POWER SUPPLY DEVICE FOR ARC APPARATUS
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United States of America Patent
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Issued Date -
May 21, 2009
app pub date -
Apr 7, 2008
filing date -
Nov 15, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
This power supply device for an arc apparatus includes: a three phase full wave rectification circuit in which a plurality of semiconductor switching elements are connected in inverse parallel with a plurality of rectification elements, and which rectifies a three phase AC power supply; an AC reactor which is connected to the three phase AC power supply and the three phase full wave rectification circuit; a smoothing capacitor which smoothes the output voltage of the three phase full wave rectification circuit; an inverter circuit which converts the output of the smoothing capacitor to high frequency AC; and a rectification circuit which rectifies the output of the inverter circuit and supplies the result to a load. Moreover, this power supply device for an arc apparatus also includes a control is circuit which performs switching control of the semiconductor switching elements, so that the phases of the input voltage and of the input current of the three phase AC power supply agree with one another.
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