EP3397555A1 - Verfahren zum antrieb eines luftfahrzeugs und luftfahrzeug - Google Patents
Verfahren zum antrieb eines luftfahrzeugs und luftfahrzeugInfo
- Publication number
- EP3397555A1 EP3397555A1 EP17705335.2A EP17705335A EP3397555A1 EP 3397555 A1 EP3397555 A1 EP 3397555A1 EP 17705335 A EP17705335 A EP 17705335A EP 3397555 A1 EP3397555 A1 EP 3397555A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aircraft
- operating state
- voltage
- operating
- operating voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/007—Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D31/00—Power plant control systems; Arrangement of power plant control systems in aircraft
- B64D31/16—Power plant control systems; Arrangement of power plant control systems in aircraft for electric power plants
- B64D31/18—Power plant control systems; Arrangement of power plant control systems in aircraft for electric power plants for hybrid-electric power plants
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K51/00—Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P17/00—Arrangements for controlling dynamo-electric gears
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/10—Air crafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/20—AC to AC converters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/026—Aircraft characterised by the type or position of power plants comprising different types of power plants, e.g. combination of a piston engine and a gas-turbine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/30—Aircraft characterised by electric power plants
- B64D27/33—Hybrid electric aircraft
Definitions
- a method for driving an aircraft and aircraft The invention relates to a method for driving an air ⁇ vehicle and an aircraft.
- Voltage can be modulated in both frequency and amplitude.
- the power converter typically have Halbleiterbauelemen- te, especially IGBTs and / or the power MOSFET on, wel ⁇ che are highly vulnerable to cosmic radiation.
- cosmic rays pose a significant threat to semiconductor devices.
- the flow of cosmic rays is higher at this altitude by a factor of about 20 to 60 than at sea level.
- Converters are therefore regularly eliminated due to a very probable failure. It is known that this circumstance by a permanent Vermin ⁇ tion of the operating voltage to the semiconductor devices or by an enlargement of the semiconductor layer to umge ⁇ hen. However, these measures increase the weight of inverters.
- the power to weight ratio (power per mass) is thereby greatly reduced, which can form an off-circuit ⁇ criterion in aviation.
- the thickness of the semiconductor layer is increased, the probability ei ⁇ nes failure of the semiconductor devices can even be increased because the interaction probability of the semiconductor material with cosmic radiation increases in proportion to the thickness.
- SiC and GaN have a higher band gap than Si, which leads to a strong reduction of a radiation avalanche breakdown.
- SiC and GaN devices are expensive because the crystal structure of SiC and GaN is more complex than that of silicon, making it difficult to grow and process these materials.
- the inventive method for driving an aerial vehicle ⁇ zeugs uses a Multilevelumrichter having at least two Converter modules.
- a first operating voltage is applied to at least one of the converter modules in a first operating state and a second operating voltage to a lower operating voltage in a second operating state.
- the inventive method is based on the Erfindungsge thank ⁇ , an aircraft by means of an as motors and generators genes ⁇ connecting Multilevelumrichters to drive such that the Multilevelumrichter the aircraft stromdimensio- ned is designed. This means that, although in a first operating state, useful in situations in which the aircraft is not exposed to any appreciable cosmic radiation, or the converter modules of the
- Multilevel inverter with high voltage and reduced currents are operated.
- a second operating state advantageously in such an operating state in which the aircraft is increasingly exposed to cosmic radiation - for example, as soon as a necessary altitude is reached ⁇ , a lower voltage for the or
- the applied voltage and / or a reverse voltage of the semiconductor device is the dominie ⁇ Rende influencing factor on the lifetime of Halbleiterbauele ⁇ elements at a high flow of cosmic radiation.
- changes in cruising altitude already in voltage changes of a few 10 volts near a threshold voltage as a result of cosmic radiation in the semiconductor device, as in a IGBT, generated amount of charge by two to three orders of magnitude ⁇ gene.
- This charge allows the semiconductor device are briefly lei ⁇ tend.
