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From: email@example.com (N. Thornton)
Subject: Re: I need circuit diagram to make a filter for my voltage regulator.
Date: 29 Oct 2002 05:13:12 -0800
References: <firstname.lastname@example.org> <email@example.com>
NNTP-Posting-Date: 29 Oct 2002 13:13:13 GMT
Irsya_project@yahoo.com (Irsya) wrote in message news:<firstname.lastname@example.org>...
> email@example.com (N. Thornton) wrote in message news:...
> > Irsya_project@yahoo.com (Irsya) wrote in message news:<firstname.lastname@example.org>...
> > > I have an old voltage regulator. This voltage regulator have very bad
> > > output (if compare with another voltage regulators). I see in the
> > > oscilloscope the wave of this voltage regulator output not really sine
> > > wave and the wave also have harmonics (noise) and voltage transients.
> > > The voltage regulator that i mean have specification as follows :
> > > +) Output voltage and frequency can be adjusted in the range of 100 -
> > > 250 volts and 30 - 80 Hz
> > > +) Output power 500 watts
> > >
> > > If you have circuit diagram, PCB layout and list of components that
> > > needed, please send to me. For all yours assistance and goodness i say
> > > thank a lot of.
> > What load are you driving?
> > Can your regulator handle inductive loads?
> > Would a filter that consumed some power be OK?
> > Regards, NT
> The regulator i use to supply computer as the main load and some
> times i use to supply electric motor. Filter that consume some power
> for me is OK if the power that consumed by filter not to much.
Looks like this is fairly straightforward then. The fact you run a
motor on it shows it can run inductive loads.
A small LC filter would help to clean things up to some extent. PCs
dont worry about waveshape, you'd only want to remove the spikes for
them, so a small filter.
A motor tends to overheat on bad waveforms, so bigger inductor and
bigger caps there.
reg cap: = load
It might be wise to add a surge suppressor on the invertor side of
this too, to absorb some of the spikes the filter could create. They
cost under a dollar from electronic componenet suppliers, and have the
infamous joy of being used in those 'surge suppressor' adapters etc,
which people imagine will protect against lightning, despite all the
Do everything at your own risk, such is life.
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