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International Trade Fair for Die Casting: Technology, Processes, Products

18 - 20 January 2022 // Nuremberg, Germany

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Exhibitors & Products EUROGUSS 2020
Zoom Image LOGO_IGBT technologyI

IGBT technologyI

LOGO_IGBT technologyI

IGBT technologyI

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There is described a power circuit (10) to supply and control at least one heating element (5), having a single-phase resistive load in alternating voltage, the circuit (10) having a three-phase alternating voltage source (6) comprising: a rectifier (3) suitable to transform the alternating voltage of the three-phase source into a single-phase direct voltage; a frequency converter (4) suitable to transform the single-phase direct voltage into single-phase alternating voltage for the heating element (5); a PLC suitable to control said frequency converter (4), according to a periodic sequence of alternating active phases and recirculation phases such that the effective voltage output from said converter (4) can be regulated by varying the duration of said phases.

The power converter transforms the alternating voltage of the three-phase source into a continuous single-phase voltage downstream of the diode rectifier bridges (3), at the working frequency of the furnace. The single-phase continuous voltage, through a special frequency converter (inverter) (4), is transformed into a alternating single-phase voltage suitable for feeding the induction furnace (7). The circuit further comprises a control unit, not shown in the figure, capable of controlling the inverter in such a way as to provide a desired frequency and single-phase voltage value, downstream of the converter.

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IGBT technologyI is assigned to following product groups:

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