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1. 发明公开

EP4383537A1 POWER ELECTRONICS CONVERTER THERMAL MANAGEMENT 审中-公开
公开(公告)号：EP4383537A1
公开(公告)日：2024-06-12
申请号：EP23208827.8
申请日：2023-11-09
申请人： Rolls-Royce plc
发明人： Nadarajan, Sivakumar , Mohamed Halick, Mohamed Sathik , Vaiyapuri, Viswanathan , Prasanth, Sunderarajan , Gupta, Amit
IPC分类号： H02M1/32
CPC分类号： H02M1/327
摘要： The disclosure relates to thermal management of a power electronics converter. An example embodiment includes a power electronics converter (300) comprising: a first set of terminals (301, 302) connectable to a first voltage supply; a second set of terminals (305, 306, 307) connectable to a second voltage supply (308); a plurality of semiconductor switches (3031-6) connected between the first and second sets of terminals (301, 302, 305, 306, 307); a voltage sensor (307) connected to measure a voltage across the second supply (308); a current sensor (308) connected to measure a current through the second supply (308); and a controller (311) connected to provide switching signals to the semiconductor switches (3031-6) and to receive voltage and current signals from the voltage and current sensors (307, 308), the controller (311) configured, for each of the semiconductor switches (3031-6), to: determine a junction temperature (Tj) of the semiconductor switch (3031-6); compare the determined junction temperature (Tj) to a reference temperature (Tj_ref); and adjust a switching gate voltage applied to the semiconductor switch (3031-6) to reduce a conduction loss if the determined junction temperature (Tj) exceeds the reference temperature (Tj_ref).

2. 发明公开

EP4329149A1 CONTROLLER FOR A NUMBER OF COMPONENTS OF A HYBRID ELECTRICAL-POWER SYSTEM OF A HYBRID MICROGRID, HYBRID ELECTRICAL-POWER SYSTEM AND HYBRID MICROGRID 审中-公开
公开(公告)号：EP4329149A1
公开(公告)日：2024-02-28
申请号：EP22192477.2
申请日：2022-08-26
申请人： Rolls-Royce Solutions Augsburg GmbH , Rolls-Royce plc
发明人： Kumar, Logesh , Nadarajan, Sivakumar , Dasgupta, Souvik , Venkatraman, Aditya , Mücke, Marcus , Gupta, Amit
IPC分类号： H02J13/00 , H02J3/00
摘要： The invention regards a controller (100) for a number of components of a hybrid electrical-power system (200) of a hybrid microgrid, in particular for the hybrid electrical-power system (200) with the number of components, wherein a component is a hybrid electrical-power-generating asset (200.n) for providing electrical power for use in the hybrid microgrid, wherein the hybrid electrical-power-generating asset (200.1, 200.2, 200.N) comprises a genset and an electrical power storage. According to the invention the controller (100) comprises:
- a condition-information input interface (102) for receiving condition-information (104) indicative of an or a number of fault-related aspects of the hybrid electrical-power-generating asset (200.1, 200.2. 200.N);
- a health-status-estimation module (MODI, 110) that receives the condition-information (104) and is configured, using the condition-information (104), to determine and provide health-status information (112) for the given hybrid electrical-power-generating asset (200.1, 200.2, 200.N), which is indicative of a current operative condition of the given hybrid electrical-power-generating asset (200.n);
- a limitation-estimation module (MOD2, 120) that receives the determined health-status information (112) and is configured, using the health-status information (112), to determine and provide power-provision information (116) indicative of a current limitation of a provision of power of the given hybrid electrical-power-generating asset (200.n) due to its current operative condition; and
- a power-dispatch module (MOD3, 130) that receives the power-provision information (116) and load information (108) indicative of a magnitude of a load (300) of the hybrid electrical-power system (200) and is configured, using the power-provision information (116) and the load information (108), to determine and provide an operation-control setting (134) to the given hybrid electrical-power-generating asset (200.n).

