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142 results about "Laser propulsion" patented technology
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Laser propulsion is a form of beam-powered propulsion where the energy source is a remote (usually ground-based) laser system and separate from the reaction mass. This form of propulsion differs from a conventional chemical rocket where both energy and reaction mass come from the solid or liquid propellants carried on board the vehicle.
Parallel Hybrid-Electric Propulsion Systems for Unmanned Aircraft
An unmanned air vehicle is provided, which includes an airframe and a parallel hybrid-electric propulsion system mounted on the airframe. The parallel hybrid-electric propulsion system includes an internal combustion engine and an electric motor. A hybrid controller is configured to control both the internal combustion engine and the electric motor. A propeller is connected to a mechanical link. The mechanical link couples the internal combustion engine and the electric motor to the propeller to drive the propeller. An alternate unmanned air vehicle includes a second propeller driven by the electric motor. In this alternate unmanned air vehicle, the internal combustion engine is decoupled from the electric motor.
Owner:GOVERNMENT OF THE UNITED STATES AS REPRESENTD BY THE SEC OF THE AIR FORCE
Hybrid Propulsion Vertical Take-Off and Landing Aircraft
A hybrid propulsion aircraft is described having a distributed electric propulsion system. The distributed electric propulsion system includes a turbo shaft engine that drives one or more generators through a gearbox. The generator provides AC power to a plurality of ducted fans (each being driven by an electric motor). The ducted fans may be integrated with the hybrid propulsion aircraft's wings. The wings can be pivotally attached to the fuselage, thereby allowing for vertical take-off and landing. The design of the hybrid propulsion aircraft mitigates undesirable transient behavior traditionally encountered during a transition from vertical flight to horizontal flight. Moreover, the hybrid propulsion aircraft offers a fast, constant-altitude transition, without requiring a climb or dive to transition. It also offers increased efficiency in both hover and forward flight versus other VTOL aircraft and a higher forward max speed than traditional rotorcraft.
Owner:AURORA FLIGHT SCI CORP
System, method, and apparatus for hybrid dynamic shape buoyant, dynamic lift-assisted air vehicle, employing aquatic-like propulsion
InactiveUS20080087762A1Economic securityEasy to operateNon-rigid airshipsDrag reductionMorphingMarine propulsion
A method and system for air flight is shown. The blended lifting body system includes a lift module, a propulsion module, a payload module and a control system. A conventional control system morphs the other modules through variable buoyant lift, internal structures and a flexible exterior, and varies bio-inspired oscillation in the propulsion module in order to facilitate takeoff, flight and landing. The hybrid dynamic / morphing shape buoyant, dynamic lift-assisted (hybrid) air vehicle, employing aquatic-like (e.g. fin) propulsion was discussed, with many variations and examples.
Owner:HOLLOMAN RICHARD +1
Beam mounted rear propulsion system for an aircraft and aircraft with such system
ActiveUS8220739B2Easy to operateAvoid mechanical interferencePower installationsAircraft power plant componentsJet engineFuselage
A propulsive system for an aircraft including an auxiliary jet engine is integrated into a tail cone of a fuselage. A carrying structure of the jet engine is primarily formed with beams and frames or half-frames to which the auxiliary jet engine is fixed by lateral beams. The beams are interdependent of the frames and half-frames, and the beams are overhanging behind a frame behind which is fixed the engine. Each beam includes a lower half-beam and a higher half-beam, separated on at least a part of its length ahead from attachments of the jet engine to determine a space free of structure impediment for lateral air intakes.
