25 results about "Power system design" patented technology

The invention discloses a hydrogen-lithium dual-power system structure optimization design and integrated control method applied to an unmanned aerial vehicle. The method comprises the following steps: constructing a hydrogen-lithium dual-power system of the unmanned aerial vehicle; setting an integrated control strategy according to the hydrogen-lithium dual-power system; the integrated control strategy comprises an energy management strategy and a life and safety management strategy; the energy management strategy comprises a rule-based strategy, a power following strategy and a self-adaptive optimization strategy; the service life and safety management strategy comprises a hydrogen fuel cell protection strategy, a lithium battery health management strategy, a thermal management strategy, a dual-power coupling safety management strategy and a redundancy and fault processing strategy. By optimizing the power system design and the energy management strategy, the mass of the unmanned aerial vehicle device is reduced, the cruising ability, the load capacity and the environmental adaptability of the unmanned aerial vehicle are improved, and optimization processing of the control strategy is achieved.

The application relates to a power system for an explosion-proof carrier, and belongs to the field of power system design. The system comprises a central control explosion-proof box, a battery heating module, a DC 220V direct current power supply, an explosion-proof battery pack, an explosion-proof motor driver, an explosion-proof display and a charger. The application effectively solves the problems of low-temperature charging difficulty, short endurance time, poor battery pack data acquisition and equalization management effect and improper control strategy of the existing carrier, and realizes advanced reliability, controllable risk and long service life.

The invention relates to the technical field of new energy automobile power system design and optimization, and discloses an intelligent optimization method for the transmission speed ratio of an electric truck, which comprises the following steps of: 1.1, performing matching and parameter configuration on the power, the torque and the rotating speed of a driving motor according to the whole vehicle parameter, the performance index and the working condition load characteristic of the electric truck; 1.2, performing optimization configuration on energy, capacity and voltage parameters of a power battery based on the energy consumption characteristic of the whole vehicle and the endurance mileage requirement; 1.3, analyzing constraint conditions which need to be met by the transmission speed ratio, wherein the constraint conditions comprise the maximum vehicle speed, the gradeability and the acceleration performance. The transmission speed ratio of the electric truck is optimized through the deep Q network improved multi-objective evolutionary algorithm, dynamic property and economic indexes can be comprehensively considered, and multi-objective optimization of transmission speed ratio parameters is achieved. Compared with a traditional optimization method, the power performance indexes such as acceleration time and gradeability can be effectively balanced, energy consumption per hundred kilometers can be remarkably reduced, and the economical efficiency of the whole vehicle is improved.

The application belongs to the technical field of high Mach number aircraft power system design, and particularly relates to a high Mach number aircraft power system, on the basis of a Mach number two aircraft power system, an APU+EPU scheme is adopted for the auxiliary power system, and a ram turbine is additionally arranged, the auxiliary power system can be used as an emergency energy source when the flight speed exceeds 2 Mach, main engine in-flight accidental shutdown and other abnormal conditions occur, so as to ensure the flight safety of the aircraft, in addition, the auxiliary power system can provide reliable auxiliary energy for the aircraft during aircraft mode conversion and in-flight unpowered taxiing, so as to keep the energy supply stable and ensure the continuous and reliable operation of the aircraft.

The application relates to the technical field of new energy automobile power system design and optimization, and discloses an intelligent optimization method for transmission speed ratio of an electric truck, which comprises the following steps: 1.1. According to the whole vehicle parameters, performance indexes and working condition load characteristics of the electric truck, the power, torque and rotating speed of the driving motor are matched and parameter configured; 1.2. Based on the whole vehicle energy consumption characteristics and the endurance mileage demand, the energy, capacity and voltage parameters of the power battery are optimized and configured; 1.3. The constraint conditions that the transmission speed ratio needs to meet are analyzed, including the maximum vehicle speed, climbing ability and acceleration performance. The transmission speed ratio of the electric truck is optimized through a multi-objective evolutionary algorithm improved by a deep Q network, the power performance and economic performance indexes can be comprehensively considered, and multi-objective optimization of the transmission speed ratio parameters is realized. Compared with the traditional optimization method, the application can not only effectively balance the power performance indexes such as the acceleration time and the climbing ability, but also significantly reduce the energy consumption per 100 kilometers, and improve the economy of the whole vehicle.