- the resulting heat then destroys the semiconductor device. According to the invention, this circumstance does not occur.
- the multilevel converter is electrically and mechanically separated into two or more converter modules. So can at the same
- the inventive method requires noperssserhö ⁇ hung the drive and consequently not the aircraft. At the same time, an increased probability of interaction with comic radiation can be avoided.
- the use of expensive inverter modules with semiconductor components, which are formed with SiC and / or GaN is, according to the invention not he ⁇ conducive.
- At least the first and the second of the at least two inverter modules are interchangeable similar prior ⁇ formed preferably identical. So can about
- Umrichtermodule depending on whether they are operated in the first or in the second operating state, serially or in parallel ge ⁇ switched.
- the multilevel converter is a voltage source converter.
- first and second operating voltage can be applied pulsed with the inventive method, the two ⁇ th operating voltage compared to the first operating voltage has a longer pulse durations.
- the reduced voltage level is partly compensated ⁇ part by the longer pulse duration.
- the reduced voltage level is expediently compensated by a higher current.
- the multilevel converter is preferably used to convert a generated AC voltage of a generator into an AC voltage supplying a drive motor.
- the multilevel converter is used to convert AC voltage, such as the appropriate adaptation of the frequency between the generator and the drive motor.
- the multilevel converter is a voltage source converter with submodules, which can be switched by means of power semiconductor components.
- the power semiconductor components are in the inventive method by means of SEN ⁇
- the second operating state is brought about during or after a start and / or ends before or during a landing of the aircraft.
- the second operating state extends entirely or predominantly to the phase of the cruise of the aircraft ⁇ .
- the multilevel converter of the aircraft is exposed to a high flux of cosmic radiation, so that in this development of the invention, the submodule or submodules are protected from cosmic radiation in the cruise phase.
- the cruise does not require maximum power delivery as required by the phases of takeoff and possibly landing.
- a further advantageous embodiment of the method according to the invention is by means of
- Multilevelumrichters provided power in the second Be ⁇ operating state at most 80 percent of the maximum power in the first operating state, preferably the power in the second operating state is at most 70 percent and ideally at most 60 percent. Regularly, the power requirement for cruising is considerably lower than when starting.
- the first operating state is advantageous in the inventive method before and / or during at least a portion of the launch of the aircraft and / or before and / or during at least a portion of the landing of the aircraft herbeige ⁇ leads. In this embodiment of the invention, a high maximum power is possible especially in those flight phases in which immediate power supplies may be required.
- the second operating state above a minimum height of the air ⁇ vehicle brought about is the dominant parameter for the cosmic ray flux to which the aircraft is exposed.
- the inventive method for driving a hybrid aircraft is performed.
- Hybridflug ⁇ witnesses, the problem of a conversion of generator power in engine power by means of converters.
- the aircraft according to the invention is designed to carry out a method according to the invention as described above.
- the aircraft according to the invention has a Electric drive, which at least one
- Multilevel converter with at least two converter modules.
- the at least two converter modules are in each case designed and supplied with a first operating voltage for feeding in a first operating state and in a second operating state with a second operating voltage which is lower than the respective first operating voltage.
- a control device is present, which is formed, depending on the altitude or a maneuver ⁇ maneuver, in particular depending on an initiated or imminent takeoff or landing, respectively, the first and / or the second operating state to switch.
- the control device expediently implements the method according to the invention as described above.
- the control device receives as input a measure of the altitude of the aircraft, which is detected by means of a detection means. Depending on the measure of the altitude of the first and / or second operating state is switched.
- the aircraft according to the invention is particularly preferably an aircraft, in particular a hybrid-electric aircraft.
- Fig. 1 shows an aircraft with a drive train with a
- FIG. 2 shows the multilevel converter of the aircraft according to FIG. Fig. 1 schematically in a block diagram
- FIG. 3 a converter module of the multilevel converter according to FIG.
- FIG. 2 schematically in a block diagram.
