator; the pump body is provided with a nozzle at the coaxial position of the through hole; the height, close to the nozzle, of the two cavities is larger than that of the other cavity; the hole diameter of the nozzle is larger than that of the through hole. The device has the characteristics and advantages of low power consumption, high energy density, high jet velocity of the nozzle, small size and easiness in integration.

The invention discloses a dimeric electron acceptor, which has one of the following structural formula: # imgabs0 #, in which R1 and R2 are respectively and independently selected from C1-C100 alkyl groups; x comprises H, F, Cl, I, NO2 or CN. According to the dimeric electron acceptor, a 3, 4-ethylenedioxythiophene or 3, 4-dimethoxythiophene unit serves as a connecting unit, an alkoxy side chain is connected to an outer side chain, the open-circuit voltage Voc of a solar cell device with the dimeric electron acceptor as an acceptor material can reach 1.02 V, the energy conversion efficiency PCE is 15.1%, and the dimeric electron acceptor is Vocgt reported at present; and the maximum value of PCE in a dimer acceptor system of 1V. The invention also provides a preparation method of the dimer electron acceptor and an organic photovoltaic device containing the dimer electron acceptor.

The invention provides a perovskite-crystalline silicon laminated cell, which comprises a heterogeneous crystalline silicon cell, a tunnel junction, a conductive layer, a first carrier transport layer, a perovskite light absorption layer, a second carrier transport layer and a transparent electrode layer which are sequentially laminated, wherein the first carrier transport layer comprises a dendritic structure facing and extending into the perovskite light absorption layer, and the length of the dendritic structure is smaller than the thickness of the perovskite light absorption layer. According to the perovskite-crystalline silicon laminated cell provided by the invention, through the arrangement of the dendritic structure with a relatively good capillary effect in the first carrier transport layer, a high-quality perovskite absorption layer can be formed, so that the energy conversion efficiency of the perovskite-crystalline silicon laminated solar cell is greatly improved.

The invention relates to the technical field of energy storage converter control, and discloses a dynamic voltage regulation and control method and system for an energy storage converter, and the system comprises a data collection module and an evaluation management module. According to the system, voltage change data and current change data are acquired through a data acquisition module and classified to form a data set, and an intelligent management module sets a monitoring period, analyzes the change trend of each phase voltage instantaneous value, generates a corresponding fluctuation data set, quickly locates a problem source, monitors the waveform of each phase voltage amplitude in real time, and generates corresponding monitoring data. The energy storage converter can adapt to power grid systems or energy storage devices of different scales, the intelligent management module analyzes deviation loss of electric energy in each conversion process and accurately evaluates the energy conversion efficiency of the energy storage converter in a rectification / inversion mode, the integration evaluation accuracy is high, the intelligent management module judges the power grid electric energy quality and harmonic distortion problems, and the energy conversion efficiency of the energy storage converter in a rectification / inversion mode is improved. And corresponding regulation and control suggestions are output, and the dynamic regulation and control response speed is high.

The invention relates to the field of manufacturing of sensitive elements and sensors in the electronic core industry, in particular to a piezoelectric MEMS acoustic device and a manufacturing method thereof. The device structurally comprises a substrate, an insulating layer, a silicon substrate, a multi-layer composite film structure and a protective layer from bottom to top in sequence, wherein the multi-layer composite film structure is formed by alternately growing electrode layers and piezoelectric layers, and the first layer and the last layer of the multi-layer composite film are the electrode layers; a bonding pad is arranged on the multi-layer composite film structure; the protective layer covers the upper surface of the device; a suspended back cavity structure is arranged between the substrate and the insulating layer; the silicon substrate, the multi-layer composite film structure and the protective layer are connected through an opening communicated with the back cavity; according to the device provided by the invention, the volume of the piezoelectric material is increased mainly by adding the piezoelectric layer, and the energy conversion efficiency of the structure is effectively improved, so that the sensitivity of the transducer is improved.

The invention relates to a semitransparent color-changeable solar cell and a preparation method thereof. The cell comprises the following modules which are stacked in sequence: a substrate; one or more photovoltaic modules, and one or more color changing modules. According to the technical scheme of the invention, the semitransparent solar cell can convert light energy into electric energy, and change of an absorption spectrum, namely photochromism, can be realized at the same time. In the embodiment of taking glass / ITO / PEDOT: PSS / PM6: Y6 / ZnO / BTE-CN / AgNWs: HPMC / ZnO as a device structure, 56.6% of average visible light transmittance can be maintained on the premise of realizing more than 5% of energy conversion efficiency, and the transmittance change exceeds 6% after complete color change. Meanwhile, compared with a standard device without a photochromic layer, the device with the structure can keep better anti-ultraviolet stability in the coloring-fading circulation process.

