I have 2 10hp and 1 15hp motors and enough parts to make 3 rotary phase converters. Total capital invested is in the $750-$1000 range. That size motor used is cheap around here. As for turning it back into cash that would be more difficult as there is not much demand for phase converters that I know of in that size range but you can never tell I might be able to sell one or two for $500 or so.
I agree it would be a cleaner solution and I'm very tempted at this point. Without much research so far I assume I would need the $4.7k model 55 amp model. Further testing is needed... I seldom run more than one CNC machine at a time and almost never run the 3-phase manual lathe at the same time. So the $3.1k model may fill my needs with 30 amps. The manual lathe and the CNC lathe are very happy running on a phase converter but I'd rather not have the noise of the idler motor in the shop as they seem to be a bit noisy... and I'm rambling on now just trying to make some sense. I need to open a dialog with phase technologies and see what they say. Just reading the PT instructions they do show that they take the single phase and convert it to DC then back to AC but only do that for one leg... http://www.phaseperfect.com/files/op_inst_pt.pdf A snippet of the manual The input module takes power from the input lines and charges a DC bus. The output module then draws power from the DC bus to generate an AC voltage referenced to L2 of the input. L1 and L2 of the single-phase input pass directly through the phase converter to provide two legs of the threephase output. A manufactured phase is combined with the two input legs to produce three-phase output power. Hence, the three-phase output voltage will be equal to the single-phase input voltage (e.g. a 240 VAC single-phase input will produce 240 VAC three-phase output). The three-phase output is delta configured. While the phase-to-phase voltages are equal, the phase-to-ground voltages are not equal. Phase-to-ground voltage for both T1 and T2 should be approximately 120V. Phase-toground for T3 should be approximately 208V. For three-phase loads that are designed for delta connection, the load derives its voltage phase-to-phase, so the phase-to-ground voltage should not affect the operation of the equipment. If the connected load has a neutral connection and requires wye configured power, the output of the phase converter must be passed through a delta-to-wye isolation transformer before connection to the load. Thanks John On 5/25/2012 6:45 AM, andy pugh wrote: > On 25 May 2012 11:42, John Thornton<bjt...@gmail.com> wrote: >> Thanks for the price sheet. That is over double what I can get a diesel >> generator for around here. > It might be a better / cleaner solution, though. And it might release > some capital if you can sell your existing rotary convertors? > How much other 3-phase kit do you have? > > I have found a lot of documentation on the Siemens site: > http://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&siteid=cseus&aktprim=0&extranet=standard&viewreg=WW&objid=10804939&treeLang=en > Which infeed unit do you have? Have you checked to see if it can be > configured for single-phase operation? > (it looks like SimoDrive is the drive part, and the Dc converter will > be something else) > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
