Litz wire - Fact or fiction

[wally7856]

I have tried to buy litz wire and could not find any for sale. I called or emailed every large wire house in the USA and no one has any. Only 2 of the company’s knew anything about litz wire and would make it up for a special order with a minimum around $1500.00 USD.

Do any of the diysmps members have a place to buy litz wire.

 

[MicrosiM]

I have tried to buy litz wire and could not find any for sale. I called or emailed every large wire house in the USA and no one has any. Only 2 of the company’s knew anything about litz wire and would make it up for a special order with a minimum around $1500.00 USD.

Do any of the diysmps members have a place to buy litz wire.

You can buy through ebay, just search for LITZ, and IF I remember there are many companies in USA sells that.

Regards

 

[ultra]

.

Do any of the diysmps members have a place to buy litz wire.

What sort of litz are you looking for?

 

[wally7856]

What sort of litz are you looking for?

I want a small assortment of litz wire for 100khz operation to use with a few hundred watts to a few thousand. Basically i just want to be able to experiment making switching power supplies without paying a fortune for the scraps on Ebay.

 

[codex653]

why don't you make the litz wire yourself? All it really is is just a bunch of twisted strands of smaller wire.

 

[Redwire]

Litz wire here looks good: Surplus Sales of Nebraska

This IEEE paper uses ordinary stranded wire in place of litz wire - but they first stripped the wire and oxidized all the copper strands (200°C oven/10min.) to insulate the strands and make sort of litz wire.
For samples, they used New England Wire Technologies (USA)

Please let us know if you find a good source for litz wire. All the wire shops are custom making stuff and it's crazy expensive.

 

[wally7856]

Redwire, i looked at Surplus sales of Nebraska, besides being all sold out of anything worth while, look at the old prices, up to $2 a foot. Also i had New England wire and cable quote me for 10AWG litz wire, they were 1000FT minimum for $2600 USD, this was about 2 years ago.

 

[wally7856]

why don't you make the litz wire yourself? All it really is is just a bunch of twisted strands of smaller wire.

For 100KHZ you need around 48AWG wire and at least a hundred strands. Plus it has to be specially weave’d.

 

[MicrosiM]

wally7856


See this wire, for 100KHZ

http://www.ebay.com/itm/150547940087?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

 

[wally7856]

wally7856


See this wire, for 100KHZ

http://www.ebay.com/itm/150547940087?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

That wire is good for 1.5 to maybe 2 amps max. A half bridge can only see 1/2 the bus voltage. So this wire on the primary can make a maximum of 170 watts. 170 volt bus, half of that x 2 amps.

 

[MicrosiM]

That wire is good for 1.5 to maybe 2 amps max. A half bridge can only see 1/2 the bus voltage. So this wire on the primary can make a maximum of 170 watts. 170 volt bus, half of that x 2 amps.

Thats true, I gave you an option!

 

[ultra]

I want a small assortment of litz wire for 100khz operation to use with a few hundred watts to a few thousand. Basically i just want to be able to experiment making switching power supplies without paying a fortune for the scraps on Ebay.

I do carry AWG36/130 and AWG38/100 if you are interested, just let me know.

 

[codex653]

For 100KHZ you need around 48AWG wire and at least a hundred strands. Plus it has to be specially weave’d.

and? what about that even remotely sounds hard to make yourself? hahaha...i see your point

 

[wally7856]

and? what about that even remotely sounds hard to make yourself? hahaha...i see your point

Oops, I should have said 38AWG not 48AWG for 100Khz.

 

[wally7856]

I do carry AWG36/130 and AWG38/100 if you are interested, just let me know.

How much do you sell the AWG38/100 for.

 

[MicrosiM]

wally7856


Wire I gave you is 1.27 mm outer diameter, how come its going to handle 2 AMPs?

Scroll down this page and see other options


http://www.ebay.com/itm/150547940087?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649


you have : 660/46 (0.04 mm) Litz Wire, single layer nylon insulation, 1.76 mm diameter.

50/32 (0.20 mm) Litz Wire, double layer nylon insulation, 2.10 mm diameter.

 

[ultra]

How much do you sell the AWG38/100 for.

How much do you need? Its 155oC solderable, and the serving is cotton.

 

[wally7856]

MicrosiM said.

“Wire I gave you is 1.27 mm outer diameter, how come its going to handle 2 Amps?”

litz wire 105/40
40awg = .0031" Dia. x 1000 = 3.1mils
3.1mils x 3.1mils = 9.61CM / 500CM/A = .01922 amps per strand x 105 = 2.0181 amps


“Scroll down this page and see other options

http://www.ebay.com/itm/150547940087...84.m1555.l2649

you have : 660/46 (0.04 mm) Litz Wire, single layer nylon insulation, 1.76 mm diameter.
50/32 (0.20 mm) Litz Wire, double layer nylon insulation, 2.10 mm diameter.”

32AWG litz wire is not even good enough for 20Khz.

litz wire 660/46
46awg = .00157" Dia. x 1000 = 1.57mils
1.57mils x 1.57mils = 2.4649CM
2.4649CM / 500CM/A = .0049298A x 660 strands = 3.25A

There is no wright answer for how much current a wire can carry. It depends on what you design for. For continues operation, the following is general guidelines for transformer design.

350CM/A - Very poor. Transformer runs hot at full load.
500CM/A - Good design.
650CM/A - Very conservative. Transformer stays cool at full load.

For audio you can probably get away with the 350CM/A end. I am mostly concerned with making a general power supply so i use 500CM/A as a starting point.


So in the first example of 105/40 at 500CM/A = 2.02A, lets see what 350CM/A comes out as.

litz wire 105/40
40awg = .0031" Dia. x 1000 = 3.1mils
3.1mils x 3.1mils = 9.61CM / 350CM/A = .02745 amps per strand x 105 = 2.88 amps

 

[wally7856]

How much do you need? Its 155oC solderable, and the serving is cotton.

100Ft would be nice.

 

[ultra]

100Ft would be nice.

Is $50 ok, including shipping to US ?