3. 发明公开

EP3214757A1 ELECTRICAL MACHINE COMPONENT FAILURE DETECTION APPARATUS AND METHOD 有权转让
标题翻译：电机组件故障检测装置和方法
公开(公告)号：EP3214757A1
公开(公告)日：2017-09-06
申请号：EP16198003.2
申请日：2016-11-09
申请人： Rolls-Royce plc
发明人： Viswanathan, Vaiyapuri , Nadarajan, Sivakumar , Gupta, Amit
IPC分类号： H02P29/00 , H02P29/024 , G01R31/34
CPC分类号： G01R31/02 , G01R31/34 , H02P9/14 , H02P25/03 , H02P29/0241
摘要： A rectifier diode failure detection apparatus for an electrical machine (10), the electrical machine (10) comprising an exciter armature winding (28a-c), a rotor main field winding (24) and first and second rectifiers (34a, 34b) arranged in parallel, each rectifier (34a, 34b) comprising at least first and second diodes (38a, 38b), each rectifier being configured to independently supply the rotor main field winding (24) with DC electrical current, the failure detection apparatus comprising:
a controller (40) comprising at least two current sensors (42a, 42b), each current sensor (42a, 42b) being configured to measure output current (I f1 , I f2 ) of a respective one of the rectifiers (34a, 34b), and the controller (40) being configured to determine a harmonic of the measured rectifier output currents; the controller (40) being further configured to determine a ratio of the magnitude of the first rectifier (34a) output current harmonic to the magnitude of the second rectifier (34b) output current harmonic, wherein the controller (40) is configured to determine that a fault has occurred in one of the rectifier diodes (38a, 38b) where the ratio exceeds a threshold value.
摘要翻译：一种用于电机（10）的整流器二极管故障检测装置，电机（10）包括励磁机电枢绕组（28a-c），转子主励磁绕组（24）以及第一和第二整流器（34a，34b）并联地，每个整流器（34a，34b）至少包括第一和第二二极管（38a，38b），每个整流器被配置为向所述转子主励磁绕组（24）独立地供应DC电流，所述故障检测装置包括：包括至少两个电流传感器（42a，42b）的控制器（40），每个电流传感器（42a，42b）被配置为测量整流器（34a，34b）中的相应一个的输出电流（If1，If2）控制器（40）被配置为确定所测量的整流器输出电流的谐波; 所述控制器（40）进一步被配置为确定所述第一整流器（34a）输出电流谐波的幅度与所述第二整流器（34b）输出电流谐波的幅度的比率，其中所述控制器（40）被配置为确定在比率超过阈值的整流二极管（38a，38b）之一中发生故障。

4. 发明公开

EP2905630A3 Fault detection in brushless exciters 有权转让
标题翻译：检测无刷励磁错误
公开(公告)号：EP2905630A3
公开(公告)日：2016-01-20
申请号：EP14198243.9
申请日：2014-12-16
申请人： Rolls-Royce plc
发明人： Viswanathan, Vaiyapuri , Gajanayake, Chandana , Gupta, Amit , Nadarajan, Sivakumar
IPC分类号： G01R31/34 , H02H7/06
CPC分类号： G01R31/343 , H02H7/065 , H02P9/00 , H02P9/102 , H02P11/00
摘要： A method for detecting a fault in an exciter circuit, suitable for use in a brushless generator, the exciter circuit including (a) an exciter armature winding, having a plurality of armatures, arranged to generate a multiphase AC signal, each armature of the plurality of armatures providing a respective sub-signal component of the multiphase AC signal, and (b) a rectifier circuit for receiving the sub-signals via the respective armatures, the rectifier circuit comprising a plurality of components arranged to rectify the sub-signals to provide a rectified output signal, wherein the method includes the steps of: acquiring a respective operational sub-value for a first characteristic of each of at least two of the respective sub-signals; deriving an operational value indicative of a relationship between the acquired respective operational sub-values; determining whether a fault has occurred in the exciter circuit on the basis of the derived operational value.

