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。

公开(公告)号：US20240217353A1

公开(公告)日：2024-07-04

申请号：US18536570

申请日：2023-12-12

Applicant: ROLLS-ROYCE plc

Inventor： Sivakumar NADARAJAN ,  Shanjiao JIANG ,  Thiha KYAW ,  Amit GUPTA

IPC: B60L53/14 ,  H02J7/00 ,  H02J13/00

CPC classification number: B60L53/14 ,  H02J7/00032 ,  H02J7/0047 ,  H02J13/00022 ,  B60L2200/10

Abstract: A data logging and transmission device is provided for an electric aircraft having a charging port for on-ground charging of an energy storage system of an electric propulsion system of the aircraft. The device includes: a control unit, data storage unit, data transmitter, and sensor configured to detect connection of charging port of the electric aircraft to ground-side charger and then issue a trigger signal to the control unit. The control unit is configured wherein a state of flight of the electric aircraft, the control unit collects inflight data from the electric aircraft and saves the inflight data to the data storage unit. The control unit is also configured such that in a state of on-ground charging of the electric aircraft, the control unit, on receipt of the trigger signal, commands the data transmitter to transmit the inflight data saved on the data storage unit to a remote receiver.

公开(公告)号：US20180095134A1

公开(公告)日：2018-04-05

申请号：US15702182

申请日：2017-09-12

Applicant: ROLLS-ROYCE plc

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

IPC: G01R31/34 ,  G06F17/30 ,  H02P9/10

CPC classification number: G01R31/346 ,  F02C3/04 ,  G01R31/343 ,  G06F16/285 ,  H02P9/107 ,  H02P29/0243 ,  H02P2101/25 ,  H02P2103/20

Abstract: A method of classifying a stator winding fault in a brushless synchronous generator includes measuring an electrical parameter of the stator winding and classifying the fault by calculating positive or negative sequence harmonics of the parameter and comparing one or more harmonic component to a threshold.