CPC H02J 7/00711 (2020.01) [B60L 53/30 (2019.02); B60L 53/60 (2019.02); H02J 7/0013 (2013.01); H02J 7/00714 (2020.01); H02J 7/02 (2013.01); H02M 3/33573 (2021.05); H02M 3/33592 (2013.01); B60L 2210/30 (2013.01); B60L 2210/40 (2013.01); H02J 2207/20 (2020.01); H02J 2310/48 (2020.01); H02M 1/44 (2013.01)] | 20 Claims |
1. A vehicle battery charger comprising:
at least one transformer having one or more primary windings and one or more secondary windings;
a first active bridge including a first plurality of switching devices being positioned with the one or more primary windings on a primary side of the charger to generate a first voltage signal in response to an input voltage signal from a mains supply;
a second active bridge including a second plurality of switching devices being positioned with the one or more secondary windings on a secondary side of the charger to generate a second voltage signal having a current ripple in response to the first voltage signal;
a pulsating buffer (PB) converter interfacing with the second active bridge and being configured to reduce or eliminate the current ripple from the second voltage signal and to generate a smoothed output signal suitable for storage on one or more batteries on a vehicle; and
at least one controller configured to:
selectively activate the first plurality of switching devices based on a single primary control signal to generate the first voltage signal in response to the input voltage signal;
selectively activate the second plurality of switching devices based on a single secondary control signal to generate the second voltage signal in response to the first voltage signal, the at least one controller being configured to generate the single secondary control signal in accordance to a first control variable that corresponds to a duty cycle; and
generate a second control variable that corresponds to a phase shift between the single primary control signal and the single secondary control signal, wherein the second control variable enables the at least one controller to transfer power between the first active bridge and the second active bridge.
|