The invention discloses a self-powered kitchen safety monitoring system, and relates to the field of indoor self-powered system design. The system comprises a voltage monitoring module used for sending an output voltage value, monitored in real time, of a photovoltaic module to a safety monitoring unit; the safety monitoring unit is used for performing kitchen safety judgment, sending a stop instruction to the step-down conversion module when the output voltage value is smaller than or equal to a voltage threshold value, and sending a start instruction to the step-down conversion module when the output voltage value is larger than the voltage threshold value; the voltage reduction conversion module is used for reducing the voltage output by the photovoltaic module and then supplying power to the safety monitoring unit through the automatic switching circuit when the starting instruction is received; and the automatic switching circuit is used for switching the input source to the energy storage module when detecting that the step-down conversion module stops working. According to the kitchen safety monitoring system, uninterrupted kitchen safety monitoring is realized through the energy acquisition unit, the energy management unit and the safety monitoring unit, so that the problem of safety monitoring blind areas of an existing kitchen safety monitoring system is solved.

The invention discloses a galvanic corrosion risk assessment method and device for a dissimilar metal lap joint structure, and relates to the technical field of corrosion protection, and the method comprises the steps: obtaining standard polarization curves of a plurality of metal materials for the power system design of aviation equipment, so as to form a polarization curve library; determining a first metal material and a second metal material which form the to-be-evaluated dissimilar metal lap joint structure; acquiring a first standard polarization curve of the first metal material and a second standard polarization curve of the second metal material from a polarization curve library to determine the standard galvanic corrosion current density of the lap joint structure of the galvanic anode metal material and the dissimilar metal to be evaluated; determining a target corrosion rate of the galvanic couple anode metal material; and based on the target corrosion rate, determining a galvanic corrosion risk assessment result of the to-be-assessed dissimilar metal lap joint structure. The technical problem of low efficiency of a galvanic corrosion risk assessment mode in related technologies is solved, and the technical effect of improving the efficiency of galvanic corrosion risk assessment is achieved.

The invention relates to the technical field of power system design, in particular to a three-dimensional GIS (geographic information system)-based power transmission line tension pay-off analogue simulation system, which comprises a three-dimensional terrain acquisition result set generated by acquiring lead, terrain and construction information and merging matched data, and a slope direction energy response data set generated by reconstructing terrain based on elevation and gradient. Connecting the control points according to a potential energy distribution sequence to form a continuous line track, analyzing stress and redistributing tensile force, generating a line tension distribution data set, loading tension data to simulate a pay-off process, and outputting a power transmission line tension pay-off analogue simulation result. According to the method, terrain potential energy, slope direction and tension are fused in a space coordinate system, terrain and line stress are coordinated, a path extends along a potential energy gradient, node tension is balanced after reconstruction and time sequence correction, mapping of potential energy response, slope direction extension and tension transmission is formed, pay-off mechanics is mapped into a stable path in real time, it is guaranteed that the line is consistent with the terrain, and the method has the advantages of being simple in structure and convenient to operate. And the coordination, the precision and the reliability are improved.

The invention belongs to the field of integrated circuits, and particularly relates to a PWM (Pulse Width Modulation) control chip of an integrated two-way error amplifier, which comprises a voltage reference source for generating a reference voltage VREF; the current sampling amplifier is used for sampling the output current flowing through the resistor RS and performing signal amplification; the oscillator is used for generating an oscillation clock signal; the mode selection circuit is used for deciding to start the error amplifier 1 or the error amplifier 2 according to the magnitude of the received feedback voltage VFB; the PWM comparator is used for comparing the magnitude of the error amplification voltage VC and the magnitude of the current sampling amplification voltage and outputting a pulse width modulation signal; the logic control module is used for processing the pulse width modulation signal, the oscillation clock signal and an output signal of the protection circuit and outputting a logic control signal; the driving output circuit is used for logic control signal driving capability amplification and outputting voltage VDRI to control on or off of a power switch tube Q0; according to the invention, the design flexibility and configurability of the power supply system can be improved.

