Malcolm Nixon wrote: > On Fri, 13 Jul 2007 15:44:10 +0100, "STRUDWICK.FAMILY" > <[EMAIL PROTECTED]> wrote: > >> Barry >> >> The reason that the toothbrush doesn't work any more is that because >> of all the jaggedy bit (also known as harmonics) cause the coil in >> the base to get hotter than it is designed to get and it melts. >> Other units can get hotter on a inverter supply than they would on a >> household supply but in general this is not a major problem. >> >> Paul > > But if the output of the invertor was fed through a 1:1 transformer, > this would remove some of the harmonics - but would it be enough I > wonder ?.
Well it might. There's also the consideration of voltage - A standard "240V" mains is actually the "root mean squared", the top of the sine wave is at around 315V IIRC, who knows what the peak voles are with a non standard wave. Ron Jones Process Safety & Development Specialist Don't repeat history, unreported chemical lab/plant near misses at http://www.crhf.org.uk Only two things are certain: The universe and human stupidity; and I'm not certain about the universe. ~ Albert Einstein
