Check my capacitor calculation

[sinebar]

I need to make a plate capacitor of 7nF 50KV. I will use aluminum
foil and 1.5mm thick polycarbonite insulator.
The area I came up with is 3.5 sqaure meters. Is that right?

 

[Sjouke Burry]

sinebar wrote:

I need to make a plate capacitor of 7nF 50KV. I will use aluminum
foil and 1.5mm thick polycarbonite insulator.
The area I came up with is 3.5 sqaure meters. Is that right?

Check out the link below for the epsilon value

http://www.ami.ac.uk/courses/topics/0184_dp/index.html

Formula for capacitance:
> http://www.microwaves101.com/encyclopedia/capacitormath.cfm#parallel

 

[John Ferrell]

On Mon, 10 Jan 2011 11:47:13 -0800 (PST), sinebar
<sinebar3770@gmail.com> wrote:

I need to make a plate capacitor of 7nF 50KV. I will use aluminum
foil and 1.5mm thick polycarbonite insulator.
The area I came up with is 3.5 sqaure meters. Is that right?

I am certain it is not.

7nf is close to what you have with two pieces of wire twisted together
for about 5 inches.

John Ferrell W8CCW

 

[Sjouke Burry]

John Ferrell wrote:

On Mon, 10 Jan 2011 11:47:13 -0800 (PST), sinebar
sinebar3770@gmail.com> wrote:

I need to make a plate capacitor of 7nF 50KV. I will use aluminum
foil and 1.5mm thick polycarbonite insulator.
The area I came up with is 3.5 sqaure meters. Is that right?

I am certain it is not.

7nf is close to what you have with two pieces of wire twisted together
for about 5 inches.

John Ferrell W8CCW
I think you are talking about picofarads with the twisted wire

7 Nanofarad is 7000 picofarad.

 

[Baron]

sinebar Inscribed thus:

I need to make a plate capacitor of 7nF 50KV. I will use aluminum
foil and 1.5mm thick polycarbonite insulator.
The area I came up with is 3.5 sqaure meters. Is that right?

Do you mean 7 nanofarad or 7000 picofarad ?

--
Best Regards:
Baron.

 

[Michael A. Terrell]

Baron wrote:

sinebar Inscribed thus:

I need to make a plate capacitor of 7nF 50KV. I will use aluminum
foil and 1.5mm thick polycarbonite insulator.
The area I came up with is 3.5 sqaure meters. Is that right?

Do you mean 7 nanofarad or 7000 picofarad ?

That must be some mighty thin insulation on that wire.


--
You can't fix stupid. You can't even put a band-aid on it, because it's
Teflon coated.

 

[Spehro Pefhany]

On Mon, 10 Jan 2011 11:47:13 -0800 (PST), the renowned sinebar
<sinebar3770@gmail.com> wrote:

I need to make a plate capacitor of 7nF 50KV. I will use aluminum
foil and 1.5mm thick polycarbonite insulator.
The area I came up with is 3.5 sqaure meters. Is that right?

A = C * d / (k * e0)

= 7E-9 * 1.5E-3/(2.9 * 8.854E-12)

= ??

... maybe you put k in the numerator?


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[sinebar]

On Jan 11, 3:39 pm, Baron <baron.nos...@linuxmaniac.nospam.net> wrote:

sinebar Inscribed thus:

I need to make a plate capacitor of 7nF 50KV.  I will use aluminum
foil and 1.5mm thick polycarbonite insulator.
The area I came up with is 3.5 sqaure meters.  Is that right?

Do you mean 7 nanofarad or 7000 picofarad ?

--
Best Regards:
                     Baron.

Yes I mean 7 nanofarad.

 

[John Ferrell]

On Tue, 11 Jan 2011 17:37:41 +0100, Sjouke Burry
<burrynulnulfour@ppllaanneett.nnll> wrote:

John Ferrell wrote:
On Mon, 10 Jan 2011 11:47:13 -0800 (PST), sinebar
sinebar3770@gmail.com> wrote:

I need to make a plate capacitor of 7nF 50KV. I will use aluminum
foil and 1.5mm thick polycarbonite insulator.
The area I came up with is 3.5 sqaure meters. Is that right?

I am certain it is not.

7nf is close to what you have with two pieces of wire twisted together
for about 5 inches.

John Ferrell W8CCW
I think you are talking about picofarads with the twisted wire
7 Nanofarad is 7000 picofarad.
My error!

You are correct...
John Ferrell W8CCW