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:
Nov. 27, 2018
Filed:
Aug. 21, 2015
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Christopher H. Bock, Milwaukee, WI (US);
Christopher J. Wieloch, Brookfield, WI (US);
James J. Kinsella, Brentwood, TN (US);
Stefan T. Dziekonski, Greendale, WI (US);
James P. Miller, Waukesha, WI (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
One embodiment describes a method that includes in a first switching operation of an electrical power switching system including three separately controllable single pole, single current-carrying path switching devices that provide three-phase power to a load, and control circuitry coupled to the switching devices to control closing and opening of the current-carrying paths, commanding at least one of the switching devices to open or close in advance of at least one other of the switching devices based upon a current zero-crossing or a predicted current zero-crossing of input three-phase power; and in subsequent switching operations alternating which of the three switching devices is closed or opened in advance of another of the switching devices.