[특허]Electrostatic propulsion systems and methods

[미국특허] Electrostatic propulsion systems and methods 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B64G-001/40
출원번호	US-0890477 (1997-07-09)
발명자 / 주소	Beattie John R. Goswitz Philip J.
대리인 / 주소	Gudmestad
인용정보	피인용 횟수 : 36 인용 특허 : 5

초록 ▼

Electrostatic propulsion systems for spacecraft include a plurality of electrostatic thrusters that are continuously coupled to power forms of a power supply system. Ionizable gas is fed to a selected one of the thrusters to selectively initiate the thrust of that electrostatic thruster. In other embodiments, heater power forms are coupled only to the selected thruster to reduce power consumption and increase cathode lifetime. The propulsion system has a reduced complexity and is especially suited for spacecraft in which only one thruster is ever fired at a given time.

대표청구항 ▼

[ We claim:] [1.] A method for limiting power consumption while applying selectable thrusts to a spacecraft, comprising the steps of:coupling a plurality of electrostatic thrusters to said spacecraft;configuring a magnetic field in each of said electrostatic thrusters to direct electrons along extended paths within said electrostatic thrusters; andperforming the following sequential steps:a) first, applying a heater power form to a heater of only a selected thruster of said electrostatic thrusters to generate an electron supply in said selected thruster;b) second, feeding said ionizable gas only to said selected thruster;c) third, applying a keeper power form to keeper electrodes of all of said thrusters to thereby establish a flow of electrons from said electron supply in said selected thruster;d) fourth, applying an accelerator power form to accelerator grids of all of said thrusters to thereby establish an electrostatic barrier in said selected thruster against outside electrons.e) fifth, applying a screen power form to screen grids of all of said thrusters to thereby extract an ion beam from a plasma in said selected thruster and accelerate said ion beam away from said selected thruster; andf) sixth, applying a discharge power form to an electrode system of all of said thrusters to thereby accelerate said electrons along said extended paths and generate said plasma in said selected thruster;power consumption limited by said heater power form applying step and thrust applied only in said selected thruster by said feeding step.

이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

Beattie John R. (Westlake Village CA), Electrostatic ion thruster with improved thrust modulation.
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Smith Peter (Hamshire GBX), Ion thruster with graphite accelerator grid.
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Brophy John R. (Valencia CA), Segmented ion thruster.
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Smith Peter (Clanfield GBX), Singly fueled multiple thrusters simultaneously energized by a common power supply.
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Brophy John R. (Valencia CA), Three-grid accelerator system for an ion propulsion engine.
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이 특허를 인용한 특허 (36) 인용/피인용 타임라인 분석

Sanborn, Graham; Ready, William Judson, Carbon nanotube field emission devices and methods of making same.
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Ockels, Wubbo Johannes; Nicolini, David; Jainandunsing, Shailindersing, Combined propulsion system intended for a spacecraft.
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Harmann, Hans-Peter; Koch, Norbert; Kornfeld, Guenter, Drive arrangement in a spacecraft.
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Lorand, Anthony Claude Bernard, Electric propulsion system with stationary plasma thrusters.
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Walther Stephan,DEX, Electrostatic propulsion engine with neutralizing ion source.
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Randolph, Thomas; Oh, David; Guenter, Fischer, Energy managed electric propulsion methods and systems for stationkeeping satellites.
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Burgess,Jeffrey S., Geostationary stationkeeping method.
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Leslie R. Warboys ; James A. Lukash ; Diana K. Mann, Hall effect electric propulsion system.
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Leiter, Hans; Mueller, Johann; Neumann, Horst; Scholze, Frank, Ion drive for a spacecraft.
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Wiseman,Steven L., Ion engine grid arcing protection circuit.
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Hartley,Frank T., Ion thrusting system.
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Hart, Stephen L., Lateral flow high voltage propellant isolator.
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Hart, Stephen L., Lateral flow high voltage propellant isolator.
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Hart, Stephen L., Lateral flow high voltage propellant isolator.
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Beattie, John Robert; Soni, Prakash C., Method and apparatus for balancing the emission current of neutralizers in ion thruster arrays.
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Grandics, Peter, Method and apparatus for converting electrostatic potential energy.
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Roy, Subrata, Method and apparatus for providing high control authority atmospheric plasma.
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Roy, Subrata, Method and apparatus for small satellite propulsion.
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Haque, Samudra, Method and system for a programmable and fault tolerant pulsed plasma thruster.
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Bekey, Ivan, Modular micropropulsion device and system.
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Gilchrist, Brian E.; Gallimore, Alec D.; Liu, Thomas M.; Musinski, Louis; Millunchick, Joanna Mirecki, Nano-particle field extraction thruster.
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Back Dwight Douglas ; Ramos Charlie, Noble gas storage and delivery system for ion propulsion.
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Back Dwight Douglas ; Ramos Charlie, Noble gas storage and flow control system for ion propulsion.
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Kadrnoschka, Werner; Killinger, Rainer; Kukies, Ralf; Leiter, Hans; Mueller, Johann; Schulte, Georg, Plasma generator and method for controlling a plasma generator.
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Miley George H. ; Gu Yibin ; Bromley Blair P. ; Nadler Jonathan H. ; Sved John,DEX, Plasma jet source using an inertial electrostatic confinement discharge plasma.
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Kornfeld,G체nter; Schwertfeger,Werner; Lenz,Roland; Coustou,Gregory, Plasma-accelerator configuration.
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Gonzalez,Encarnacion H., Power system for electrically powered land vehicle.
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Gonzalez,Encarnacion H., Power system for electrically powered land vehicle.
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Spanjers Gregory G., Pulsed plasma thruster with electric switch enabling use of a solid electrically conductive propellant.
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Calabro, Max, Resistojet.
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Doubrere, Patrick, Satellite comprising electrical propulsion means, method for placing such a satellite in a station and method for keeping said satellite in its station.
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Gilchrist, Brian E.; Gallimore, Alec D.; Keidar, Michael; Musinski, Louis; Liu, Thomas M., Scalable flat-panel nano-particle MEMS/NEMS thruster.
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Emsellem,Gregory, Spacecraft thruster.
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Poulos, Dennis, Stabilization of unstable space debris.
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Heng, Samuel; Pedenaud, Pierre, Water treatment in at least one membrane filtration unit for assisted recovery of hydrocarbons.
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Heng, Samuel; Pedenaud, Pierre; Coffin, Philippe, Water treatment in at least one membrane filtration unit for enhanced hydrocarbon recovery.
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A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Electrostatic propulsion systems and methods 원문보기