I'm going to put the 10hp back in and tune the phase converter using the Fitch method. I've never seen using a cap across A and B before. He uses both amps and volts to tune and the instructions are very good and seems worth a good try.
http://www.practicalmachinist.com/FitchWConverter.pdf Looking at his diagram is there a way to tell which is A B and C on the motor? does that translate to the wire numbers 1, 2 and 3? Is there a way to meter the wires to tell which is A, B and C? I've noticed the different cap levels on the generated leg to try and balance the AC BC volts. Thanks John On 5/25/2012 9:08 PM, Jon Elson wrote: > John Thornton wrote: >> Ok, what I had been running was 4x60uf caps between 1 and 3 and 1x60uf >> cap between 2 and 3 (generated leg on 3 then) and that seemed to work >> the best. >> > You may just need to up these capacitors. >> at the phase converter >> to ground 1 = 120v, 2 = 120v, 3 = 226v >> phase to phase 1 + 2 = 244v, 2 + 3 = 248v, 1 + 3 = 262v >> >> > Ugh, 226 is WAY high. With 120 on each half of the 240, you should have > approximately 208 V to the generated phase. if you have an equilateral > triangle > with the bas 240 units wide, the height should be 207.8 units. (sin 60 > degrees > * 240 = 207.8). Or, measuring between all 3 lines should give equal > voltages. > Yours is not equal, again. Your 1 - 3 voltage is quite a bit too high. > > Either increasing the cap values or adjusting them to get better > balance ought > to help. > > 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
