US 12,327,991 B2
AC busbar for current sharing between parallelly connected semiconductor switching pairs
Robert J. Vovos, Vestal, NY (US); Arthur P. Lyons, Maine, NY (US); and Stephen L. Homan, Endicott, NY (US)
Assigned to BAE Systems Controls Inc., Endicott, NY (US)
Filed by BAE Systems Controls Inc., Endicott, NY (US)
Filed on Dec. 16, 2022, as Appl. No. 18/067,152.
Prior Publication US 2024/0204501 A1, Jun. 20, 2024
Int. Cl. H02G 5/02 (2006.01); H02M 7/00 (2006.01)
CPC H02G 5/02 (2013.01) [H02M 7/003 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An AC busbar configured to connect at least three phases from a semiconductor switching unit to a load, each phase having an AC terminal, wherein the at least three phases are connected in parallel by the AC busbar, the AC busbar comprising:
a terminal-side conductor mechanically connectable to each AC terminal of the semiconductor switching unit;
a load-side conductor positioned between the terminal-side conductor and the load, the load-side conductor being parallel to the terminal-side conductor;
two connecting conductors, configured and dimensioned to be surrounded by a current sensor, and connecting the terminal-side conductor and the load-side conductor; and
a conductor orthogonally projecting from the load-side conductor, the orthogonally projecting conductor configured to be connected with the load, the orthogonally projecting conductor is centered on the load-side conductor, wherein a distance between the terminal-side conductor and the load-side conductor is such that a difference in an inductance between a connection point for a respective AC terminal of each phase and a common point on a middle of the load-side conductor is less than a predetermined percentage with respect to an average of the respective inductances.