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Registered Member #3114
Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
i have a flyback transformer core an wanted to make my own windings and i read some where that there is a ration, and was wondering what i would have to do to insulate it.
Registered Member #834
Joined: Tue Jun 12 2007, 10:57PM
Location: Brazil
Posts: 644
Insulation is the big problem. The whole winding must be encapsulated in insulating material, as wax or mineral oil, for good insulation, and the winding layers must be separated by insulating layers. Waxed paper is usually enough. Interesting project if want to learn how to do it, but it will be difficult to obtain something better than a commercial unit.
Registered Member #2838
Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333
It is possible to wind your own secondary. As already suggested here I have read that you will need at least 500-1000 turns for decent results. However I would recommend more unless you want to produce lower voltage higher current arcs. Find a small thin piece of tubing (plastic/cardboard/paper) that you can slide the core into and wind the wire on the tubing. It will make your life much easier. I would recommend somewhere around 32awg or thinner. Also every homemade flyback secondary that i have seen used fewer and fewer turns for each layer of windings for capacitance. In my understanding it will be similar to rolling your own capacitors but you will be using layers of wire rather than sheets of foil. Here are a few youtube videos that may be helpful or at least give you a few ideas... (this one didn't turn out well due to poor insullation also possibly air between layers. Notice the corona in the secondary between arcs) (decent explanation of construction about half way through the video) (400 turns, hot arcs) (I threw this one in here because it has to be one of the biggest ferrite cores i have ever seen) (4hv thread about winding secondary)
There is also some good information here. (Inductor and Flyback transformer design pdf) (Good information/calculators at bottom of page) (flyback design calculator)
Lots of good information out there. You may have to do some searching online.
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winding a secondary on a flyback core