- the aircraft illustrated in FIG. 1 is a hybridelekt ⁇ innovative plane 10 and has a drive train 20.
- the drive train 20 includes a turbine 30, which as known per se provides rotational mechanical energy, if necessary, by means of combustion of propellant material and a Ge ⁇ ⁇ erator 40 received for converting the mechanical energy into electrical energy.
- the generator 40 provides the generic elekt ⁇ energy by means of an output-side AC voltage.
- the generator 40 feeds a rectifier 50, which rectifies the AC voltage of the generator 40.
- a rectifier 50 an active converter can be provided in a further, not specifically illustrated exemplary embodiment.
- an electric battery 60 of the hybrid electric aircraft 10 is charged.
- the battery 60 is provided as a permanent power source of the electric aircraft 10. In the case of draining the battery 60 or a sharp increase in energy demand, the turbine 30 and the generator 40 may be consulted for supplemental power.
- a modular Multilevelumrichter 70 is connected to this, wherein the DC voltage supplied by rectifier 50 and / or battery 60 um constitution of appropriate frequency in a suited for operating a Propel ⁇ lermotors 80 of the aircraft 10 alternating voltage.
- the propulsion unit 80 is attached ⁇ connected mechanically to drive a propeller 90 of the airplane 10th
- the multilevel converter 70 forms a voltage intermediate-circuit converter which (see FIG. 3) has three parallel-connected series circuits of each two converter modules SM per phase U, V, W. The single ones
- the propeller motor 80 requires a very predictable load profile during the flight of the aircraft 10: So tre ⁇ th only at the beginning during takeoff and climb one of the aircraft 10 power peaks. During the rest of the flight, especially during cruising, only about 60% of this power is needed.
- Multilevelumrichters 70 controlled by being switched to individual semicon ⁇ terbauimplantation submodules of the multilevel converter 70, here to the switch TO, Tl, voltage pulses adapted height and length.
- this problem does not occur according to the method according to the invention, by means of which the mutli-level converter 70 is controlled.
- Multilevel converter 70 very small (for comparison: the particle flow at sea level is about 150 times smaller than at 12 km altitude).
- the cosmic radiation is particularly critical:
- the altitude of the aircraft 10 is continuously detected by means of a not explicitly dargestell ⁇ th in the drawing controller. Above a threshold height, which passes through the aircraft 10 after takeoff and during the climb, now the voltage applied to the intermediate circuit of the Multilevelumrichters 70 and consequently also the voltage V c to the inverter modules SM of the Multilevelumrichters 70 is lowered so that the
- Inverter modules SM are connected in this operating state with voltage ⁇ pulses with lowered voltage.
- the voltage pulses are switched at the same time each with longer lasting pulse duration.
- To negotiatezu- provide the required power flow also higher currents, which are distributed over several ⁇ a zelne, smaller sub-modules 200 of the Multilevelumrichters 70th Details of the multilevel converter 70 are shown by way of example in FIG.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Inverter Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016202195.8A DE102016202195A1 (de) | 2016-02-12 | 2016-02-12 | Verfahren zum Antrieb eines Luftfahrzeugs und Luftfahrzeug |