Owner:AIRBUS OPERATIONS (SAS)
Components for nano-scale Reactor
InactiveUS20040115830A1Compensation attenuationAvoid captureMaterial nanotechnologyFlow mixersEvaporationEngineering
Microfluidic devices and methods for operations on micro through nano-meter scales. Methods of processing, handling and analysis of yocto-liter scale volumes. Methods and devices for single-molecule transports in milli-scale dimensions. Methods of laser propulsion of individual cells and droplets. Methods of packaging and manufacturing of micro and nanofluidic devices. Method of improving dispensing accuracy. Methods of uses and manufacturing of micro-optico-fluidic devices. Bottom up processing method. Ionic particle deflector device. Smart package device and methods for high-throughput synthesis and screening. Methods and devices for controlled refills of micro stamps. Methods and devices for insitu concentration and dilution of micro volumes of solids and liquids. Methods and devices for eliminating undesirable dry outs and evaporation of microscale volumes of fluids.
Owner:TOUZOV IGOR
Laser propulsion thruster
InactiveUS20070056262A1Improve performanceMinimize contaminationCosmonautic vehiclesCosmonautic propulsion system apparatusElectromagnetic fieldIonization
A hybrid electric-laser propulsion (HELP) thruster. A propellant has self-regenerative surface morphology. A laser ablates the propellant to create an ionized exhaust plasma that is non-interfering with a trajectory path of expelled ions. An electromagnetic field generator generates an electromagnetic field that defines a thrust vector for the exhaust plasma. Multiple HELP thrusters may be ganged together, and controlled, according to mission criteria.
Owner:DESIGN NET ENG
Pneutrain pneumatic mass transportation system
This invention is a pneumatic mass transportation system on the cutting edge of technology employing a combined cycle turbine power system with digital controls to effect acceleration, deceleration and train propulsion. The combustion turbines can be adapted to use alternative fuels including bio fuels as they are developed. The heat recover steam generator will recycle the hot exhaust gasses from the turbines to generate electricity to be used by the system. The multi-car train is propelled by differential air pressure forward and aft of the vehicle in the pneumatic tube. Air propulsion is achieved by large in-tube impellers driven by the turbines. A digital control system will operate the pitch of the impeller blades and the vacuum / pressure release valves in the tubes to produce full movement control of the trains.
Owner:FLYNN PATRICK JOSEPH
Electromagnetic compatibility test method for electric propulsion system
ActiveCN101750545AImprove consistencyReduce mistakesCurrent/voltage measurementElectromagentic field characteristicsElectric fieldElectro magnetic compatibility
An electromagnetic compatibility test method for electric propulsion system comprises the following steps: wave transparent rate of wave transparent subsidiary cabins of electric propulsion system is measured; steady state and transient state electric field radiation of electric propulsion system and steady state power line conducted emission are measured; spike of power line when electric propulsion system is in transient state working condition is measured; conduction of fictitious load and radiation emission characteristic and actual thrustor are compared and measured; influence of plume to communication is measured to obtain electromagnetic compatibility test data of electric propulsion system. The inventive method is not required to be carried out in an electromagnetic compatibility laboratory, and can be tested on out-field or working site of electric propulsion system, the test result has little error and can authentically reflect electromagnetic compatibility of the propulsion system, thus greatly lowering test cost and improving working efficiency.
Owner:BEIJING INST OF SPACECRAFT SYST ENG
Vertical take-off and landing aircraft using hybrid-electric propulsion system
ActiveUS20170210481A1Improve efficiencyElectric power distributionEfficient propulsion technologiesElectrical batteryEngineering
A vertical take-off and landing aircraft using a hybrid electric propulsion system includes an engine, a generator that produces electric power using power supplied by the engine, and a battery that stores the produced electric power. A motor receives the electric power stored in the battery and electric power produced by the generator but not stored in the battery and provides the power to a thrust generating apparatus. A controller selects either silence mode or normal mode, and determines the amount of electric power stored in the battery and the amount of electric power not stored in the battery from the electric power supplied to the motor. In the silence mode, the controller supplies only the electric power stored in the battery and controls a duration by adjusting output power of motor. In the normal mode, the controller supplies electric power not stored in the battery.
