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公开(公告)号：US20230159177A1
公开(公告)日：2023-05-25
申请号：US18053015
申请日：2022-11-07
申请人： ROLLS-ROYCE plc
CPC分类号： B64D27/24 , H02M3/28 , H02J1/106 , H02J7/34 , B64D2221/00 , H02J2310/44
摘要： The disclosure relates to an electrical power system for providing a stabilised DC voltage to a power bus. Example embodiments include an electrical power system comprising: a DC power bus having first and second DC power bus terminals; an electrical storage unit having first and second terminals, the second terminal connected to the second DC power bus terminal; a DC:DC converter having first and second DC:AC converters and a transformer connected between the first and second DC:AC converters, the first DC:AC converter connected between the first terminal of the electrical storage unit and the first DC power bus terminal; and a controller connected to control a switching operation of one or both of the first and second DC:AC converters.
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公开(公告)号：US20230136376A1
公开(公告)日：2023-05-04
申请号：US17957778
申请日：2022-09-30
申请人： Rolls-Royce plc
摘要： An electrical power system including: an electrical power source, a power electronics converter, an electrical network, a current limiting diode and a controllable circuit interruption device, wherein: the current limiting diode is configured to limit a fault current passing between the electrical power source and the electrical network in a fault condition; and the controllable circuit interruption device is configured to interrupt the fault current in response to a determination that the electrical power system is in the fault condition.
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公开(公告)号：US20240146208A1
公开(公告)日：2024-05-02
申请号：US18488386
申请日：2023-10-17
申请人： ROLLS-ROYCE plc
CPC分类号： H02M5/42 , B64D27/24 , H02M1/32 , B64D2027/026
摘要： The disclosure relates to an electrical power system with current fault protection provided by current limiting diodes. Example embodiments include an electrical power system comprising: an electrical machine; an AC:DC power electronics converter connected to receive an input AC supply from the electrical machine and provide an output DC supply across first and second output terminals; a DC bus connected to first and second output terminals of the AC:DC power electronics converter; a load connected across the DC bus; a first circuit breaker switch and a first current limiting diode connected in series between the AC:DC power electronics converter and the DC bus; and a second circuit breaker switch and a second current limiting diode connected in series between the DC bus and the load, wherein the first current limiting diode is configured to limit current to a higher level than the second current limiting diode.
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公开(公告)号：US20240084710A1
公开(公告)日：2024-03-14
申请号：US18204068
申请日：2023-05-31
申请人： ROLLS-ROYCE plc
发明人： David R TRAINER , Ellis FH CHONG , Mark SWEET , Gian INCERPI
CPC分类号： F01D15/10 , B64D27/24 , B64D2027/026
摘要： Reconfigurable permanent magnet electrical machines and aircraft power and propulsion systems including the electrical machines. An aircraft power and propulsion system includes: a gas turbine engine; DC electrical network; permanent magnet electrical machine including a rotor drivingly coupled to a spool of the engine, and a stator including windings controllably switchable between a star and a delta configuration; an AC-DC power electronics converter, an AC side is connected to terminals of the stator windings and a DC side is connected to the DC electrical network; an additional electrical power source connected to and controllable to supply electrical power to the DC electrical network; and a control system configured to control the switching of the stator windings between the configurations and to control the additional electrical power source to supply electrical power to the DC electrical network during a time interval when the stator is being switched between the configurations.
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公开(公告)号：US20230137501A1
公开(公告)日：2023-05-04
申请号：US17957273
申请日：2022-09-30
申请人： Rolls-Royce plc
摘要： There is provided a current limiting diode comprising a gate, a source, and a drain electrically connected to the source by an n-channel or p-channel; wherein the source and the gate are electrically connected by a fill structure comprising a phase-change fill material, and wherein the phase-change fill material is configured to absorb heat from the n-channel or p-channel by changing phase.
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公开(公告)号：US20170284351A1
公开(公告)日：2017-10-05
申请号：US15446584
申请日：2017-03-01
申请人： ROLLS-ROYCE plc
发明人： Gian INCERPI , Edward W. ADAMS
CPC分类号： F02M59/20 , F01D25/20 , F01M1/02 , F01M2001/0215 , F02C7/06 , F02C7/22 , F02C7/236 , F02C9/26 , F02M37/08 , F05D2260/84 , H02K9/005 , H02P6/04 , H02P29/024 , H02P29/0241 , Y02T50/671
摘要： A fuel and oil system comprising a fuel pump; an oil pump. A first electric motor controller configured to supply a variable electrical drive. A second electric motor controller configured to supply a variable electrical drive. A fixed electrical drive. The fuel pump is selectively connected to and driven by the first electric motor controller or the second electric motor controller. The oil pump is selectively connected to and driven by the second electric motor controller or the fixed electrical drive.
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公开(公告)号：US20240204594A1
公开(公告)日：2024-06-20
申请号：US18204112
申请日：2023-05-31
申请人： ROLLS-ROYCE plc
发明人： David R TRAINER , Ellis FH CHONG , Mark SWEET , Gian INCERPI
CPC分类号： H02K1/27 , B64D27/10 , H02K3/28 , H02K7/1823 , H02K11/33 , B64D2221/00
摘要： Reconfigurable permanent magnet electrical machines and aircraft power and propulsion systems comprising such electrical machines are described. In one aspect, an aircraft power and propulsion system comprises: a gas turbine engine; a permanent magnet electrical machine comprising a rotor drivingly coupled to a spool of the gas turbine engine, and a stator comprising windings controllably switchable between a star configuration and a delta configuration; a DC electrical network; an AC:DC power electronics converter, an AC side of which is connected to terminals of the stator windings of the electrical machine and a DC side of which is connected to the DC electrical network; and a control system. The control system is configured to monitor at least one operating condition of the power and propulsion system and to control the switching of the stator windings between the star configuration and the delta configuration based on the at least one operating condition.
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公开(公告)号：US20240002062A1
公开(公告)日：2024-01-04
申请号：US18333873
申请日：2023-06-13
申请人： ROLLS-ROYCE plc
摘要： The disclosure relates to an electrical power system for connecting an electrical machine to first and second DC networks operating at different voltages. In an embodiment, an electrical power system comprises: an electrical machine having first, second, third and fourth windings; first, second, third and fourth AC:DC power electronics converters each connected to receive an input AC supply from the respective first, second, third and fourth windings, each AC:DC power electronics converter having first and second DC output terminals connecting the AC:DC power electronics converters to first, second and third DC supply output terminals, wherein the first and second windings are arranged to provide an AC supply to the respective first and second AC:DC power electronics converters in quadrature to each other and the third and fourth windings are arranged to provide an AC supply to the respective third and fourth AC:DC power electronics converters in quadrature to each other.
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公开(公告)号：US20200052552A1
公开(公告)日：2020-02-13
申请号：US16516796
申请日：2019-07-19
申请人： ROLLS-ROYCE plc
发明人： Stephen M. HUSBAND , Gian INCERPI
摘要： An engine system comprises first and second electrical generators coupled to lower and higher pressure (LP, HP) shafts respectively of a gas turbine engine. A controller is arranged to receive a signal corresponding to a total electrical power demand P1 and to output control signals to the electrical generators in response thereto such that the first and second electrical generators output electrical powers (1−y)P1 and yP1 respectively when P1≤Pm1, where 0.5
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