On Monday 27 November 2017 16:29:02 dave wrote: > Interesting high voltage steppers (3 ph) > > http://www.pcbequipment.com/images/machines/website/23330/Datasheet%20 >Berger%20Lahr%20-%20VRDM%20391050%20LWB.pdf > > 325 V 4 A 4Nm > > IIRC they roll off at about 15 KHz > > Weight ~3.1 Kg 85 mm x 85 mm x 142 mm > > Since hal has three phase these ought to be usable motors. > I took the back off one ... years ago. > Beautifully built German craftsmanship. > > I bought these off ebay years ago; represented as servo motors ... > which they are not. > I just pulled the cover and there are no connections for brake or > encoder and no easy > way to drive from the shaft; so just stepper motors. > > Current ebay prices for the motors are considerably more that I paid. > > Will consider reasonably offers. I have three of them. > > Dave > And where the heck do we get drivers for those? That would need at least a full wave bridge with a capacitative input filter to get the DC to power the driver from a single phase 254 volt line such as I have here.
Meaning both rails are hot to earth ground w/o several pounds of isolation transformers interposed. Several pounds, like 40 for the 1/1 toroid I have big enough to do 3 or 4 of those drivers. > > > > ---------------------------------------------------------------------- >-------- Check out the vibrant tech community on one of the world's > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
