alt.energy.renewable

On Mon, 10 Sep 2007 09:56:10 +0100, Eeyore
wrote:

>
>
>BobG wrote:
>
>> Eeyore wrote:
>> > Depends how high you want to go.
>> >
>> > If the frequency drops seriously below the specified operating frequency the
>> > core will simply saturate and worst case, the primary circuit will burn out due
>> > to the resulting over-current.
>> ====================================================
>> Come on. I wanted to know how hi a freq a 60hz transformer can take,
>
>It varies. There's no hard and fast rule. It's construction dependent as well.
>Toroids do better at high frequency fwiw.
>
>Graham
>

When you put too high a frequency into an Iron Cored Power Transformer
all that happens is the the efficiency of the Transformer plummets.
The Secondary voltage will fall and the regulation will be poor.
You wont damage the transformer though.
Hi frequency power transformers are made usually of ferrite, are much
smaller than an iron cored transformer of the same power rating and
have a differant turns per volt.
Power Transformers are designed for maximum efficiency as you want as
much of the power fed in , to appear at the output, hence why they are
designed for a specific frequency.
A Windmill connected to an Iron Cored Power Transformer wont work very
well at all,as at low RPM , the transformer will look like a short
circuit and heavily load the Windmill.
All you will do is heat up the primary transformer windings and at
worst case burn them out.
Above the designed frequency, the Transformer will work, but its
effiency will fall,so you wont get the full power capability of the
windmill fed thru to the Secondary.