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公开(公告)号：US11988154B2
公开(公告)日：2024-05-21
申请号：US17535325
申请日：2021-11-24
申请人： THE BOEING COMPANY
发明人： Lijun Gao , Shengyi Liu
CPC分类号： F02C9/00 , F02C7/36 , F05D2220/36 , F05D2260/4031 , F05D2260/404 , F05D2270/02 , F05D2270/304
摘要： A direct drive electrically-geared turbofan is provided via a first magnetic gearbox assembly connected to a fan of a turbofan engine; a second magnetic gearbox assembly connected to a spool shaft of the turbofan engine; and a speed controller configured to adjust a rotational speed of the fan based on a rotational speed of the spool shaft by selectively coupling and decoupling the first magnetic gearbox assembly with the second magnetic gearbox assembly. In various aspects, the first or second magnetic gearbox assembly includes a permanent magnet array, while a different one of the first or second magnetic gearbox assemblies includes a rotor winding separated from the permanent magnet array by an air gap; and the speed controller is configured to selectively couple and decouple the first and second magnetic gearbox assemblies with each other via controlling a switch in a winding circuit with the rotor winding.
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42.发明授权公开(公告)号：US11848634B2
公开(公告)日：2023-12-19
申请号：US17668564
申请日：2022-02-10
申请人： The Boeing Company
发明人： Lijun Gao , Shengyi Liu
摘要： A system may include a variable frequency independent speed (VFIS) motor-generator. The system may further include a first power conditioner coupled to a set of stator windings of the VFIS motor-generator and a second power conditioner, distinct from the first power conditioner, coupled to a set of primary windings of a high-frequency transformer, where a set of secondary windings of the high-frequency transformer are coupled to a set of rotor windings of the VFIS motor-generator. A method may include providing a first power signal at the set of stator windings. The method may further include generating a second power signal at the second power conditioner for driving the set of rotor windings, where a shaft speed of the VFIS motor-generator is based on a difference between a first frequency of the first power signal and a second frequency of the second power signal.
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公开(公告)号：US20230216387A1
公开(公告)日：2023-07-06
申请号：US18150570
申请日：2023-01-05
申请人： The Boeing Company
发明人： Jeremiah Vannest , Lijun Gao , Julia Zhang , Shengyi Liu
CPC分类号： H02K19/38 , B64D27/24 , B64D2221/00 , H02J2310/44
摘要： A system, apparatus, and/or method for an aircraft that provides a novel independent-speed variable-frequency generator for aviation power generation. The generator architecture utilizes a 2-stage generator architecture with a wound rotor PM exciter (PME) that provides excitation to the rotor of a generator. A rotating bidirectional AC/DC/AC electric power converter connects the rotor windings of the exciter and the generator.
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公开(公告)号：US11146200B2
公开(公告)日：2021-10-12
申请号：US16814043
申请日：2020-03-10
申请人： The Boeing Company
发明人： Lijun Gao , Shengyi Liu
摘要： A system for controlling a motor may include an alternating current (AC) bus configured to transmit an AC power signal to a set of stator windings, where the AC power signal produces a first rotating magnetic flux at the set of stator windings. The system may also include a high frequency contactless transformer configured to transmit an excitation signal to a set of rotor windings, where the excitation signal produces a second rotating magnetic flux at the rotor. The system may also include electrical circuitry configured to determine a rotor voltage and a rotor current associated with the excitation signal, determine a rotor flux magnitude estimate and a rotor flux angle estimate based on the rotor voltage and the rotor current, and determine an inverter control signal operable to generate the excitation signal based at least partially on the rotor flux magnitude estimate and the rotor flux angle estimate.
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公开(公告)号：US20210288603A1
公开(公告)日：2021-09-16
申请号：US16814043
申请日：2020-03-10
申请人： The Boeing Company
发明人： Lijun Gao , Shengyi Liu
摘要： A system for controlling a motor may include an alternating current (AC) bus configured to transmit an AC power signal to a set of stator windings, where the AC power signal produces a first rotating magnetic flux at the set of stator windings. The system may also include a high frequency contactless transformer configured to transmit an excitation signal to a set of rotor windings, where the excitation signal produces a second rotating magnetic flux at the rotor. The system may also include electrical circuitry configured to determine a rotor voltage and a rotor current associated with the excitation signal, determine a rotor flux magnitude estimate and a rotor flux angle estimate based on the rotor voltage and the rotor current, and determine an inverter control signal operable to generate the excitation signal based at least partially on the rotor flux magnitude estimate and the rotor flux angle estimate.
