On 18.06.15 11:03, Gene Heskett wrote: > The isolation tranny has not arrived yet, thats 56 lbs crated & I've not > piled all the motor psu stuff in one stack yet to see how big a box I'll > need to build. Thats a monster toroid, and I'm of a mind to remove a few > turns of the secondary as I expect 130 vdc is more than enough to smoke > that 750 watt motor.
Gene, one thing I've done to drop a toroid's voltage without having to hack at the insulation, is to wind a dozen extra turns of insulated wire through the core, and wind it to buck the secondary. That didn't cover enough of the surface to keep a lot of heat in, and the increase in I^^2R losses didn't amount to much. If your higher output beast runs too warm like that, then the technique can at least serve for checking in advance how many turns to remove. Just a thought. Erik ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
