151 results about "Power extraction" patented technology

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 power supply intelligent management control system, and relates to the technical field of power supply management, and the system comprises a power supply processing module which is used for accessing and transmitting AC electric energy and carrying out voltage reduction, rectification filtering, inversion and transformation processing; the current sampling module is used for current sampling control, signal conversion and amplification filtering; the voltage comparison module is used for setting an overvoltage threshold value, comparing the overvoltage threshold value with the voltage and detecting the shunting degree; the power taking processing module is used for converting, amplifying and filtering the shunted sampling signals, and rectifying and storing the shunted sampling signals; the intelligent control module is used for signal receiving and module control; the electric energy adjusting module is used for adjusting voltage; and the output processing module is used for outputting filtering and electric energy superposition processing and supplying power to the output module. The intelligent management control system for the power supply can provide voltage stabilization and perform shunt power taking work and electric energy processing when a sampled signal is greater than a set threshold value, so that the safety of the system can be improved, and energy-saving power supply control can also be performed.

A system of a hybrid aircraft includes a first gas turbine engine, a second gas turbine engine, and a controller. The first gas turbine engine includes a first low spool electric machine and a first high spool electric machine. The second gas turbine engine includes a second low spool electric machine and a second high spool electric machine. The controller is operable to determine an operating mode of the hybrid aircraft and control power extraction from either or both of the first low spool electric machine and the first high spool electric machine while a single engine descent mode is active. Electric power is provided to either or both of the second low spool electric machine and the second high spool electric machine while the single engine descent mode is active to balance thrust between the first gas turbine engine and the second gas turbine engine.

A hybrid electric gas turbine engine two speed transmission for a low spool drive including an accessory gearbox in operative communication with a low speed spool motor-generator; a transmission in operative communication with the accessory gearbox and the low speed spool motor-generator; a low speed spool angled gearbox in operative communication with the transmission; and a low speed spool in operative communication with the low speed spool angled gearbox.

A power extraction system for a gas turbine engine can include a low spool transmission, a high spool transmission, a low spool motor-generator mechanically connected to the low spool transmission, a high spool motor-generator mechanically connected to the high spool transmission and electrically connected to the low spool motor-generator, and a controller in operable communication with the low spool motor-generator and the high spool motor-generator. The controller can be configured to command the high spool motor-generator to push power to the low spool motor-generator in response to a ratio of the fan inlet temperature to a combustor outlet temperature being less than a threshold fan-inlet-temperature-to-combustor-outlet-temperature ratio.

The invention relates to the technical field of agricultural machinery load control, in particular to a corn harvester operation load control system and method, and the system comprises a power extraction module, a speed regulation and control module, a trend analysis module, a parameter optimization module and a load closed-loop module. According to the method, frequency characteristics are extracted in a periodic and segmented mode through header power signals, load dynamic sensing is carried out, advancing speed adjustment is more real-time and prospective, response sensitivity and stability are improved in combination with PID control, equipment stably operates at multiple crop densities and plots, the torque increment of a main shaft is monitored in real time, and wavelet transformation multi-scale analysis is carried out; load fluctuation fine-grained identification is carried out, a roller gap and power output are dynamically adjusted to optimize parameters with a minimum mean square error, frequency and torque characteristic closed-loop comparison is constructed, control self-matching and continuous self-adjustment are carried out, error minimization and trend tracking feedback are fused, the intelligence of the harvester is enhanced, and load sudden change performance fluctuation and energy consumption loss are reduced.

The invention relates to the technical field of wave power generation, and discloses a maximum power extraction control method for a built-in direct-drive type wave power generation device, which is applied to the built-in direct-drive type wave power generation device. The method comprises the following steps: acquiring a motion position signal of a core power generation unit, a capacitor voltage signal of a generator rectification output end and an inductive current signal of a boost conversion circuit; determining a position error signal between the motion reference position of the core power generation unit and the detected real-time position, and adjusting to obtain a position reference voltage; capacitance voltage and inductance current of the rectification output end of the generator are collected in real time, optimal reference voltage is determined, and MPPT reference voltage is obtained through adjustment; determining the sum value between the position reference voltage and the MPPT reference voltage, and setting the sum value as the final capacitance reference voltage of the output end of the generator; and calculating a duty ratio D by using a PI controller, and generating a PWM signal to realize tracking control of the maximum power. The energy conversion efficiency of the built-in direct-drive type wave power generation device is improved.

