VFD, rotary, or both
VFD, rotary, or both
(OP)
My application is a 3 phase, 300 hz, 12 hp router spindle along with a 75 amp sander. They will never be run at the same time. I only have single phase available. I would appreciate any comments on what direction to go.
Thanks, Gary
Thanks, Gary





RE: VFD, rotary, or both
JRaef.com
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: VFD, rotary, or both
Whoa, what are you talking about 300Hz???????????
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: VFD, rotary, or both
JRaef.com
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: VFD, rotary, or both
Thanks, Gary
RE: VFD, rotary, or both
Making those assumptions, get a 60Hz RPC for the total load (your HP was meaningless without voltage, but again ASSuming it to be 230V, roughly 29A), maybe 120A continuous or so. Then use a VFD to provide the 300Hz for your router. To do the entire job with a VFD, even if you only run one at a time, would mean buying a 150HP 230V VFD, NOT cheap! You would also run the risk of accidentally applying 300Hz to that sander if you forget to change the limits one day, which would likely destroy the sander!
Another alternative would be to get an RPC for just the sander, then use a VFD to do both the phase conversion and high frequency. The caveat to that is that the VFD would still need to be doubled in size to do the phase conversion, so a 25HP VFD for that 12HP motor.
JRaef.com
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: VFD, rotary, or both
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com