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:
May. 26, 2015
Filed:
Jul. 13, 2012
Bruce W. Weiss, Milwaukee, WI (US);
Doyle F. Busse, Muskego, WI (US);
Jeremy J. Keegan, Kewaskum, WI (US);
Lixiang Wei, Whitefish Bay, WI (US);
Michael W. Loth, Germantown, WI (US);
Rangarajan M. Tallam, Germantown, WI (US);
Yogesh Patel, Grafton, WI (US);
Bruce W. Weiss, Milwaukee, WI (US);
Doyle F. Busse, Muskego, WI (US);
Jeremy J. Keegan, Kewaskum, WI (US);
Lixiang Wei, Whitefish Bay, WI (US);
Michael W. Loth, Germantown, WI (US);
Rangarajan M. Tallam, Germantown, WI (US);
Yogesh Patel, Grafton, WI (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
Systems and methods are provided for pre-charging the DC bus on a motor drive. Pre-charging techniques involve pre-charge circuitry including a manual switch, an automatic switch, and pre-charge control circuitry to switch the automatic switch between pre-charge and pre-charge bypass modes in response to an initialized pre-charge operation, input voltage sags, and so forth. In some embodiments, the pre-charge operation may be initialized by switching the manual switch closed. In some embodiments, the pre-charge operation may also be initialized by a detected voltage sag on the DC bus. The pre-charge circuitry may also be configured to disconnect to isolate a motor drive from the common DC bus under certain fault conditions.