On Wed, 2009-05-20 at 11:27 -0500, Mark Rages wrote: > On Wed, May 20, 2009 at 11:16 AM, Levente Kovacs <leventel...@gmail.com> > wrote: > > On Wed, 20 May 2009 10:48:53 -0500 > > Mark Rages <markra...@gmail.com> wrote: > > > >> What kind of transient are you trying to simulate? Maybe it would be > >> easier to make a circuit to add the transient to mains power, instead > >> of recreating mains power with an amplifier. > > > > 230V times 100A is something I dont want to even calculate. > > > > -- > > You need a high-current, low-voltage transformer: > > http://www.cooperhandtools.com/brands/CF_Files/model_detail.cfm?upc=037103079480
I'd second the idea of using a transformer, although you'd have to check the resistance of the filaments on those soldering guns to be sure what currents they would actually deliver. You might consider how to get wider bandwidth than the 50/60Hz that these transformers are probably designed for... One option might be to deliberately choose a transformer with a higher voltage rating than you need. (E.g. feed a 240V transformer from 110V). The lower voltage should keep the flux levels in the core down, and (hopefully) help with the bandwidth of the system. It isn't too hard to obtain the required currents from a chunky H-bridge and a suitable PWM generator. It doesn't need a significant power level to achieve, and in my case, I used the resistance + inductance of about 10metres of fat cable as the load. -- Peter Clifton Electrical Engineering Division, Engineering Department, University of Cambridge, 9, JJ Thomson Avenue, Cambridge CB3 0FA Tel: +44 (0)7729 980173 - (No signal in the lab!) _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user