US 12,316,233 B2
Modulation to extend zero-voltage switching margin for dual-active bridge converter
Yanjun Shi, Torrance, CA (US); Zahra Mohajerani, Los Angeles, CA (US); Lixiang Wei, Irvine, CA (US); and Mohammad Nanda R. Marwali, Irvine, CA (US)
Assigned to Rivian IP Holdings, LLC, Plymouth, MI (US)
Filed by Rivian IP Holdings, LLC, Plymouth, MI (US)
Filed on Nov. 9, 2022, as Appl. No. 17/984,092.
Prior Publication US 2024/0154534 A1, May 9, 2024
Int. Cl. H02M 3/335 (2006.01)
CPC H02M 3/33584 (2013.01) [H02M 3/3353 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
detecting a bus voltage of a dual active bridge (DAB) converter, wherein the DAB comprises a primary bridge, a secondary bridge, and a transformer coupling the primary bridge to the secondary bridge;
determining a first duty ratio of the primary bridge and a second duty ratio of the secondary bridge;
modifying at least one of the first duty ratio and the second duty ratio by adjusting at least one of a differential mode (DM) adjustment variable and a common mode (CM) adjustment variable based on the detected bus voltage; and
causing a plurality of switch control signals, which are provided to respective switches of the primary bridge and the secondary bridge, to switch according to a time-based switching sequence based on the first duty ratio and the second duty ratio.