公开(公告)号：US11081948B2

公开(公告)日：2021-08-03

申请号：US16021947

申请日：2018-06-28

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Jonathan Hair ,  David Crist Gabriel ,  Elizabeth Rose Bifano ,  Travis Smith ,  Arun Ganesan ,  Brian Khoi-Duy Nguyen

IPC: H02K24/00 ,  B60K6/20 ,  H02P6/15 ,  H02P6/16 ,  G07C5/08 ,  H02K11/33 ,  H02K11/35 ,  H02K11/21

Abstract: An electric drive system for a vehicle includes a speed/position feedback device coupled to an electric machine and configured to provide an index pulse. The system further includes an inverter having a line voltage sensor. The system includes a controller programmed to, responsive to the electric machine rotating at a generally constant speed without commanding the inverter, generate a resolver offset from a time difference between a zero crossing of a line voltage and the index pulse and operate the inverter according to the resolver offset.