Help winding my own inductor?

[John Fields]

On Sun, 21 Dec 2003 06:51:07 -0800, DarkMatter
<DarkMatter@thebarattheendoftheuniverse.org> wrote:

On Sun, 21 Dec 2003 08:27:36 +0000, John Woodgate
jmw@jmwa.demon.contraspam.yuk> Gave us:


Absolutely not. That's 'wave winding'.

That isn't the proper term for that either.

The term "helical wound" seems to pop to the surface of my ravaged
mind.

---
Apparently a great deal of what pops up to the surface of that cesspool
you call a mind is what one would expect to see floating around on its
surface...

"Wave winding" may very well be the proper right-pondian term for what
it's called over here: "universal" winding, sometimes called "pie
winding" if the diameter of the winding is large compared to its length.
Sometimes there are several pie sections wound on the same former, and
these are also commonly referred to as pie wound chokes.

--
John Fields

 

[John Popelish]

John Woodgate wrote:

I read in sci.electronics.design that John Popelish <jpopelish@rica.net
wrote (in <3FE6DF82.4343BCE8@rica.net&gt about 'Help winding my own
inductor?', on Mon, 22 Dec 2003:

Does this answer contradict your last one?

I said, "How about if you adjust the gap to hold a constant flux for a
given
current as you change the number of turns?"

And you answered, "Then the inductance is *independent* of the number
of turns, by the definition of inductance (induction per unit
current)."

Yes. I misread your question to mean keeping N[phi] constant.

Thanks for the help. It makes a lot more sense, now.

--
John Popelish

 

[DarkMatter]

On Mon, 22 Dec 2003 11:33:16 -0600, John Fields
<jfields@austininstruments.com> Gave us:

Apparently a great deal of what pops...

Fuck you, jackoff.

 

[DaveC]

Guys, guys, guys!

If you feed the trolls, they come back for more.

Let's stop playing "I'm righer". It's obvious who's got the wisdom that comes
from years of experience. You've made your statements. Let the jury of your
peers (and we beginners, too) retire in peace to ponder the evidence.

Peace,
--
DaveC
me@privacy.net
This is an invalid return address
Please reply in the news group

 

[DarkMatter]

On Sun, 21 Dec 2003 13:30:56 -0600, John Fields
<jfields@austininstruments.com> Gave us:

and before
you got called on it you thought that any number of paralled conductors
was referred to as Litz wire, as evidenced from your misuse of the term.

Not true. They must be isolated from each other electrically,
except at the terminations. I said that. I know WAY more about it
than you do.

 

[DarkMatter]

On Sun, 21 Dec 2003 13:42:53 -0600, John Fields
<jfields@austininstruments.com> Gave us:

LOL! If, when you go to work tomorrow, you hear snickers and giggles
behind your back everywhere you go it'll probably be because your
coworkers read what you've been posting on this thread and won't be able
to help themselves.

Try it... How many #22Ga wire strands does it take to make one 19Ga
wire?

You lose.

 

[John Fields]

On Tue, 23 Dec 2003 04:08:00 -0800, DarkMatter
<DarkMatter@thebarattheendoftheuniverse.org> wrote:

On Sun, 21 Dec 2003 13:42:53 -0600, John Fields
jfields@austininstruments.com> Gave us:

LOL! If, when you go to work tomorrow, you hear snickers and giggles
behind your back everywhere you go it'll probably be because your
coworkers read what you've been posting on this thread and won't be able
to help themselves.


Try it... How many #22Ga wire strands does it take to make one 19Ga
wire?

---
Well, let's see...

One strand of #22 has a cross sectional area of 0.0005046 square inches,
and one strand of #19 has a cross sectional area of 0.001012 square
inches, so 0.001012/0.0005046 = 2.005549 strands ~ 2 strands.

With that in mind, let's take a look at an excerpt of an earlier post of
yours where you claimed that seven strands of #22 is the equivalent of
one strand of #16:

QUOTE

I used 7 #22Ga for just over 16 gauge equivalent. It was about an
inch and a quarter core, and it was like 12 turns.

END QUOTE

Now, taking a look at a wire chart we find that a single strand of #16
has a cross sectional area of 0.002028, so if we divide that by the
cross sectional area of a single strand of #22, we get
0.002028/0.0005046 = 4.019, ~ 4 strands. Not seven, ya fuckin' maroon.

Now, just for grins, if we take your seven strands of #22 and multiply
the cross sectional area of one of them by seven, we'll get
0.0005046 * 7 = 0.003532 square inches. Then, if we search the wire
chart for the wire size with a cross sectional area which most closely
approximates 0.003532 square inches we find that #14, with a cross
sectional area of 0.003225 square inches fills the bill, As I posted
earlier.

