US 12,322,955 B2
HV switch unit with snubber arrangements
Andrzej Klimczak, Warsaw (PL); Michal Balcerak, Marki (PL); and Andrzej Gieraltowski, Warsaw (PL)
Assigned to TRUMPF HUETTINGER SP. Z O. O., Zielonka (PL)
Filed by TRUMPF Huettinger Sp. z o. o., Zielonka (PL)
Filed on Feb. 2, 2023, as Appl. No. 18/163,305.
Application 18/163,305 is a continuation of application No. PCT/EP2021/071922, filed on Aug. 5, 2021.
Claims priority of application No. 20461558 (EP), filed on Aug. 6, 2020.
Prior Publication US 2023/0170688 A1, Jun. 1, 2023
Int. Cl. H02H 9/04 (2006.01); H02H 1/00 (2006.01)
CPC H02H 9/04 (2013.01) [H02H 1/0007 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of balancing voltage distribution over a plurality of switches connected in series with each other in a high voltage (HV) switch, wherein a snubber arrangement is associated with each switch of the plurality of switches, the method comprising the steps of:
a. for a first snubber arrangement associated with a first switch of the plurality of switches, determining a first voltage across a first snubber energy storage component of the first snubber arrangement associated with the first switch,
b. for a second snubber arrangement associated with a second switch of the plurality of switches, determining a second voltage across a second snubber energy storage component of the second snubber arrangement associated with the second switch,
c. comparing the first voltage and the second voltage with each other,
d. based on the comparison, adjusting a first drive signal of at least the first switch based on the first voltage, wherein a drive signal is provided and one of the plurality of switches is driven by the drive signal, and at least the first switch is driven by the adjusted first drive signal.