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公开(公告)号：US11680529B2
公开(公告)日：2023-06-20
申请号：US17108452
申请日：2020-12-01
Applicant: ROLLS-ROYCE plc
Inventor： Graham P Bruce
CPC classification number: F02C7/36 , H02J3/36 , H02K7/1823 , B64D27/10 , B64D27/24 , B64D2027/026
Abstract: An electrical system for connecting a rotary electric machine to dc networks operating at different voltages, the electric machine having polyphase winding sets each having a respective index. The electrical system has a first set of ac-dc converter circuits connected in a modular multilevel configuration, each ac-dc converter circuit having a respective index and an ac interface for connection with a corresponding winding set, and in which the modular multilevel configuration has dc outputs each having a respective index. The electrical system also has a set of dc-dc converter circuits each having a respective index and being configured to convert dc power between a voltage at a first dc interface and a voltage at a second dc interface, where a first dc interface of the nth dc-dc converter circuit is connected with the dc outputs of the modular multilevel configuration.
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公开(公告)号：US11512644B2
公开(公告)日：2022-11-29
申请号：US17369332
申请日：2021-07-07
Applicant: ROLLS-ROYCE plc
Inventor： Graham P Bruce , Stephen M Husband , David F Brookes
IPC: F02C7/268
Abstract: Gas turbine engines and methods of starting gas turbine engines, the gas turbine engine including: an electronic engine controller; one or more spools designated a starting spool for starting the engine, and has a required starting torque τs; a permanent magnet alternator mechanically coupled with the starting spool, the alternator, in a motor mode, provides a peak torque of τa, and, in a generator mode, generates electrical power for the electronic engine controller; and an electrical starter-generator mechanically coupled with the starting spool. The starter-generator in a motor mode, provides a peak torque of τsg, and, in a generator mode, generates electrical power for an external load. τsg+τa≥τs and τsg, τa
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公开(公告)号：US11634234B2
公开(公告)日：2023-04-25
申请号：US17545446
申请日：2021-12-08
Applicant: ROLLS-ROYCE PLC
Inventor： Graham P Bruce
Abstract: Electrical power system includes: one or more rotary electric machines, each mechanically coupled to a gas turbine engine spool; a set of converter circuits connected to the one or more rotary electric machines for conversion between alternating (ac) and direct current (dc), wherein one or more rotary electric machines and the set of converter circuits are arranged to output a number R≥2 of dc power channels, each dc power channel having a respective index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has a respective index n=(1, . . . , N). The switching arrangement is operable to connect a number Q≥1 of the N load channels to at least two different power channels of the R power channels.
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公开(公告)号：US11271487B2
公开(公告)日：2022-03-08
申请号：US17108476
申请日：2020-12-01
Applicant: ROLLS-ROYCE plc
Inventor： Graham P Bruce
Abstract: Electrical systems for connecting rotary electric machines to dc networks operating at different voltages V and W where V>W are provided, along with gas turbine engine arrangements incorporating such systems.
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公开(公告)号：US12221928B2
公开(公告)日：2025-02-11
申请号：US18141005
申请日：2023-04-28
Applicant: ROLLS-ROYCE PLC
Inventor： Graham P Bruce
Abstract: An electrical system for connecting a rotary electric machine to de networks operating at different voltages V and W where V>W, the electric machine has N=4 polyphase winding sets. The electrical system includes a first set of N=4 ac-dc converter circuits connected in a modular multilevel configuration, each ac-dc converter circuit having a respective index n=(1, . . . , 4) and an ac interface for connection with a corresponding nth winding set, and in which the modular multilevel configuration has P=5 dc outputs each having a respective index p=(1, . . . , 5), and a set of N=4 dc-dc converter circuits each having a respective index n=(1, . . . , 4) and being configured to convert dc power between a voltage V/4 at a first dc interface and a voltage W at a second dc interface.
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Patent Agency Ranking
公开(公告)号：US12202615B2
公开(公告)日：2025-01-21
申请号：US17545312
申请日：2021-12-08
Applicant: ROLLS-ROYCE plc
Inventor： Graham P Bruce
Abstract: Electrical power systems for distributing electrical power in arrangements including one or more gas turbine engines; one such system includes: one or more rotary electric machines coupled to a gas turbine engine spool; a set of converter circuits connected to the rotary electric machines converting between alternating current (ac) and direct current (dc), wherein the rotary electric machines and the converter circuits output a number R≥2 of dc power channels, each channel having an index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has an index n=(1, . . . , N). For each respective N load channels, a current limiting device (CLD) limits the current flowing from power channels to a load connectable to the electrical power system via the respective load channel.
