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Reply-To: "fred bartoli"
From: "fred bartoli"
References: <3DAA0563.9040507@BOGUS.earthlink.net> <email@example.com> <3DAB8531.2090508@BOGUS.earthlink.net>
Subject: Re: My flyback experiment is on the web
Date: Tue, 15 Oct 2002 11:23:54 +0200
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Organization: Guest of ProXad - France
NNTP-Posting-Date: 15 Oct 2002 11:22:26 MEST
Chris Carlen a écrit dans le message :
> Nico Coesel wrote:
> > Strange; I've designed a similar converter (48V in, 168V / 100mA
> > @100kHz) but didn't have problems with the inductors. I've used 2
> > newport power filtering 100uH inductors in series (didn't have 200uH
> > at hand).
> > I see there is also some ringing in your circuit. Did you try to put a
> > small snubber accross the drain and ground? Did you also consider
> > simulating the circuit?
> I have simulated it, but with an ideal inductor and I haven't put the
> IRF730 model in there. Just picked a FET out of a hat. I will try to
> get the right FET model to deal with the output capacitance better, then
> hopefully it will be more accurate. I don't know how to get a
> non-linear magnetic device modelled yet.
Non linearity in magnetics is not that important because you don't want to
run your core into saturation.
Of course you can include it in your simulations and it's very educating as
long as you *gradually* (one after another) add the differents degrees of
non ideality of your components. Doing so allow you to really know what
effects each "parasitics" has, independently of the others. This is a real
nice advantage that simulation has over breadboring ;-)
> Christopher R. Carlen
> Suse 7.3 Linux 2.4.10
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