5. 发明公开

EP2919027A1 Fault detection in induction machines 无效转让
标题翻译： Fehlererkennung in Induktionsmaschinen
公开(公告)号：EP2919027A1
公开(公告)日：2015-09-16
申请号：EP15155695.8
申请日：2015-02-19
申请人： Rolls-Royce plc
发明人： Athikessavan, Subash , Nadarajan, Sivakumar , Gupta, Amit , Panda, Sanjib
IPC分类号： G01R31/34
CPC分类号： G01R31/343
摘要： A method of detecting a fault in an induction machine having one or more windings arranged to draw current at a supply frequency, the method comprising :
performing a process of judging whether a respective sideband of one or more selected harmonics of the supply frequency exists at a predetermined fault frequency in a signal in the one or more windings; and
determining that a fault has occurred if the judgement is positive;
wherein in the judging process each of the selected harmonics of the supply frequency is a harmonic frequency of the supply frequency other than the supply frequency itself.
摘要翻译：一种用于检测感应电机中的故障的方法，所述感应电机具有布置成以电源频率抽取电流的一个或多个绕组，所述方法包括：执行判断电源频率中一个或多个所选谐波的相应边带是否存在于在一个或多个绕组中的信号中的预定故障频率; 并确定如果判断为正的话，则发生故障; 其中，在所述判断处理中，供给频率的选择谐波中的每一个是供给频率本身以外的供给频率的谐波频率。

6. 发明公开

EP4236051A1 CONVERTER BUILDING BLOCK, MODULAR ISOLATED ACTIVE BRIDGE, IN PARTICULAR MULTI-ACTIVE-BRIDGE, DC/DC CONVERTER CIRCUIT AND DC/DC CONVERTER ARRANGEMENT 审中-实审
公开(公告)号：EP4236051A1
公开(公告)日：2023-08-30
申请号：EP22158643.1
申请日：2022-02-24
申请人： Rolls-Royce Solutions GmbH , Rolls-Royce plc
发明人： Sasongko, Firman , Kotturu, Janardhana , Peng, Yaxin , Simanjorang, Rejeki , Vaiyapuri, Viswanathan , Dasgupta, Souvik , Gupta, Amit , Neubauer, Steffen
IPC分类号： H02M3/335 , H02M1/00
摘要： The invention regards a converter building block (100), wherein the converter building block is adapted for use in a modular isolated active bridge DC/DC converter circuit, in particular a multi-active-bridge DC/DC converter circuit. According to the invention the converter building block (100) comprises bidirectional DC/AC converter circuit comprising a number of switching elements (102.1-102.4). Moreover, the converter building block comprises a controller unit (106), wherein the controller unit (106) is configured to generate an internal switching-element control signal (110) for controlling an operation of the switching elements (102.1-102.4). Additionally, the converter building block comprises a switching-element control interface (108) configured to send an outgoing switching-element control signal (112.1) for controlling switching elements of one or more other converter building blocks and to receive an incoming switching-element control signal (112.2) adapted for controlling the switching elements (102.1-102.4) of the converter circuit (102). Furthermore, the controller unit (106) is selectively operable in a master operation mode (M) and in a slave operation mode (S).

7. 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.

