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. 22, 2007
Filed:
Nov. 21, 2002
Kenneth Skaug, Hoejbjerg, DK;
Michael Toennes, Soenderborg, DK;
Nils-ole Harvest, Nordborg, DK;
Egon Krogh, Soenderborg, DK;
Andreas Aupke, Egernsund, DK;
Kenneth Skaug, Hoejbjerg, DK;
Michael Toennes, Soenderborg, DK;
Nils-Ole Harvest, Nordborg, DK;
Egon Krogh, Soenderborg, DK;
Andreas Aupke, Egernsund, DK;
Danfoss Drives A/S, Graasten, DE;
Abstract
The invention is directed to controlling an electric motor by means of a frequency converter. The frequency converter can be connected to one of several different mains voltages. According to the present invention, the maximum output power of the frequency converter, is limited when the actual mains voltage is lower than the maximum nominal mains voltage, for which the frequency converter is designed, and during the limitation the frequency converter controls the speed of the motor within a power range up to a limited maximum output power. This gives a genuine multi-voltage unit, which can be connected to a wide range of mains voltages.