The invention discloses a synchronous rectification leading edge blanking self-adaptive adjustment method adaptive to double-transistor flyback. The method comprises the following steps: detecting the turn-on time of a driving signal of a synchronous rectification controller and the high level time of a high-voltage detection signal; calculating a first duty ratio and a second duty ratio; judging whether a leading edge blanking time self-adaptive adjustment closed-loop condition is met or not; when the turn-on time of the driving signal is increased and is close to the high level time of the high-voltage detection signal, adjusting is stopped, and the current leading edge blanking time is maintained; and if the turn-on time of the driving signal is not increased to be greater than the leading-edge blanking time after the leading-edge blanking time is adjusted by the synchronous rectifier within the preset time range, the leading-edge blanking time is traced back to a default value. According to the method, the leading edge blanking algorithm is optimized in the synchronous rectification controller, so that the change of system power parameters is avoided to the greatest extent, the design complexity of a power supply system is reduced, and the risks of efficiency reduction and temperature rise and heating caused by repeated design and mistaken starting of the system are avoided.

This invention belongs to the field of power system design technology, specifically providing a circuit, power system, and server for reducing inrush current during circuit card insertion and removal. The circuit includes an input power supply, a stepped circuit module, and a surge handling circuit module. The input power supply is connected to the surge handling circuit module via the stepped circuit module. The surge handling circuit module is used to connect to the circuit card. The input power supply outputs high and low levels to the stepped circuit module at set time intervals. The stepped circuit module outputs stepped voltages to the surge handling circuit module based on the received high and low levels. The surge handling module operates in the ohmic region based on the voltage output by the stepped circuit module to reduce the inrush current of the circuit card. By operating the MOSFET in the ohmic region, when the hot-insertion circuit is activated, the MOSFET can be temporarily controlled to operate in the ohmic region to reduce the inrush current.

The invention belongs to the field of airborne power system design, and particularly relates to a stability constraint method for an MEA variable-frequency alternating-current power system. The method comprises the following steps: firstly, establishing a port impedance / admittance model of each device in a system; secondly, analyzing the stability of each subsystem, and redesigning if the stability margin does not meet the requirement; then, on the premise that all subsystems are stable, the overall stability of the system is analyzed according to a generalized Nyquist stability criterion; if the whole system is unstable or underdamped, quantitatively identifying a high-influence negative subsystem with the maximum stability deterioration degree in a mode of setting admittance of a load-side subsystem to be zero; and finally, the stability margin of the high-influence negative subsystem is improved by redesigning the high-influence negative subsystem. The MEA variable-frequency alternating-current power system is ensured to have enough stability margin in the design stage, so that the stability problem is avoided.

The invention discloses a visual graph making method and device, electronic equipment and a storage medium, and relates to the technical field of visualization. According to the application, system process demonstration can be constructed frame by frame to form a visual graph so as to dynamically display a system operation state, and key equipment is explained in combination with a power system design specification and a physical principle; visual dynamic display and professional principle description are combined, so that the technical problems that new employees are difficult to understand the overall logic of the system due to an existing training mode, misoperation occurs due to lack of visual cognition in actual operation, and the operation safety and economical efficiency of a power plant are further influenced can be solved; the technical effects of helping employees to deeply understand the system flow and the equipment principle, reducing misoperation and guaranteeing the operation safety and economical efficiency of the thermal power plant are achieved.

The invention discloses polishing equipment and a polishing process for deep hole machining, and relates to the technical field of deep hole machining, the polishing equipment comprises a supporting ring, and a lifting mechanism for lifting is arranged on the upper surface of the supporting ring. And by arranging the supporting ring, a stable and reliable mounting reference and a bearing platform are provided for the whole polishing equipment, and it is ensured that the equipment keeps accurate positioning and stable supporting in the deep hole machining process. According to the deep hole polishing device, the lifting mechanism is arranged, the effect that a polishing part is accurately and vertically positioned and vertically moved in a deep hole is achieved, the double-power system design is adopted, lifting stability is guaranteed, accurate rotating motion is provided, and the deep hole polishing device can adapt to deep hole polishing operation with different depth and precision requirements; and the connecting cylinder is fixedly arranged at the bottom end of the lifting mechanism, the bottom end of the connecting cylinder is rotationally connected with a rotating cylinder, and the effect of grinding and polishing holes with unsmooth interiors is achieved.