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公开(公告)号：US11828186B2
公开(公告)日：2023-11-28
申请号：US17545347
申请日：2021-12-08
Applicant: ROLLS-ROYCE plc
Inventor： Graham P Bruce
IPC: F01D15/10 , H02K7/18 , H02J1/10 , B64D27/24 , B64D31/00 , H02H9/02 , B64D41/00 , H02J4/00 , B64D27/10 , B64D27/02
CPC classification number: F01D15/10 , B64D27/24 , B64D31/00 , B64D41/00 , H02H9/023 , H02J1/102 , H02J4/00 , H02K7/1823 , B60L2200/10 , B64D27/10 , B64D2027/026 , B64D2221/00 , F05D2220/323 , F05D2220/76 , H02J2310/44 , Y02T50/60
Abstract: Electrical power systems for distributing electrical power in arrangements including one or more gas turbine engines; one such system includes: one or more rotary electric machines, coupled to a gas turbine engine spool; converter circuits connected to the rotary electric machines converting between alternating current (ac) and direct current (dc), wherein the rotary electric machines and the converter circuits output a number R≥2 of dc power channels, each channel having an index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein each dc load channel has an index n=(1, . . . , N) and R
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公开(公告)号：US11646579B2
公开(公告)日：2023-05-09
申请号：US17001990
申请日：2020-08-25
Applicant: ROLLS-ROYCE plc
Inventor： Stephen M Husband , Jeffrey Hobday , Graham P Bruce , David F Brookes
CPC classification number: H02J1/102 , B64D35/02 , F02C7/36 , H02K7/1823 , B64D2221/00 , F01D15/10 , F02C6/206 , F05D2220/76 , Y02T50/50 , Y02T50/60
Abstract: Electrical systems for connecting rotary electric machines with gas turbine spools are provided. One such electrical system includes: a first rotary electric machine; a second rotary electric machine; a first set of bidirectional converter circuits; a second set of bidirectional converter circuits; and DC outputs for connection with an R-channel network. Each electrical machine is mechanically coupled with a respective gas turbine spool and has an identical even number N≥4 of phases, each phase having a respective index and including an identical number P≥1 of coils wound in a P-plex configuration in which adjacent phases are radially separated by 2π/NP mechanical radians. Each of the first and second converter circuits converts AC to and from DC, has a respective index n, and is connected with the P coils in the nth phase of the first and second rotary electric machines, respectively.
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公开(公告)号：US11643940B2
公开(公告)日：2023-05-09
申请号：US17545517
申请日：2021-12-08
Applicant: ROLLS-ROYCE PLC
Inventor： Graham P Bruce
IPC: F01D15/10 , H02J1/10 , H02K7/18 , B64D27/24 , B64D31/00 , H02H9/02 , B64D41/00 , H02J4/00 , B64D27/10 , B64D27/02
CPC classification number: F01D15/10 , B64D27/24 , B64D31/00 , B64D41/00 , H02H9/023 , H02J1/102 , H02J4/00 , H02K7/1823 , B60L2200/10 , B64D27/10 , B64D2027/026 , B64D2221/00 , F05D2220/323 , F05D2220/76 , H02J2310/44 , Y02T50/60
Abstract: Electrical power systems for distributing electrical power in aircraft are described. One such electrical power system comprises: an electrical power source configured to output a number R≥2 of dc power channels, each dc power channel having a respective index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein each dc load channel has a respective index n=(1, . . . , N) and R
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公开(公告)号：US11628943B2
公开(公告)日：2023-04-18
申请号：US17545302
申请日：2021-12-08
Applicant: ROLLS-ROYCE PLC
Inventor： Graham P Bruce
Abstract: Electrical power systems for distributing electrical power in aircraft are described. One such electrical power system comprises: an electrical power source configured to output a number R≥2 of dc power channels, each dc power channel having a respective index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has a respective index n=(1, . . . , N). The system further comprises, for each respective one of a plurality of the N load channels, a current limiting device (CLD) operable to limit an amount of current flowing from the power channels to a load connectable to the electrical power system via the respective load channel. The electrical power source may comprise one or more batteries.
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