RE; voltage clamp [RE-wrenches]
Darryl Thayer
daryl_solar at yahoo.com
Thu Jan 1 09:49:32 PST 2004
Thanks Hugh
I will contact the Holland group.
However the PWM is not as elegent as the DC to DC
transformer in the MX60 as I get more power to the
battery this way. ?Am I correct?
I also recived an off group note from Solar Converters
saying they can do it also, however there unit is
limited to about 12 amps. I need a each unit to be
about 4000 watts or 33 amps, as I have a peak of
12,500 watts from all legs. I have used the MX up to
about 3600 watts and was thinking I could throw away
anything above 3600 watts per leg.
Your point about the MX not liking the single phase
ripple is a good note. I have been told the MX does
not like being paralleled on the input.
So it might be back to the drawing board.
Thanks again.
Daryl
--- Hugh Piggott <hugh at scoraigwind.co.uk> wrote:
> Daryl,
> >
> >it is a field type 3 phase AC, the field controller
> is
> >lost, It is set to operate off a resistor from the
> >armature to the field.
> >
> >The frequency output is from 10 to 40 Hz.
> >
> >I was planning on using a full wave rectifier and
> >putting each leg into a DC to DC converter, ie the
> >MX60. From there to a battery set and three
> GVFX3648
> >inverters.
>
> My instinct is that the Mx60 would prefer a smoother
> DC as produced
> by all three phases and would not like the single
> phase output from
> one leg, but I could be wrong. I would use a three
> phase rectifier
> arrangement. But maybe this would mean you have to
> parallel the
> MX60s, and maybe that is not such a good idea?
>
> >
> >The field control seems hard to do.
>
> It would seem like an elegant solution if it can be
> done fast enough.
>
> On the original subject, you can get a suitable
> voltage clamping PWM
> controller from stroomwerk in holland. "dirk.elzinga
> / Stroomwerk"
> <dirk.elzinga at stroomwerk.nl>
>
> I am not sure how it would like the 48 volt battery
> in the dump circuit though.
> --
> Hugh
>
> http://www.scoraigwind.co.uk/
>
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