On Tue, 2011-03-08 at 16:07 -0600, Igor Chudov wrote: > On Tue, Mar 8, 2011 at 4:03 PM, Kirk Wallace > <kwall...@wallacecompany.com>wrote: > > > On Tue, 2011-03-08 at 15:35 -0600, Igor Chudov wrote: > > ... snip > > > You can only have equal voltages l1-l3, l2-l3, l1-l2, at 120 degree phase > > > angles. > > > > With 0, 90, 180, if the L3 peak to peak is higher than L1-L2, then the > > L1-L3 and L2-L3 could be made to equal L1-L2. I seem to recall that the > > converter capacitor size adjusts this, but the phase angle spacing will > > still be the same. > > -- > > > Capacitors do adjust phase angle. > > i
But there is no getting around the fact L1 and L2 are 180 degrees apart. The phase and voltage of the converter's L3 is unanswered. One of my problems is that I have never tried to verify any of this with an oscilloscope. I only have two channels and they are referenced to ground. Making a test seems like it would take some effort and converters generally work fine in practice, so the motivation isn't high enough yet. Thinking more, its just a matter of hooking up the probes to L1 and L3 and seeing what the phase shift is. If I leave the probes unconnected, there is no danger to the scope. Besides the converter should have the same ground. Maybe. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ What You Don't Know About Data Connectivity CAN Hurt You This paper provides an overview of data connectivity, details its effect on application quality, and explores various alternative solutions. http://p.sf.net/sfu/progress-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