The invention provides a compound uniform-load and shunt load shedding type planetary gear gearbox with a face gear. The compound uniform-load and shunt load shedding type planetary gear gearbox comprises an input planet carrier integrated assembly, a first-stage compound uniform-load planet row, an inter-stage flexible connection structure, a second-stage planet row and a face gear steering output assembly. The input planet carrier integrated assembly is connected with the first-stage compound uniform-load planet row, the inter-stage flexible connection structure is arranged between the first-stage compound uniform-load planet row and the second-stage planet row, and a first-stage floating sun gear in the first-stage compound uniform-load planet row and the main shaft planet carrier structure are coaxially arranged. The first-stage floating sun gear is installed in a floatable mode through a first-stage sun gear supporting shaft, self-adjustment can be achieved in the radial direction and the axial direction, and the first-stage floating sun gear is meshed with the first planet gear and the second planet gear in a double-side mode. The energy conversion efficiency can be improved, uneven load distribution is improved, and the system integration degree is improved.

The invention relates to the technical field of power grid energy storage, in particular to a voltage fluctuation rapid suppression method based on a composite energy storage system, which realizes targeted response to voltage fluctuation of different frequencies by setting a dual-time scale power distribution strategy, improves the improvement efficiency of the energy storage system, and improves the suppression efficiency of the composite energy storage system. Through a composite control structure of an adaptive PI controller and a feedforward compensation link, the voltage control precision and the harmonic suppression rate are improved, and according to peak-valley electricity price characteristics and load fluctuation rules of different scenes, the power grid line voltage fluctuation type is monitored in real time, and a dynamic parameter library and an online identification algorithm are combined. The system can automatically adapt to factors such as hardware aging and environment change, a long-term control effect is maintained, and the charging and discharging frequency of the lithium iron battery is reduced by setting the high-frequency power buffer effect of the super capacitor, so that the cycle life of the lithium iron battery is prolonged; meanwhile, the overall energy conversion efficiency of the system is improved through cooperative control of the modular multilevel converter topology and the double energy storage elements.

The invention belongs to the technical field of aviation electric propulsion, and relates to a hydrogen fuel cell superconducting hybrid electric propulsion system based on hydrogen and helium heat exchange cooling, which is suitable for megawatt level branch aircrafts and comprises a liquid hydrogen storage tank, a hydrogen and helium heat exchanger, a hydrogen fuel cell, a lithium battery, an inverter, a superconducting motor, a propeller and other core components. The liquid hydrogen storage tank vaporizes liquid hydrogen through the micro-channel plate type hydrogen-helium heat exchanger and stably supplies the vaporized liquid hydrogen to the hydrogen fuel cell to generate electric energy; helium is used for a low-temperature cooling loop and cooling key assemblies such as a superconducting motor, a low-temperature inverter, a superconducting cable and a hydrogen fuel cell, and it is ensured that the key assemblies stably operate at the optimal working temperature. The hydrogen fuel cell and the lithium battery cooperatively provide electric energy for the superconducting electric propulsion system, the integrated energy management controller dynamically adjusts the output power of the fuel cell and the lithium battery by adopting a state machine strategy, and accurate monitoring and optimal distribution of working parameters of all components are achieved. The optimal heat balance and power output are ensured to be realized in different flight stages such as takeoff, cruise and landing; according to the hydrogen fuel cell hybrid electric propulsion system based on hydrogen and helium heat exchange cooling, the power generation efficiency and the operation stability of the hydrogen fuel cell are remarkably improved, the overall energy conversion efficiency is improved, and the high-power and high-efficiency power extraction requirements of megawatt aircrafts are fully met.

The invention discloses a giant magnetostrictive flextensional transducer energy conversion efficiency test system and method. The test system comprises a load part, a power supply part and a measuring and monitoring part. The load part comprises an oscillator module, an excitation module, a magnetic conduction module, an output module, a prestress loading module and a temperature control module; the power supply part comprises a programmable alternating current power supply and a matching box; the measuring and monitoring part comprises a power analyzer, a storage recorder, an oscilloscope, a laser displacement sensor, an acceleration sensor, a digital platform and the like. According to the method, the energy conversion efficiency of the giant magnetostrictive flextensional transducer under different working conditions can be simply, conveniently and effectively extracted, and theoretical support is provided for structural design and optimization of the giant magnetostrictive flextensional transducer.

