公开(公告)号：US20240280414A1

公开(公告)日：2024-08-22

申请号：US18425008

申请日：2024-01-29

Applicant: ROLLS-ROYCE plc

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

IPC: G01K7/01 ,  H02M1/32 ,  F01D21/00

CPC classification number: G01K7/01 ,  H02M1/327 ,  F01D21/003 ,  F05D2220/323 ,  G01K2217/00

Abstract: The disclosure relates to estimation of junction temperatures of transistors in a power electronics converter. Example embodiments include a method of estimating a junction temperature of a transistor in a power electronics converter configured to convert between first and second supply voltages, the method comprising: providing a gate switching signal to the transistor; measuring a rate of change of current through the converter during a switching period of the transistor; and outputting an estimated junction temperature of the transistor based on the measured rate of change of current, wherein the rate of change of current is measured while a gate voltage of the transistor is above a gate threshold voltage and a drain-source voltage across the transistor is above a predetermined fraction of the first or second supply voltage whereby the rate of change of current is measured in a linear region.