US 11,853,046 B2
Prediction of faulty behaviour of a converter based on temperature estimation with machine learning algorithm
Olli Alkkiomáki, Helsinki (FI); Joni Siimesjärvi, Helsinki (FI); and Ville Särkimäki, Helsinki (FI)
Assigned to ABB Schweiz AG, Baden (CH)
Appl. No. 17/772,553
Filed by ABB Schweiz AG, Baden (CH)
PCT Filed Oct. 15, 2020, PCT No. PCT/EP2020/079129
§ 371(c)(1), (2) Date Apr. 28, 2022,
PCT Pub. No. WO2021/089298, PCT Pub. Date May 14, 2021.
Claims priority of application No. 19207584 (EP), filed on Nov. 7, 2019.
Prior Publication US 2022/0382269 A1, Dec. 1, 2022
Int. Cl. G05B 23/02 (2006.01)
CPC G05B 23/0229 (2013.01) [G05B 23/024 (2013.01); G05B 23/0283 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for predicting a faulty behaviour of an electrical converter, the method comprising:
receiving an operation point indicator (I) of the electrical converter indicative of an actual operation point of the electrical converter, wherein the electrical converter is connected to a rotating electrical machine to drive the rotating electrical machine, and wherein the operation point indicator (I) comprises at least one of: a torque of the rotating electrical machine and a rotational speed of the rotating electrical machine;
receiving a measured device temperature (Td) of a power semiconductor device of the electrical converter indicative of an actual temperature of the power semiconductor device;
inputting the operation point indicator (I) as input data into a machine learning algorithm trained with historical data comprising operation point indicators and associated device temperatures, wherein the historical data was recorded during normal operation of a power semiconductor device;
estimating an estimated device temperature (Td*) with the machine learning algorithm, wherein the estimated device temperature (Td*) represents a device temperature during a normal operation; and
predicting the faulty behaviour (F) by comparing the estimated device temperature (Td*) with the measured device temperature (Td).