A free-space power receiver includes layouts of photovoltaic cells selected to optimize power extraction even when a power beam moves or changes profile on the receiver. The receiver may also include a circuit board, which may include suitable wiring for connecting the photovoltaic cells to one another and to a load for extraction of power. The receiver may include capacitors wired in parallel with the photovoltaic cells.

The invention discloses an aviation double-shaft engine power extraction method based on double-winding generators, and relates to the field of aviation power generation, and the method comprises the steps: firstly, calculating the output reference power of control side windings of two double-winding generators according to the power requirements of various electrical loads based on the characteristics of the double-winding generators; and compensating a voltage loop of each double-winding generator by combining the droop characteristic of the generator so as to achieve the purpose of controlling the output power of the generator, transmitting the output power step by step through the voltage loop and the current loop, and finally outputting the output power to the high-voltage-shaft and low-voltage-shaft double-winding generators through SVPWM (Space Vector Pulse Width Modulation) modulation. Therefore, the power extraction of high and low pressure shafts of the aviation double-shaft engine is proportionally distributed. According to the method, the influence of power extraction on the stability margin and efficiency of the engine can be reduced while output of various electric energy is guaranteed, and power transmission and distribution are achieved through the high-voltage direct-current buses connected in parallel on the winding side of the generator control winding.

The embodiment of the invention discloses a primary and secondary fusion pole-mounted switch self-adaptive energy supply system and method, and relates to the technical field of intelligent power distribution network equipment. The system comprises a capacitor electricity taking module located on the primary side of the primary and secondary fusion pole-mounted switch, and a super capacitor, a power management module, a storage battery, an energy management control unit and a DC-DC circuit which are located on the secondary side of the primary and secondary fusion pole-mounted switch. Dynamic coordination of two energy storage elements, namely a super capacitor and a storage battery, in a steady-state low-power-consumption monitoring and transient-state high-power driving scene is realized, energy distribution optimization, closed-loop charging guarantee and abnormal fault-tolerant design are combined, and the problems of high steady-state power consumption and insufficient transient-state driving capability existing in a traditional primary and secondary fusion pole-mounted switch power supply scheme are solved.

The invention discloses a high-voltage capacitance electricity taking device, and relates to the field of electric energy storage, the high-voltage capacitance electricity taking device comprises an electricity taking device shell, an electromagnetic unit and a flowing part, an insulating sleeve is arranged on the electricity taking device shell, a capacitance voltage divider is arranged in the insulating sleeve, a spiral cavity is formed in the electricity taking device shell, and a power source is arranged in the spiral cavity. A first flowing opening and a second flowing opening are formed in the inner side wall of the electricity taking device shell, and the spiral cavity communicates with the electricity taking device shell through the first flowing opening and the second flowing opening. When a high-voltage power transmission circuit is switched on and the environment temperature and humidity are relatively high, the flowing part works to enable the locally overheated insulating oil of the electromagnetic unit to circularly flow, and the wind wheel on the connecting shaft rotates to form airflow to perform air-cooling heat dissipation on the expanded heat dissipation fins, so that the insulating oil entering the heat dissipation fins is cooled, and the heat dissipation efficiency is improved. The temperature of the insulating oil is further reduced, and the situation that the insulating oil is decomposed to generate a large amount of gas to damage the shell of the power taking device under the action of long-time high temperature and high electric field intensity is avoided.

The application relates to the technical field of wave power generation, and discloses a maximum power extraction control method of an embedded direct-drive wave power generation device, which is applied to the embedded direct-drive wave power generation device and comprises the following steps: acquiring a motion position signal of a core power generation unit, a capacitor voltage signal of a generator rectifier output end and an inductance current signal of a boost conversion circuit; determining a position error signal between a motion reference position of the core power generation unit and a detected real-time position, and adjusting to obtain a position reference voltage; collecting the capacitor voltage and the inductance current of the generator rectifier output end in real time, determining an optimal reference voltage, and adjusting to obtain an MPPT reference voltage; determining a sum value between the position reference voltage and the MPPT reference voltage, and setting the sum value as a final capacitor reference voltage of a generator output end; and calculating a duty cycle D by using a PI controller, and generating a PWM signal to realize tracking control of the maximum power. The application improves the energy conversion efficiency of the embedded direct-drive wave power generation device.

