MEDIUM-FREQUENCY TRANSFORMER-BASED DOUBLE-ISOLATED AUXILIARY SUPPLY FOR MEDIUM-VOLTAGE DC/DC CONVERTERS

    公开(公告)号:US20250096691A1

    公开(公告)日:2025-03-20

    申请号:US18888641

    申请日:2024-09-18

    Abstract: A converter for transferring power from a medium-voltage, MV, to a low-voltage, LV, side is provided. The converter includes at least one DC/AC cell with a MV AC terminal configured for generating an AC voltage from a MV DC voltage, and includes at least one AC/DC cell with a LV AC terminal configured for generating a DC voltage from a LV AC voltage. The converter has a magnetic core with a LV winding, and a LV terminal connected to the LV AC terminal, additionally with a magnetic core with a MV winding, and a MV terminal connected to the MV AC terminal. The converter includes an auxiliary unit with an auxiliary winding, and an auxiliary terminal connected to control circuits for operating the MV DC/AC cell. Galvanic insulation between the LV and the MV winding and the auxiliary winding is configured to withstand the Basic Insulation Level of the converter.

    Charging station with high frequency distribution network

    公开(公告)号:US12255461B2

    公开(公告)日:2025-03-18

    申请号:US17366488

    申请日:2021-07-02

    Abstract: A charging station for electric vehicles includes a central part for converting a grid AC voltage from an electrical grid into a high frequency AC voltage; a distribution network for distributing the high frequency AC voltage; and a plurality of coils directly connected to the distribution network, wherein each coil is adapted for transferring energy to an electrical vehicle.

    Bi-directional line-interphase transformer-based converter

    公开(公告)号:US11949348B2

    公开(公告)日:2024-04-02

    申请号:US17884008

    申请日:2022-08-09

    CPC classification number: H02M7/797 H02M7/493 H02M7/757 H01F30/12 H02J3/381

    Abstract: A multi-pulse line-interphase transformer converter includes an electric part that includes magnetic components configured to be connected to a three-phase AC grid, and an electric part that includes a multi-phase voltage system configured to be connected to a common DC capacitor. The electric part splits each AC grid phase n times into two phases, resulting in a plurality of intermediate phases at an internal interface, each intermediate phase corresponding to a pulse of the multi-pulse line-interphase transformer converter. The intermediate phases are connected to the multi-phase voltage system. The multi-phase voltage system comprises bridges with actively controlled switches. The bridges are connected in parallel to the common DC capacitor.

    Bi-Directional Line-Interphase Transformer-Based Converter

    公开(公告)号:US20230049615A1

    公开(公告)日:2023-02-16

    申请号:US17884008

    申请日:2022-08-09

    Abstract: A multi-pulse line-interphase transformer converter includes an electric part that includes magnetic components configured to be connected to a three-phase AC grid, and an electric part that includes a multi-phase voltage system configured to be connected to a common DC capacitor. The electric part splits each AC grid phase n times into two phases, resulting in a plurality of intermediate phases at an internal interface, each intermediate phase corresponding to a pulse of the multi-pulse line-interphase transformer converter. The intermediate phases are connected to the multi-phase voltage system. The multi-phase voltage system comprises bridges with actively controlled switches. The bridges are connected in parallel to the common DC capacitor.

    Bi-Directional Medium Voltage to Low Voltage Converter Topology

    公开(公告)号:US20230048596A1

    公开(公告)日:2023-02-16

    申请号:US17884723

    申请日:2022-08-10

    Applicant: ABB Schweiz AG

    Abstract: A bi-directional medium voltage converter topology includes an n-pulse line-interphase-transformer, LIT; a plurality of bi-directional medium voltage, MV converters connected to the LIT on an AC side thereof and connected in parallel on a DC side thereof; a bi-directional multi-stage DC/DC converter connected to the plurality of bi-directional MV converters; and a bi-directional low voltage, LV, DC/DC converter; wherein the multi-stage DC/DC converter and the LV DC/DC converter are connected to each other galvanically insulated.

    Current balancing in power semiconductors of a DC/DC converter

    公开(公告)号:US12149178B2

    公开(公告)日:2024-11-19

    申请号:US17753961

    申请日:2020-09-18

    Applicant: ABB Schweiz AG

    Abstract: A DC/DC converter which includes a first DC link, the first DC link can be a first DC link capacitor; a first plurality of N>1 converter bridges connected in parallel to the first DC link; and a transformer, the transformer can be a medium frequency transformer. The transformer includes a primary side and a secondary side, the primary side including at least one primary winding. The converter further includes a first plurality of N impedance elements, for each converter bridge, a respective impedance element of the first plurality of impedance elements is connected between the converter bridge and the at least one primary winding.

    Bidirectional DC-DC converter and control method therefor

    公开(公告)号:US10396676B2

    公开(公告)日:2019-08-27

    申请号:US16132591

    申请日:2018-09-17

    Applicant: ABB Schweiz AG

    Abstract: The invention relates to a bidirectional DC-DC converter with intermediate conversion into AC power, including: a DC-AC conversion circuit using a plurality of MOSFETs; an AC-DC conversion circuit using a plurality of power diodes; a transformer; a pair of switches, one of which being inserted in series between a DC terminal of the DC-AC conversion circuit and the AC-DC conversion circuit and the other of which being inserted in series between another DC terminal of the DC-AC conversion circuit and the AC-DC conversion circuit; and a controller being adapted for turning on the pair of switches such that the plurality of power diodes of the AC-DC conversion circuit are reverse-biased where the AC power is transferred in the forward direction and turning off the pair of switches where the AC power is transferred in the backward direction.

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