The invention discloses an efficiency test system and test method for a photovoltaic grid-connected energy storage type inverter, and belongs to the technical field of inverters, the system comprises a photovoltaic grid-connected energy storage type inverter, a photovoltaic array simulator, a power grid simulator, a monitoring acquisition device and a monitoring upper computer; the monitoring acquisition equipment is used for acquiring a direct-current electric signal input by the photovoltaic grid-connected energy storage type inverter and an alternating-current electric signal output by the photovoltaic grid-connected energy storage type inverter, and sending the acquired data to the monitoring upper computer; the monitoring upper computer is used for controlling the photovoltaic power of different proportions input by the photovoltaic array simulator and the alternating current signal output by the power grid simulator, and according to weighting coefficients corresponding to the input photovoltaic power of different proportions, the received direct current signal input by the photovoltaic grid-connected energy storage type inverter and the received alternating current signal output by the photovoltaic grid-connected energy storage type inverter. And calculating the weighting efficiency of the photovoltaic grid-connected energy storage type inverter. The system provided by the invention can more accurately test the energy conversion efficiency of the photovoltaic grid-connected energy storage type inverter.

The invention relates to an axial modular combined magnetic flux switching type linear rotating motor, which comprises a rotor assembly and a stator assembly, the stator assembly comprises a plurality of groups of stator units arranged circumferentially, and each stator unit comprises a plurality of stator modules, tooth-shaped permanent magnets connected among the stator modules and armature windings wound on the stator modules. The rotor assembly comprises a plurality of rotor modules, a plurality of rows of rotor teeth are arranged on the outer circumference of each rotor module, and the rotor teeth in the adjacent rows are distributed in a staggered mode. According to the invention, the mechanical dynamic performance is optimized while the energy conversion efficiency is maintained, the innovative stator system adopts a distributed module architecture, the fault-tolerant capability of the system is effectively improved through redundancy design, the modular construction not only simplifies the production process, but also is more beneficial to large-scale manufacturing, the mover part adopts a full-magnetic-conductive material topology, and the energy conversion efficiency is improved. The mechanical strength is ensured, meanwhile, light weight of moving parts is achieved, and the stability requirement under the high-speed operation working condition is met.

The invention relates to the technical field of hybrid energy, and particularly provides a self-adaptive power distribution multi-source parallel mobile power supply system which comprises a multi-source input interface, a multi-channel input adjusting module, an energy storage module, an energy storage bidirectional adjusting module, a self-adaptive power distribution module and a power output interface. The method is characterized in that an MPPT algorithm is independently executed for each heterogeneous power supply through a multi-channel input adjusting module, and energy extraction is maximized; based on load detection and a multi-stage feedback mechanism, dynamic self-adaptive power distribution is realized; a multi-channel input end is adjusted into a unified standard bus voltage, and an output end dynamically adjusts the voltage according to a load, so that the energy conversion efficiency is improved while the use convenience is ensured; and the standard lithium battery units spliced without tools and the modular circuit design are adopted, so that the flexible combination and disassembly of the system are realized. According to the invention, the complexity of the hybrid energy system is greatly reduced, the system stability is improved, and efficient and lightweight hybrid energy mobile power supply is realized.

The utility model discloses an anti-hot-spot self-cleaning photovoltaic solar assembly, which belongs to the technical field of photovoltaic panels and comprises a support table, an inclined assembly, a photovoltaic panel and a cleaning assembly. The anti-hot-spot self-cleaning type photovoltaic solar assembly has the advantages of improving cleaning efficiency, reducing manpower consumption, prolonging the service life of the photovoltaic panel and facilitating angle adjustment, effectively reduces the influence of dust and dirt on the photovoltaic panel through the cleaning assembly, improves the absorption and conversion efficiency of the photovoltaic panel, and compared with manual cleaning, the anti-hot-spot self-cleaning type photovoltaic solar assembly has the advantages that the cleaning efficiency is improved, and the cleaning efficiency is improved. The device can reduce manpower consumption and improve the cleaning efficiency. And by arranging an inclined assembly, when the two supporting plates move, the mounting plate at one end is driven to change the angle, finally, the angle of the photovoltaic panel mounted on one side of the mounting plate is adjusted, the angle of the photovoltaic panel is adjusted according to the position of the sun, the photovoltaic panel can better absorb sunlight, and the energy conversion efficiency of the photovoltaic panel is improved.

The invention discloses a charge control method and a digital control system based on a dual-active bridge resonant converter, and belongs to the technical field of dual-active bridge resonant converter control. According to the method, a resettable integrating circuit is used for sampling resonance current and converting the resonance current into integrating voltage which is in a linear relation with charge injection quantity, and an integrating capacitor is discharged and reset before each time of injection; superposing the integral voltage and the ramp voltage; comparing the superposed signal with a threshold voltage output by a current loop through a comparator, and when the superposed signal reaches a threshold value, triggering to generate a PWM signal and switching the working mode of the converter; a switching tube is controlled to act according to a PWM signal, a switching time sequence is dynamically adjusted, effective control over transmission power is achieved, and a digital control system for achieving the method is established. According to the method, rapid dynamic response, efficient power transmission and stable operation of the dual-active bridge resonant converter are realized by controlling resonance current integration and a switching time sequence, and the energy conversion efficiency and the system reliability are effectively improved.