This is the third motor I've tried on this beast. The current one is a 15hp 1750 rpm very heavy built with a large multi-belt pulley on the shaft. I've tried cap combinations out the yen yang. The voltage levels I reported a while back was with different combinations of caps to balance the generated leg.
John On 5/24/2012 12:42 PM, Jon Elson wrote: > John Thornton wrote: >> I've built several rotary phase converters using plans from the web but >> they all seem to stop at adding a few caps to balance the voltage and >> the auto start circuit with the potential relay. >> >> Have you ever peeked into your commercial unit to see what else is there? >> > Well, the iron and windings might be slightly different. You can > measure the > L-L voltages under different loads and adjust the number of caps between > terminals to get the best overall balance. Also, it has been found that > certain > motors simply make poor phase converters, and others make wonderful > ones. I have never seen a definitive report on what to look for, though, > like older better than newer or vice versa, high-efficiency better than > lower, > 1725 better than 3450 or whatever specs are apparent from the outside. > But, you might just try a different motor on this converter. ISTR that > you reported some large voltage fluctuations under different load > conditions a while back. > > Jon > > ------------------------------------------------------------------------------ > 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 ------------------------------------------------------------------------------ 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