This utility model discloses a circuit breaker, belonging to the field of low-voltage electrical technology. The circuit breaker includes a contact structure and a leakage current test circuit. The contact structure includes a first moving contact and a conductive rod electrically connected to the first moving contact. The leakage current test circuit includes a test resistor and a spring contact. The test resistor has a first lead, and the first lead and the end of the conductive rod facing the spring contact are both abutted against and electrically connected to the first surface of the spring contact. The circuit breaker provided by this utility model adopts a lap-connection power extraction method to electrically connect the test resistor and the first moving contact, so as to realize the leakage current test circuit extracting power from the first end of the test resistor, effectively reducing the use of wires, that is, reducing the number of wire connection points and soldering points, reducing the risk of short circuit and leakage current test circuit failure, facilitating assembly, and effectively reducing manufacturing costs.

To provide a work vehicle with a simplified structure for power transmission to a hydraulic pump. [Solution] The work vehicle 10 comprises a body 11 having a power source, a hydraulic pump 16, and a gear case 83. The hydraulic pump 16 is driven by the power of the power source and discharges hydraulic fluid. The gear case 83 houses a power extraction mechanism that transmits the power of the power source to the hydraulic pump 16. The hydraulic pump 16 has a first pump 81 and a second pump 82 which are arranged on both sides of the gear case 83 so as to sandwich the gear case 83.

The invention discloses an aero-engine and a power extraction and distribution method thereof, which include a first-level control and a second-level control. The second-level control plans a power extraction and distribution strategy according to flight conditions, power, thrust instructions and electrical load instructions. When the engine is in a steady state, the impact on the engine caused by a sudden change in high-power electrical load and electric energy feedback is balanced. When the engine is operating at the boundary of a flight envelope or in a transition state, the operability of the engine is improved. The output of the second-level control is used as an input instruction of the first-level control to complete closed-loop control of a first generator, a second generator and an energy storage device. The application reduces the impact on the engine dynamics caused by a sudden change in high-power electrical load or the generation of feedback electric energy, and improves the operability of a multi-rotor engine at the boundary of the flight envelope and in a transition state.

The present invention belongs to the field of aerospace electric propulsion technology and is a hybrid energy refrigeration integration solution based on a superconducting generator applicable to high-power aerospace distributed electric propulsion. It includes an aeroengine, a superconducting generator, a liquid hydrogen storage tank, a hydrogen fuel cell, a storage battery, an electric motor, a fan, and control units for each component. The liquid hydrogen storage tank provides liquid hydrogen for cooling the superconducting generator component. After vaporization, the obtained hydrogen gas supplies anode fuel to the hydrogen fuel cell to generate electric energy, realizing the on-board cooling of the superconducting generator and the reuse of hydrogen energy. The superconducting generator, hydrogen fuel cell, and storage battery generate electricity to supply the distributed electric motor. The hybrid power system controller reasonably allocates, schedules, and optimizes the parameters of each component through a rule-based power tracking control energy management strategy. This hybrid energy refrigeration integration solution based on a superconducting generator can effectively reduce fuel consumption, increase the system power density, and improve energy utilization efficiency, and can meet the high-power and high-efficiency power extraction requirements of high-power aerospace distributed electric propulsion.

This invention relates to a transformer core discharge detection device, comprising a base; a clamping assembly mounted on the base for detachably clamping and fixing the part to be detected to the transformer core; a power extraction component disposed on the clamping assembly for extracting an electrical signal from the part to be detected; a first discharge electrode electrically connected to the power extraction component; a second discharge electrode disposed opposite to the first discharge electrode, forming a detection gap between them; a recording medium disposed between the first and second discharge electrodes to leave a trace when an abnormal discharge occurs; a discharge detection unit electrically connected to the second discharge electrode to detect abnormal discharge and output a trigger signal; a conveying mechanism driving the recording medium to move; the conveying mechanism electrically connected to the discharge detection unit, responding to the trigger signal and driving the recording medium forward a predetermined distance. This invention has a simple structure, is easy to install, and can intuitively record abnormal discharge events.

