公开(公告)号：EP4362256A1

公开(公告)日：2024-05-01

申请号：EP22204393.7

申请日：2022-10-28

Applicant: HS Elektronik Systeme GmbH

Inventor： GIETZOLD, Thomas ,  KLUGER, Gerd ,  GREITHER, Markus ,  SWENSON, Joshua C. ,  YANG, Nhia ,  COONEY, Robert C. ,  BELISLE, Francis ,  SHEPARD, Charles

IPC: H02H5/04 ,  H02H7/00 ,  H03K17/08

CPC classification number: H02H5/041 ,  H02H7/008 ,  H03K2017/080620130101 ,  H03K17/0822 ,  H03K2217/002720130101

Abstract: A method of monitoring the temperature of a solid state switch (4) in an aircraft solid state power controller (2), comprises the steps of: measuring an electric current (I) flowing through the solid state switch (4); calculating, based on the measured electric current (I), an introduced electric power (Pel) that is introduced into the solid state switch (4) within the predefined time period (Δt); calculating an increase in temperature (ΔT) of the solid state switch (4) that is caused by the introduced electric power (Pel); calculating an actual temperature (Tact) of the solid state switch (4) by adding the calculated increase in temperature (ΔT) to an ambient temperature (Tamb); and comparing the calculated actual temperature (Tact) with a predefined temperature threshold (Tth) and determining an overheat condition if the calculated actual temperature (Tact) exceeds the predefined temperature threshold (Tth).