Yves Monmagnon wrote:

Hi ! Pat!
"Patrick Turner" wrote in message
...

I just wind my own E&I trannies.
It does mean I have to buy at least 50Kg of core material at
a time, but the GOSS I get is extremely good low loss material,
and has losses almost identical to good toroidals.
At 0.8 Tesla, the iron U is 17,000.

Measured up to 25,000 at this induction value and around 6000 at 1.4T !

Glory day for Lance today !

I think Lance's fall cost him 30 secs, and he needs that buffer before the time
trial.
But man, what a ride he put in today!

Maybe he wins it next year too!

GOSS can have a high U as you suggest, but 17,000 for E&I
is really good compared to say NOSS, or plain grade iron at 3,500.

1.4T is too high, far better to run at 0.8T, always, and
use a core rated for 2.5 times the actual power needed,
and then make the windings have no more than 2.5 amps/sq.mm.
Then the regulation is OK, and it runs cool, and can take
otherwise disastrous overloads.
Forget bean counter designing, its all BS!

Patrick Turner.


Yves

Plitron make good toroidals. No need to wind one's own if you really want
a
toroid.

Patrick Turner.