When I monitored the DC buss it was rock steady at 600-601v while running. John
On 5/25/2012 9:00 PM, Jon Elson wrote: > gene heskett wrote: >> However, if the problem is related to the spikes on the line caused by slow >> recovery characteristics of the diodes in this kits high voltage DC supply, >> those spikes will be attenuated by the poor high frequency response of the >> transformers. They won't look as if they are big enough to be a problem so >> most would ignore them. >> > Well, this is possible. the generated phase has a much higher impedance > than the supplied > single-phase mains. If this IS the problem, a few big caps of the phase > correction sort > across all the L-L terminals might absorb enough of this to keep the > protection circuits > from tripping. But, of course, the presumably modest Diesel generator > would also have > a somewhat higher impedance, and the drive ran fine on that. So, I'm > still thinking this > is more likely to be a simple phase imbalance problem than a spike > problem. But, > without knowing what sort of input protection gear this system has, it > is impossible > to know. On the other hand, if the input module uses SCR phase-angle > regulation, > then phase imbalances would cause a HUGE problem as they screw up the > commutation angles of the SCRs, and could easily overvolt the DC bus. > > 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