Since your seven strands certainly weren't litz wire, that could also
help to explain why the choke you wound with the seven strands of #22
worked when the one you wound with the single strand of #16 didn't.
Simply put, the seven strands represent about a 59% increase in cross
sectional area over that enclosed by a single strand of #16!

You lose.

Convince me some more.
---

--
John Fields

 

[John Fields]

On Tue, 23 Dec 2003 04:04:19 -0800, DarkMatter
<DarkMatter@thebarattheendoftheuniverse.org> wrote:

On Sun, 21 Dec 2003 13:30:56 -0600, John Fields
jfields@austininstruments.com> Gave us:

and before
you got called on it you thought that any number of paralled conductors
was referred to as Litz wire, as evidenced from your misuse of the term.


Not true. They must be isolated from each other electrically,
except at the terminations. I said that. I know WAY more about it
than you do.

---
Since you knew that litz wire was named after Herr Litz, I guess you're
right.

--
John Fields

 

[John Fields]

On Tue, 23 Dec 2003 09:20:15 -0600, John Fields
<jfields@austininstruments.com> wrote:

Simply put, the seven strands represent about a 59% increase in cross
sectional area over that enclosed by a single strand of #16!

---
Which is what you thought you were dealing with. (A #16 equivalent, that
is...)

--
John Fields

 

[Greg Neill]

"John Fields" <jfields@austininstruments.com> wrote in message
news:tgmguv0c99nc5pr9r6iudjor9buf2k068h@4ax.com...

On Tue, 23 Dec 2003 04:08:00 -0800, DarkMatter
DarkMatter@thebarattheendoftheuniverse.org> wrote:

On Sun, 21 Dec 2003 13:42:53 -0600, John Fields
jfields@austininstruments.com> Gave us:

LOL! If, when you go to work tomorrow, you hear snickers and giggles
behind your back everywhere you go it'll probably be because your
coworkers read what you've been posting on this thread and won't be able
to help themselves.


Try it... How many #22Ga wire strands does it take to make one 19Ga
wire?

---
Well, let's see...

One strand of #22 has a cross sectional area of 0.0005046 square inches,
and one strand of #19 has a cross sectional area of 0.001012 square
inches, so 0.001012/0.0005046 = 2.005549 strands ~ 2 strands.

Hmmm. For DC or AC use? If AC, at what frequency? Like beauty,
electricity is sometimes only skin deep.

 

[John Fields]

On Tue, 23 Dec 2003 11:55:08 -0500, "Greg Neill"
<gneillREM@OVE.netcom.ca> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:tgmguv0c99nc5pr9r6iudjor9buf2k068h@4ax.com...

---
Well, let's see...

One strand of #22 has a cross sectional area of 0.0005046 square inches,
and one strand of #19 has a cross sectional area of 0.001012 square
inches, so 0.001012/0.0005046 = 2.005549 strands ~ 2 strands.

Hmmm. For DC or AC use? If AC, at what frequency? Like beauty,
electricity is sometimes only skin deep.

---
Read the fucking thread.

--
John Fields

 

[bushbadee]

Mag Inc uses the curves I developed back in 1960 to determine the energy
storage which they post for each of their moly permaloy cores.
If they have DC in them, that must be taken into account.


"Brian" <Brian@fncwired.com> wrote in message
news:<3FE45E4C.4C2427DA@fncwired.com>...

DaveC wrote:

20 millihenry, 1 amp, 25 KHz. Pot core, I presume. Don't know enough
about
these to know if I need a core with a gap or not. Willing to learn...

I have a 20 mH inductor (off the shelf) but is getting hot with the
current
I'm passing through it.

Where do I start? References and advice welcome.

Thanks,
--
DaveC
me@privacy.net
This is an invalid return address
Please reply in the news group

Using a program we have developed over the years (which will do coils and
core
selections, plus many other things as well). I plugged in your numbers to
come
up with a core size. Take a look at it at
http://www.fncwired.com/CoreExample

As you can see, we could have used a little bit more information. If you
would
like us to change something, let us know and we will enter in the new data
(and
display it for you). This program will also give you all the formulas
used.

The core used is "Magnetics" molypermalloy powder core (MPP core).


--
Building user friendly software for electronics. http://www.fncwired.com

 

[Greg Neill]

"John Fields" <jfields@austininstruments.com> wrote in message
news:fjtguvcjjkf6o2jef56lblb8sf0gtak0ef@4ax.com...

On Tue, 23 Dec 2003 11:55:08 -0500, "Greg Neill"
gneillREM@OVE.netcom.ca> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:tgmguv0c99nc5pr9r6iudjor9buf2k068h@4ax.com...

