US 11,929,632 B2
On-board charger system with integrated auxiliary power supply
Hamidreza Hafezinasab, Sunnyvale, CA (US); and William Albert Stinnett, Sunnyvale, CA (US)
Assigned to LiveWire EV, LLC, Milwaukee, WI (US)
Filed by LiveWire EV, LLC, Milwaukee, WI (US)
Filed on Jan. 27, 2021, as Appl. No. 17/159,298.
Prior Publication US 2022/0239111 A1, Jul. 28, 2022
Int. Cl. H02J 7/00 (2006.01); H02J 7/06 (2006.01); H02M 3/335 (2006.01); H02M 7/219 (2006.01); H02P 27/06 (2006.01)
CPC H02J 7/007 (2013.01) [H02J 7/0042 (2013.01); H02J 7/06 (2013.01); H02M 3/33592 (2013.01); H02J 2207/20 (2020.01); H02M 7/219 (2013.01); H02P 27/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A charger comprising:
a charging interface;
a converter coupled to the charging interface, the converter comprising:
a first plurality of switching transistors coupled to the charging interface,
a transformer comprising a primary winding, a secondary winding, and an auxiliary winding, wherein the primary winding is coupled to the first plurality of switching transistors,
a second plurality of switching transistors coupled between the secondary winding and a battery interface, and
an auxiliary system interface coupled to the auxiliary winding;
a rectifier coupled between the charging interface and the first plurality of switching transistors, comprising an intermediate bus capacitor coupled to the first plurality of switching transistors; and
a controller configured to control the first plurality of switching transistors and the second plurality of switching transistors to generate a first signal at the battery interface and a second signal at the auxiliary system interface;
wherein the converter comprises:
a primary bus capacitor coupled between the second plurality of switching transistors and the battery interface; and
an auxiliary bus capacitor coupled between auxiliary winding and the auxiliary system interface.