On Sun, Feb 28, 2010 at 09:42:55PM -0500, Gene Heskett wrote: > > I can't argue that Steve, having blown one. And that is the reason the > output filter cap in my linear motor power supply is 75,000 uf. Yessiree > Bob, gobble up them overvoltage spikes. ;-) > > And because of the limited out cap size in switcher power supplies, they are > bound to be trouble. The simpler the better, but build it out of bulletproof > stuff, pure analog.
A transorb, with lower voltage tolerance a bit above the top steady state supply voltage, and upper tolerance a bit below the maximum permissible chip voltage, is a great comfort too. It might admittedly necessitate an additional couple of volts headroom, but even 75,000 uf needs headroom to absorb longish high energy spikes. A robust motor driver would have one across the supply, as a minumum, I suggest. You'd want something with tighter tolerances than the old 5Z27 devices floating at the bottom of my junkbox, for lower headroom. Erik -- A computer without Microsoft is like chocolate cake without ketchup! ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
