US 12,278,560 B2
Electromagnetic interference mitigation for electric vehicle chargers
Ming Li, Torrance, CA (US); Lixiang Wei, Irvine, CA (US); and Steven Schulz, Torrance, CA (US)
Assigned to Rivian IP Holdings, LLC, Irvine, CA (US)
Filed by Rivian IP Holdings, LLC, Irvine, CA (US)
Filed on Jun. 2, 2022, as Appl. No. 17/830,815.
Prior Publication US 2023/0396157 A1, Dec. 7, 2023
Int. Cl. H02M 1/44 (2007.01); B60L 53/22 (2019.01); H02J 7/02 (2016.01)
CPC H02M 1/44 (2013.01) [B60L 53/22 (2019.02); H02J 7/02 (2013.01); H02J 2207/20 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A system for charging an electric vehicle, comprising:
a first power electronics module (PEM);
a second PEM; and
one or more processors configured to cause the system to perform a method comprising:
receiving a first signal switching at a clock frequency, wherein the first signal is generated via an oscillator;
generating a second signal switching at a second frequency, wherein an absolute difference between the clock frequency and the second frequency is greater than a noise sampling frequency;
switching the first PEM at the clock frequency to provide a first direct current (DC) voltage for charging a first electric vehicle; and
switching the second PEM at the second frequency to provide a second DC voltage for charging the first vehicle or a second electric vehicle, wherein:
the first and second PEMs generate EMI noise, and
a change of the EMI noise sampled at the noise sampling frequency is within a noise fluctuation threshold.