The factory automation equipment (10) according to the present disclosure comprises a housing electrically connected to a frame ground (102), a signal circuit provided inside the housing and having a signal ground (202), a power extraction unit (11) electrically connected to the frame ground (102) and the signal ground (202) to extract power from common mode noise generated between the frame ground (102) and the signal ground (202), and an output unit (12) that outputs information relating to the power extracted from the power extraction unit (11) for display. (Representative diagram) Figure 1

To provide a track board that allows for a wide range of movement of the moving parts around a stationary toy vehicle. [Solution] A power extraction toy comprising a stopper for locking and stopping a vehicle toy having a pair of driving wheels, and a rotating body for extracting power from the pair of driving wheels of the vehicle toy stopped by the stopper, wherein the power extraction device comprises two of the rotating bodies configured to rotate independently of each other and for extracting power individually from each of the pair of driving wheels. Furthermore, a track board characterized by comprising the power extraction device.

The present application belongs to the field of engine design technology, and specifically relates to a method for determining the flight envelope of an aircraft turbofan engine. The method mainly includes: step S1, obtaining the load spectrum of the power extraction of aircraft accessories within the full envelope range and the comprehensive distortion index allowed by the engine inlet; step S2, determining the speed of the compression component of the turbofan engine when the engine stability margin is weakest; step S3, determining the stable working boundary of the engine after power extraction based on the speed of the compression component when the engine stability margin is weakest. The present application obtains the speed of the critical distortion index of the engine under different altitudes and different speed conditions through pressure distortion tests, thereby determining the flight envelope of the engine under the influence of actual power extraction, greatly improving the engine aerodynamic stability evaluation method, thereby giving the power extraction limit within the envelope range, and avoiding problems such as engine surge.

The application discloses an engine loading power extraction multi-load integrated control system and method, and belongs to the technical field of engine test control. The system comprises a host computer, a PLC control unit, a database and a field device layer. The field device layer comprises electronic load, hydraulic load, fuel load and air load branch. The host computer is used for mode selection, parameter setting, control instruction generation and state display; the PLC control unit is used for logical judgment, task allocation, interlocking protection and closed-loop correction; the database is used for operation data storage and management. For valve control load, the host computer generates a reference command current, and uses historical data and a prediction model to intelligently correct the initial current; the PLC combines field feedback to complete closed-loop regulation. The application integrates multiple loads into a unified control platform, realizes centralized monitoring, collaborative scheduling and unified data management, reduces the dependence on manual experience, and improves the load response speed, control accuracy and system integration.

The present invention discloses a constant current power supply optical network power supply system and a power supply method. At least one constant current power supply device is arranged between a near-end constant current power supply device and a far-end constant current power supply device, and the input end of each constant current power supply device is connected in series and the output end is connected in parallel. In each constant current power supply device, one control module and at least two constant voltage conversion modules with input ends connected in series and output ends connected in parallel are arranged. The control module calculates the real-time total output power of the constant current power supply device according to the real-time output power of each constant voltage conversion module, so as to judge the power demand of the power-consuming device, and dynamically control the working state of each constant voltage conversion module in real time, so as to achieve the purpose of adaptively adjusting the rated operating total power of the constant current power supply device according to the power demand of the power-consuming device, effectively improve the power conversion efficiency of the constant current power supply device when supplying power to the outside in a wide power range, and reduce thermal power consumption.

This radio frequency device (2), configured to perform at least one radio frequency function, comprises a metallic structure (4) defining an internal volume, at least one power injection element (16) at an inlet of the metallic structure (4), and at least one power extraction element (18) at an outlet of the metallic structure (4), arranged such that an electromagnetic wave is capable of propagating from said power injection element (16) to said power extraction element (18), at least a portion of the internal volume defined by the metallic structure (4) being filled with a solid dielectric foam (24) having a relative dielectric permittivity of less than 1.5. (See Figure 1 for abbreviations.)

The invention provides a CT power taking-wireless power transmission system and an output power optimization control method thereof, and relates to the technical field of power transmission line monitoring. The CT power taking-wireless power transmission system comprises a CT device, a CT power taking control circuit and a wireless power transmission conversion circuit, the CT device picks up electric energy from a magnetic field around a current-carrying wire based on magnetic field inductive coupling, the CT power taking control circuit comprises a rectifying and voltage-stabilizing circuit and a DC / DC converter, the rectifying and voltage-stabilizing circuit is used for performing rectifying and voltage-stabilizing processing on current flowing to a load from the CT device, and the DC / DC converter is used for converting the current to the CT device. DC voltage is obtained; the DC voltage is processed by the DC / DC converter to obtain an output voltage, and the output voltage is input to the wireless power transmission conversion circuit; the DC / DC converter is used for adjusting the equivalent impedance of the wireless power transmission conversion circuit so as to maximize the output power of the CT device. According to the invention, the DC / DC converter in the CT power taking control circuit is used for adjusting the equivalent impedance of the wireless power transmission conversion circuit, so that the overall output power of the system can be maximum.

