公开(公告)号：US10263558B2

公开(公告)日：2019-04-16

申请号：US15071374

申请日：2016-03-16

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Ahmed Mohamed Sayed Ahmed ,  Kanikesh Yedla ,  Zhenyu Ye ,  Prathamesh R. Vadhavkar

IPC: H02P27/08 ,  H02P3/00 ,  H02M5/458 ,  G01R29/18 ,  G01R19/165 ,  H02M1/12 ,  H02M1/32 ,  H02M7/219

Abstract: System, apparatus and methods are provided for identifying a phase loss condition in a motor drive. In one example, a power conversion system includes an active rectifier, a switching inverter, and a controller. The controller is operative to generate rectifier switching control signals to operate the rectifier, measure AC input voltage signals and determine grid current signals. If the rectifier circuit is not in a switching mode, the controller identifies a suspected AC input phase loss condition if two of the AC input voltage signals are in phase with one another. If the rectifier is in the switching mode, the controller identifies a suspected AC input phase loss condition if the absolute value of the sum of two of the grid current signals is less than a predetermined non-zero threshold.

公开(公告)号：US10756659B1

公开(公告)日：2020-08-25

申请号：US16398961

申请日：2019-04-30

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Bing Li ,  Timothy M. Rowan ,  Zhenyu Ye ,  Zhendong Zhang

IPC: H02P21/13 ,  H02P21/22 ,  H02P21/00

Abstract: For counter electromotive force estimation, a disturbance estimator calculates an estimated disturbance as a control function of a quadrature axis current regulator output signal and a quadrature axis current feedback signal of a running permanent magnet motor. A calculator calculates an estimated counter electromotive force of the running permanent magnet motor as a function of the estimated disturbance, a control flux, and an angular velocity.

公开(公告)号：US20170272023A1

公开(公告)日：2017-09-21

申请号：US15071374

申请日：2016-03-16

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Ahmed Mohamed Sayed Ahmed ,  Kanikesh Yedla ,  Zhenyu Ye ,  Prathamesh R. Vadhavkar

IPC: H02P27/08 ,  G01R29/18 ,  H02M5/458

CPC classification number: H02P27/08 ,  G01R19/1658 ,  G01R29/18 ,  H02M1/126 ,  H02M1/32 ,  H02M5/4585 ,  H02M7/219

Abstract: System, apparatus and methods are provided for identifying a phase loss condition in a motor drive. In one example, a power conversion system includes an active rectifier, a switching inverter, and a controller. The controller is operative to generate rectifier switching control signals to operate the rectifier, measure AC input voltage signals and determine grid current signals. If the rectifier circuit is not in a switching mode, the controller identifies a suspected AC input phase loss condition if two of the AC input voltage signals are in phase with one another. If the rectifier is in the switching mode, the controller identifies a suspected AC input phase loss condition if the absolute value of the sum of two of the grid current signals is less than a predetermined non-zero threshold.