Square magnet wire for inductors?

Raoul · 14th July 2005, 06:36 AM

Can inductors be wound from square magnet wire?

AndrewT · 14th July 2005, 07:00 AM

Hi,
yes and also edge wound rectangular wire.
Q. How do you stop the square wire deforming into a trapezium like shape as you bend it around the former? The width at the outer radius will be less than the width at the inner radius.

Coolin · 14th July 2005, 07:02 AM

sure !

It might work better too.

But where to get this wire?

Coolin · 14th July 2005, 07:08 AM

Sure square will deform but so will round

Magura · 14th July 2005, 10:09 AM

Quote:

Originally posted by Coolin

But where to get this wire?

I all my magnet wire from synflex. Best quality, best customers support and fair pricing.

Magura

Sch3mat1c · 14th July 2005, 02:50 PM

Square, rectangular and flat wire are wonderful when you have to carry 50+ amperes in a limited core space. You building a linear computer power supply perhaps? Spot welder? Would love to see progress.

Tim

Magura · 14th July 2005, 02:58 PM

Well, for round wire the party ends around 2.8-3.0mm2 wire, then it simply turns too hard to deal with. Bigger than that is a rectangular wire or winding machine job.

Magura

Raoul · 14th July 2005, 08:02 PM

Quote:

But where to get this wire?

I run into square magnet wire at surplus houses every now and then. I couldn't think of a reason why it shouldn't be used, but have never seen inductors/ coils turned from square wire. You would think that somewhere there would be an audio company touting the virtues and superior sound of their "square wire inductors". Guess the snake oil guys missed a spot...

Thanks for the replies, guys.

sam9 · 14th July 2005, 08:33 PM

I first heard of square wire about 30 years ago when I worked fora company that was developing superconductiong electromagnets. Winding it required some special equipment to keep it from twisting as it was wound. The main reason for using it was to increase the surface to volume ratio.

AndrewT · 14th July 2005, 11:06 PM

Hi,
square and rectangular wire are used to maximise the copper area (reduce resistance) within a minimum magnetic gap width (maximise the gap flux). Both of these lead to an increase in efficiency and improves other attributes.

These advantages do not carry over directly to inductors although a small increase in Q will result. A better method of increasing Q is to adopt a square format for the windings using a core diameter of about 2.5 times the coil height and width ( but almost everyone recommends a long single layer coil which nescesarily has more resistance).

14th July 2005, 06:36 AM	#1
Raoul diyAudio Member Join Date: Feb 2003 Location: OR	Square magnet wire for inductors? Can inductors be wound from square magnet wire?

14th July 2005, 02:50 PM	#6
Sch3mat1c diyAudio Member Join Date: Jan 2003 Location: Milwaukee, WI	Square, rectangular and flat wire are wonderful when you have to carry 50+ amperes in a limited core space. You building a linear computer power supply perhaps? Spot welder? Would love to see progress. Tim __________________ Seven Transistor Labs Projects and Resources

14th July 2005, 02:58 PM	#7
Magura diyAudio Member Join Date: Oct 2003 Location: Denmark, Viborg	Well, for round wire the party ends around 2.8-3.0mm2 wire, then it simply turns too hard to deal with. Bigger than that is a rectangular wire or winding machine job. Magura __________________ Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com

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14th July 2005, 07:00 AM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, yes and also edge wound rectangular wire. Q. How do you stop the square wire deforming into a trapezium like shape as you bend it around the former? The width at the outer radius will be less than the width at the inner radius.

14th July 2005, 07:02 AM	#3
Coolin diyAudio Member Join Date: Apr 2003 Location: Holland	sure ! It might work better too. But where to get this wire?

14th July 2005, 07:08 AM	#4
Coolin diyAudio Member Join Date: Apr 2003 Location: Holland	Sure square will deform but so will round

14th July 2005, 08:33 PM	#9
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	I first heard of square wire about 30 years ago when I worked fora company that was developing superconductiong electromagnets. Winding it required some special equipment to keep it from twisting as it was wound. The main reason for using it was to increase the surface to volume ratio.

14th July 2005, 11:06 PM	#10
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, square and rectangular wire are used to maximise the copper area (reduce resistance) within a minimum magnetic gap width (maximise the gap flux). Both of these lead to an increase in efficiency and improves other attributes. These advantages do not carry over directly to inductors although a small increase in Q will result. A better method of increasing Q is to adopt a square format for the windings using a core diameter of about 2.5 times the coil height and width ( but almost everyone recommends a long single layer coil which nescesarily has more resistance).

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