The application discloses a kind of overall design methods of distributed modular hybrid system, it is related to power system design field.The method determines the number of multiple energy conversion units and the number of energy storage units corresponding to each ratio scheme according to the number of power unit and different ratio scheme;Simulation model of each design scheme is constructed, and demand power is distributed by power distribution algorithm, and each simulation model is simulated under preset environmental conditions, wherein the power distribution algorithm is assisted by energy storage unit, and high and low frequency demand power is flexibly distributed;Based on the simulation results, the best design scheme with the highest average efficiency is determined.The application is designed according to different ratio scheme, analyzes the global result of different combination scheme, obtains the best design scheme, improves the overall average efficiency of power system.In addition, the power distribution algorithm intelligently adjusts according to energy demand and flexible combination, improves the space utilization and the availability of power system.

Electronic devices according to embodiments of the present technology may include a battery. The devices may include a nanocrystalline foil. The devices may include a wireless charging coil seated on the nanocrystalline foil. The devices may also include an integrated circuit configured to operate the wireless charging coil in a wireless charging transmission mode.

The invention provides an electric power automatic mapping method and system based on topology identification, and relates to the technical field of electric power monitoring, and the method comprises the steps: determining the wiring modes and independent intervals of different voltage levels through the analysis of a power grid topology structure; performing layout on the primary equipment by adopting an automatic layout algorithm according to the wiring mode and the independent interval, and generating an equipment coordinate position; automatically generating a main wiring diagram based on the coordinate position of the equipment, and completing data association between the primary equipment and a database; based on the independent intervals in the main wiring diagram, the interval types are automatically recognized, interval diagrams are generated in batches through a dynamic template, and the dynamic template replaces wildcard characters with actual interval names and device names to complete data association between devices in the interval diagrams and a database. According to the automatic mapping method, the topology of the power system can be intelligently analyzed, graph layout can be automatically completed, data seamless association can be realized, and the efficiency and quality of power system design work can be improved.

The application provides a joint optimization design method for a profile-operation-power system of an electric vertical take-off and landing aircraft, which defines power system design variables, profile design variables and operation optimization variables of the electric vertical take-off and landing aircraft; establishes a power system mass model, an aircraft profile demand analysis model, a variable-pitch propeller operation performance model and a motor operation performance model; combines power system design and operation control planning of the electric vertical take-off and landing aircraft, realizes joint optimization design of the profile-operation-power system of the electric vertical take-off and landing aircraft, and maximally considers the wide-speed domain operation characteristics of the variable-pitch propeller and the characteristics of huge differences between the hovering and cruising flight stages of the vertical take-off aircraft. Compared with the prior physical system design and the subsequent operation control design, the overall performance of the aircraft is optimized.

The application discloses a kind of knowledge graph construction methods and devices for ship power system design task.The method includes the following steps: mode layer design is carried out, and the concept of ship power system and the relationship between concepts are defined;Unstructured data is preprocessed;The entity and the relationship between entities are marked;The entity data set and the entity relationship data set marked are trained to obtain the corresponding model;Triplet extraction is carried out based on the obtained model, imported into the graph database, and the concept knowledge graph of ship power system is formed;Modeling is carried out, and the knowledge graph of ship power system design task is formed;Atlas fusion is carried out, and the final knowledge graph is formed.The application can realize the construction of the knowledge graph of ship power system design task, make the knowledge graph construction in the field more convenient, efficient and accurate, provide knowledge base for subsequent use of atlas to build query platform, and improve the retrieval efficiency of ship designers.

The invention discloses an electromagnetic friction combined type self-powered system for shafting monitoring equipment, which belongs to the technical field of power generation and comprises an electromagnetic power generation unit and two groups of friction nanometer power generation units, and the two groups of friction nanometer power generation units are symmetrically arranged on the left side and the right side of the electromagnetic power generation unit and are connected with the electromagnetic power generation unit. Compared with other composite power generation devices, the self-powered system designed by the invention adopts an integrated rotor design, two friction nanometer power generation units and one axial magnetic flux electromagnetic power generation unit are deeply fused, mechanical energy synchronous capture is realized by sharing a rotating part, the space limitation of the composite power generation device is broken through, and the power generation efficiency is improved. The system compactness is obviously optimized, and a structural scheme is provided for multi-source energy collaborative collection.

