My transformer is finished. I tested it and it works perfect. 120 VAC input on the primary and 24-0-24 VAC output on the secondary. The lamination saturate about 1200 watts but the winding are rated 360 watts. I only need 320 watts for my project.
I worked the math to determine how many laminations I need so the primary winding will have 200 turns. That made it easy the secondary only needs 80 turns with a center tap.
If I had used 1/2 the laminations saturation at 600 watts then the primary would have needed about 400 turns of wire and the secondary 160 turns of wire there was not enough room for that much wire it the space available. I used laminations from a microwave oven transformer.
I had to make a winding fixture for the lathe and a coil form from cerial box cardboard. It worked out perfect 50 turns on each layer of the primary and 40 turns on each layer of the secondary. Every day I wound a layer then varnished it and let it dry. I have a counter mounted on the lathe to keep track of the number of turns.
Next I made terminals using #12 solid copper wire. I wrapped the coil with fiberglass tap and painted the whole think with varnish. I built 4 aluminum mounting brackets for each corner of the transformer.
I spent more time making the winding fixture and taking the oven transformer apart than I did winding the transformer.
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I worked the math to determine how many laminations I need so the primary winding will have 200 turns. That made it easy the secondary only needs 80 turns with a center tap.
If I had used 1/2 the laminations saturation at 600 watts then the primary would have needed about 400 turns of wire and the secondary 160 turns of wire there was not enough room for that much wire it the space available. I used laminations from a microwave oven transformer.
I had to make a winding fixture for the lathe and a coil form from cerial box cardboard. It worked out perfect 50 turns on each layer of the primary and 40 turns on each layer of the secondary. Every day I wound a layer then varnished it and let it dry. I have a counter mounted on the lathe to keep track of the number of turns.
Next I made terminals using #12 solid copper wire. I wrapped the coil with fiberglass tap and painted the whole think with varnish. I built 4 aluminum mounting brackets for each corner of the transformer.
I spent more time making the winding fixture and taking the oven transformer apart than I did winding the transformer.
**broken link removed**
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