EP 1590990 B1 20061102 - METHOD FOR FEEDING AN INDUCTION FURNACE OR INDUCTOR
Title (en)
METHOD FOR FEEDING AN INDUCTION FURNACE OR INDUCTOR
Title (de)
VERFAHREN ZUR SPEISUNG EINES INDUKTIONSOFENS ODER INDUKTORS
Title (fr)
PROCÉDÉ D'ALIMENTATION D'UN FOUR À INDUCTION OU D'UN INDUCTEUR
Publication
Application
Priority
- EP 0314764 W 20031223
- DE 10304505 A 20030205
Abstract (en)
[origin: WO2004071132A1] Disclosed is a method for feeding an induction furnace or inductor comprising at least one inverted rectifier (2A, 21B, 2C) that is fed by at least one rectifier (1, 1A, 1B, 1C) via at least one intermediate voltage circuit which is provided with an intermediate circuit capacitor (21A, 21B, 21C). At least one resonant capacitor (17, 18) forms a parallel resonant circuit (15) along with the inductive component (19) and the resistive component (20) of the resistive-inductive load (16) generated by the induction furnace or inductor. A modulation factor (m) is formed according to the current load voltage (URL) and the current load power (pI) and is supplied to a pulse-width modulator (7) which establishes the period of conductance (tm) for the semiconductor switches of the inverted rectifiers, which can be turned off, from said modulation factor (m). Each period of conductance (tm) begins, and thus the semiconductor switches are turned on, in strict synchrony with the moment of zero crossing of the load voltage while the switch-off time of the conducting semiconductor switches is defined in accordance with the period of conductance (tm).
IPC 8 full level
H05B 6/06 (2006.01); H05B 6/02 (2006.01); H05B 6/04 (2006.01)
CPC (source: EP)
H05B 6/04 (2013.01); H05B 6/067 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004071132 A1 20040819; AT E344610 T1 20061115; AU 2003296711 A1 20040830; DE 10304505 A1 20040826; DE 50305611 D1 20061214; EP 1590990 A1 20051102; EP 1590990 B1 20061102; ES 2274323 T3 20070516
DOCDB simple family (application)
EP 0314764 W 20031223; AT 03815695 T 20031223; AU 2003296711 A 20031223; DE 10304505 A 20030205; DE 50305611 T 20031223; EP 03815695 A 20031223; ES 03815695 T 20031223