公开(公告)号：US11799354B2

公开(公告)日：2023-10-24

申请号：US17481379

申请日：2021-09-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brian J. Gallert ,  Stephen M. Garza

IPC: H02K7/00 ,  H02P29/028 ,  H02K3/28 ,  H02P29/68

CPC classification number: H02K7/006 ,  H02K3/28 ,  H02P29/028 ,  H02P29/68 ,  H02K2213/03

Abstract: An electric powertrain system includes an electric machine having a rotor and stator. The stator has multiple phase legs, each respective one of which includes a single phase lead connected to two or more parallel stator windings. The stator thus has multiple phase leads collectively conducting phase currents. A rotary output member is connected to the rotor and connectable to a load. A traction power inverter module (TPIM) is electrically connected to the phase legs. Current sensors collectively measure the phase currents. Each respective current sensor is connected to a different phase lead. A controller in communication with the current sensors and the TPIM, in response to a commanded current and the measured phase currents, detects a threshold variation in the measured phase currents indicative of a phase current imbalance fault, and selectively changes a thermodynamic state of the electrified powertrain in response to the fault.

公开(公告)号：US20230087179A1

公开(公告)日：2023-03-23

申请号：US17481379

申请日：2021-09-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brian J. Gallert ,  Stephen M. Garza

IPC: H02K7/00 ,  H02K3/28 ,  H02P29/028

Abstract: An electric powertrain system includes an electric machine having a rotor and stator. The stator has multiple phase legs, each respective one of which includes a single phase lead connected to two or more parallel stator windings. The stator thus has multiple phase leads collectively conducting phase currents. A rotary output member is connected to the rotor and connectable to a load. A traction power inverter module (TPIM) is electrically connected to the phase legs. Current sensors collectively measure the phase currents. Each respective current sensor is connected to a different phase lead. A controller in communication with the current sensors and the TPIM, in response to a commanded current and the measured phase currents, detects a threshold variation in the measured phase currents indicative of a phase current imbalance fault, and selectively changes a thermodynamic state of the electrified powertrain in response to the fault.