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From: email@example.com (Glen Walpert)
Subject: Re: why there is "Round coil" transformer? what is the difference
between ordinary one with "E" iron and "round coil" type?
X-Newsreader: News Xpress 2.01
Date: Wed, 15 Jan 2003 22:24:15 GMT
NNTP-Posting-Date: Wed, 15 Jan 2003 17:24:15 EST
Organization: Net Access (netaxs.com)
In article , Lizard Blizzard wrote:
>> why there is "Round coil" transformer? what is the difference between
>> ordinary one with "E" iron and "round coil" type?
>If you're talking about toroid transformers, the magnetic field is
>contained in a more even field, with less leakage. And if you're
>building a low profile enclosure, the toroid is usually much flatter and
>will fit into an enclosure that's half as high.
If you are talking about the new round cross section laminated iron cores made
by stacking laminations of varying width (sorry I forget the mfgr), then the
main advantage is you can make a turn of wire around a given volume of iron
with less wire, thus less copper loss. There is also less strain on the wire
insulation from elimination of sharp bends on the corners, and an associated
reduction in the insulation required between windings and core (per the mfgr).
Supposedly the reduced costs of winding and insulation offsets the higher
cost of the cores (again per the mfgr).
chg not -> net to reply
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