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Analog Angle

Litz Wire & Other Component Cleverness

Bill Schweber
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amrutah
amrutah
5/22/2013 11:43:41 PM
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Master
Re: modelling the transmission line
Brad, Exactly, that's what I meant.

  A single line Tx is itself very difficult to model (whether to use a distributed or lumped model) and then we have the Z0 (characteristic impedance) and the delay of the Line.  If its multi-stranded line how do we model it?

  

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Brad Albing
Brad Albing
5/21/2013 12:29:52 PM
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Re: modelling the transmission line
Amrutah - do you mean, how difficult is it to model multi-strand litz wire when used at high-frequencies as part of a transmission line? Hmm... not sure how well various simulators do in this regard. Or more generally, how well do most simulation sofwares do with skin-effect? Maybe someone else can speak to that.

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amrutah
amrutah
5/20/2013 10:28:21 PM
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modelling the transmission line
compared to using a co-axial cable having a CAT5 cable for connecting the 100BT line is much better due to the efficiency.  But how difficult is it to model the transmission involving multi strands?

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DEREK.KOONCE
DEREK.KOONCE
5/16/2013 5:15:38 PM
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Master
Re: Speaking of skin effect
I was thinking the same thought. Skin effect can affect copper usage - although based on current and frequency of power operation.

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Brad Albing
Brad Albing
5/16/2013 4:03:27 PM
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Re: Speaking of skin effect
Drat - and I was just planning on writing a blog about the skin effect. Hmm - need to think of another topic.

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TheMeasurementBlues
TheMeasurementBlues
5/16/2013 8:06:47 AM
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Teacher
Speaking of skin effect
We have a blog about why skin effect occurs at The Connecting Edge.

See The Skin Gets Ever Thinner.

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Brad Albing
Brad Albing
5/13/2013 11:14:09 PM
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Re: litz wire insulation
I also recall doing that with the [waxed] paper + al-foil devices. These were not especially high quality capacitors, but were plentiful in the old radios and TVs of my youth.

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Brad Albing
Brad Albing
5/9/2013 1:39:46 PM
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Re: Litz Wire now used in Cellphone Chargers
Eafpres - while Tesla didn't invent the transformer, I recall he did some demos that he set up more as parlor tricks - light a light bulb with no apparent connection made to it (except for a transformer secondary winding). Very impressive to the Luddites of his day.

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Netcrawl
Netcrawl
5/9/2013 8:40:12 AM
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Master
Re: Litz Wire now used in Cellphone Chargers
@steve thanks for the links, I think Litz wire is perfectly fit for high frequency applications where the skin effect is more pronounced and proximity effect can be an even more severe problem, I'm not familiar with Qi standard, your links would probably rpovide some great help.

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Netcrawl
Netcrawl
5/9/2013 7:47:29 AM
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Master
Re: Litz Wire now used in Cellphone Chargers
Yes ,you're right Tesla didn't invent transformer but they're pretty good in solar battery chargers, the on ewe use in our hybrid cars. 

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