On Wed, Apr 6, 2011 at 8:51 AM, andy pugh <bodge...@gmail.com> wrote:
> On 6 April 2011 14:31, Igor Chudov <ichu...@gmail.com> wrote: > > normally people discharge caps through a resistor only. > > In that case, what would be the normal discharge time? Last time I did > the calculations it looked like a permanently-connected resistor > needed to be rated at several tens of watts to not melt during normal > running. > (1 s discharge = 100W, 10s, discharge 10W) > > I built a power supply and I discharge something like 2-3 watts continuously, through a resistor that is rated for more than that amount. It is hot to touch, though it does not quite burn my skin if touched. Resistors are cheap and a good thing about having a passive bleeder only system, is that essentially nothing can go wrong with it. All motor drives that I took apart have a bleed resistor. i ------------------------------------------------------------------------------ Xperia(TM) PLAY It's a major breakthrough. An authentic gaming smartphone on the nation's most reliable network. And it wants your games. http://p.sf.net/sfu/verizon-sfdev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
