Patent · US Active

Limiting peak electrical power drawn by mining excavators

US8174225B2 · kind B2 · utility

15Cited by

3References

30Claims

0Family size

Assignee

Siemens Industry, Inc. · US

Inventors

Joy Mazumdar · Norcross, US
Walter Köllner · Korschenbroich, DE
Andreas Holweck · Erlangen, DE
Michael G. Onsager · Franklin, US
Ekkehard Pittius · Roth, DE

Key dates

Filing date	May 15, 2009
Grant date	May 8, 2012
Priority date	—
Expiry date	Aug 18, 2030

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE02F9/2091
WIPO fieldCivil engineering
WIPO sectorOther fields

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.