Owner:KOREA AVIATION TECH KAT CO LTD +1
Novel electric propulsion system
InactiveCN101767645ASolve problems with high risk of failureSolve the large voltage drop of the gridPropulsion power plantsPropulsive elementsSynchronous motorDistribution power system
The invention discloses a novel electric propulsion system. The system comprises an internal combustion engine, an electric generator, an electric distribution system, a propulsion motor and a propeller, wherein the electric generator is in cable connection with the propulsion motor through the electric distribution system; the propulsion motor is connected with the propeller through a clutch and a speed reducer; both the electric generator and the propulsion motor are synchronous motors; and the propeller is an adjustable pitch propeller. The novel electric propulsion system effectively solves the problems of high investment cost, electric loss, severe harmonic pollution, difficult maintenance and high failure risk due to the adoption of a variable frequency technique by the electric propulsion system in the prior art and also solves the problems of high voltage drop in a system power grid and big torque born by a starting transient mechanical shaft due to the high starting transient current in the electric propulsion system in the prior art. The novel electric propulsion system has little investment, convenient installation and maintenance, a low running cost, high system reliability, low failure risk in a use process and a remarkable economic benefit.
Owner:浙江欣亚磁电发展有限公司
Radiation electromagnetic compatibility test method for electric propulsion system and on-star radio frequency equipment
ActiveCN102323507ACutting costsEffective verification of radiation electromagnetic compatibilityElectrical testingElectricityGps receiver
The invention discloses a radiation electromagnetic compatibility test method for an electric propulsion system and on-star radio frequency equipment. Firstly, an ion thruster is arranged in a wave transmitting secondary cabin; the wave transmitting secondary cabin is connected with a main vacuum tank; and electromagnetic radiation interference produced by a plume of the ion thruster is emitted out of the main vacuum tank through the wave transmitting secondary cabin. Each equipment and antenna are connected. When the electric propulsion system is started to normally work, both uplink level and downlink level of a responder are weak levels; conditions of uplink instruction reception and downlink remote metering error code are checked; if the instruction reception is correct, the code ratemeets the requirement and the responder is not interfered; remote metering parameters for a GPS (Global Positioning System) receiver are observed, and absolute positioning condition and relative positioning condition are determined; and if the remote metering is correct and the positioning is normal, the GPS receiver is not interfered.
Owner:AEROSPACE DONGFANGHONG SATELLITE
Autonomous sailboat for oceanographic monitoring
ActiveUS20140116311A1Efficient processAccurate monitoringAuxillariesWaterways transportMarine engineeringModularity
A fleet of autonomous sailing vessels that are equipped with monitoring and communication equipment for reporting environmental and other conditions. For optimal stability, the autonomous sailing vessels are multi-hulled vessels (catamarans) with self-righting capabilities. Each sailing vessel sends and receives information via one or more satellite links, using solar power to power the communications equipment as well as the monitoring equipment. Each sailing vessel includes an auto-sailtrim system to maintain a desired attack angle with the wind, and electric propulsion for use as required to maintain a desired heading. A modular design is used to support mission-specific payloads.
Owner:AUTONOMOUS MARINE SYST INC
Modular micropropulsion device and system
InactiveUS20080072565A1Reduce weightInexpensively mass-producedMachines/enginesUsing plasmaModularityPropellant
A modular propulsion system includes an array of micromachined field effect electrostatic propulsion devices, each of which is an assembled micromachined device including an array of field effect electrostatic propulsion thrusters, a fuel container of propellant using passive plumbing, electronic power and command controls, with the array of devices disposed about and on a surface of a spacecraft for providing diverse propulsion needs.
Owner:THE AEROSPACE CORPORATION
Space vehicle with electric propulsion and solid propellant chemical propulsion
ActiveUS20150021439A1Easy transitionSimple control systemCosmonautic propulsion system apparatusCosmonautic power supply systemsElectric powerSatellite
A space vehicle (1), in particular a satellite or a probe, capable of executing high-thrust maneuvers or high specific impulse maneuvers. According to the invention, the space vehicle (1) includes at least one solid-propellant chemical thruster (10-14) and at least one electric thruster (20-24).
