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:
Feb. 15, 2011
Filed:
Sep. 27, 2006
Henrik Joergensen, Graasten, DK;
Rune Thomsen, Loegumkloster, DK;
Henrik Joergensen, Graasten, DK;
Rune Thomsen, Loegumkloster, DK;
Danfoss Compressors GmbH, Flensburg, DE;
Abstract
A method and a control unit for controlling a power level being drawn from a power source (). Based on a determined rate of change of a measured voltage () an estimated remaining runtime is calculated. The estimated remaining runtime represents a time where specific run criteria will no longer be fulfilled if the present power level is maintained. The estimated remaining runtime is compared to a threshold value, and in case the estimated remaining runtime is shorter than the threshold value, the power drawn from the power source () is decreased. Thereby the runtime for the power source () is maximised. This is particularly useful if the power source is a limited power source, such as a battery (), e.g. for running a compressor () for a movable refrigeration system (). The invention is suitable for automotive applications.