公开(公告)号：EP3709497A1

公开(公告)日：2020-09-16

申请号：EP19162755.3

申请日：2019-03-14

Applicant: ABB Schweiz AG

Inventor： Schweizer, Mario ,  Geyer, Tobias ,  Tsoumas, Ioannis

IPC: H02M7/483 ,  H02M7/49 ,  H02M1/00

Abstract: An electrical converter (10) comprises a main converter (12) for generating a first output voltage ( u 1abc ) and a converter cell (14a) for converting the first output voltage ( u 1abc ) into a second output voltage ( u 2abc ) . A method for operating an electrical converter (10) comprises: receiving a reference voltage ( v * abc ) for the electrical converter (10); pulse width modulating the reference voltage ( v * abc ) with a first modulation frequency for generating a first switching signal ( s 1abc ) for the main converter (12); switching the main converter (12) with the first switching signal ( s 1abc ) to generate the first output voltage ( u 1abc ); estimating the first output voltage ( v 1abc ) from the first switching signal ( s 1abc ); determining a voltage error ( v * 2abc ) by subtracting the estimated first output voltage ( v 1abc ) from the reference voltage ( v * abc ); pulse width modulating the voltage error ( v* 2abc ) with a second modulation frequency, which is higher than the first modulation frequency, for generating a further switching signal ( s 2abc , s 3abc ) for the converter cell (14a); and switching the converter cell (14a) with the further switching signal ( s 2abc , s 3abc ) to generate the second output voltage ( u 2abc ).

公开(公告)号：EP3872975A1

公开(公告)日：2021-09-01

申请号：EP20159794.5

申请日：2020-02-27

Applicant: ABB Schweiz AG

Inventor： Park, Ki-Bum ,  Schweizer, Mario ,  Pettersson, Sami

IPC: H02M7/483 ,  H02M7/487 ,  H02M1/32 ,  H02M1/36 ,  H02M1/00

Abstract: A flying capacitor multilevel converter having active neutral-point-clamped topology with an output LCL-filter, wherein the converter comprises an overcurrent mode controller. The overcurrent mode controller is adapted to receive a converter current reference and measured converter current, to form an overcurrent band having an upper and a lower value, the upper value being higher than the converter current reference and the lower value being lower than the converter current reference, and to block gate control signals when the measured converter current is positive and higher than the upper value or when the measured converter current is negative and lower than the lower value.

公开(公告)号：EP3787166A1

公开(公告)日：2021-03-03

申请号：EP19194929.6

申请日：2019-09-02

Applicant: ABB Schweiz AG

Inventor： Pettersson, Sami ,  Schweizer, Mario ,  Park, Ki-Bum ,  Canales, Francisco

IPC: H02M1/32 ,  H02M7/487 ,  H02M7/483 ,  H02M1/00

Abstract: A protection circuit for a power converter with cascaded bipolar and/or unipolar semiconductors is provided.
The protection circuit comprises at least one comparator circuit which is adapted to monitor a voltage characteristic on a collector-emitter path of at least one semiconductor which is arranged in a polarity selection stage of the power converter and/or to monitor a voltage characteristic on at least one capacitor, which is arranged in the power converter.
The at least one comparator circuit is further adapted to output an electrical signal, representing the voltage characteristic of the semiconductor and/or the at least one capacitor to at least one evaluation unit. The at least one evaluation unit is further adapted to evaluate the result from the at least one comparator circuit and to deactivate the semiconductors in case that the voltage characteristic of the semiconductors and/or the capacitors deviate from a predetermined threshold.

公开(公告)号：EP3876409A1

公开(公告)日：2021-09-08

申请号：EP20161242.1

申请日：2020-03-05

Applicant: ABB Schweiz AG

Inventor： Christen, Daniel ,  Schweizer, Mario ,  Bishnoi, Hemant ,  Pettersson, Sami

IPC: H02M7/00 ,  H02M7/483 ,  H02M1/088 ,  H02M7/493

Abstract: The invention relates to a flying capacitor switching cell-system (1), comprising at least two flying capacitor switching cells (2), wherein each of the cells (2) comprises an arrangement of at least one semiconductor system, wherein the cells (2) are in parallel in an electrical circuit (3).
The invention also relates to a converter system comprising the flying capacitor switching cell-system (1).

公开(公告)号：EP2887526B1

公开(公告)日：2019-04-03

申请号：EP13198286.0

申请日：2013-12-19

Applicant: ABB Schweiz AG

Inventor： Schweizer, Mario ,  Grindberg, Roman

IPC: H02M7/00