Owner:GERAKL
Ship electric propulsion system with hybrid power supply of diesel generator set and power battery
InactiveCN102211657AAchieve energy saving and emission reductionEnsure navigation safetyPower plants using propulsion unit combinationsFrequency changerBusbar
The invention discloses a ship electric propulsion system with hybrid power supply of a diesel generator set and a power battery. The system comprises a ship control system, a power system, a distribution board and an electric propulsion system, wherein a power management controller and a propulsion manipulation controller are arranged in the ship control system; the power system is connected with the electric propulsion system through the distribution board; the power system and the distribution board are connected with the power management controller respectively; and the electric propulsion system is connected with the propulsion manipulation controller. A shore power distribution box, a diesel generator set and a power battery pack are arranged in the power system; a frequency converter is arranged in the electric propulsion system and connected with a propulsion motor; the propulsion motor is connected with a propeller; a busbar is arranged in the distribution board and provided with a main switch and a load switch; the main switch is connected with the generator set; and the load switch is connected with the frequency converter. By adopting the hybrid power supply mode of diesel generator set and power battery, the safe sailing of the ship is ensured, and the continuation performance of the ship is improved.
Owner:SHANGHAI MARITIME UNIVERSITY
Electric propulsion system for hybrid power boats and implementation method thereof
InactiveCN102120488AEnsure navigation safetyImprove battery lifePower plants using propulsion unit combinationsEmergency power supply arrangementsElectrical batteryEngineering
The invention discloses an electric propulsion system for hybrid power boats and an implementation method thereof, wherein the electric propulsion system is suitable for inland river medium and small-sized river boats and comprises a power battery used as a system main power supply and a diesel generator set used as an auxiliary power supply. When a boat berths alongside and suspends shipping services, the power battery is charged by a shore power so as to store electric energy; when the boat sails normally, the electric propulsion system is powered by the power battery; when the stored electric energy of the power battery are completely consumed or the power battery goes wrong in the process of sailing, the auxiliary diesel generator set automatically starts and puts into operation so as to continue to supply power for the electric propulsion system to maintain the sailing of the boat; and in emergency, the power battery and the diesel generator set work together to supply power for the electric propulsion system so as to ensure the sailing safety of the boat. By using the system and the implementation method of the system disclosed by the invention, boats can realize zero discharge of waste gas / water, and remarkable effects of energy saving and expenditure cutting are generated; meanwhile, the hybrid power supply mode of the power battery and the diesel generator set ensures the sailing safety of a boat and improves the duration performance of the boat.
Owner:SHANGHAI MARITIME UNIVERSITY
Comprehensive optimization method of simulation credibility evaluation model of electric propulsion system
The invention discloses a comprehensive optimization method of a simulation credibility evaluation model of an electric propulsion system. The comprehensive optimization method comprises the following steps: decomposing the electric propulsion system into multiple subsystems; decomposing the subsystems under various standards of a simulation system with an establishment process of system simulation as an evaluation standard until obtaining a minimum unit; carrying out topology modeling on the electric propulsion system; collecting branch voltages, a phase angle, active power and passive power of the electric propulsion system; adopting corresponding intelligent algorithms to optimize different attributes of the electric propulsion system to obtain a credibility evaluation optimization model; collecting data of an actual system under the same working condition, and using the credibility evaluation optimization model to test the actually collected data to obtain credibility; if the credibility is smaller than a credibility index n, carrying out topology modeling on the electric propulsion system again; and if the credibility is larger than the credibility index n, the credibility evaluation is terminated. The comprehensive optimization method disclosed by the invention is high in stability and is high in reliability.
