US 12,451,806 B2
Balanced boost DC/DC converter
Manuel Raimann, Salem (DE)
Assigned to ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed by ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed on Jul. 19, 2023, as Appl. No. 18/355,208.
Claims priority of application No. 102022207433.5 (DE), filed on Jul. 21, 2022.
Prior Publication US 2024/0030816 A1, Jan. 25, 2024
Int. Cl. H02M 3/158 (2006.01); B60L 50/70 (2019.01)
CPC H02M 3/158 (2013.01) [B60L 50/70 (2019.02); B60L 2210/14 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A symmetrical DC-to-DC boost converter, comprising:
a DC input voltage source that has a negative DC voltage input and a positive DC voltage input;
a negative DC and a positive DC voltage output;
at least four switches;
two chokes, one of which is connected to the negative DC voltage input and two adjacent switches, and the other of which is connected to the positive DC voltage input and two other adjacent switches, such that a symmetrical topology with separate DC voltage inputs is obtained;
an input capacitor between the voltage inputs;
a first symmetry capacitor connected to the negative DC voltage input and the negative DC voltage output such that the first symmetry capacitor is connected across the negative DC voltage input and the negative DC voltage output; and
a second symmetry capacitor connected to the positive DC voltage input and the positive DC voltage output such that the second symmetry capacitor is connected across the positive DC voltage input and the positive DC voltage output.