The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2016
Filed:
Feb. 28, 2014
Thomas Nondahl, Greenfield, WI (US);
Jingbo Liu, Grafton, WI (US);
Peter Schmidt, Franklin, WI (US);
Semyon Royak, Orange Village, OH (US);
Timothy M. Rowan, Wauwatosa, WI (US);
Thomas Nondahl, Greenfield, WI (US);
Jingbo Liu, Grafton, WI (US);
Peter Schmidt, Franklin, WI (US);
Semyon Royak, Orange Village, OH (US);
Timothy M. Rowan, Wauwatosa, WI (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
Motor drives and control methods are presented for sensorless motor speed control in which inverter output currents are sampled from the inverter output and a frequency modulation value is determined based on the current feedback. A speed or frequency setpoint is adjusted at least partially according to the frequency modulation value to provide an adjusted frequency or speed setpoint value that is then used in controlling the inverter to provide stability control to mitigate hunting or motor stoppage.