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Standard isolation transformer lamination dimensions

Started by Unknown December 26, 2015
Could some electronics guru please help ? I am
looking for an URl or online documentation that 
lists the dimensions of commonly available 
isolation transformer lamination dimensions. I 
have visited the Web sites of some companies 
that list details of only their own products
(obviously) but it is not clear if what they 
stste are standard vslues or custom. Thanks 
in advance.
On 2015-12-26, dakupoto@gmail.com <dakupoto@gmail.com> wrote:
> Could some electronics guru please help ? I am > looking for an URl or online documentation that > lists the dimensions of commonly available > isolation transformer lamination dimensions. I > have visited the Web sites of some companies > that list details of only their own products > (obviously) but it is not clear if what they > stste are standard vslues or custom. Thanks > in advance.
maybe look at common spool dimensions, spool will be 4 inside 6 outside 1 deep 3 long Ees will be 6x4 Is 1x6, these ratios are to reduce iron wastage when manufacturing the laminations. -- \_(&#12484;)_
"Jasen Betts" <jasen@xnet.co.nz> wrote in message 
news:n5mr55$ofv$2@gonzo.alcatraz...
> On 2015-12-26, dakupoto@gmail.com <dakupoto@gmail.com> wrote: >> Could some electronics guru please help ? I am >> looking for an URl or online documentation that >> lists the dimensions of commonly available >> isolation transformer lamination dimensions. I >> have visited the Web sites of some companies >> that list details of only their own products >> (obviously) but it is not clear if what they >> stste are standard vslues or custom. Thanks >> in advance. > > maybe look at common spool dimensions, spool will be 4 inside 6 outside 1 > deep 3 long Ees will be 6x4 Is 1x6, these ratios are to reduce iron > wastage when manufacturing the laminations.
http://seventransistorlabs.com/Images/Wasteless.png "A" may be metric or imperial, so take your pick. You'll have to check a catalog to find out standard sizes. For 50/60Hz operation, the thickness per sheet is typically 8-16 thou (0.2-0.4 mm). By the way, the dotted line shows an average magnetic path length somewhat less than (due to the bends being sort of circular) 12A. The cross sectional area is 2A * h (h being the height of the stack). If the E and I shapes are grouped into stacks (rather than being interleaved), and a gap is added between them, then the magnetic air gap length is twice the spacing gap length (because the dotted line passes through it twice). Tim -- Seven Transistor Labs Electrical Engineering Consultation Website: http://seventransistorlabs.com