公开(公告)号：US20170317615A1

公开(公告)日：2017-11-02

申请号：US15142416

申请日：2016-04-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Daniel J. Berry ,  Wei D. Wang ,  Bon Ho Bae ,  Brian A. Welchko ,  Wesley G. Zanardelli ,  Melissa R. McNeely

IPC: H02P3/12 ,  B60L3/04

CPC classification number: H02P3/12 ,  B60L3/0061 ,  B60L3/0069 ,  B60L3/04 ,  H02H3/023 ,  H02H7/0805 ,  H02H7/0838 ,  H02H7/09 ,  H02P29/0241 ,  Y02T10/642

Abstract: A torque system includes a DC power device, a polyphase electric machine, a contactor pair, a power inverter module (PIM), and a controller. The PIM connects to the power device via the contactor pair and directly connects to the electric machine. The controller executes a method to control a fault response under a fault condition resulting in opening of the contactor pair and a polyphase short condition. The controller calculates a back EMF of the electric machine and transmits switching control signals to semiconductor switches of the PIM to transition from the polyphase short condition to a polyphase open condition only when the calculated back EMF is less than a calibrated value and a voltage rise on a DC side of the PIM is less than a calibrated voltage rise. A vehicle includes the DC power device, road wheels, electric machine, PIM, and controller.