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:
Sep. 17, 2013
Filed:
May. 08, 2012
Joy Mazumdar, Norcross, GA (US);
Walter Köllner, Suwanee, GA (US);
Andreas Holweck, Erlangen, DE;
Michael G. Onsager, Franklin, WI (US);
Ekkehard Pittius, Roth, DE;
Joy Mazumdar, Norcross, GA (US);
Walter Köllner, Suwanee, GA (US);
Andreas Holweck, Erlangen, DE;
Michael G. Onsager, Franklin, WI (US);
Ekkehard Pittius, Roth, DE;
Siemens Industry, Inc., Alpharetta, GA (US);
Caterpillar Global Mining LLC, Oak Creek, WI (US);
Siemens Aktiengesellschaft, München, DE;
Abstract
The maximum electrical power drawn from an electrical power source by a mining excavator comprising electric motors is reduced by supplying supplementary electrical power from an electrical energy storage unit. The input electrical power drawn by the mining excavator is cyclic. An upper limit is set for the electrical power drawn from the electrical power source. When the input electrical power drawn by the mining excavator exceeds the upper limit, electrical power is supplied by the electrical energy storage unit, such as an ultracapacitor bank. The ultracapacitor bank may be charged by the electrical power source during off-peak intervals. Electrical power generated by electrical motors operating in a regeneration interval may also be recaptured and stored in the electrical energy storage unit.