Transformer insulateing tape?
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From: BarnCat on 19 Jun 2010 16:01 On Sat, 19 Jun 2010 15:35:39 -0400, Hammy <spam(a)spam.com> wrote: > >Scotch� Premium Vinyl Electrical Tape 88-Super No! NOT vinyl. POLYMER. for high temp, high voltage, and flammability reasons. Let alone the 1 mil thickness (even 0.5mil is available)
From: Copacetic on 19 Jun 2010 16:06 On Sat, 19 Jun 2010 15:53:37 -0400, Neon John <no(a)never.com> wrote: >On Sat, 19 Jun 2010 12:50:40 -0400, Hammy <spam(a)spam.com> wrote: > >> >>What kind of tape can you use for insulation between primary to >>secondary of flyback transformer. I know mass produced professional >>designs use a 3M specialty tape. What I'm looking for is a tape I >>could pick up at Staples or some office supply store or hardware >>store. > >You can get the correct polyester (mylar) tape from McMaster-Carr. Go >to http://www.mcmaster.com and search for product #77075A23. > >John Mylar works, but is not the only "correct" tape for this purpose. Hell, even the right paper can be used. Nomex comes to mind: http://www.alibaba.com/showroom/nomex-insulating-paper.html http://www.eis-inc.com/suppliers/dupontnomex/default.html
From: Bill Sloman on 19 Jun 2010 17:18 On Jun 19, 6:50 pm, Hammy <s...(a)spam.com> wrote: > What kind of tape can you use for insulation between primary to > secondary of flyback transformer. I know mass produced professional > designs use a 3M specialty tape. What I'm looking for is a tape I > could pick up at Staples or some office supply store or hardware > store. > > The vinyl electrical tape I can find is only rated for 600V and 80C > MAX TEMP. > > Is there a commonly available tape that is good for higher temp and > offers higher insulation? I've read of people using a mylar tape is > there a brand name ,type anyone could recommend? > > This is for a 90 - 140Vac input flyback. As has been mentioned here, 3M's yellow polyester film is popular. Farnell/Newark stocks it in three widths - 12mm, 19mm and 25mm. You can order a sinle 66 metre roll for a couple of dollars. The Farnell order codes are 726-977, 753-002 and 753-014. If I remember rightly, the tape is 60 micron thick. -- Bill Sloman, Nijmegen
From: Archimedes' Lever on 19 Jun 2010 18:22 On Sat, 19 Jun 2010 14:18:46 -0700 (PDT), Bill Sloman <bill.sloman(a)ieee.org> wrote: >On Jun 19, 6:50�pm, Hammy <s...(a)spam.com> wrote: >> What kind of tape can you use for insulation between primary to >> secondary of flyback transformer. I know mass produced professional >> designs use a 3M specialty tape. What I'm looking for is a tape I >> could pick up at Staples or some office supply store or hardware >> store. >> >> The vinyl electrical tape I can find is only rated for 600V and 80C >> MAX TEMP. >> >> Is there a commonly available tape that is good for higher temp and >> offers higher insulation? I've read of people using a mylar tape is >> there a brand name ,type anyone could recommend? >> >> This is for a 90 - 140Vac input flyback. > >As has been mentioned here, 3M's yellow polyester film is popular. > >Farnell/Newark stocks it in three widths - 12mm, 19mm and 25mm. You >can order a sinle 66 metre roll for a couple of dollars. The Farnell >order codes are 726-977, 753-002 and 753-014. I already posted the Farnell links, oh, great idiot that never reads the goddamned thread. > >If I remember rightly, the tape is 60 micron thick. Folks around this industry use mils to describe thicknesses. Especially on things like tapes and films. Granted microns can be used, but it has a lot less familiarity among folks, and also a lot less ability to look at something and declare a number. I can do mils fairly accurately, but calling something "1 mil" is a lot easier than trying to tag it with a micron numeric where the margin for error is higher.
From: Cydrome Leader on 19 Jun 2010 18:47
Hammy <spam(a)spam.com> wrote: > > What kind of tape can you use for insulation between primary to > secondary of flyback transformer. I know mass produced professional > designs use a 3M specialty tape. What I'm looking for is a tape I > could pick up at Staples or some office supply store or hardware > store. > > The vinyl electrical tape I can find is only rated for 600V and 80C > MAX TEMP. > > Is there a commonly available tape that is good for higher temp and > offers higher insulation? I've read of people using a mylar tape is > there a brand name ,type anyone could recommend? > > This is for a 90 - 140Vac input flyback. are you making one transformer or many, and if so, are you using a coil form? |