公开(公告)号：US20230133771A1

公开(公告)日：2023-05-04

申请号：US17968254

申请日：2022-10-18

Applicant: ROLLS-ROYCE plc

Inventor： David R. TRAINER ,  Francisco Javier CHIVITE ZABALZA ,  Mark SWEET

IPC: B60L15/00 ,  H02M3/158 ,  H02M5/458

Abstract: The disclosure relates to electrical converters for use in aircraft electrical power systems and to methods of operating such electrical converters to maintain reliable operation of semiconductor components over varying cosmic radiation levels at altitude. Exemplary embodiments include an electrical converter comprising: a converter circuit having a plurality of semiconductor devices configured to convert an input electrical supply to an output electrical supply; and a controller connected configured to receive an input altitude signal, wherein the controller is further configured to control a temperature of the plurality of semiconductor devices according to the received input altitude signal to reduce an effect of increased incident cosmic radiation on the converter circuit.

公开(公告)号：US20210126567A1

公开(公告)日：2021-04-29

申请号：US17061140

申请日：2020-10-01

Applicant: ROLLS-ROYCE plc

Inventor： Mark SWEET ,  David F BROOKES

IPC: H02P9/42 ,  F02C7/06 ,  F02C6/00 ,  H02P101/25 ,  H02P103/20

Abstract: A turboelectric generator system includes a gas turbine engine which includes, in fluid flow series, a gas-generator compressor, a combustor, a gas-generator turbine, and a variable-speed free power turbine. The system further comprises a variable-frequency electric machine rotatably connected with the free power turbine and a power converter configured to convert a variable frequency electrical output from the electric machine to a fixed frequency output.