公开(公告)号：US10598732B2

公开(公告)日：2020-03-24

申请号：US15978720

申请日：2018-05-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Azeem Sarwar ,  Madi Zholbaryssov ,  Wesley G. Zanardelli ,  Yo Chan Son ,  Ethan M. Blakley

IPC: H02K11/26 ,  G01R31/34 ,  H02K21/12

Abstract: A method and system for detecting a fault in a permanent magnet synchronous motor (PMSM), operably connected to a controller. The method includes receiving at a controller a stator voltages and currents for the PMSM, computing a negative sequence current and a negative sequence voltage for the PMSM; and determining if conditions are satisfied for monitoring for a fault of the PMSM. The method also includes ascertaining a change in the negative sequence current and a change in the negative sequence voltage for a selected time duration, calculating a ratio of the change in the negative sequence current and the negative sequence voltage corresponding to a negative sequence admittance for the PMSM, determining if the negative sequence admittance differs from a nominal value in excess of a threshold; and identifying the stator winding as faulted if the ratio exceeds the threshold.

公开(公告)号：US20190250205A1

公开(公告)日：2019-08-15

申请号：US15895425

申请日：2018-02-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Azeem Sarwar ,  Madi Zholbaryssov ,  Wesley G. Zanardelli ,  Yo Chan Son

IPC: G01R31/26 ,  G06F17/50 ,  G08B21/18

CPC classification number: G01R31/2619 ,  G06F17/5036 ,  G08B21/182 ,  H01L23/3735 ,  H01L25/18 ,  H01L29/7393 ,  H01L29/861 ,  H02P27/06

Abstract: An apparatus and method for determining occurrence of a fault at an insulated-gate bipolar transistor (IGBT) module is disclosed. The IGBT module and apparatus can be part of an electric vehicle. A sensor obtains a measurement of a thermal parameter of the IGBT module. A processor receives the measured thermal parameter from the sensor, and runs a model of the IGBT module to determine a thermal parameter of the IGBT module under normal operation conditions. The processor provides an alert signal to indicate the occurrence of the fault when a difference between the estimated thermal parameter and the measured thermal parameter is greater than or equal to a selected threshold.