11 results about "Composite power systems" patented technology

A controller and a power management method for a composite power system including first and second energy storage devices are provided. The controller includes: a computing circuit that generates a management function, receives a power demand command from the composite power system to obtain a current demand power, and provides an operating time constant corresponding to a minimum input power based on the current demand power and current SOCs of the first and second energy storage devices; a low-pass filter circuit that extracts a low-frequency part of the power demand command based on the operating time constant; and a power control circuit that subtracts the low-frequency part from the power demand command to extract a high-frequency part of the power demand command and controls the first and second energy storage devices to provide first and second electric energies in response to the low-frequency part and the high-frequency part.

The tip-jet autorotative rotor compound power system of the present invention features a high power-to-weight ratio and low fuel consumption. It includes a tip-jet rotor, a gas generator, an engine, a variable-pitch propeller, a centrifugal supercharger, a centrifugal clutch, and a fuel tank. This compound power system is achieved by two power sources during the vertical takeoff and landing phase and the forward flight phase. The engine can operate at full load throughout the process, making full use of the power. During vertical takeoff and landing, the engine drives the centrifugal supercharger to work under the transmission of the centrifugal clutch to generate compressed gas. At the same time, boost fuel injected into the fuel tank and the high-temperature exhaust gas of the engine are mixed and reacted in the gas generator to produce gas for tip injection, driving the rotor to rotate to generate the large lift required for lifting. During forward flight, the engine drives the variable-pitch propeller to work to propel the aircraft forward. At the same time, the rotor rotates at a low speed to maintain lift without consuming the engine power, overcoming the problem of the flight speed limitation of traditional helicopters and enabling a higher flight speed.

The application discloses a hydraulic composite power system and a container front crane, and relates to the technical field of hydraulic systems.The hydraulic composite power system comprises an oil tank, a battery module and an electric control module, the top of the oil tank is provided with an oil pump and an oil pump motor, the top of the oil tank is provided with an oil return pipe, and the hydraulic composite power system further comprises a filtering mechanism.The hydraulic composite power system and the container front crane are convenient for filtering and collecting impurities in hydraulic oil, can automatically discharge gas in the oil tank, can utilize the waste heat in the impurities to preheat the hydraulic oil in the oil tank, can recycle and reuse the waste heat, can automatically blow and clean the corner hole when hoisting, can automatically spray lubricating oil on the lock head to prevent rust and lubricate, and can detect the deformation of the lock head to prevent the lock head from being unable to normally insert into the container corner hole or being stuck when being unlocked.

A controller (100) and a power management method (S100) for first and second energy storage devices (PS1, PS2) are provided. The controller (100) includes: a computing circuit (110) that provides an operating time constant (τR) corresponding to a minimum input power (Jmin) based on a current demand power (PD) and current SOCs (SOC1, SOC2) of the first and second energy storage devices (PS1, PS2); a low-pass filter circuit (120) that extracts a low-frequency part (PL) of a power demand command (CMD) based on the operating time constant (τR); and a power control circuit (130) that extracts a high-frequency part (PH) of the power demand command (CMD) of the low-frequency part (PL) and controls the first and second energy storage devices (PS1, PS2) to provide first and second electric energies (PW1, PW2) in response to the low-frequency part (PL) and the high-frequency part (PH).

The application discloses a ship compound power system and a control method and device thereof, and relates to the technical field of ship power engineering. When the working power of a fuel engine is high, part of exhaust gas of the fuel engine provides heat for a reforming reaction subsystem, and part of the exhaust gas is used as raw material for a reforming reaction, and the reforming gas obtained by the reforming reaction subsystem is all recycled by the fuel engine. When the working power of the fuel engine is low, the fuel cell is controlled to be turned on to ensure power, and all the exhaust gas of the fuel engine is used to provide heat required by the system, and the hydrogen-rich reforming gas under the low working condition of the fuel engine is recycled to the fuel engine and the fuel cell for reuse. In the working process of the ship compound power system, a fuel cold energy processing subsystem exchanges heat between the fuel in a fuel storage tank and the reforming gas of the reforming reaction subsystem, improves the heat efficiency of the system, and liquefies and recovers carbon dioxide in the reforming gas.

The invention provides a hybrid power system and a control method thereof, a storage medium and equipment.The first storage equipment is connected to an anode exhaust port of a fuel cell, combustion-supporting gas exhausted from the anode exhaust port is stored through the first storage equipment, and a one-way valve is arranged on a gas inlet channel of an internal combustion engine; a first electromagnetic valve is arranged on a pipeline between the one-way valve and the first storage equipment, and the first electromagnetic valve is controlled to be opened or closed through a control unit, so that when the first electromagnetic valve is opened, combustion-supporting gas in the first storage equipment can be injected into a gas inlet channel of the internal combustion engine through the one-way valve to supply gas to the internal combustion engine; combustion-supporting gas exhausted from an anode exhaust port of the fuel cell is fully utilized, the complexity of a gas supply structure is reduced, and the energy utilization rate is increased.