8. 发明公开

EP3790140A1 ELECTRICAL POWER DISTRIBUTION 审中-公开
公开(公告)号：EP3790140A1
公开(公告)日：2021-03-10
申请号：EP20189752.7
申请日：2020-08-06
申请人： Rolls-Royce plc
发明人： Tariq, Mohd , Gajanayake, Chandana , Maswood, Ali , Gupta, Amit
IPC分类号： H02J1/00 , H02J1/10 , H02J7/00 , B64D41/00 , H01F30/00 , H02J7/34
摘要： Electrical power distribution systems 200 and methods of operating electrical power distribution systems 200 are provided. One electrical power distribution system comprises: an electrical power storage unit 201; a transformer 202; a first bidirectional converter circuit 204 connected between the electrical power storage unit 201 and a first winding 203a of the transformer 202; a first DC bus 205; a second DC bus 207; a second bidirectional converter circuit 209 connected between the first DC bus 205 and a second winding 203b of the transformer 202; a third bidirectional converter circuit 210 connected between the second DC bus 207 and a third winding 203c of the transformer 202; and a controller 300 connected for control of the first, second and third converter circuits 204, 209, 210 to distribute electrical power between the electrical power storage unit 201, the first DC bus 205 and the second DC bus 207.

9. 发明公开

EP3715602A1 HEAT EXCHANGER 无效
公开(公告)号：EP3715602A1
公开(公告)日：2020-09-30
申请号：EP20165916.6
申请日：2020-03-26
申请人： Rolls-Royce plc
发明人： Gajanayake, Chandana , Muthu, Vivek , Chatterjee, Pradip , Gupta, Amit
IPC分类号： F02C7/14 , F28D7/00 , F28D7/02 , F28D21/00 , F28F7/02 , F28F13/12
摘要： A two-start helical heat exchanger (100) comprises a helical baffle (102) extending along a length of the heat exchanger and having first and second surfaces, wherein: the first surface of the baffle (102) is arranged to provide a first helical fluid flow path (110) for a first fluid; and the second surface of the baffle (102) is arranged to provide a second helical fluid flow path (112) for a second fluid, wherein the second fluid flow path (112) is arranged in counterflow with the first fluid flow path (110); and a casing (120) within which the baffle (102) is mounted. The baffle (102) is arranged such that first and second fluid flow paths (110, 122) are in thermal contact with each other through the baffle (102), and in thermal contact with the casing (120). The heat exchanger (100) may be incorporated into a power converter, for example to cool the power converter. The heat exchanger (100) may be used on an aircraft.

10. 发明公开

EP3282268A1 A METHOD AND APPARATUS FOR DIAGNOSING A FAULT CONDITION IN AN ELECTRIC MACHINE 审中-公开
标题翻译：一种诊断电机故障状态的方法和装置
公开(公告)号：EP3282268A1
公开(公告)日：2018-02-14
申请号：EP17181633.3
申请日：2017-07-17
申请人： Rolls-Royce plc
发明人： Gajanayake, Chandana , Nadarajan, Sivakumar , Gupta, Amit , Bi, Chao , Aung, Nay Lin Htun , Quan, Jiang
IPC分类号： G01R31/34 , G01R33/12
CPC分类号： G01R31/343 , G01R23/16 , G01R33/09 , G01R33/1215
摘要： There is disclosed a method for diagnosing a fault condition in an electric machine 4, the electric machine 4 comprising a rotor 10 having an axis of rotation 14 and comprising a plurality of permanent magnets M1-M8. The method comprises: rotating the rotor 10 so that each of the plurality of permanent magnets M1-M8 passes a magnetic flux density sensor 6; measuring values of magnetic flux density using the magnetic flux density sensor 6 at a plurality of positions of the rotor 10; analysing the measured values of magnetic flux density and comparing a magnitude of a peak amplitude in a time or frequency domain with a reference value; and if the peak amplitude is below the reference value, determining that the electric machine 4 has a fault condition.
摘要翻译：公开了一种用于诊断电机4中的故障状况的方法，电机4包括具有旋转轴线14并且包括多个永磁体M1-M8的转子10。该方法包括：旋转转子10，使得多个永磁体M1-M8中的每一个通过磁通密度传感器6; 在转子10的多个位置使用磁通密度传感器6测量磁通密度的值; 分析磁通量密度的测量值并将时间或频率域中的峰值幅度与参考值进行比较; 并且如果峰值幅度低于参考值，则确定电机4具有故障状况。

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