Abstract: Disclosed examples include power conversion systems, methods and computer readable mediums to operate an inverter to drive a motor load through an intervening filter, by computing a speed error value according to a speed reference value and a speed feedback value, computing a torque reference value according to the speed error value, computing a motor current reference value according to the torque reference value, compensating the motor current reference value according to capacitor currents of the output filter using a transfer function representing an output current to input current amplitude vs. frequency behavior of the output filter and the motor load, and controlling the inverter according to the inverter output current reference value.
Type:
Grant
Filed:
February 3, 2016
Date of Patent:
October 24, 2017
Assignee:
Rockwell Automation Technologies, Inc.
Inventors:
Semyon Royak, Jingbo Liu, Jingya Dai, Thomas Nondahl, Ehsan Al-Nabi, Peter B. Schmidt