US 11,757,302 B2
Power supply assembly and switch assembly
Esa-Kai Paatero, Helsinki (FI); Alessandro Antoniazza, Cambiasca (IT); and Matteo Cogliati, Arizzano-Verbania (IT)
Assigned to ABB Schweiz AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on May 16, 2022, as Appl. No. 17/663,548.
Claims priority of application No. 21174097 (EP), filed on May 17, 2021.
Prior Publication US 2022/0368155 A1, Nov. 17, 2022
Int. Cl. H02J 9/06 (2006.01); H02J 3/36 (2006.01); H02M 3/156 (2006.01)
CPC H02J 9/062 (2013.01) [H02J 3/36 (2013.01); H02M 3/156 (2013.01)] 12 Claims
OG exemplary drawing
 
11. A switch assembly comprising:
a supply switch system having an input and an output, and adapted to controllably provide an electrically conductive connection between the input and the output, and to disconnect said electrically conductive connection, the supply switch system comprising a plurality of supply switch units connected in parallel, each of the supply switch units comprising a controllable semiconductor switch;
a series impedance system having at least one series impedance member and being adapted to provide a balancing voltage drop for each of the parallel connected supply switch units of the supply switch system, wherein the series impedance system is in series with the supply switch system, and the balancing voltage drop is in a range of 30-400 mV at a nominal current of the supply switch unit; and
a plurality of supply switch modules such that the supply switch system is accommodated in the plurality of supply switch modules,
wherein the at least one series impedance member comprises at least one series inductance member,
wherein the supply switch system comprises at least one supply switch unit pair each of which comprises two parallel connected supply switch units of the supply switch system, and the series impedance system comprises a coupled inductor for each of the at least one supply switch unit pair such that each of the coupled inductors comprises a first series inductance member connected in series with one supply switch unit of the supply switch unit pair, and a second series inductance member connected in series with the other supply switch unit of the supply switch unit pair, wherein there is a inductive coupling between the first series inductance member and the second series inductance member.