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1. 发明公开

EP4380022A1 CONTROLLER ARRANGEMENT FOR A SWITCHED-MODE ELECTRICAL POWER INVERTER, SWITCHED-MODE ELECTRICAL POWER INVERTER ARRANGEMENT, ELECTRICAL-POWER SYSTEM AND METHOD FOR CONTROLLING OPERATION OF A SWITCHED-MODE ELECTRICAL POWER INVERTER 审中-公开
公开(公告)号：EP4380022A1
公开(公告)日：2024-06-05
申请号：EP22210939.9
申请日：2022-12-01
申请人： Rolls-Royce Solutions GmbH , Rolls-Royce plc
发明人： Liu, Xiong , Zwerger, Tanja , Dasgupta, Souvik , Gupta, Amit
IPC分类号： H02M1/00
CPC分类号： H02M1/0012 , H02M7/53873
摘要： The invention relates to a controller arrangement (100) for controlling operation of an inverter in form of a switched-mode electrical power inverter, the controller arrangement having a control structure (106) comprising: a switching-element control-signal unit (180), that is configured to generate and provide a switching-element control signal (182) for controlling switching elements of the inverter. According to the invention, the control structure (106) further comprises: a transformation-control-computation unit (108), that is configured to determine and provide from a transformed three-phase voltage signal (102) and a reference voltage signal (104), a transformed voltage-control signal (110) in a synchronous-rotating reference frame of a fundamental frequency of the three-phase AC output voltage; and one or more resonant-control elements (120.1, 120.2, 120.n, 140.1, 140.2, 140.n), that receive the transformed voltage-control signal (110) and that are configured, using the transformed voltage-control signal (110), to provide a voltage-correction signal (122.1, 122.2, 122.n, 142.1, 142.2, 142.n) for use in generating the switching-element control signal (182).

2. 发明公开

EP3993206A1 ELECTRICAL POWER SYSTEM HAVING A DC BUS WITH VARIABLE VOLTAGE SETTING 有权
公开(公告)号：EP3993206A1
公开(公告)日：2022-05-04
申请号：EP21199037.9
申请日：2021-09-27
申请人： Rolls-Royce plc
发明人： Liu, Xiong , Zagrodnik, Michael , Gupta, Amit
IPC分类号： H02J1/10 , H02J4/00
摘要： Electrical power systems 10, 10i having variable-voltage DC busses 15 and methods of controlling voltage settings of such busses 15 are provided. One electrical power system 10, 10i comprises: a variable-voltage DC bus 15; a number N ≥ 2 of electrical machines G1-G4; M1-M4, each electrical machine G1-G4; M1-M4 connected to the variable-voltage DC bus 15 via one of a corresponding number N of converters 21-24; 31-34, each electrical machine G1-G4; M1-M4 and corresponding converter 21-24; 31-34 having an index n = (1,... , N); and a controller 17 configured to select a voltage setting V dc_bus for the variable-voltage DC bus 17 and to provide control signals to the converters 21-24; 31-34 to control the voltage setting of the variable-voltage DC bus 17 according to the selected voltage setting V dc_bus . The controller 17 is configured to select a voltage setting V dc_bus greater than or equal to a minimum voltage requirement V dc_min for the bus 15. The controller 17 is configured to determine the minimum voltage requirement V dc_min using present operating speeds of each of the N electrical machines G1-G4; M1-M4.

3. 发明公开

EP3849074A1 TORSIONAL MODE DAMPING CONTROLLER 审中-公开
公开(公告)号：EP3849074A1
公开(公告)日：2021-07-14
申请号：EP20214495.2
申请日：2020-12-16
申请人： Rolls-Royce plc
发明人： Kambrath, Jishnu , Liu, Xiong , Wang, Youyi , Ayu, Aaron
IPC分类号： H02P23/04 , H02P21/05 , H02P9/10
摘要： A torsional mode damping controller is provided for an electro-mechanical system in which power electronics provide electrical power to drive an electrical motor, and in which plural rotating masses, including a rotor of the electrical motor, are mechanically coupled to transmit torque therebetween. The controller modifies the electrical power provided to the electrical motor to provide active damping control of torsional vibration in the rotating masses. The controller is configured to: receive a measurement of a rotational speed of the rotating masses ω m and an estimate or a measurement of a torque transmitted between the rotating masses T sh ; based on the received transmitted torque T sh , generate a compensating torque to suppress vibration T com ; based on the received rotational speed ω m and the compensating torque T com , generate an electromagnetic torque modification signal T modi ; and modify the electrical power provided to the electrical motor on the basis of the electromagnetic torque modification signal T modi· The controller is further configured to generate the compensating torque T com by applying a filter to the received transmitted torque T sh , the filter being based on plural tunable parameters including a tuning gain K, a cut-off frequency ω n and a resonant damping ratio ζ.

