公开(公告)号：US11248966B2

公开(公告)日：2022-02-15

申请号：US16437371

申请日：2019-06-11

Applicant: ROLLS-ROYCE plc

Inventor： Mohamed H. M. Sathik ,  Rejeki Simanjorang ,  Chandana J. Gajanayake ,  Sundararajan Prasanth ,  Amit K. Gupta

IPC: G01K7/00 ,  G01K3/00 ,  G01K1/00 ,  G01K7/16 ,  H02P29/60 ,  G01K7/01 ,  H02P29/024

Abstract: A system, method and machine-readable instructions for monitoring a power electronics device. The system involves a semiconductor device, at least one sensor and a processor. The processor is configured to monitor a junction temperature of the semiconductor device by determining from the at least one sensor an on-state resistance of the semiconductor device and calculating the junction temperature of the semiconductor device according to a relationship between the on-state resistance of the semiconductor device and the junction temperature of the semiconductor device. The processor may apply an ageing coefficient to the on-state resistance.

公开(公告)号：US11287465B2

公开(公告)日：2022-03-29

申请号：US16750235

申请日：2020-01-23

Applicant: ROLLS-ROYCE plc

Inventor： Mohamed Sathik Mohamed Halick ,  Chandana J Gajanayake ,  Sundararajan Prasanth ,  Rejeki Simanjorang ,  Amit K Gupta

IPC: G01R31/26 ,  G01D3/08 ,  G01R31/42 ,  G01R31/27 ,  H02M1/00 ,  H03K17/082 ,  H03K17/689 ,  H03K17/78

Abstract: An operating condition monitor (100) for monitoring an operating condition of a transistor-based power converter (102), comprising: a sensing apparatus (106) configured to measure a turn-off transient energy of the power converter (102), a processor (108) in communication with the sensing apparatus (106) to receive the measurement of the turn-off transient energy, the processor being configured to: compare the measurement of the turn-off transient energy to a threshold; and issue an event signal based on the comparison to the threshold meeting a comparison criterion. A method (200, 200′) of monitoring an operating state of a transistor-based power converter is also disclosed.