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:
Jul. 08, 2008
Filed:
May. 11, 2005
Applicant:
Walter Koellner, Suwanee, GA (US);
Inventor:
Walter Koellner, Suwanee, GA (US);
Assignee:
Siemens Energy & Automation, Inc., Alpharetta, GA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 7/285 (2006.01);
U.S. Cl.
CPC ...
Abstract
Certain exemplary embodiments can include a static DC electric drive system for mining equipment. The drive system can include: an active front end adapted to receive an AC voltage and output a substantially constant DC voltage; and a DC chopper coupled to the active front end, the DC chopper adapted to receive the substantially constant DC voltage and output a variable DC voltage.