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    INVERTER CONTROL METHOD
    11.
    发明申请
    INVERTER CONTROL METHOD 审中-公开
    逆变器控制方法

    公开(公告)号：US20160315558A1

    公开(公告)日：2016-10-27

    申请号：US15092372

    申请日：2016-04-06

    Applicant: ROLLS-ROYCE plc

    Inventor： Meng Yeong LEE ,  Chandana Jayamapathi GAJANAYAKE ,  Shantha Dharmasiri Gamini JAYASINGHE ,  Sivakumar NADARAJAN ,  Amit Kumar GUPTA

    IPC: H02M7/537

    CPC classification number: H02M7/537 ,  H02M1/32 ,  H02M7/5387 ,  H02M7/5395 ,  H02M2001/327

    Abstract: A method of controlling an inverter, in which the inverter includes a single-phase inverter arrangement comprising a complementary pair of power switches, comprises the steps of:controlling the complementary pair of power switches with a modulating signal to output an AC signal;judging which of the power switches in the complementary pair of power switches is at a higher temperature;determining the magnitude and sign of a DC offset signal to apply to the modulating signal to reduce the total current in the power switch judged to be at the higher temperature; andapplying the DC offset signal to the modulating signal.

    Abstract translation: 将DC偏移信号应用于调制信号。

    FAULT DETECTION AND DIAGNOSIS IN AN INDUCTION MOTOR
    12.
    发明申请
    FAULT DETECTION AND DIAGNOSIS IN AN INDUCTION MOTOR 审中-公开
    感应电动机故障检测与诊断

    公开(公告)号：US20160266208A1

    公开(公告)日：2016-09-15

    申请号：US15050718

    申请日：2016-02-23

    Applicant: ROLLS-ROYCE plc

    Inventor： Subash Chandar ATHIKESSAVAN ,  Sivakumar NADARAJAN ,  Amit Kumar GUPTA ,  Sanjib Kumar PANDA ,  Chandana Jayampathi GAJANAYAKE

    IPC: G01R31/34

    CPC classification number: G01R31/346 ,  H02P29/0241

    Abstract: A method of detecting rotor and/or stator side faults in an induction motor. Signals indicative of three-phase stator currents of the induction motor are acquired (10) and converted (16) into three-phase current phasors. The three-phase current phasors are combined (16) to obtain a quantity having a DC component and an AC component. A frequency spectrum of the AC component is obtained (18) and compared (20,22) to a frequency spectrum of the AC component under healthy operating conditions in order to determine the presence of a rotor and/or stator side fault in the induction motor

    Abstract translation: 检测感应电动机中转子和/或定子侧故障的方法。 获取表示感应电动机的三相定子电流的信号（10）并将其转换为三相电流相量。 组合三相电流相量（16）以获得具有DC分量和AC分量的量。 获得交流分量的频谱（18）并比较（20,22）到健康运行条件下交流分量的频谱，以便确定感应电机中转子和/或定子侧故障的存在

    Asset Condition Monitoring
    13.
    发明申请
    Asset Condition Monitoring 审中-公开
    资产状况监测

    公开(公告)号：US20150346066A1

    公开(公告)日：2015-12-03

    申请号：US14711169

    申请日：2015-05-13

    Applicant: ROLLS-ROYCE plc

    Inventor： Partha DUTTA ,  Goh CHI-KEONG ,  Sivakumar NADARAJAN ,  Feng YANG ,  Zhao XU ,  Shyh-Hao KUO

    IPC: G01M99/00

    CPC classification number: G01M99/008 ,  G05B23/0221

    Abstract: Invention concerns a machine fault diagnostic system. Sensors are provided for sensing an operational parameter of the machine over time in use and outputting corresponding sensor signals. A machine operation diagnosis tool is arranged to receive the sensor signals and has a data store for operational parameter data indicative of a normal mode of machine operation and operational parameter data indicative of one or more known machine faults. The diagnosis tool has one or more processor arranged to compare the received sensor signals with the operational parameter data in the data store in order to determine a match with either the normal mode of operation or the one or more known machine fault, and wherein the processor sentences an unknown fault in the event that said match is not established. The system may record unknown faults and update the diagnosis tool as unknown faults become recognizable faults.

    Abstract translation: 本发明涉及一种机器故障诊断系统。 提供传感器用于在使用中感测机器的操作参数并输出相应的传感器信号。 机器操作诊断工具被布置成接收传感器信号，并且具有用于指示机器操作的正常模式的操作参数数据的数据存储和指示一个或多个已知机器故障的操作参数数据。 诊断工具具有一个或多个处理器，其布置成将接收的传感器信号与数据存储器中的操作参数数据进行比较，以便确定与正常操作模式或一个或多个已知机器故障的匹配，并且其中处理器 在所述匹配未建立的情况下判断未知故障。 系统可能记录未知故障，并更新诊断工具，因为未知故障成为可识别的故障。

    FAULT DETECTION IN BRUSHLESS EXCITERS
    14.
    发明申请
    FAULT DETECTION IN BRUSHLESS EXCITERS 有权
    无毛皮检查中的故障检测

    公开(公告)号：US20150198668A1

    公开(公告)日：2015-07-16

    申请号：US14573573

    申请日：2014-12-17

    Applicant: ROLLS-ROYCE PLC

    Inventor： Vaiyapuri VISWANATHAN ,  Chandana GAJANAYAKE ,  Amit GUPTA ,  Sivakumar NADARAJAN

    IPC: G01R31/34

    CPC classification number: G01R31/343 ,  H02H7/065 ,  H02P9/00 ,  H02P9/102 ,  H02P11/00

    Abstract: 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.

