公开(公告)号：US09906173B2

公开(公告)日：2018-02-27

申请号：US14516120

申请日：2014-10-16

Applicant: ABB Schweiz AG

Inventor： Jan Wiik ,  Edgar Jellum ,  Trond Haugen ,  Harald Fretheim

IPC: H02P6/12 ,  H02P25/03 ,  H02P23/00

CPC classification number: H02P6/12 ,  H02P23/0077 ,  H02P25/03

Abstract: A method for estimating a motor parameter in a load commutated inverter arrangement, including the steps of: measuring a motor side ac-voltage; detecting commutation interval information of the measured motor side ac-voltage; estimating a motor parameter based on the detected commutation interval information; and indicating when the estimated motor parameter deviates from a monitoring parameter thereof.