公开(公告)号：US11784581B2

公开(公告)日：2023-10-10

申请号：US17644495

申请日：2021-12-15

Applicant: ABB Schweiz AG

Inventor： Federico Bertoldi ,  Kalle Ilves ,  Nan Chen

IPC: H02M7/487 ,  H02M7/483 ,  H02M7/48 ,  H02M7/539

CPC classification number: H02M7/487 ,  H02M7/4815 ,  H02M7/539 ,  H02M7/4835 ,  H02M7/4837

Abstract: A converter and a method of operating a converter. The converter comprising a DC link capacitor, an upper arm (S1) and a lower arm (S4) with switching cells in series, an upper switch (S2) and a lower switch (S3). The upper switch (S2) and the lower switch (S3) are connected together and the connection point forming an output voltage terminal (a). The converter comprising further an upper valve component and a lower valve component, which are arranged such that the upper valve component allows current from the center point of the DC link capacitor towards the upper arm and the lower valve component allows current from the lower arm towards center point of the DC link capacitor. A current path through the upper valve component or the lower valve component comprises inductance to form a resonance circuit.

公开(公告)号：US20220247324A1

公开(公告)日：2022-08-04

申请号：US17644495

申请日：2021-12-15

Applicant: ABB Schweiz AG

Inventor： Federico Bertoldi ,  Kalle Ilves ,  Nan Chen

IPC: H02M7/487 ,  H02M7/539 ,  H02M7/48

Abstract: A converter and a method of operating a converter. The converter comprising a DC link capacitor, an upper arm (S1) and a lower arm (S4) with switching cells in series, an upper switch (S2) and a lower switch (S3). The upper switch (S2) and the lower switch (S3) are connected together and the connection point forming an output voltage terminal (a). The converter comprising further an upper valve component and a lower valve component, which are arranged such that the upper valve component allows current from the center point of the DC link capacitor towards the upper arm and the lower valve component allows current from the lower arm towards center point of the DC link capacitor. A current path through the upper valve component or the lower valve component comprises inductance to form a resonance circuit.

公开(公告)号：US20230213583A1

公开(公告)日：2023-07-06

申请号：US18001096

申请日：2021-06-15

Applicant: ABB Schweiz AG

Inventor： Panagiotis Kakosimos ,  Federico Bertoldi ,  Wenliang Chen ,  Kristian Rönnberg

IPC: G01R31/34 ,  H02P9/00 ,  H02P29/024

CPC classification number: G01R31/343 ,  H02P9/006 ,  H02P29/024

Abstract: A method of monitoring an electrical machine, wherein the method includes: a) obtaining temperature measurement values of the temperature at a plurality of locations of the electrical machine, b) obtaining estimated temperatures at the plurality of locations given by a thermal model of the electrical machine, the thermal model including initial weight parameter values, c) minimizing a difference between the temperature measurement values and the estimated temperatures by finding optimal weight parameter values, d) storing the initial weight parameter values to thereby obtain a storage of used weight parameter values, and updating the optimal weight parameter values as new initial weight parameter values, and repeating steps a)-d) over and over during operation of the electrical machine.