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Re: rolled capacitor plate tabs
Doug and other cappers,
Your idea is good. In fact, making the tabs wider accomplishes a similar
improvement. Carried to the extreme, the "tab" can be the entire edge of
the plate. In a stacked plate cap, alternate plates extend beyond the
dielectric sheets at opposite ends of the stack. Then all the pertruding
ends can be clamped together at each end of the stack. Makes for a very
good pulse cap, i.e. low resistance and inductance. In fantastic ASCII
illustration, we have:
aaaaaaaaaaaaaaaaaaaa
| dddddddddddddddd
---| bbbbbbbbbbbbbbbbbbbb
| dddddddddddddddd |
aaaaaaaaaaaaaaaaaaaa |---
dddddddddddddddd |
bbbbbbbbbbbbbbbbbbbb
etc.
d is the dielectric, and a and b are the plates. Clamp all the a plates
together, and clamp all the b plates together.
This same idea works well for rolled caps. Instead of making the
connections at the narrow ends of the plates, you clamp together the entire
rolled rolled up foil plates which extend out both sides of the rolled cap.
--Steve
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> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: rolled capacitor plate tabs
> Date: Tuesday, January 19, 1999 12:07 PM
>
> Original Poster: dferguso-at-ebmail.gdeb-dot-com
>
> all the rolled capacitor plates i have seen have only one tab or
connection
> point on one end of each plate.
> it would seem that having both ends of each plate connected to the
> capacitor terminal would reduce the inductance
> of the capacitor ( i.e. the charge could enter and exit from both ends of
> the plate) , and the resistance of the capacitor
> would be lower since there would be twice the amount of tabs or
connection
> leads to each plate. is this idea not used because the flux in the plates
> would be travelling in opposite directions or something? thanks for
> your opinions- doug
>
>
>