This application provides a generator output impedance measurement circuit, relating to the field of power system design technology, for improving the measurement accuracy of generator output impedance. The circuit includes a host computer, a main circuit, and a measurement circuit. The main circuit includes a generator equivalent circuit and a circuit load equivalent circuit. The measurement circuit includes a harmonic injection circuit and a sampling circuit. The harmonic injection circuit is connected to both the generator equivalent circuit and the circuit load equivalent circuit. The impedance of the generator equivalent circuit is lower than that of the circuit load equivalent circuit. The host computer is connected to the harmonic injection circuit and the sampling circuit. The host computer is used to set harmonic injection parameters and, according to these parameters, inject voltage disturbance signals of different frequencies into the main circuit through the harmonic injection circuit. The sampling circuit is used to collect the voltage and current between the generator equivalent circuit and the harmonic injection circuit within a predetermined time period of the injected voltage disturbance signal, and transmit the collected voltage and current to the host computer.

According to the MBSE-based unmanned aircraft energy power system design method and system provided by the invention, a unified logically coherent system model is used as a unique credible source in the whole design process, and the method and the system run through all design stages such as demand analysis, overall design and verification of an energy power system; the problem of information consistency of design requirement transmission, overall performance decomposition, system composition determination, internal interface design, reliability element attributes, cost element attributes and the like between subsystems and equipment is solved, scattered documents are replaced to become an information interaction center, and the function of designing an energy power system based on a model is achieved. In the initial stage of design, the design scheme can be adjusted through the reliability and cost parameters of the model calculation system, and the design iteration efficiency is improved. According to the method, the consistency of technical requirements, functional activities and architectures in design is ensured, the reliability and cost of a design scheme are verified, and a full-chain forward design path is opened up.

This application discloses a preventive reserve dispatch configuration method and system based on responsibility weights, relating to the field of power system dispatch and operation. The method includes: acquiring the operating status data and power forecast data of the power system to be configured; solving for the marginal impact coefficient of each dispatch node based on a preset nonlinear AC power flow model and the operating status data; constructing a dynamic safety responsibility matrix based on the marginal impact coefficient of each dispatch node and the power forecast data; constructing and solving a preventive reserve optimization decision model based on the dynamic safety responsibility matrix and the power system design, with the objectives of minimizing the total system regulation cost and optimizing the reserve space distribution, to obtain a dispatch configuration scheme; and performing dispatch configuration on the power system according to the dispatch configuration scheme to complete the preventive reserve dispatch configuration of the power system. Implementing this application can improve the accuracy of preventive reserve dispatch configuration.

This invention discloses a testing system and method for the power system of flapping-wing aircraft, belonging to the field of flapping-wing aircraft testing. In this system, a wind tunnel experimental platform is used to install the power system under test and provide test conditions; a signal measurement module is used to synchronously acquire electrical power, motor current and voltage, motor speed, rocker arm angle, rocker arm torque, lift, and net thrust; a motor characteristic testing platform is independently set up to establish the correspondence between motor output torque and line current and line voltage offline; a data acquisition and analysis module receives the above signals and correspondences, calculates the actual output torque of the motor, and thus obtains the efficiency of the electronic speed controller, motor, flapping-wing mechanism, as well as the overall efficiency and force efficiency of the power system. This invention can comprehensively reveal the energy flow and loss of each component within the power system of a flapping-wing aircraft, providing a quantitative basis for power system design verification and optimization, and is applicable to various types of motor-driven pure flapping-wing mechanisms.

The invention belongs to the field of aircrafts, relates to an aircraft power system design technology, and provides a retractable fan configuration aero-engine and a control method, and the engine comprises a gas turbine engine, a propulsion fan, a connecting assembly, a fan cabin door and a retractable mechanism. The gas turbine engine is located in the external pressure type air inlet channel, and the propulsion fan is arranged in a storage cabin outside the external pressure type air inlet channel. One end of the connecting assembly is connected with the gas turbine engine, and the other end is connected with the propulsion fan; the fan cabin door is arranged on the outer contour of the folding and unfolding device. The retracting and releasing mechanism is arranged on the connecting assembly and used for retracting the propelling fan into the storage cabin or releasing the propelling fan from the storage cabin when the fan cabin door is opened. The independent and controllable propulsion duct system is constructed, the structural layout of an engine can be simplified, the weight is reduced, the maintenance cost is reduced, meanwhile, the pneumatic adaptability under the multi-working-condition flight condition is guaranteed, and the voyage capacity and the pneumatic efficiency of the aircraft are comprehensively enhanced.