At 10:26 1998-05-20 +0000, you wrote:
>> At 04:39 PM 19/05/98 +0200, you wrote:
>> >...
>> >>  Note that if you do NOT use a transformer, then you will have a
>> >>triangle-type output and will not be able to ground the center point
>> >...
>> >I have distant plans of a small wind power plant.
>> >I have been thinking about a 400V 3-phase generator like this:
>> >DC input is +340VDC, GND/Neutral, and -330VDC
>> >Switching stages are one pair IGBT(or something) for each phase, conecting
>> >to +, -, or both off.
>   ^^^^^^^^^^^^^^^^^^^^ Gulp. What is going to filter that ? Do you know
>what happens if you put an inductive load on such a 'phase' ? Seriously,
>to anyone looking into high power electronics, take a GOOD look at such
>trifle things like 5 % distortion on a 1 kW sinwave (which works out to a
>"mere" 50 Watts turned instantly into HV by any coil impedance in the
>circuit, such as a transformer, and ready to fry any semiconductors in the
>consumer circuits, and send EMI to Australia, China and who knows where
>else in the long wave range ;).
>Peter

A little exaggregation, i presume... It is a question of design.

Actually I have been studying a 48VDC to 230VAC 250W converter I bought
before, that uses the above design.  Works very well.

Im am interested if anyone can describe how theese class 600MW converters
for long distance power lines work.  (Made by ABB (Asea) to transfer power
to other side of seas, from distant power plants etc.  How do they do the
600MW HVDC to AC conversion??

/MOrgan
/  Morgan Olsson, MORGANS REGLERTEKNIK, SE-277 35 KIVIK, Sweden \
\  mrt@iname.com, ph: +46 (0)414 70741; fax +46 (0)414 70331    /