    Abstract translation: 一种用于检测适用于无刷发电机的励磁电路中的故障的方法，所述励磁电路包括（a）具有多个电枢的励磁机电枢绕组，所述多个电枢布置成产生多相交流信号，所述多个电枢 提供多相AC信号的相应子信号分量的电枢，以及（b）用于经由相应电枢接收子信号的整流电路，整流电路包括多个组件，其被布置成整流子信号以提供 整流输出信号，其中所述方法包括以下步骤：获取相应子信号中的至少两个中的每一个的第一特性的相应运算子值; 导出指示所获取的各个操作子值之间的关系的操作值; 基于导出的操作值来确定励磁电路中是否发生故障。

    THERMAL CONTROLLER
    15.
    发明申请
    THERMAL CONTROLLER 有权
    热控制器

    公开(公告)号：US20140225659A1

    公开(公告)日：2014-08-14

    申请号：US14167088

    申请日：2014-01-29

    Applicant: ROLLS-ROYCE PLC

    Inventor： Bikramjit BHANGU ,  Mohamed Halick Mohamed SATHIK ,  Sivakumar NADARAJAN ,  Chandana Jayampathi GAJANAYAKE

    IPC: H03K17/14

    CPC classification number: H03K17/145 ,  H01L2924/0002 ,  H01L2924/00

    Abstract: A thermal controller for driving a gate control unit of a gate-driven semiconductor switching device, the thermal controller comprising a junction temperature estimation module for generating an estimated junction temperature for the switching device, a gate voltage control module for modifying a gate voltage of the switching device, a switching frequency control module for modifying a switching frequency of the switching device, and a duty cycle control module for modifying the duty cycle of the switching device. In use, the thermal controller is adapted to activate one of the gate voltage control module, switching frequency control module and duty cycle control module dependent upon the estimated junction temperature in order to maintain the actual junction temperature below a pre-determined limit.

    Abstract translation: 一种用于驱动栅极驱动半导体开关器件的栅极控制单元的热控制器，所述热控制器包括用于产生所述开关器件的估计结温的结温估计模块，用于修改所述栅极电压的栅极电压的栅极电压控制模块 开关装置，用于修改开关装置的开关频率的开关频率控制模块，以及用于修改开关装置的占空比的占空比控制模块。 在使用中，热控制器适于根据估计的结温激活门电压控制模块，开关频率控制模块和占空比控制模块中的一个，以便将实际结温保持在预定极限以下。

    METHODS, SYSTEMS, BATTERY, CHARGING STATION
    16.
    发明申请
    METHODS, SYSTEMS, BATTERY, CHARGING STATION 有权

    公开(公告)号：US20250058669A1

    公开(公告)日：2025-02-20

    申请号：US18778519

    申请日：2024-07-19

    Applicant: ROLLS-ROYCE PLC ,  ROLLS-ROYCE DEUTSCHLAND LTD & CO KG

    Inventor： Sivakumar NADARAJAN ,  Philipp SCHILDT

    IPC: B60L53/66 ,  B60L53/65 ,  B60L53/68 ,  B60L53/80 ,  B64D27/357 ,  B64F1/35

    Abstract: A method for gathering inflight data during operation of an electric or hybrid-electric aircraft. The aircraft includes: a swappable battery pack, connected to an electrical system of the aircraft, the swappable battery pack including a data storage module accessible via a data interface of the swappable battery pack; and a control unit, connected to the swappable battery pack via the data interface. The method includes, while the aircraft is in flight, gathering, by the control unit, the inflight data from the aircraft and saving the gathered inflight data to the data storage module of the swappable battery pack.

    DATA LOGGING DEVICE FOR AN ELECTRIC AIRCRAFT
    17.
    发明公开
    DATA LOGGING DEVICE FOR AN ELECTRIC AIRCRAFT 审中-公开

    公开(公告)号：US20240217378A1

    公开(公告)日：2024-07-04

    申请号：US18536514

    申请日：2023-12-12

    Applicant: ROLLS-ROYCE plc

    Inventor： Sivakumar NADARAJAN ,  Viswanathan VAIYAPURI ,  Amit K. GUPTA

    IPC: B60L53/66 ,  G08G5/00

    CPC classification number: B60L53/66 ,  G08G5/0013

    Abstract: A data logging device for an electric aircraft having charging port for on-ground charging of energy storage system of electric propulsion system of aircraft. Device includes an aircraft-side data storage unit, data interface, trigger signal interface, and control unit. Control unit is configured to detect connection of charging port to ground-side charger based on trigger signal received by control unit from ground-side charger via trigger signal interface. Control unit is configured wherein a state of flight of electric aircraft, control unit collects inflight data from electric aircraft via data interface and saves inflight data to aircraft-side data storage unit. Control unit is also configured wherein a state of on-ground charging of electric aircraft, control unit, on receipt of trigger signal, sends inflight data saved on aircraft-side data storage unit via data interface to charger for forwarding to at least one of a data transmitter and a ground-side data storage unit.

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