Michael K Johnson via EV wrote:
Cor,
How many turns did you wind? I'm assuming you removed the center
portion of the EI in order to get a rectangular shape?
Yes, you need to remove the magnetic shunts. These are rectangular
blocks of laminations tack-welded into the space between the primary and
secondary. This restores the core to a normal E-I laminated stack.
Since the wire will be carrying 100s of amps, it needs to be very thick.
It's hard to wind such thick wire. A better alternative is to use many
smaller strands in parallel. Or, use a long strip of sheet copper
flashing. Put a paper "cuff" around it, or tape or other insulation. The
voltage per turn is low, so not much insulation is needed between turns.
As Cor mentioned, there needs to be a gap in the core so it won't
saturate on DC. This is usually done by putting all the E's in one
stack, all the I's in a separate stack, and putting a thin paper or
cardboard shim between the E's and I's.
--
You never change things by fighting the existing reality. To change
something, build a new model that makes the existing model obsolete.
-- R. Buckminster Fuller
--
Lee Hart's EV projects are at http://www.sunrise-ev.com/LeesEVs.htm
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