On Thu, 15 Jan 2004 18:29:25 GMT Gregg wrote:

Behold, larry signalled from keyed 4-1000A filament:

Would they run cooler?....

Depends. If the core is of good quality then they'll run cooler. Eddy
current effects are more pronounced at higher frequencies.

Exactly right. Hysteresys (sp?) losses will go down, but eddy current
losses will go up. For most applications it's not clear that there's
any change in the overall efficiency.

Could anyone foresee any negative effects?....

You may get higher than anticipated secondary voltage.

I don't know why. Where I used to work we used many standard 50/60 Hz
transformers at 400 Hz with no change in output voltage.

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Jim Adney
Madison, WI 53711 USA
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