CAD CAM EDM DRO - Yahoo Group Archive

VFD ?

Posted by Hugh Currin
on 2002-03-05 11:56:50 UTC
Knowledgeable Ones:

I have a question regarding the inards of a variable frequency drive which I
hope you can help me with.

I understand a VFD rectifies line voltage to DC then inverts it at the
required frequency. My question is how it then inverts the DC. Is this a
chopped voltage like a pulse width modulation to build the AC wave form? Or
does it generate varying DC levels? I would suspect the former but do not
know.

TIA.

Hugh Currin
Klamath Falls, OR

Discussion Thread

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