Owner:HARBIN ENG UNIV
Hybrid-electric propulsion system for an aircraft
ActiveUS20190002115A1Jet type power plantsEfficient propulsion technologiesElectric dischargeElectric power
Owner:GENERAL ELECTRIC CO
Supercavitation gas-liquid multi-phase water spray propeller
InactiveCN1911729AGreat momentumPressure energy does not increasePropulsive elementsVapor liquidEngineering
The present invention is one kind of water-jetting propulsion system utilizing supercavitation in realizing vapor-liquid two phase propulsion. The water-jetting propulsion system consists of a water uptake chamber, a supercavitation impeller, an impeller chamber, a kinetic energy converter and a shafting. The supercavitation impeller with vanes designed based on Tulin supercavitating foil principle can operate normally under cavitation and supercavitation condition. Both the vapor phase and the liquid phase in the back of the impeller are converted in the kinetic energy converter before being jetted via the thruster to produce thrust in the outlet of the thruster. The kinetic energy converter can guide the flow of both the vapor phase and the liquid phase and convert the rotation kinetic energy of both the vapor phase and the liquid phase in the outlet of the impeller into axial flow kinetic energy without increasing the pressure of the two phase flow. The present invention realizes great power thrusting under cavitation condition.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Vertical Takeoff and Landing Vehicle with Increased Cruise Efficiency
Systems, methods, and devices are provided that combine an advance vehicle configuration, such as an advanced aircraft configuration, with the infusion of electric propulsion, thereby enabling a four times increase in range and endurance while maintaining a full vertical takeoff and landing (“VTOL”) and hover capability for the vehicle. Embodiments may provide vehicles with both VTOL and cruise efficient capabilities without the use of ground infrastructure. An embodiment vehicle may comprise a wing configured to tilt through a range of motion, a first series of electric motors coupled to the wing and each configured to drive an associated wing propeller, a tail configured to tilt through the range of motion, a second series of electric motors coupled to the tail and each configured to drive an associated tail propeller, and an electric propulsion system connected to the first series of electric motors and the second series of electric motors.
Owner:UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR NAT AERONAUTICS & SPACE ADMINISTRATION
Risk predictive evaluation method and device of ship integrated electric propulsion system
InactiveCN105894135AGuaranteed feasibilityGuaranteed reasonablenessForecastingResourcesFailure rateMarine engineering
The invention belongs to the power system risk evaluation technical field and provides a risk predictive evaluation method and device of a ship integrated electric propulsion system. The method includes the following steps that: the ship integrated electric propulsion system ship is divided into a plurality of subsystems, and all the sub systems are divided into a plurality of units; the failure rates and repair rates of all the units are calculated; the topological model of the ship integrated electric propulsion system is established; load flow calculation is performed on the ship integrated electric propulsion system under a normal working condition and a non normal working condition based on the topological model, so that risk evaluation results can be obtained; and the risk evaluation report of the ship integrated electric propulsion system is obtained according to the risk evaluation results. With the method and device of the invention adopted, the accurate risk evaluation results of the ship integrated electric propulsion system under different working conditions can be obtained, and therefore, a foundation can be laid for the improvement the performance of the ship electric propulsion system.
Owner:HARBIN ENG UNIV
Cold gas and ion compound propulsion system
ActiveCN106828982ASolve the problem of low specific impulseReduce weightCosmonautic vehiclesCosmonautic propulsion system apparatusMicrowaveAttitude control
The invention discloses a cold gas and ion compound propulsion system. The system comprises an ion propulsion system, a cold gas propulsion system, a power supply and a controller, wherein the ion propulsion system is used for main propulsion of an spacecraft and comprises an ion propeller, a neutralizer, a storage and supply unit and a solid-state microwave source; the storage and supply unit is connected with the ion propeller and the neutralizer to supply xenon to the ion propeller and the neutralizer; the solid-state microwave source is connected with the ion propeller and the neutralizer to supply microwaves to the ion propeller and the neutralizer; the cold gas propulsion system is used for short-time rapid maneuvering and attitude control of the spacecraft and comprises a cold gas thruster, and the storage and supply unit of the ion propulsion system is connected with the cold gas thruster to supply xenon to the cold gas thruster; the power supply is used for supplying power to the ion propulsion system and the cold gas propulsion system; the controller is used for precise control of the states of the ion propulsion system and the cold gas propulsion system. The cold gas and ion compound propulsion system has the advantages as follows: rapid maneuvering of the spacecraft is realized through cold gas propulsion, long-time and long-distance acceleration is realized through ion propulsion, and the propulsion system has high specific impulse.
