On Tuesday 01 April 2008, Roland Jollivet wrote: >I'm sure this will fit the bill > >http://www.national.com/pf/LM/LME49811.html > > >Regards >Roland
As a driver for the high power analog stages yes, but note that its forte is a 200 volt output swing, at only 9 milliamps of output, so to continue from my other message, the end result, given a sufficiently robust output stage for it to drive, would be something very badly in need of heavy duty, noisy, cooling. A 29 db rated muffin fan could cool quite a few of those gizmo's from Ramsey. All we need are motors that run at full song on a 40 volt peak to peak drive. The question then becomes, are such motors available? I do not know without googling. We can switch many tens of amps of current on and off with little power loss with the right devices today. To do analog control of that much voltage and current would lose 80% of the input power in the devices that would need to get rid of 2kw worth of heat for a 500 watt motor drive, and the devices have to be 100 times as rugged. That doesn't make sense today when a class D circuit can do this 500 watt motor with maybe 10 watts of heat loss, and probably, because it doesn't run that hot, 10x as dependable as the analog version. [...] -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Don't confuse things that need action with those that take care of themselves. ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
