EP 1719389 A1 20061108 - METHOD AND DEVICE FOR PRODUCING AN ELECTRICAL HEATING CURRENT, ESPECIALLY FOR INDUCTIVELY HEATING A WORKPIECE

Title (en)

METHOD AND DEVICE FOR PRODUCING AN ELECTRICAL HEATING CURRENT, ESPECIALLY FOR INDUCTIVELY HEATING A WORKPIECE

Title (de)

VERFAHREN UND VORRICHTUNG ZUM ERZEUGEN EINES ELEKTRISCHEN HEIZSTROMS, INSBESONDERE ZUM INDUKTIVEN ERWÄRMEN EINES WERKSTÜCKS

Title (fr)

PROCEDE ET DISPOSITIF POUR PRODUIRE UN COURANT ELECTRIQUE DE CHAUFFAGE DESTINE NOTAMMENT AU CHAUFFAGE D'UNE PIECE PAR INDUCTION

Publication

EP 1719389 A1 20061108 (DE)

Application

EP 05715384 A 20050218

Priority

EP 2005001662 W 20050218
DE 102004010331 A 20040225

Abstract (en)

[origin: WO2005081585A1] According to the invention, a heating current that is especially used to inductively heat a metallic or magnetic workpiece is generated by means of an inverter, from an input-side supply voltage. Said inverter has four controllable switching elements (S_P1, S_P2, S_N1, S_N2) that are arranged in relation to each other in an H-bridge circuit having two parallel longitudinal branches (42, 44) and a transversal branch (46). The respectively diagonally opposed switching elements (S_P1, S_P2; S_N1, S_N2) of the bridge circuit are controlled in such a way that the heating flow flows through the transversal branch (46). According to one embodiment of the invention, the diagonally opposed switching elements (S_P1, S_P2; S_N1, S_N2) are switched from the conductive state to the non-conductive state in a temporally staggered manner.

IPC 8 full level

H05B 6/04 (2006.01); H05B 6/02 (2006.01)

CPC (source: EP US)

H05B 6/02 (2013.01 - EP US); H05B 6/04 (2013.01 - EP US)

Citation (search report)

See references of WO 2005081585A1

Designated contracting state (EPC)

DE ES FR GB IT

DOCDB simple family (publication)

WO 2005081585 A1 20050901; DE 102004010331 A1 20050908; DE 102004010331 B4 20140320; EP 1719389 A1 20061108; JP 2007524211 A 20070823; US 2007000917 A1 20070104; US 7375986 B2 20080520; US RE41796 E 20101005

DOCDB simple family (application)

EP 2005001662 W 20050218; DE 102004010331 A 20040225; EP 05715384 A 20050218; JP 2007500110 A 20050218; US 37847409 A 20090213; US 50781706 A 20060822