A sensor arrangement for a gas powered turbine includes at least one sensor disposed on a power extraction shaft and configured to output a measured power extraction of the power extraction shaft. A controller is in communication with the at least one sensor. The controller includes a memory and a processor. The memory stores instructions for causing the processor to respond to a received measured power extraction of the power extraction shaft by synthesizing an instantaneous engine power output and engine efficiency and adjusting at least one parameter of the engine based on the synthesized engine power output and engine efficiency.

A method is presented for determining a setpoint signal of a wind energy conversion system. The method includes: providing a first input signal, comprising system frequency values of an electric power system, and a second input signal comprising an angular speed value of a wind energy conversion system; determining, from the first input signal, an intermediate signal comprising system frequency deviation values, the system frequency deviation values indicating deviations between the system frequency values and a target frequency value; determining, from the intermediate signal and the first input signal, a power correction signal comprising a first power value; determining, from the second input signal, a first reference signal comprising a second power value corresponding to a point of maximum power extraction of the wind energy conversion system; and determining a setpoint signal for setting an output power value of the wind energy conversion system.

The present invention provides a time domain burst signal extraction method, device, electronic device, and storage medium, belonging to the field of signal processing technology. The method comprises the following steps: obtaining an original power sequence of a time domain signal, the original power sequence including multiple original power points; cyclically shifting the positions of the original power points backward to obtain a time-shifted power sequence composed of the shifted original power points; determining multiple signal starting points and multiple signal end points based on the original power sequence and the time-shifted power sequence; determining the signal end points corresponding to each signal starting point; and extracting each time domain burst signal from the time domain signal based on each signal starting point and the corresponding signal end point. The present invention can extract a time domain burst signal based on the time domain signal power.

The application discloses a lithium battery thermal power extraction method and device combining POD and GRNN, and a medium, relates to the technical field of lithium batteries, and mainly comprises the following steps: acquiring a temperature-time change test curve of a lithium battery during discharging from a rated maximum voltage to a rated minimum voltage at each discharge rate, constructing a corresponding database, learning and training the relationship between the heat power and the modal coefficient, acquiring the corresponding modal coefficient, and acquiring a temperature-time change target curve based on the modal coefficient; according to the Pearson correlation coefficient between each target curve and the test curve, matching the heat power with the highest correlation for each time period corresponding to the discharge rate; learning and training the relationship between the modal and the system parameters; and simulating the surface temperature change of the lithium battery at the target discharge rate based on the trained network and the thermal model. The application does not require complex model construction or long-time testing, and improves the efficiency of heat power estimation.

The invention relates to a high-dynamic-performance micro-grid energy real-time balance control method which solves the problems that an existing micro-grid energy control method is generally poor in real-time performance and lacks high-power load impact resistance and energy real-time balance control during independent operation of a micro-grid. The method is based on a micro-grid direct-current bus interconnection architecture, adopts a master-slave and hierarchical control idea, and comprises a master-slave real-time energy control algorithm, a power feed-forward quick response algorithm and a low-delay filtering harmonic power extraction method. Unification of rapidity, reliability and stability of micro-grid energy control can be achieved, real-time balance of energy and power between complex sources and loads of the micro-grid is guaranteed, and the dynamic performance of the system is improved.

The present application provides a power supply rail and a rail system. The power supply rail comprises: a carrier, comprising a first side and a second side arranged opposite to each other in a thickness direction of the carrier; and a plurality of profiles, disposed on the second side and extending in a direction away from the first side. When viewed in a cross-section along a longitudinal direction of the carrier, the profiles have, in the direction of extension of the profiles, at least two electrical contact regions at different heights. In the present application, at least two electrical contact regions having different heights are arranged such that the power supply rail can effectively distribute an electric field when a connected device is in contact with the power supply rail. Compared with conventional designs employing a single-height electrical contact region, such an uneven height arrangement helps to reduce local electric field intensity and avoid electric field concentration, thereby significantly reducing the risk of insulation breakdown. In addition, this uneven height arrangement provides more options for power extraction by the rail system.