I have a shunt circuit on the 105VDC supply for that. I could build up another one of those PC boards to do it for a higher voltage supply. But is it all worth it for one motor that does not match the data sheet winding resistance and shows up with problems.
John > -----Original Message----- > From: John Figie [mailto:zephyr9...@gmail.com] > Sent: September-19-21 12:14 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] DC Servo issues > > John Figie > > > On Sun, Sep 19, 2021 at 2:07 PM John Dammeyer <jo...@autoartisans.com> > wrote: > > > > > > > That's the question. One possibility to try is to grab 110VAC line > > voltage. Put a bridge and caps on it and drive that motor with more than > > the 105VDC power supply. I'll have to check if my transistors are rated > > for the 165VDC rectified voltage and I really would rather have them be > > 250V transitors. > > > I think you will need the 250V transistors and also need to consider a > shunt resistor and switch to keep the bus voltage from going too high when > you rapidly decelerate a motor. > > > > And then there's the filters on the board too. The UHU circuit was > > originally for up to about 75V. The HP_UHU came about for higher voltage > > drives; Just don't know if I built mine for more than 125VDC although the > > circuit design parts are for 11A. > > > > I _have_ tried one these motors with the STMBL but could never get it > > tuned and support from the designers was inadequate to help me so I gave > > up. > > > > I'd rather be machining... > > > > John > > > > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
