US 11,949,348 B2
Bi-directional line-interphase transformer-based converter
Uwe Drofenik, Zürich (CH); Francisco Canales, Baden-Dättwil (CH); and Daniel Rothmund, Mülligen (CH)
Assigned to ABB E-mobility B.V., Delft (NL)
Filed by ABB E-mobility B.V., Delft (NL)
Filed on Aug. 9, 2022, as Appl. No. 17/884,008.
Claims priority of application No. 21191279 (EP), filed on Aug. 13, 2021.
Prior Publication US 2023/0049615 A1, Feb. 16, 2023
Int. Cl. H02M 7/797 (2006.01); H02M 7/493 (2007.01); H02M 7/757 (2006.01); H01F 30/12 (2006.01); H02J 3/38 (2006.01)
CPC H02M 7/797 (2013.01) [H02M 7/493 (2013.01); H02M 7/757 (2013.01); H01F 30/12 (2013.01); H02J 3/381 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A multi-pulse line-interphase transformer converter comprising:
a magnetic part including magnetic components configured to be connected to a three-phase AC grid; and
an electric part including a multi-phase voltage system configured to be connected to a common DC capacitor;
wherein the magnetic part is configured to split 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 line of the multi-pulse line-interphase transformer converter;
wherein the intermediate phases are connected to the multi-phase voltage system;
wherein the multi-phase voltage system comprises bridges with actively controlled switches;
wherein the bridges are connected in parallel to the common DC capacitor; and
wherein the multi-pulse line-interphase transformer converter further comprises a control unit having a signal processing unit configured to emulate the electric part and to provide emulated intermediate phase signals to a controller for controlling the actively controlled switches, and wherein the emulated intermediate phase signals are sinusoidal signals having a pre-calculated phase angle.