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Author Topic: Bifilar capacitor  (Read 7625 times)

Offline MasterPlaster

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Bifilar capacitor
« on: February 18, 2014, 07:32:52 PM »
Hello All,

An idea has been floating in my head and I thought I share it with all of you.

I look forward to your comments:

 -------------------------------
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Offline MarkE

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Re: Bifilar capacitor
« Reply #1 on: February 18, 2014, 07:48:07 PM »
How is this any different than a multilayer ceramic capacitor, a rolled polyester capacitor, or a rolled electrolytic capacitor?
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Offline markok

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Re: Bifilar capacitor
« Reply #2 on: February 18, 2014, 10:08:23 PM »
A good way of thinking. I taught also in that way but I think that the point is in dielectric. Definition of dielectric is high resistant material that we can also say is staticaly charged.
My idea was to find a dielectric that is quick high staticaly charged.
Then the discharging through a spark gap would happen regulary and create a voltage with a frequency that could possibly be usefull.   
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Offline MasterPlaster

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Re: Bifilar capacitor
« Reply #3 on: February 18, 2014, 11:34:45 PM »
Quote from: MarkE on February 18, 2014, 07:48:07 PM
How is this any different than a multilayer ceramic capacitor, a rolled polyester capacitor, or a rolled electrolytic capacitor?

Hi Mark,

I am actually no expert in capacitors but as I understand it, what does the work in the capacitor is the dielectric.

The capacitor on the left side of your image is more like what I am talking about. It reminds me of the variable capacitors
used in radios also, all the multi layer capacitor I know of are low value ceramic ones.

In the picture you attached, the rolled capacitor on the right hand side is different although same amount of material will
be required.

I have not been able to make a test device to observe the performance  yet but, I am planning to use 4 thirty meter
 roles of aluminum cooking foils with layers of cling film as dielectric. This is easier said than done for me as I have
no where to do the work.

You may appreciate that just using words one can not describe how a bifilar coil works and this is the same for the capacitor.

Thank you for your question.



 
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Offline Vladokv

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Re: Bifilar capacitor
« Reply #4 on: February 18, 2014, 11:56:43 PM »
Here is very interesting and mind blowing page about parallel plate condesator
http://www.feynmanlectures.caltech.edu/II_23.html#Ch23-F15


People have done interesting researches on condesators, and I have few totally
new ideas. More new ideas should come. People done nearly everything with coils.
Do you like new page I found?
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Offline MasterPlaster

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Re: Bifilar capacitor
« Reply #5 on: February 19, 2014, 12:14:08 AM »
Vlad, thank you for the link. Very interesting.

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Offline MarkE

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Re: Bifilar capacitor
« Reply #6 on: February 19, 2014, 12:57:00 AM »
Quote from: MasterPlaster on February 18, 2014, 11:34:45 PM
Hi Mark,

I am actually no expert in capacitors but as I understand it, what does the work in the capacitor is the dielectric.

The capacitor on the left side of your image is more like what I am talking about. It reminds me of the variable capacitors
used in radios also, all the multi layer capacitor I know of are low value ceramic ones.

In the picture you attached, the rolled capacitor on the right hand side is different although same amount of material will
be required.

I have not been able to make a test device to observe the performance  yet but, I am planning to use 4 thirty meter
 roles of aluminum cooking foils with layers of cling film as dielectric. This is easier said than done for me as I have
no where to do the work.

You may appreciate that just using words one can not describe how a bifilar coil works and this is the same for the capacitor.

Thank you for your question.
Well capacitors are pretty well understood quantities.  Yes the field, the energy is almost exclusively in the dielectric.  As long as you are not either building physically giant capacitors or applying them at high frequencies you can treat a capacitor as a combination of lumped resistance, inductance, and capacitance.  When the frequencies get high enough then the structure exhibits resonant modes and we can't accurately treat it as a combination or R-L-C-G.
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Offline MarkE

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Re: Bifilar capacitor
« Reply #7 on: February 19, 2014, 12:58:33 AM »
Quote from: Vladokv on February 18, 2014, 11:56:43 PM
Here is very interesting and mind blowing page about parallel plate condesator
http://www.feynmanlectures.caltech.edu/II_23.html#Ch23-F15


People have done interesting researches on condesators, and I have few totally
new ideas. More new ideas should come. People done nearly everything with coils.
Do you like new page I found?
This is the world of high frequency.  Go fast enough and even small things are transmission structures that have resonant modes.
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