Re: Inside A Plasma Cutter (Must See Pictures for SSTCers!)

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Original poster: John Keith <jskeith-at-interaccess-dot-com> 


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, June 06, 2004 6:50 PM
Subject: Re: Inside A Plasma Cutter (Must See Pictures for SSTCers!)


 > Original poster: "Jim Mitchell" <Electrontube-at-sbcglobal-dot-net>
 >
 > Well,  It draws 30A at 240V.  So Do the math and you see that its drawing
 > 7.2kW max (I'm not sure if this is constant).
 >
 > Yes those two links are incorrect,  Thanks for pointing that out.
 >
 > I believe those diodes aren't rectification,  as the manual states "The
 > output of this device is high voltage/high frequency...)  And the +
 > electrode goes right to the output transformer.

---SNIP---

Hi Jim,
Yes, the diodes are for rectification. Plasma cutters are DC machines, the
high frequency is super-imposed on the DC to start the arc, just like a TIG
welder.

Regards,
John Keith