公开(公告)号：US10126150B2

公开(公告)日：2018-11-13

申请号：US15466487

申请日：2017-03-22

Applicant: ABB Technology Oy

Inventor： Antti Piippo ,  Matti Eskola ,  Samuli Kallio

IPC: G01D5/244 ,  G01D5/243 ,  H02P6/15 ,  B66B5/18

Abstract: The present disclosure describes a two-stage method for estimating an angle offset of an angle sensor in a system comprising a permanent-magnet synchronous motor. An initial value for the estimated angle offset is first determined with a short circuit test. Next, a torque of the motor may be controlled so that the motor is maintained at a zero speed. Minor adjustments are made to the value of the angle offset to find a minimum magnitude of stator current. A value at which the stator current is at its minimum is used as a final angle offset.

公开(公告)号：US20170276519A1

公开(公告)日：2017-09-28

申请号：US15466487

申请日：2017-03-22

Applicant: ABB Technology Oy

Inventor： Antti Piippo ,  Matti Eskola ,  Samuli Kallio

IPC: G01D5/244 ,  H02P6/15 ,  B66B5/18 ,  G01D5/243

CPC classification number: G01D5/2448 ,  B66B5/18 ,  G01D5/2013 ,  G01D5/243 ,  H02P6/15 ,  H02P6/20

Abstract: The present disclosure describes a two-stage method for estimating an angle offset of an angle sensor in a system comprising a permanent-magnet synchronous motor. An initial value for the estimated angle offset is first determined with a short circuit test. Next, a torque of the motor may be controlled so that the motor is maintained at a zero speed. Minor adjustments are made to the value of the angle offset to find a minimum magnitude of stator current. A value at which the stator current is at its minimum is used as a final angle offset.