Capacitors with more than two plates?

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Discussion Overview

The discussion revolves around the concept of capacitors with more than two plates, exploring the implications of such designs, their efficiency, and how they might behave differently compared to traditional dual-plate capacitors. It touches on theoretical aspects and practical examples from various types of capacitors.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions whether capacitors can have more than two plates and what the implications of such designs would be, including efficiency concerns.
  • Another participant suggests that having multiple plates would behave similarly to capacitors arranged in series or parallel, depending on the configuration of the plates.
  • A participant raises a question about the existence of capacitors without plates, specifically mentioning Multi-Layered Ceramic Capacitors (MLCCs) and their construction involving multiple plates.
  • Reference is made to variable plate capacitors, which were historically used in tube radios for tuning, indicating a practical application of capacitors with more than two plates.
  • One participant expresses appreciation for the discussion, highlighting the challenges mechanical engineers face when dealing with abstract concepts like electrons.
  • There is a reiteration of the question about capacitors without plates, with a clarification that simple flat single-plate capacitors are rare, and a mention of electrolytic capacitors where plates are rolled up.

Areas of Agreement / Disagreement

The discussion contains multiple viewpoints regarding the nature and behavior of capacitors with more than two plates, with no consensus reached on the efficiency or practical implications of such designs.

Contextual Notes

Participants reference various types of capacitors and their configurations, but there is a lack of detailed mathematical or technical analysis regarding the efficiency and behavior of multi-plate capacitors.

jerich1000
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I am a mechanical engineer and not an electrical engineer, so feel free to snicker at my question. Can a capacitor have more than two plates?

If so, what happens? Is it less efficient? How would a tripple- or quaduple-plate capacitor behave differently than a dual-plate capacitor, assuming one was even made?

Thanks
 
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Neglecting the fact that there are very few actual plate capacitors, having multiple plates would be similar to putting capacitors in series (or parallel, depending on how the plates were arranged).
 
MATLABdude said:
Neglecting the fact that there are very few actual plate capacitors, having multiple plates would be similar to putting capacitors in series (or parallel, depending on how the plates were arranged).
What kind of capacitors don't have "plates"?

Aren't Multi-Layered Ceramic Capacitors (MLCCs) made by having a big stack of several plates and alternating whether they are hooked up to one side or the other?
 
Variable plate capacitors were very common back in the tube radio days for tuning in stations.

Variable_Capacitor.jpg


http://en.wikipedia.org/wiki/Variable_capacitor"
 
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Thanks. You people are awesome. Mechanical engineers get queasy when they're dealing with things they can't see with their eyes (such as electrons).
 
Jiggy-Ninja said:
What kind of capacitors don't have "plates"?

Aren't Multi-Layered Ceramic Capacitors (MLCCs) made by having a big stack of several plates and alternating whether they are hooked up to one side or the other?

Who said anything about not using plates? You just seldom see simple flat single-plate capacitors (disc capacitors being the exception). This made more sense before the morning coffee and with electrolytics on the mind (where the plates are all rolled up).
 
MATLABdude said:
This made more sense before the morning coffee and with electrolytics on the mind (where the plates are all rolled up).

:approve:
 

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