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公开(公告)号：US11563370B2
公开(公告)日：2023-01-24
申请号：US17009135
申请日：2020-09-01
Applicant: ABB Schweiz AG
Inventor： Sami Pettersson , Mario Schweizer , Ki-Bum Park , Francisco Canales
Abstract: A protection circuit for a power converter with cascaded bipolar and/or unipolar semiconductors is provided. The protection circuit includes 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.
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Patent Agency Ranking
公开(公告)号：US20240142501A1
公开(公告)日：2024-05-02
申请号：US18495262
申请日：2023-10-26
Applicant: ABB Schweiz AG
Inventor： Sami Pettersson
IPC: G01R19/165 , G01R31/40 , H02H7/12
CPC classification number: G01R19/16571 , G01R31/40 , H02H7/1213
Abstract: A flying capacitor converter comprises a converter input comprising a positive pole and a negative pole, an output terminal, and a plurality of cells, each cell comprising two switches and a flying capacitor arranged between each cell. A method for detecting a plurality of faults in the converter includes measuring, by a second current sensor arranged at the positive pole, a second current; measuring by a third current sensor arranged at the negative pole, a third current; and detecting a first fault in the flying capacitor converter when the second current or the third current exceeds a first current threshold, and/or when a gradient of the second current or a gradient of the third current exceeds a first gradient threshold.
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公开(公告)号：US20210119442A1
公开(公告)日：2021-04-22
申请号：US17009135
申请日：2020-09-01
Applicant: ABB Schweiz AG
Inventor： Sami Pettersson , Mario Schweizer , Ki-Bum Park , Francisco Canales
Abstract: A protection circuit for a power converter with cascaded bipolar and/or unipolar semiconductors is provided. The protection circuit includes 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.
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公开(公告)号：US20240364211A1
公开(公告)日：2024-10-31
申请号：US18643393
申请日：2024-04-23
Applicant: ABB Schweiz AG
Inventor： Hemant Bishnoi , Sami Pettersson , Francisco Canales
CPC classification number: H02M1/325 , H02M1/0009 , H02M1/0095 , H02M3/07
Abstract: A flying capacitor converter comprising a protection circuit includes at least two cells, each having a capacitor having a first and second DC sides, a first switch connected to the first DC side and to a capacitor of a following cell or an output circuit, and a second switch 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, only one of the first and second switches is in a conducting state, and during a fault operation where the first switch has a short circuit failure and the second switch has a conducting state, the protection circuit is configured to keep the second switch switched-on.
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5.发明申请公开(公告)号：US20230083355A1
公开(公告)日：2023-03-16
申请号：US17943693
申请日：2022-09-13
Applicant: ABB Schweiz AG
Inventor： Hemant Bishnoi , Sami Pettersson , Mario Schweizer , Daniel Christen , Gernot Riedel
Abstract: A system and method for compensating a faulty switch in a multi-level flying capacitor converter includes a converter capacitor arranged in parallel to an input, a first and second converter switches arranged respectively between first and second ends of the converter capacitor, first and second bypass switches respectively arranged in parallel to the first and second converter switches, wherein operation includes detecting a faulty converter level that includes at least one of the first and second converter switches, discharging all capacitors arranged in parallel to the input of the multi-level converter, wherein all capacitors comprise the converter capacitors and an input capacitor; closing the first and second bypass switches of the faulty converter level; adapting a modulation of the converter switches of the other converter levels; and restarting the multi-level converter.
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公开(公告)号：US20220416686A1
公开(公告)日：2022-12-29
申请号：US17902865
申请日：2022-09-04
Applicant: ABB Schweiz AG
Inventor： Daniel Christen , Mario Schweizer , Hemant Bishnoi , Sami Pettersson
Abstract: A flying capacitor switching cell-system includes at least two flying capacitor switching cells, wherein each of the cells comprises an arrangement of at least one semiconductor system, and wherein the cells are in parallel in an electrical circuit.
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