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:
Mar. 22, 2011
Filed:
Nov. 02, 2007
Thomas Haag, Oberhausen-Rheinhausen, DE;
Jörg Bögel, Oberderdingen, DE;
Hartmut Friedrich, Bretten-Ruit, DE;
Thomas Haag, Oberhausen-Rheinhausen, DE;
Jörg Bögel, Oberderdingen, DE;
Hartmut Friedrich, Bretten-Ruit, DE;
E.G.O. Elektro-Geraetebau GmbH, Oberderdingen, DE;
Abstract
An arrangement for controlling induction coils of an induction cooking hob so as to minimize noise production resulting from intermodulation of certain frequencies of operation. The induction coils are operated in two modes, with a first mode at the same frequency fso to produce a low intermodulation or differential frequency, or at a second mode having a high differential frequency of about 18 kHz. Alternating back and forth between said modes of operation makes it possible to reach predefined average values for the power of the induction coils for a given time period, while at the same time minimizing development of disturbing noise.