Re: [CAD_CAM_EDM_DRO] rotary phase converters, VFD

In a message dated 12/25/2003 7:56:43 PM Eastern Standard Time,
Yesamazza@... writes:
Hi
There has been a lot of discussion about phase converters and VFD drives.
I have had mixed results. I purchased a factory phase converter (10hp) that
was loud and had trouble with it overloading thermal breakers. I had a
friend
put an Amp probe on it and we changed some compacitors around and it has
worked great every since. I have later made smaller converters with the help
of
the article form "how to build a phase converter" the link is
http://www.metalwebnews.com/howto/ph-conv/ph-conv.html . I like VFD but the
drive will run one
machine and then you have to buy another. I run an injection molder,CNC
mill,Cnc lathe and two manual machines all from the one converter. Good luck
and
happy machining
You just hit the main reason for rotary phase converters out there as opposed
to using the single phase input VFD units. Cost, if you have very many
motors to run, you will need a separate VFD to run each of them and that can run
quite a bit more than a single rotory phase converter for the whole lot.


Randy Abernathy
4626 Old Stilesboro Road NW
Acworth, GA 30101, U.S.A.
Phone / Fax: 770-974-5295
Cell: 678-772-4113
E-mail: cnc002@...

I furnish technical support, repair, and other related services for your
industrial woodworking machinery. My background as Senior Service Engineer for the
SCMI Group for nearly fifteen years with factory training, combines with my
extensive background in electronics, mechanics, pneumatics, electrical and CNC
machinery to offer you needed support for your machinery.


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