US 12,081,133 B2
Current control techniques for DC/DC converter
Jyothiraditya Ramaswamy, TamilNadu (IN); Yingying Kuai, Dunlap, IL (US); and Gholamreza Esmaili, San Diego, CA (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Jul. 27, 2022, as Appl. No. 17/874,545.
Prior Publication US 2024/0039415 A1, Feb. 1, 2024
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/33584 (2013.01) [H02M 1/0058 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A dual active bridge DC/DC converter comprising:
a first full bridge circuit including a first plurality of electronic switches, the first full bridge circuit configured to generate a first voltage;
a second full bridge circuit including a second plurality of electronic switches, the second full bridge circuit configured to generate a second voltage;
a transformer coupled between the first full bridge circuit and the second full bridge circuit;
an inductor coupled between the first full bridge circuit and a primary winding of the transformer; and
a control circuit configured to:
compare a representation of a first harmonic of the first voltage and a representation of a first harmonic of the second voltage;
determine an adjustment factor that, when applied, reduces a difference between the representation of the first harmonic of the first voltage and the representation of the first harmonic of the second voltage; and
determine, using the adjustment factor, a phase shift angle that, when applied to a control signal of at least one of the first plurality of electronic switches or to a control signal of at least one of the second plurality of electronic switches, reduces a peak current in the inductor.