| PCT/EP2017/052958 WO2017137537A1 (de) | 2016-02-12 | 2017-02-10 | Verfahren zum antrieb eines luftfahrzeugs und luftfahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3397555A1 true EP3397555A1 (de) | 2018-11-07 |
Family
ID=58046636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17705335.2A Withdrawn EP3397555A1 (de) | 2016-02-12 | 2017-02-10 | Verfahren zum antrieb eines luftfahrzeugs und luftfahrzeug |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20190152617A1 (de) |
| EP (1) | EP3397555A1 (de) |
| CN (1) | CN108602564A (de) |
| DE (1) | DE102016202195A1 (de) |
| WO (1) | WO2017137537A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021209701A1 (fr) * | 2020-04-15 | 2021-10-21 | Safran | Canal de propulsion pour aéronef |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018205141A1 (de) * | 2018-04-05 | 2019-10-10 | Siemens Aktiengesellschaft | Schwingungsgedämpfte Schaltungsanordnung, Umrichter und Luftfahrzeug mit einer derartigen Anordnung |
| DE102018206213A1 (de) * | 2018-04-23 | 2019-10-24 | Siemens Aktiengesellschaft | Verfahren zum Betrieb eines Umrichters, Anordnung mit einem Umrichter und Luftfahrzeug mit einem Umrichter |
| DE102018207033B3 (de) * | 2018-05-07 | 2019-07-04 | Siemens Aktiengesellschaft | Anordnung elektrischer Module, Stromrichter und Luftfahrzeug mit einer derartigen Anordnung sowie Verfahren zur Herstellung der Anordnung |
| FR3086926B1 (fr) * | 2018-10-09 | 2022-04-01 | Safran | Reseau d'alimentation electrique embarque d'un aeronef a propulsion electrique |
| DE102018221160A1 (de) * | 2018-12-06 | 2020-06-10 | Siemens Aktiengesellschaft | Isolierkeramik für elektrische Schaltungen und zugehörige Anwendungen |
| DE102019206872A1 (de) * | 2019-05-13 | 2020-11-19 | Rolls-Royce Deutschland Ltd & Co Kg | Minimalistischer Stromrichter und Fahrzeug mit einem Stromrichter |
| DE102019206896A1 (de) * | 2019-05-13 | 2020-11-19 | Siemens Aktiengesellschaft | Verbesserungen bei Leistungshalbleiterbauelementen auf Wärmerohren |
| AT523006B1 (de) * | 2019-10-02 | 2022-05-15 | Dynell Gmbh | Bodenstromaggregat für das Bereitstellen von elektrischer Energie für Fluggeräte |
| US12170496B2 (en) | 2020-03-04 | 2024-12-17 | Mitsubishi Electric Corporation | Motor control device |
| JP6877667B1 (ja) | 2020-03-04 | 2021-05-26 | 三菱電機株式会社 | モータ制御装置 |
| DE102020205087A1 (de) | 2020-04-22 | 2021-10-28 | Volkswagen Aktiengesellschaft | Verfahren zum Betreiben eines Flugobjekts und Flugobjekt |
| DE102020209359A1 (de) | 2020-07-24 | 2022-01-27 | Robert Bosch Gesellschaft mit beschränkter Haftung | Kurz- oder senkrechtstartfähiges Fluggerät, Leistungselektronik und Verfahren zum Betreiben des Fluggeräts |
| WO2022054155A1 (ja) | 2020-09-09 | 2022-03-17 | 三菱電機株式会社 | 電力変換装置及び電力変換装置を搭載した航空機 |
| US11952139B2 (en) * | 2021-05-14 | 2024-04-09 | Rolls-Royce Corporation | Voltage controlled aircraft electric propulsion system |
| EP4468587A4 (de) | 2022-01-19 | 2025-02-26 | Mitsubishi Electric Corporation | Leistungsumwandlungsvorrichtung und flugzeug |
| FR3145147A1 (fr) * | 2023-01-20 | 2024-07-26 | Ascendance Flight Technologies | Aéronef à source d’énergie hybride et à jonction à transistor de distribution et de protection |
| FR3145144A1 (fr) * | 2023-01-20 | 2024-07-26 | Ascendance Flight Technologies | Aéronef à source d’énergie hybride et à jonction à transistor de distribution et de protection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8345454B1 (en) * | 2009-11-21 | 2013-01-01 | The Boeing Company | Architecture and control method for dynamically conditioning multiple DC sources to driven an AC load |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5899411A (en) * | 1996-01-22 | 1999-05-04 | Sundstrand Corporation | Aircraft electrical system providing emergency power and electric starting of propulsion engines |
