公开(公告)号：US20240280420A1

公开(公告)日：2024-08-22

申请号：US18424999

申请日：2024-01-29

Applicant: ROLLS-ROYCE plc

Inventor： David R. TRAINER ,  Peter J. COX-SMITH ,  Jonathan C. NICHOLLS ,  Mark SWEET

IPC: G01K15/00 ,  G01K7/00 ,  G01R15/18

CPC classification number: G01K15/005 ,  G01K7/00 ,  G01R15/181

Abstract: An estimation of junction temperatures of transistors in power electronics converter. Example embodiments include method of calibrating electrical power system, electrical power system including: power electronics converter configured to convert between first and second voltage supplies, converter having plurality of semiconductor switches; controller configured to provide switching signals to each semiconductor switch; current sensor arranged to measure current through converter to one of first and second voltage supplies; temperature sensor arranged to measure temperature of one or more semiconductor switches; and junction temperature measurement module configured to receive current signal and temperature signal, method including: controller providing gate switching signal to transistor; junction temperature measurement module measuring threshold voltage of transistor from current signal and temperature of transistor from temperature sensor during switching period of transistor; and junction temperature measurement module updating stored calibration defining relationship between rate of change of current and estimated junction temperature of transistor.