Re: Aluminum magnet wire?
> Original Poster: "The Flavored Coffee Guy" <elgersmad-at-msn-dot-com>
> That is aluminum alloy, and Nickel, cobol, aluminum makes a
> permenant magnet. I checked, and all of the wire is alloy aluminum.
> Not plain old aluminum.
My reel of wire isn't attracted to magnets. Neither is any of the
aluminium plate I have lying around.
> >James and all,
> >Interesting speculation, James... but your "repulsion" theory would
> >actually mean that copper was a very dangerous conductor! :^)
> >In reality, it's diamagnetic materials that are slightly repelled by
> >a magnet. Paramagnetic materials are slightly attracted to a magnet.
> >And, it turns out that copper is slightly diamagnetic(!), while
> >aluminum is slightly paramagnetic. In reality, these effects are
> >quite small, and these properties really have NO bearing on the
> >behavior of these materials when used as magnet wire. Using aluminum
> >magnet wire is certainly not dangerous, and it can be an inexpensive
> >alternative to copper magnet wire.
> >Aluminum magnet wire is extensively used to reduce cost and weight in
> >many transformers, including some utility distribution transformers.
> >It's also used extensively in the power utility industry for
> >transmission lines. By increasing the diameter of the aluminum
> >conductor to compensate for its poorer electrical conductivity,
> >utilities end up with a transmission line having a lower electrical
> >loss than copper for an equivalent wieght per unit length. In fact,
> >some less expensive [read el-cheapo...] NST's use aluminum magnet
> >wire - not because it performs better, but simply because it's
> >Because the electrical conductivity of aluminum is only about 61%
> >that of copper, the DC and AC resistance will be higher for an
> >aluminum conductor of the same size. Also, skin depth of a conductor
> >is actually a function of the _magnetic_ permeability and electrical
> >conductivity of the conductor. For copper and aluminum, the relative
> >permeability is very close to being 1, and aluminum magnet wire will
> >work fine for your secondary (although copper or silver would perform
> >slightly better). However, DON'T try winding your secondary using
> >ferromagnetic steel or iron wire... :^)
> >-- Bert --
> >Tesla List wrote:
> >> Original Poster: "The Flavored Coffee Guy" <elgersmad-at-msn-dot-com>
> >> That is very dangerous because, aluminum is paramagnetic, and
> >> it
> >> presents the opposing magnetic field to a changing magnetic field.
> >> I wouldn't say that was a good experiment for a novice at all.
> >> Unless, you have years of experiance, don't do it.
> >> James.
> >> -----Original Message-----
> >> From: Tesla List <tesla-at-pupman-dot-com>
> >> To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
> >> Date: Thursday, September 16, 1999 4:04 AM
> >> Subject: Aluminum magnet wire?
> >> >Original Poster: Aric_C_Rothman-at-email.whirlpool-dot-com
> >> >
> >> > Is aluminum magnet wire an acceptable substitute for copper
> >> > magnet wire in a secondary?
> >> >
> >> > Aric
> >> >
> >> >