---
Well, let's see...

One strand of #22 has a cross sectional area of 0.0005046 square
inches,
and one strand of #19 has a cross sectional area of 0.001012 square
inches, so 0.001012/0.0005046 = 2.005549 strands ~ 2 strands.

Hmmm. For DC or AC use? If AC, at what frequency? Like beauty,
electricity is sometimes only skin deep.

---
Read the fucking thread.

Hey, you have a nice day too.

Yikes.

 

[John Fields]

On Tue, 23 Dec 2003 12:35:19 -0500, "Greg Neill"
<gneillREM@OVE.netcom.ca> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:fjtguvcjjkf6o2jef56lblb8sf0gtak0ef@4ax.com...
On Tue, 23 Dec 2003 11:55:08 -0500, "Greg Neill"
gneillREM@OVE.netcom.ca> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:tgmguv0c99nc5pr9r6iudjor9buf2k068h@4ax.com...

---
Well, let's see...

One strand of #22 has a cross sectional area of 0.0005046 square
inches,
and one strand of #19 has a cross sectional area of 0.001012 square
inches, so 0.001012/0.0005046 = 2.005549 strands ~ 2 strands.

Hmmm. For DC or AC use? If AC, at what frequency? Like beauty,
electricity is sometimes only skin deep.

---
Read the fucking thread.

Hey, you have a nice day too.

Yikes.

---
Hey, asshole, if you'd taken a few minutes to check the thread you'd
have found out exactly what was going on and you would have gotten the
answers to one of your questions. But no, you'd rather be an
inconsiderate little prick and have everybody else do your legwork for
you.

Fuck you _and_ your sarcastic "have a nice day" shit.

--
John Fields

 

[Greg Neill]

"John Fields" <jfields@austininstruments.com> wrote in message
news:tc3huvge2976pv7gulvppieblnhtkm90p2@4ax.com...

[Nothing civilized]

<*plonk*>

Thanks for playing.

 

[DarkMatter]

On Tue, 23 Dec 2003 09:20:15 -0600, John Fields
<jfields@austininstruments.com> Gave us:

Then, if we search the wire
chart for the wire size with a cross sectional area which most closely
approximates 0.003532 square inches we find that #14, with a cross
sectional area of 0.003225 square inches fills the bill, As I posted
earlier.

Except that your lame, retarded ass is only looking at even gauges.

Ther are odd gauges, and half gauges, you stupid fuck. 14 is NOT
the nearest gauge.

 

[DarkMatter]

On Tue, 23 Dec 2003 10:28:08 -0600, John Fields
<jfields@austininstruments.com> Gave us:

Since you knew that litz wire was named after Herr Litz, I guess you're
right.

You're an idiot. Bare wires would form a single conductor.
Isolated wires form litz configurations. No braiding or weaving is
required.

 

[DarkMatter]

On Tue, 23 Dec 2003 10:35:00 -0600, John Fields
<jfields@austininstruments.com> Gave us:

Which is what you thought you were dealing with. (A #16 equivalent, that
is...)

You are incorrect.

The coil was initially wound with 14 Ga solid wire.

The litz wound coils work better.

The reason is skin effect. Period.

 

[DarkMatter]

On Tue, 23 Dec 2003 11:09:33 -0600, John Fields
<jfields@austininstruments.com> Gave us:

On Tue, 23 Dec 2003 11:55:08 -0500, "Greg Neill"
gneillREM@OVE.netcom.ca> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message
news:tgmguv0c99nc5pr9r6iudjor9buf2k068h@4ax.com...

---
Well, let's see...

One strand of #22 has a cross sectional area of 0.0005046 square inches,
and one strand of #19 has a cross sectional area of 0.001012 square
inches, so 0.001012/0.0005046 = 2.005549 strands ~ 2 strands.

Hmmm. For DC or AC use? If AC, at what frequency? Like beauty,
electricity is sometimes only skin deep.


Read the fucking thread.

Plonk to the lame fuck!

I don't need to read your baby bullshit anymore.

 

[DarkMatter]

On Tue, 23 Dec 2003 12:55:33 -0600, John Fields
<jfields@austininstruments.com> Gave us:

Hey, asshole, if you'd taken a few minutes to check the thread you'd
have found out exactly what was going on and you would have gotten the
answers to one of your questions. But no, you'd rather be an
inconsiderate little prick and have everybody else do your legwork for
you.

Fuck you _and_ your sarcastic "have a nice day" shit.

This is the same retard that re-iterates what is written on a site
to someone to the tune of 40 or more lines, but doesn't have a single
line expressing so much as the time of day here.

What an ignorant, retarded troll fuck you are.

Fuck you, and your petty kaka ass, ya dumb fuck.