Patent · US Active

Method for operating an induction heating device

US8415594B2 · kind B2 · utility

4Cited by

19References

17Claims

0Family size

Assignee

E.G.O. Elektro-Geraetebau GmbH · DE

Inventors

Wilfried Schilling · Gondelsheim, DE
Ralf Dorwarth · Oberderdingen, DE
Martin Volk · Baden-Baden, DE
Tobias Schönherr · Gondelsheim, DE

Key dates

Filing date	Apr 11, 2008
Grant date	Apr 9, 2013
Priority date	—
Expiry date	Dec 29, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH05B6/062
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a method for operating an induction heating device. The induction heating device comprises an induction coil and a frequency converter for producing a control voltage for the induction coil. The frequency converter comprises a rectifier rectifying an alternating supply voltage (UN), an intermediate circuit capacitor, looped in between output terminals of the rectifier and equalizing the rectified voltage (UG), and at least one controllable switching element, looped in between the output terminals of the rectifier. According to the invention, in a predetermined discharge interval (INT) before a zero crossing (ND) of the alternating supply voltage (UN), the intermediate circuit capacitor is discharged to a threshold value by controlling the at least one switching element before the induction coil is controlled in order to produce an adjustable heating capacity.

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