Re: Home shop power for a big machine
Posted by
caudlet
on 2008-12-31 11:20:52 UTC
--- In CAD_CAM_EDM_DRO@yahoogroups.com, "vrsculptor" <vrsculptor@...>
wrote:
you can build a rotary converter that will start a 5hp 3phase motor
spinning then you can start and run an 8-10Hp load. Once you have
that running you can start and run a 15 or 20 horsepower load, etc.
Each 3P motor running without a load on the circuit adds back in power
for the 3rd phase. It's not a net gain (be cool if it was beacuse
then your electricity would be Free (:-) and you need enough front end
watts on the 2 phase to keep all the motors turning but it is one way
to build a lower cost rotary converter for big equipment. You can
find surplus 3 phase motors pretty cheap. There are some good
articles on building your own 3P rotary converter.
wrote:
>one trick is to use "idler" motors to help generate more 3Phase. If
> I was lusting over a big VMC that would never fit in my home shop and
> got to wondering about power. The machine's data plate says 230 volts
> 3PH @ 80 AMP's, 18KVA. It has a 15 HP spindle.
>
> I could use a rotary phase converter to generate the three phase but
> don't have anywhere near 80 AMP's available. 18KVA/750 watts equals a
> 24 HP phase converter.
>
> If you where using this machine in a hobby environment and not trying
> to get production feeds and loads how small of a phase converter could
> you get by with?
>
> Roger
>
you can build a rotary converter that will start a 5hp 3phase motor
spinning then you can start and run an 8-10Hp load. Once you have
that running you can start and run a 15 or 20 horsepower load, etc.
Each 3P motor running without a load on the circuit adds back in power
for the 3rd phase. It's not a net gain (be cool if it was beacuse
then your electricity would be Free (:-) and you need enough front end
watts on the 2 phase to keep all the motors turning but it is one way
to build a lower cost rotary converter for big equipment. You can
find surplus 3 phase motors pretty cheap. There are some good
articles on building your own 3P rotary converter.
Discussion Thread
vrsculptor
2008-12-31 07:10:17 UTC
Home shop power for a big machine
556RECON
2008-12-31 08:31:52 UTC
Re: [CAD_CAM_EDM_DRO] Home shop power for a big machine
Michael Fagan
2008-12-31 08:36:21 UTC
Re: [CAD_CAM_EDM_DRO] Home shop power for a big machine
Jim Fleig - CNC Services
2008-12-31 10:00:26 UTC
Re: [CAD_CAM_EDM_DRO] Home shop power for a big machine
Jon Elson
2008-12-31 11:03:32 UTC
Re: [CAD_CAM_EDM_DRO] Home shop power for a big machine
caudlet
2008-12-31 11:20:52 UTC
Re: Home shop power for a big machine
gcode fi (hanermo)
2008-12-31 11:27:29 UTC
Re: [CAD_CAM_EDM_DRO] Home shop power for a big machine
Yahoo
2008-12-31 12:56:07 UTC
Re: Home shop power for a big machine
shawn c
2008-12-31 16:10:05 UTC
RE: [CAD_CAM_EDM_DRO] Home shop power for a big machine
gcode fi (hanermo)
2008-12-31 16:31:49 UTC
Re: [CAD_CAM_EDM_DRO] Home shop power for a big machine
Jon Elson
2008-12-31 19:59:03 UTC
Re: [CAD_CAM_EDM_DRO] Re: Home shop power for a big machine
Jon Elson
2008-12-31 20:06:03 UTC
Re: [CAD_CAM_EDM_DRO] Home shop power for a big machine
Beau Beaufait
2008-12-31 20:11:44 UTC
Re: [CAD_CAM_EDM_DRO] Home shop power for a big machine
shawn c
2008-12-31 20:42:10 UTC
RE: [CAD_CAM_EDM_DRO] Home shop power for a big machine
Dave Halliday
2008-12-31 22:38:32 UTC
RE: [CAD_CAM_EDM_DRO] Home shop power for a big machine
Roland Jollivet
2009-01-01 11:31:16 UTC
Re: [CAD_CAM_EDM_DRO] Home shop power for a big machine
Matthew Tinker
2009-01-01 11:31:16 UTC
RE: [CAD_CAM_EDM_DRO] Home shop power for a big machine
gcode fi (hanermo)
2009-01-01 11:31:16 UTC
Re: [CAD_CAM_EDM_DRO] Re: Home shop power for a big machine
vrsculptor
2009-01-01 13:03:47 UTC
Re: Home shop power for a big machine - Thanks for the input
Jon Elson
2009-01-01 14:31:34 UTC
Re: [CAD_CAM_EDM_DRO] Re: Home shop power for a big machine - Thanks for the input
Jim Fleig - CNC Services
2009-01-01 18:19:14 UTC
Re: [CAD_CAM_EDM_DRO] Re: Home shop power for a big machine - Thanks for the input
vrsculptor
2009-01-02 10:34:00 UTC
Re: Home shop power for a big machine - Thanks for the input
Jon Elson
2009-01-02 20:40:18 UTC
Re: [CAD_CAM_EDM_DRO] Re: Home shop power for a big machine - Thanks for the input
Michael Fagan
2009-01-03 04:49:48 UTC
Re: [CAD_CAM_EDM_DRO] Re: Home shop power for a big machine - Thanks for the input
smirob1
2009-01-03 06:28:49 UTC
Re: Home shop power for a big machine - Thanks for the input
Jim Peck
2009-01-03 07:35:40 UTC
Home shop power for a big machine - Thanks for the input
Dan Mauch
2009-01-03 13:23:23 UTC
Re: [CAD_CAM_EDM_DRO] Re: Home shop power for a big machine - Thanks for the input
556RECON
2009-01-03 13:40:28 UTC
Re: [CAD_CAM_EDM_DRO] Home shop power for a big machine - Thanks for the input