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公开(公告)号：US11025183B2
公开(公告)日：2021-06-01
申请号：US16590134
申请日：2019-10-01
申请人： The Boeing Company
发明人： Lijun Gao , Shengyi Liu
摘要： A system may include an independent speed variable frequency (ISVF) generator configured to convert torque from a shaft to an AC power signal. The ISVF generator may have one or more pole pairs with an equivalent shaft frequency equaling a shaft frequency multiplied by the number of pole pairs. A generator control unit may set a generator output frequency of the ISVF generator equal to a lower frequency limit of an AC bus when the equivalent shaft frequency is less than the lower frequency limit, set the generator output frequency of the ISVF generator equal to an upper frequency limit of the AC bus when the equivalent shaft frequency is greater than the upper frequency limit, and set the generator output frequency of the ISVF generator equal to the equivalent shaft frequency when the equivalent shaft frequency is between the lower frequency limit and the upper frequency limit.
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公开(公告)号：US20210099117A1
公开(公告)日：2021-04-01
申请号：US16590134
申请日：2019-10-01
申请人： The Boeing Company
发明人： Lijun Gao , Shengyi Liu
摘要： A system may include an independent speed variable frequency (ISVF) generator configured to convert torque from a shaft to an AC power signal. The ISVF generator may have one or more pole pairs with an equivalent shaft frequency equaling a shaft frequency multiplied by the number of pole pairs. A generator control unit may set a generator output frequency of the ISVF generator equal to a lower frequency limit of an AC bus when the equivalent shaft frequency is less than the lower frequency limit, set the generator output frequency of the ISVF generator equal to an upper frequency limit of the AC bus when the equivalent shaft frequency is greater than the upper frequency limit, and set the generator output frequency of the ISVF generator equal to the equivalent shaft frequency when the equivalent shaft frequency is between the lower frequency limit and the upper frequency limit.
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公开(公告)号：US20200185959A1
公开(公告)日：2020-06-11
申请号：US16215323
申请日：2018-12-10
申请人： THE BOEING COMPANY
发明人： Daniel Coe Outlaw , Lijun Gao
摘要： A power conditioning unit includes unit a rectifier having an input terminal coupled to a power transfer unit output terminal and a regulator having an input terminal coupled to an output terminal of the rectifier. The power conditioning unit also includes an energy buffer coupled to an output terminal of the regulator. The power conditioning unit includes an inverter having an input terminal coupled to the energy buffer and having an output terminal configured to couple to a load.
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公开(公告)号：US20200180454A1
公开(公告)日：2020-06-11
申请号：US16215073
申请日：2018-12-10
申请人： The Boeing Company
发明人： Lijun Gao , Shengyi Liu
摘要： A hybrid electric propulsion system may include an independent speed variable frequency (ISVF) generator coupled to an alternating current (AC) bus via a first switch. The system may further include a variable frequency independent speed (VFIS) motor coupled to the AC bus via a second switch, the system omitting circuitry to perform a full-power rated power conversion between the ISVF generator and the VFIS motor. The system may also include an alternating current direct current (AC/DC) converter coupled to the AC bus via a third switch. The system may include a battery coupled to the AC/DC converter.
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公开(公告)号：US10547269B2
公开(公告)日：2020-01-28
申请号：US15982470
申请日：2018-05-17
申请人： The Boeing Company
发明人： Lijun Gao , Shengyi Liu
摘要： An electric motor apparatus may include a rotor and a stator. The apparatus may include a main field motor stage having a set of stator armature windings positioned on the stator and a set of main field windings positioned on the rotor, where the set of stator armature windings is configured to receive a main multiphase power signal from an alternating current power bus having a first current that causes a first rotating magnetic flux that rotates relative to the stator, where the set of main field windings is configured to receive a secondary multiphase power signal having a second current that causes a second rotating magnetic flux that rotates relative to the rotor, and where a combination of the first rotating magnetic flux and the second rotating magnetic flux causes the rotor to turn at a predetermined reference frequency.
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