4. 发明公开

EP3742596A1 POWER CONVERTER 有权
公开(公告)号：EP3742596A1
公开(公告)日：2020-11-25
申请号：EP20173175.9
申请日：2020-05-06
申请人： Rolls-Royce plc
发明人： Lai, Jih-Sheng , Venkatesh, Pabbathi , Liu, Xiong
IPC分类号： H02M7/08 , H02M5/458 , H02M1/12
摘要： A power converter. The power converter comprising: two or more multi-phase AC sources; an AC-DC converter circuit for each of the multi-phase AC sources, each AC-DC converter circuit being connected to a respective multi-phase AC source via a multi-phase input and configured to rectify a received multi-phase current into a DC current; a transformer, which is connected between the multi-phase AC inputs; a DC-link, shared between each of the AC-DC converter circuits; a load, connected to the DC-link and able to receive DC current therefrom; and a common mode filter, located within the DC-link, and configured to reduce a circulatory current which, when the power converter is in use, flows from the transformer through one of the AC-DC converter circuits, through the DC-link and through a further of the AC-DC converter circuits back to the transformer.

5. 发明授权

EP3386085B1 ELECTRICAL SYSTEM 有权转让
公开(公告)号：EP3386085B1
公开(公告)日：2020-09-30
申请号：EP18162749.8
申请日：2018-03-20
申请人： Rolls-Royce plc
发明人： Liu, Xiong , Gupta, Amit , Lai, Jih-Sheng
IPC分类号： H02M1/12 , H02M7/493 , H02M7/49 , H02J3/18 , H02P27/08 , H02P27/14 , H02M7/483 , H02M1/00 , H02M7/08 , H02M7/487 , H01F30/02

6. 发明公开

EP3386085A1 ELECTRICAL SYSTEM 有权转让
公开(公告)号：EP3386085A1
公开(公告)日：2018-10-10
申请号：EP18162749.8
申请日：2018-03-20
申请人： Rolls-Royce plc
发明人： Liu, Xiong , Gupta, Amit , Lai, Jih-Sheng
IPC分类号： H02M1/12 , H02M7/493 , H02M7/49 , H02J3/18 , H02P27/08 , H02P27/14 , H02M7/483 , H02M1/00 , H02M7/08 , H02M7/487 , H01F30/02
摘要： An electrical system including a first three-phase AC supply and a second three-phase AC supply; a phase-shifting transformer, connected to and receivable of AC power from each of the first three-phase AC supply and the second three-phase AC supply, said phase-shifting transformer applying a 30° phase shift to each of the received AC powers to thereby generate a first transformed AC current and a second transformed AC current; a first rectifier circuit and a second rectifier circuit, each connected to the phase-shifting transformer and receivable of the first transformed AC current and the second transformed AC current respectively, said rectifier circuits generating a first DC voltage and a second DC voltage; a first inverter circuit and a second inverter circuit, respectively connected to the first rectifier circuit and the second rectifier circuit, said inverter circuits generating a first AC output voltage and a second AC output voltage from the first DC voltage and second DC voltage respectively; and a load, connected to and receivable of the first AC output voltage and the second AC output voltage.

7. 发明公开

EP4012877A1 ELECTRICAL POWER SYSTEMS 有权
公开(公告)号：EP4012877A1
公开(公告)日：2022-06-15
申请号：EP21208370.3
申请日：2021-11-16
申请人： Rolls-Royce plc
发明人： Mountain, Stephen , Liu, Xiong , Venkatesh, Pabbathi
IPC分类号： H02J3/46
摘要： Electrical power systems and methods of controlling electrical power systems are described. One such electrical power system comprises: a first ac bus 21 and a first generator set 11, G1 configured to supply the first ac bus 21 with ac electrical power; a second ac bus 22 and a second generator set 12, G2 configured to supply the second ac bus 22 with ac electrical power; an interconnecting transformer 15 connected between the first and second ac busses 21, 22; a primary electrical load M1, M2 connected to both the first and second ac busses 21, 22 via a converter arrangement 31, 32; an auxiliary load 51 connected to the first ac bus 21; and a controller 17 configured to control the first generator set 11, G1 according to a first droop control profile and to control the second generator set 12, G2 according to a second droop control profile, the first and second droop control profiles relating respective generator operating frequencies of the first and second generator sets 11, G1; 12, G2 to respective output powers of the first and second generator sets 11, G1; 12, G2.

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