Re: Power Factor Capacitor -- Was -- RE: schematics...AdamSmith's
Tesla List wrote:
> Original Poster: "Bunnykiller" <bigfoo39-at-idt-dot-net>
> > Actually, I've been told that Aluminum Electrolytic will work for a 120VAC
> > PFC cap. These are inexpensive and very common. And to head off criticism
> > that Aluminum electrolytic caps shouldn't be used in an AC circuit, I was
> > told by an Electrical Engineer (Technician?) who runs all the electrical
> > labs here at school. He said that electrolytics can take the AC, just
> > constant negative DC bias.
> > Mark
> hi Mark...
> weird ... several years ago i took a 220 WVDC -at- 3500 uF electrolytic
> cap and placed 120V AC across it guess what happened .... I'll
> never do that again ... it was smelly smokey and LOUD ...
> Scot D
Only way electrolytics will work at all on AC is to connect them in
series opposing (- to - or + to +). Even then the losses will be high
and the actual capacitance value uncertain and variable. "Motor
starting electrolytics" do just that, but are only good for a few
seconds of operation at a time. Bottom line is that they are NO GOOD AT
ALL for power factor correction, and that they do indeed smell lousy
when they explode.