US 12,407,292 B2
Desaturation fault response
Armin Teymouri, Los Angeles, CA (US); Boru Wang, Pasadena, CA (US); and Chia-Chou Yeh, Torrance, CA (US)
Assigned to Rivian IP Holdings, LLC, Plymouth, MI (US)
Filed by Rivian IP Holdings, LLC, Plymouth, MI (US)
Filed on May 2, 2023, as Appl. No. 18/142,136.
Claims priority of provisional application 63/449,521, filed on Mar. 2, 2023.
Prior Publication US 2024/0297607 A1, Sep. 5, 2024
Int. Cl. H02P 29/028 (2016.01); G01R 31/42 (2006.01); H02P 23/14 (2006.01); H02P 27/06 (2006.01)
CPC H02P 29/028 (2013.01) [G01R 31/42 (2013.01); H02P 23/14 (2013.01); H02P 27/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method comprising:
instructing all driving switches of a high-side and a low-side of an inverter coupled to a motor to open simultaneously for a predetermined time period in response to detecting a desaturation fault;
determining a failed driving switch of a side of the high-side or the low-side and a type of failure based on current of the motor during the predetermined time period; and
in response to determining that the type of failure is a fail short, controlling the remaining driving switches of the side of the failed driving switch to close and the driving switches of the other side to remain open if a speed of the motor is above a threshold; or
in response to determining that the type of failure is a fail open, controlling the remaining driving switches of the side of the failed driving switch to remain open and the driving switches of the other side to close while a speed of the motor is above a threshold.