Dear Jim,
The only thing I can discuss
of the MEG is the theory of its operation. Actual construction of the
MEG that we use, is still held "Company confidential".
But I do wish you well in
your research efforts. My best tip is to forget so much about the flux
switching, and concentrate on the Aharonov-Bohm effect.
Best wishes,
Tom Bearden
Hi, Tom:
I've gotten back to work on my MEG project
and suspect a "core saturation" problem due to the neodymium PM that
I'm using. It is a 1" x 2" x 1.375" (No. to So.) magnet that has a
reported flux of 5350 gauss. I'm unsure whether this number is per
square inch, as cited in some literature, or per square cm., as cited
elsewhere. If it is the second, the total gauss level is 69,000, or
6.9 tesla. The literature for the Powerlite Core that I'm using
states that 1.6 tesla is its saturation level. If you would
straighten me out on this I'd be grateful.
I'm driving the MEG with a pulse generator
built as shown on the Naudin Website, using two 18 turn input coils,
and four output coils, two with 40 turns and two with 200 turns. I've
found that the output power reaches a maximum and nearly equals the
input power if I load these outputs with 720 and 18,000 ohm carbon
resistors, respectively, and is in the range of 5.5 watts per output
coil. I've also found that I get about 10 % more output at an
operating frequency of about 50 khz.
With 24.5 watts input, and allowing 1.5
watts for the pulse generator, the input to each of the two input
coils is about 11.5 watts at 25.3 volts, for a driving current of
about 0.45 amperes, and an ampere-turns product of 8. I cannot
imagine that this drive could appreciably affect the core saturation,
but can see where, if the core is totally swamped, there'd be no
possibility of the PM flux being switched. Despite this, I still seem
to have an efficient multiple input/output transformer.
I hope you can comment on this without
running afoul your "Confidentiality Agreement".
I also hope you are well and that your MEG
project is moving along.
I'd love to trade in my woodstove for a
2.5 kw MEG for this winter. My woodpile is running low and the price
of electricity seems destined to climb.
Jim
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