| DE19745492B4 (de) * | 1997-10-15 | 2005-06-09 | Wobben, Aloys, Dipl.-Ing. | Senkrecht startendes Flugzeug |
| FR2769952A1 (fr) * | 1997-10-20 | 1999-04-23 | Aerospatiale | Dispositif de demarrage pour turbine a gaz dans un aeronef |
| FR2936380B1 (fr) * | 2008-09-24 | 2010-10-29 | Messier Bugatti | Actionneur electrique qui integre deux onduleurs de tension controles en courant alimentant une machine electrique et qui est reconfigurable en presence d'un defaut |
| DE102008043626A1 (de) * | 2008-11-10 | 2010-05-20 | Airbus Deutschland Gmbh | Leistungsverteilungs-Vorrichtung zum Verteilen von Leistung und Verfahren zum Verteilen von Leistung |
| FR2941107B1 (fr) * | 2009-01-09 | 2015-08-14 | Hispano Suiza Sa | Systeme electrique de demarrage des moteurs d'un aeronef |
| US9478987B2 (en) * | 2009-11-10 | 2016-10-25 | Siemens Aktiengesellschaft | Power oscillation damping employing a full or partial conversion wind turbine |
| FR2959481B1 (fr) * | 2010-04-30 | 2013-02-08 | Hispano Suiza Sa | Actionnement des pales d'une soufflante non carenee |
| FR2961479B1 (fr) * | 2010-06-18 | 2014-01-17 | Sagem Defense Securite | Aeronef pourvu d'une pluralite d'actionneurs electriques, dispositif d'alimentation et de commande de tels actionneurs et ensemble d'actionnement correspondant |
| US20120203404A1 (en) * | 2011-02-04 | 2012-08-09 | GM Global Technology Operations LLC | Method for heating hybrid powertrain components |
| US8970065B2 (en) * | 2011-08-04 | 2015-03-03 | Eaton Corporation | System and method for increasing voltage in a photovoltaic inverter |
| FR2990573B1 (fr) * | 2012-05-11 | 2015-11-20 | Hispano Suiza Sa | Systeme de commande et d'alimentation en energie des turbomachines d'un helicoptere |
| DE102012209807A1 (de) * | 2012-06-12 | 2013-12-12 | Siemens Aktiengesellschaft | Flugzeug und Verfahren zum Herstellen eines Flugzeugs |
| DE102014203157A1 (de) * | 2014-02-21 | 2015-08-27 | Airbus Operations Gmbh | Bipolares Hochspannungsnetz und Verfahren zum Betreiben eines bipolaren Hochspannungsnetzes |
| DE102014203159A1 (de) * | 2014-02-21 | 2015-08-27 | Airbus Operations Gmbh | Brennstoffzellensystem in einem bipolaren Hochspannungsnetz und Verfahren zum Betreiben eines bipolaren Hochspannungsnetzes |
| US9923431B2 (en) * | 2014-12-15 | 2018-03-20 | Rolls-Royce Plc | Variable speed drive arrangement |
-
2016
- 2016-02-12 DE DE102016202195.8A patent/DE102016202195A1/de not_active Withdrawn
-
2017
- 2017-02-10 EP EP17705335.2A patent/EP3397555A1/de not_active Withdrawn
- 2017-02-10 WO PCT/EP2017/052958 patent/WO2017137537A1/de not_active Ceased
- 2017-02-10 CN CN201780010862.4A patent/CN108602564A/zh active Pending
- 2017-02-10 US US16/077,480 patent/US20190152617A1/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8345454B1 (en) * | 2009-11-21 | 2013-01-01 | The Boeing Company | Architecture and control method for dynamically conditioning multiple DC sources to driven an AC load |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021209701A1 (fr) * | 2020-04-15 | 2021-10-21 | Safran | Canal de propulsion pour aéronef |
| FR3109485A1 (fr) * | 2020-04-15 | 2021-10-22 | Safran | Canal de propulsion pour aéronef |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017137537A1 (de) | 2017-08-17 |
| CN108602564A (zh) | 2018-09-28 |
| DE102016202195A1 (de) | 2017-08-17 |
| US20190152617A1 (en) | 2019-05-23 |
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