Owner:SHANGHAI AEROSPACE CONTROL TECH INST
Water propulsion water rescue board
ActiveUS10035570B1Good conditionRescue time shortenedWater sport boardsPropulsion power plantsRechargeable cellPropeller
A water propulsion water rescue board with an integrated water propulsion jet to provide additional thrust for rescue maneuvers and different selectable thrust levels as needed during the maneuver. The water propulsion water rescue board includes a body having an upper surface and bottom surface, a length between nine feet and eleven feet from nose to tail, a thickness between 3.5 and 6 inches, and a water propulsion system integrated into the body including a water inlet on the bottom surface, and a water propulsion nozzle and propeller on the upper surface. An electric motor connects to rotate propeller for drawing water into the propulsion system and expels a pressurized column of water through the water propulsion nozzle. A removable rechargeable battery is connected with the electric motor and a controller with a user control pad on the top surface of the body to allow the user to control the operation of the water propulsion system.
Owner:JETSON SURF TECH LLC
All-satellite electromagnetic compatibility verification method and system based on electric propulsion radiation emission simulator
InactiveCN108205089ATo solve the requirement that ignition can only be carried out in a vacuum environmentEnables EMC assessmentMeasuring interference from external sourcesC bandingElectromagnetic radiation
Owner:CHINA ACADEMY OF SPACE TECHNOLOGY
Ship electric propulsion system with fuel cell and application method thereof
InactiveCN102145743AAchieving zero emissionsImprove protectionPropulsion based emission reductionPropulsion power plantsFloating chargeFuel cells
The invention discloses a novel ship electric propulsion system which adopts a power supply mode of taking a fuel cell as the main power supply and an energy storing battery pack as assistance. In the process from cold start to normal operation of a fuel cell system, or when the fuel cell system cannot output electric energy due to sudden failure, the electric propulsion system supplies emergency power by use of the energy storing battery; after the fuel cell system enters the normal operation state, the energy storing battery is in a floating charge state which can output electric energy anytime once the fuel cell system cannot supply power normally; in the case of sudden load reduction during the ship control or sudden effect of wind, wave or current, the electric propulsion system generates transient reverse power and produces regenerative electric energy; such regenerative electric energy is absorbed by the energy storing battery pack in the floating charge state so as to ensure the operation safety of the ship electric propulsion system; and by recycling the regenerative electric energy, the energy is saved. Through the invention, zero emission of the ship can be realized, and the ship electric propulsion system is a real green ship electric propulsion system.
Owner:SHANGHAI MARITIME UNIVERSITY
Watercraft reverse gate operation
A method of controlling a watercraft is disclosed which comprises actuating a reverse gate operator, sensing a speed of the watercraft, controlling a thrust generated by a jet propulsion system differently depending on whether the speed of the watercraft is above or below a predetermine watercraft speed when the reverse gate operator is actuated, and moving the reverse gate to a position in which the reverse gate redirects a jet of water expelled from the jet propulsion system in response to the actuation of the reverse gate operator. A watercraft implementing the above method is also disclosed.
