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:
Apr. 25, 2006
Filed:
Feb. 28, 2005
Jerry D. Thunes, Greenfield, WI (US);
Russel J. Kerkman, Milwaukee, WI (US);
Takayoshi Matsuo, Brown Deer, WI (US);
Jerry D. Thunes, Greenfield, WI (US);
Russel J. Kerkman, Milwaukee, WI (US);
Takayoshi Matsuo, Brown Deer, WI (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
Methods and apparatus for controlling switching in a DC-to-AC inverter to prevent overvoltages applied to an AC motor by determining the switching order of the phase voltage signals, providing gating signals at switching intervals by modulating a carrier wave with the phase voltage signals, comparing the switching intervals to a predetermined minimum time interval sufficient for reflected wave transients to dissipate, and adjusting the switching intervals to be at least equal to the predetermined minimum time interval.