This invention discloses a performance optimization method for a blade-tip jet hybrid propulsion system based on thermodynamic cycle planning, belonging to the field of aerospace hybrid propulsion technology. The method decomposes the design goals of high power-to-weight ratio and low fuel consumption of an aircraft propulsion system into optimization goals for the system's thermodynamic cycle parameters; identifies key parameters affecting cycle power and thermal efficiency, including compressor pressure ratio, turbine pressure ratio, rotor centrifugal pressure ratio, and blade-tip jet Mach number; collaboratively designs these strongly coupled key parameters and calculates system performance based on component models and energy conservation relationships; compares the calculated system power-to-weight ratio and fuel consumption with the optimization goals, and iteratively optimizes and adjusts component parameters until the optimization goals are met. This invention overcomes the limitations of traditional unidirectional engine design, achieving multi-level utilization and full recovery of system energy, and effectively solves the problem that traditional propulsion systems cannot simultaneously achieve high power-to-weight ratio and low fuel consumption.

The invention relates to the technical field of electric forklifts, in particular to a combined type power system of an electric forklift. The combined type power system of the electric forklift comprises a combined power circuit, a power battery, a charging interface, a normally-closed mechanical switch, a walking motor, an oil pump motor and an auxiliary load. By multiplexing power electronic devices, a smoothing capacitor and a walking motor stator winding in the composite power circuit, the composite power system can form a walking motor driving sub-circuit, an oil pump motor driving sub-circuit, a single-phase power factor correction charging sub-circuit and an auxiliary load power supply sub-circuit. Compared with a traditional electric forklift power system, the circuit structure of the electric forklift power system is simplified, the reliability of the system is improved, and meanwhile the combined type power system has the advantages of being small in size, low in cost and easy to install and maintain.

The invention discloses an ultra-long-distance pneumatic sheet conveying device, and relates to the technical field of pneumatic pipeline conveying, the ultra-long-distance pneumatic sheet conveying device comprises a conveying pipe, a pipe shell is mounted at the end part of the conveying pipe, brackets are symmetrically mounted in the pipe shell, accelerating pipes are mounted at the end parts of the brackets, and box bodies are symmetrically mounted on the outer walls of the accelerating pipes; the two sides of the box body are connected with an inner pipe and a bypass pipe correspondingly, a turbine is rotationally installed in the box body, through the modularized and structured mechanical design, a primary pushing and multi-stage relay suction hybrid power system is formed, a double superposition and positive feedback circulation mechanism is formed, and the power efficiency is improved. Relay compensation of pneumatic suspension conveying driving force of sheets is achieved, a dynamic and self-adaptive pneumatic conveying environment is created, the initial power requirement for sheet conveying is lowered, a common industrial blower can meet the driving force requirement, ultra-long-distance stable conveying of the sheets can be achieved with the lowest energy cost and the simplest equipment configuration, and the sheet conveying efficiency is improved. And cost reduction and benefit increase are realized.

The present invention discloses a photovoltaic-thermal synergistic drive fuel cell hybrid power system for improving efficiency and carbon fixation, which includes an MCFC battery, an SOEC electrolysis cell, a heat release device, an alcohol synthesizer, a photovoltaic power supply device, and a photothermal heating device. The thermal process of the present invention follows the scientific energy utilization principle of "matching temperature and cascaded utilization". The "synergy of solar photovoltaic and thermal energy" develops the characteristics of improving efficiency and carbon fixation of the fuel cell hybrid power system. The newly added heat release device provides high-temperature heat energy for the hydrogenation and alcoholization process of carbon dioxide, the photovoltaic energy provides electricity for the hydrogenation and alcoholization process of carbon dioxide, and the photothermal energy provides low-temperature separation heat energy for the purification process of alcohol substances. The present invention provides a new carbon fixation path for the fuel cell hybrid power system, making it no longer limited to the traditional carbon fixation path of compressed liquefied carbon dioxide, consuming a large amount of renewable energy, achieving carbon fixation without increasing carbon, and the hydrogenation and alcoholization process of carbon dioxide also improves the conventional hybrid power system, increasing efficiency while fixing carbon.

The invention discloses an electric vehicle hybrid power system integrating a photovoltaic vehicle body and flywheel energy storage, which comprises a photovoltaic array unit, a self-adaptive cascade rotary transformer assembly, a driving universal joint support frame and a double-winding magnetic coupling flywheel assembly, a primary winding and the photovoltaic array unit are connected in series to form a closed direct current excitation loop; a precession rotating shaft of the driving universal joint supporting frame drives a secondary rotor to generate precession angular speed, a secondary winding passively superposes photovoltaic excitation and precession induced potential in a physical loop, composite alternating voltage is output to a low-voltage photovoltaic winding, the low-voltage photovoltaic winding and a high-voltage bus winding in a motor stator configure the number of coprime pole pairs, and the high-voltage bus winding and the low-voltage photovoltaic winding are connected in series. Direct electromagnetic coupling is blocked, the high-rotational-inertia flywheel rotor absorbs power fluctuation of the composite alternating-current voltage for mechanical filtering, an alternating flux linkage is induced in the high-voltage bus winding, and finally high-voltage alternating-current electromotive force is output. According to the invention, photoelectric and mechanical energy bottom layer fusion, high and low voltage physical isolation and smooth energy transmission are realized.