Owner:BOMBARDIER RECREATIONAL PROD INC
Power optimized system for electric propulsion stationkeeping geosynchronous spacecraft
ActiveUS20080135685A1Reduction in required solar powerReduce power marginsCosmonautic propulsion system apparatusCosmonautic power supply systemsElectricitySystems design
Systems and methods are disclosed employing electric propulsion stationkeeping in a cyclical manner to better match the cyclical pattern of power generated by the solar array system. For a typical orbit design, e.g. a geostationary orbit, North-South stationkeeping can be intermittently suspended, tolerating some additional drift but yielding in a very significant reduction in the required solar power system. If necessary, stationkeeping can be supplemented with a chemical thrusters during off periods for the electric propulsion. Because of this, the overall electrical power margin for the solar array system design can be reduced without compromising the mission performance.
Owner:THE BOEING CO
Laser propulsion aircraft with vector nozzle
ActiveCN102390547AGood aerodynamic shapeLower performance requirementsCosmonautic propulsion system apparatusFlat glassThrust chamber
The invention discloses a laser propulsion aircraft with vector nozzle, comprising an effective load and control instrument bay (1), a propellant storage box (2), a plane reflecting mirror (3), a concave paraboloid reflecting mirror (4), a convex paraboloid reflecting mirror (5), a high transmittance plate glass (6) and a laser propulsion engine (7). The effective load and control instrument bay is set on the head of the aircraft; said propellant storage box is set in the middle part of the aircraft and is adjacent to the effective load and control instrument bay. The concave paraboloid reflecting mirror and the convex paraboloid reflecting mirror are set on the aircraft belly on the back position, wherein the two mirrors have the same axle line and focus. The high transmittance plate glass is set below the convex paraboloid reflecting mirror and is round plate glass, and diameter thereof is slightly bigger than that of the concave paraboloid reflecting mirror, and is embedded in the shell of the aircraft belly. The plane reflecting mirror is set on the top of the concave paraboloid reflecting mirror. The invention provides a laser propulsion aircraft, which has uncorrelated propulsion direction and laser beam direction, pollution free engine and lower requirement on performance of laser incoming window of the thrust chamber, for aerospace launch and proximity space flight.
Owner:深圳巡天空间技术有限公司
Spacecraft propulsion system and method
InactiveUS20170210493A1Reduce thrustIncrease thrustCosmonautic vehiclesCosmonautic propulsion system apparatusElectricityElectrical load
A space propulsion system includes an electrostatic thruster with a first electrical load; a resistojet; a propellant fluid feed circuit; and an electrical power supply circuit including a first power supply line and a first switch for selecting between connecting the first power supply line to the resistojet and connecting the first power supply line to the first electrical load of the electrostatic thruster. The propulsion system thus enables a space propulsion method to be applied that includes a switching step for selecting a first propulsion mode in which the resistojet is activated, or a second propulsion mode in which the electrostatic thruster is activated.
Owner:SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
Marine extended-range fuel cell hybrid electric propulsion system and control strategy thereof
InactiveCN110001908AReduce weightReduce complexityPower plants using propulsion unit combinationsPropulsive elementsFuel cellsEngineering
The invention discloses a marine extended-range fuel cell hybrid electric propulsion system and a control strategy thereof. The marine extended-range fuel cell hybrid electric propulsion system is suitable for small-and-medium-sized ships in inland rivers and lakes, and is the hybrid electric propulsion system that uses a lithium battery as a main power source of the electric propulsion system andallows the lithium battery and a fuel cell engine to be grid-connected to be used as a range extender through a diode and a controllable switch. On the one hand, in the navigation process of a ship,when the nuclear charge state of the lithium battery is low, the fuel cell engine is started to charge the lithium battery, and the cruising ability of an electric propulsion ship is improved; and onthe other hand, the fuel cell engine and the lithium battery are grid-connected when the power output is large, the advantages of the lithium battery are fully exerted, the application defects of a fuel cell are overcome, multiple working modes are applied to be switched to each other, the sailing working conditions of the ship are met, and the effects of energy conservation and emission reductionare achieved.
Owner:JIMEI UNIV
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