公开(公告)号：US20230123533A1

公开(公告)日：2023-04-20

申请号：US17950445

申请日：2022-09-22

Applicant: ROLLS-ROYCE plc

Inventor： Francisco Javier CHIVITE ZABALZA ,  David R TRAINER ,  Mark SWEET ,  Matthew C MORRIS ,  Zafer JARRAH ,  James A CAMPBELL

IPC: F02C6/00 ,  H02J3/02 ,  H02M5/458 ,  H02M7/219 ,  H02M1/00 ,  H02J3/01 ,  H02J3/00 ,  B64D27/10 ,  B64D27/24

Abstract: A electrical power system comprises: an electrical machine operable to output AC; a DC electrical network; a power electronics converter connected between the AC output of the electrical machine and the DC electrical network and including a plurality of transistors and associated diodes connected in parallel with the transistors; and a controller configured to control switching of the transistors of the converter so that, during normal operation of the electrical power system, the converter rectifies the AC output of the electrical machine to supply the DC electrical network with DC electrical power. The controller is further configured, responsive to a determination to the effect there is a fault in the DC electrical network, to control a voltage source, to inject a voltage to bias the diodes of the converter, and to control the switching of the transistors to control a level of current supplied to the faulted DC electrical network.