公开(公告)号：US20240243682A1

公开(公告)日：2024-07-18

申请号：US18153386

申请日：2023-01-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Dylan M. Day ,  Matthew From ,  Young J. Kim ,  Daniel J. Berry

IPC: H02P27/08 ,  B60L53/10 ,  H02M7/00

CPC classification number: H02P27/08 ,  B60L53/11 ,  H02M7/003

Abstract: An electric drive system includes a direct current (DC) power supply, a rotary electric machine connectable to a load, a power inverter module (PIM), and a controller. The PIM includes a bulk capacitor connected to the DC power supply, along with a plurality of power switches. Each power switch has an output side connected to the electric machine and an input side connected to the bulk capacitor. The controller executes a method to estimate an internal temperature of the bulk capacitor as an estimated internal temperature. This occurs in response to an enabling condition. The controller then selectively derates the electric machine in response to the estimated internal temperature.