US 12,424,964 B2
Dynamic models for inductor temperature
William Robert Brown, Huntington Woods, MI (US); Baoming Ge, Okemos, MI (US); Papiya Bagchi, Northville, MI (US); and Monty Anderson, Boise, ID (US)
Assigned to FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed by FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed on Feb. 1, 2023, as Appl. No. 18/162,915.
Prior Publication US 2024/0258954 A1, Aug. 1, 2024
Int. Cl. H02P 29/68 (2016.01); H02J 7/00 (2006.01); H02P 23/00 (2016.01); H02P 27/06 (2006.01)
CPC H02P 29/68 (2016.02) [H02J 7/0063 (2013.01); H02P 23/0004 (2013.01); H02P 27/06 (2013.01); H02J 2207/20 (2020.01)] 7 Claims
OG exemplary drawing
 
1. A method of operating a motor of an electric drive system, comprising:
adjusting, with a controller, an output DC voltage of a variable voltage converter having an inductor;
adjusting, with the controller, a winding current such that a motor produces torque;
pumping a coolant from a sump past the inductor using a pump;
reducing the torque of the motor in response to an estimate of an inductor temperature exceeding a threshold, wherein the inductor temperature is estimated by the controller using a dynamic model based on the output DC voltage and a speed of the pump; and
in response to a vehicle being turned off and then back on, estimating the inductor temperature based on an estimate of the inductor temperature before the vehicle was turned off and a measured temperature of the coolant in the sump.