公开(公告)号：WO2021175575A1

公开(公告)日：2021-09-10

申请号：PCT/EP2021/053647

申请日：2021-02-15

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：EP4456395A1

公开(公告)日：2024-10-30

申请号：EP23169996.8

申请日：2023-04-26

Applicant: ABB SCHWEIZ AG

Inventor： BISHNOI, Hemant ,  PETTERSSON, Sami ,  CANALES, Francisco

IPC: H02M1/00 ,  H02M1/08 ,  H02M1/32 ,  H02M7/483 ,  H02M7/487

Abstract: The invention relates to a flying capacitor converter (100) comprising a protection circuit (170) for protecting the flying capacitor converter (100) from a short-circuit failure of a switch. The flying capacitor converter (100) comprises at least two cells. Each cell comprises a capacitor having a first DC side and a second DC side, a first switch (122, 132) connected to the first DC side and to a capacitor of a following cell or an output circuit, and a second switch (124, 134) connected to the second DC side and to the capacitor of the following cell or the output circuit. During a nominal non-fault operation of the flying capacitor converter (100), only one of the first switch (122, 132) and the second switch (124, 134) is in a conducting state, and during a fault operation where the first switch (122, 132) has a short-circuit failure and the second switch (124, 134) has a conducting state, the protection circuit (170) is configured to keep the second switch (124, 134) switched-on.

公开(公告)号：EP4057493A1

公开(公告)日：2022-09-14

申请号：EP21161529.9

申请日：2021-03-09

Applicant: ABB Schweiz AG

Inventor： SCHWEIZER, Mario ,  CHRISTEN, Daniel ,  BISHNOI, Hemant

IPC: H02M7/483 ,  H02M7/5395 ,  H02M1/00 ,  H02M1/12

Abstract: The invention relates to an N-level converter (100). The converter is configured to generate an output voltage out of N output voltage levels. The N level converter comprises a switching circuit (104) with a number of switches, and a control circuit (102). The control circuit is configured to generate a reference signal. The reference signal has N voltage levels, wherein adjacent reference signal voltage levels define reference signal voltage sub-ranges and wherein all reference signal voltage sub-ranges form a reference signal voltage full-range. The control circuit is further configured to generate M carriers. Each of the M carriers covers the reference signal voltage full-range. The control circuit is further configured to compare a number of carriers out of the M carriers with the references signal, to generate a PWM pulse for each of the compared carriers based on the comparison, and to control a converter switch arrangement out of the number of switches using the PWM pulses for generating a voltage contributing to an converter output voltage level to be generated. The M carriers are divided into L carrier sets. Each carrier set includes the carriers to be compared.