232 results about "Power extraction" patented technology

The invention relates to the technical field of sockets, and discloses an adapter and a track socket. The adapter comprises a first shell, an instantaneous action mechanism, a plug bush assembly and an electrode contact piece; the instantaneous action mechanism and the plug bush assembly are mounted in the first shell; the first shell comprises a base and a cover body, the cover body is rotatably arranged on the base, a panel of the cover body is provided with a bolt hole, and the side wall of the base is provided with an open hole; the electrode contact piece is electrically connected with the plug bush assembly, and the electrode contact piece and the cover body are respectively connected with the instantaneous action mechanism; and when the cover body rotates to enable the instant-acting mechanism to be in an instant-acting state, the instant-acting mechanism drives the electrode contact piece to extend out of or retract from the open hole. According to the adapter, transient contact power taking can be realized, current arc discharge is avoided, and safe use of a user is ensured.

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 utility model discloses a power lead-out structure for a battery pack, the battery pack and a vehicle, and the power lead-out structure for the battery pack comprises a fixed table, a power lead-out device and a power lead-out device, the leading-out wire row is accommodated in the accommodating groove; the lead-out wire row comprises a positive electrode lead-out wire row and a negative electrode lead-out wire row and is fixed on the fixed station. According to the power lead-out structure for the battery pack, the lead-out wire row is fixed on the fixing table, so that wiring in the shell is tidy, the internal space of the shell is saved, and arrangement of batteries and other structures is facilitated.

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.

1. The name of the product of this design: the main body of the power rail. 2. Purpose of the product with this design: The overall purpose of the product with this design is to be used as a power rail for the adapter to be inserted into to obtain power; the local purpose is the same as the overall purpose. 3. The key design features of this design product lie in the shape of the portion drawn with solid lines. The portion shown with dotted lines does not constitute part of the design for which protection is sought. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic drawing 1. 5. Designate Design 1 as the base design. 6. Other situations that require explanation: The enlarged view of the C-C section of Design 1 is the enlarged view of the section at C-C of the main view; the enlarged view of the D-D section of Design 2 is the enlarged view of the section at D-D of the main view.

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.

In certain embodiments, an ocean wave energy extraction system including a wave energy panel may capture kinetic energy from an ocean wave as a force applied to a flexible membrane that drives the WEP back and forth in a reciprocating motion. The WEP dimensions may be selected so that the energy extracted from the wave is maximized and the added mass is minimized. A flexible membrane may be supported on two opposite edges by structural members that may pivot about a base. The shape of the flexible membrane may reciprocate in response to alternating horizontal wave orbital velocities. The force applied to the flexible membrane may be transmitted through the structural members to a power extraction device, such as a hydraulic pump or an electrical generator, that may be mounted to the base. Multiple WEPs may be arranged parallel to the wave crest to produce additional power.

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 invention relates to an overhead AC line power supply device, comprising: an insulating device, which is used to be installed between phase conductors of different phases of an overhead AC line or between a phase conductor and a grounding member, and the insulating device has an insulating medium; a conductive layer, which is arranged along an equipotential layer in the insulating medium and is used to form an electrode; any two electrodes with different potentials are used to supply power to an electrical device. The present invention arranges a conductive layer along an equipotential layer in the insulating medium of the insulating device, and uses the conductive layer to form an electrode. There is a potential difference between different equipotential layers, and any two electrodes formed by the potential difference between the equipotential layers of the insulating device are used as power sources to supply power to the electrical device. The present invention can select a suitable equipotential layer for power supply according to the voltage requirements of the electrical device, and use the principle of capacitor voltage division to achieve power supply, which will not be affected by load changes or lightning impulse current, and provide a stable and controllable power supply for the electrical device.

The embodiment of the invention discloses an integrated electric drive axle power take-off control method and device and a medium, and relates to the technical field of power take-off control. The method comprises the steps that real-time vehicle data of a vehicle are collected, and vehicle power take-off conditions are judged according to the real-time vehicle data; when the vehicle power take-off condition is met, power take-off mode recognition is carried out through a vehicle control unit under triggering of an upper power take-off switch signal, a current power take-off mode is determined, and the current power take-off mode comprises any one of a driving power take-off mode and a parking power take-off mode; acquiring loading demand information of the loading equipment, and determining a loading demand rotating speed index of the loading equipment based on the loading demand information and pre-acquired loading equipment information; and according to the current power take-off mode, a rotating speed output path is determined, and the power take-off process of the loading equipment is controlled through a vehicle control unit on the basis of the loading demand rotating speed index and the rotating speed output path. And the vehicle power take-off condition is judged before power take-off, so that the risk of misoperation is reduced.

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 invention provides a loading power take-off control system and method and engineering equipment, and relates to the technical field of engineering equipment. The loading power take-off control system comprises a transfer case power take-off air cylinder and a transfer case gear shifting air cylinder, air supply of the transfer case power take-off air cylinder is controlled by at least two electromagnetic valve sets arranged in parallel, each electromagnetic valve set comprises a first electromagnetic valve and a second electromagnetic valve, any first electromagnetic valve can control the transfer case power take-off air cylinder to be in a power take-off gear when powered on, and any second electromagnetic valve can control the transfer case gear shifting air cylinder to be in a gear shifting gear when powered on. Any second electromagnetic valve can be electrified to control the transfer case power take-off air cylinder to be in a power take-off stop gear, and all the first electromagnetic valves can be electrified alternately. On the basis of the technical scheme, the first electromagnetic valves can be powered on alternately, the transfer case power take-off air cylinder can be located at the power take-off gear continuously, and therefore the working time of the first electromagnetic valves is shortened, and the probability that the power take-off electromagnetic valves are prone to being burnt out when the loading working duration time is long is reduced.

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.)