HP UHU at 250V on a BIG GAMBIN 3C Mill

[jcbm2004]

HelloPaul.
I"ve been doing some tests.
Firsts test using a low voltage low power motor ( 60V/ 6A) were very satisfying.
But when testing on the big motor under 250V my IGBT drivers (IR2113) didn't last more than 10 mn (became very hot )and then l lost control on one half bridge. The same thing happened several times.
After that I've looked at some technical sheets from driver manufacturers, telling about all the undesirable things (mostly inductances) when working under high voltage and high current.
At the moment I'm still reconsidering the power stage and I will probably add some components to get more protections about all the bad things comming from inductances.
Also the motor I'm driving is a disc rotor type, perhaps it has some special particularities (for example, there was a 5 mH inductance in serie whith it when it was drived via the original circuit using thyristors. When using the HP UHU, it wasn't turning without that inductor. Using the YAPSC it can turn with or without that inductor...???)
As I'm not a professionnal in electronic it might be perhaps time (and components) consumming.
Anyway, I find all that very interesting and I hope It willl be successfull sometime.
Anyway, I'll post on a new thread (because it"s no more a UHU HP but a YAPSC based board) about the results and the schematics if I 'm being successfull of course.
Regards.

[tenmetalman]

Sorry to hear of your continued trials & tribulations. being a trouble magnet myself I know how it is.......... if my mill doesn't eat some part/parts on it's own, I seem to short something out and ................ be sure and let me know how to get to your new thread if you don't mind. good luck, keep plugging, you will have success in the end.
Paul