Power transformer design question
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- gui_tarzan
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Power transformer design question
Why do the windings have square bobbins? Why not use round bobbins? It seems it would be a whole lot easier to wind them. Yes, this is a serious question.
--Jim
"He's like a new set of strings, he just needs to be stretched a bit."
"He's like a new set of strings, he just needs to be stretched a bit."
Just a guess
Likely it was easier to manufacture the square plate E sections; Less waste material. A circular cutter would be harder to sharpen and keep sharp back then. That's what I think.
silverfox
silverfox
Re: Power transformer design question
Because the laminates are shaped like an E that are slid in from both side of the bobbin. If the bobbin was round, the shape of the laminate would have to change as they move off of the hole axis, resulting in extra laminate tooling and complexity assembling. The square bobbin and flat laminates can be assembled tightly with minimum spacing for best efficiency.
Re: Power transformer design question
Google "R core" transformers. They have been around a long time and are more efficient than your standard E I core tranny. I haven't done a lot of research, but they look to be easier to wind. They come in sort of a humbucking configuration.
I Think I Think Too Much !
Re: Power transformer design question
Or "C" core trannies.
Tube junkie that aspires to become a tri-state bidirectional buss driver.
Re: Power transformer design question
Standard procedure to build a transformer core (which is EI) starts with such shapes punched out of flat sheet.
Since all EI are the same size, stacking them creates a rectangular core.
A Toroid or a C core still have a rectangular core, because they are made by winding a silicon steel ribbon; obviously making it constant width is the cheapest most efficient way.
Since all EI are the same size, stacking them creates a rectangular core.
A Toroid or a C core still have a rectangular core, because they are made by winding a silicon steel ribbon; obviously making it constant width is the cheapest most efficient way.