Big challenge for best engeneer

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Discussion Overview

The discussion revolves around a challenge posed by a participant regarding the derivation of the corona voltage formula, specifically seeking a detailed explanation from beginning to end. The context includes elements of engineering and electrical theory, with a focus on the complexities of deriving a specific formula related to corona discharge phenomena.

Discussion Character

  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant presents a simplified formula for corona voltage, expressing it as t=(Vrms/17236)^1.5, where Vrms is the RMS corona start voltage in air at sea level and t is the thickness in inches.
  • Another participant challenges the appropriateness of the original poster's request, suggesting that it may not align with the forum's purpose of helping those in need of assistance.
  • The original poster defends their challenge as a way to engage the community and promote learning, indicating that a surprise awaits those who successfully derive the formula.
  • A later reply reiterates the concern that such challenges could lead to misuse of the forum for homework assistance, which could undermine the learning process.

Areas of Agreement / Disagreement

Participants express disagreement regarding the nature of the challenge, with some viewing it as a fun engagement and others seeing it as inappropriate for the forum's educational intent. The discussion remains unresolved regarding the suitability of the challenge.

Contextual Notes

There are limitations in the clarity of the original formula requested and the assumptions underlying the challenge, as well as the potential implications for forum dynamics and educational integrity.

alonline
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hi :]

i have a surprise for anyone who can solve my challenge:


we have the korona voltage formula...
http://img130.imageshack.us/img130/4859/aaae.jpg"

let's see who can give me the long way to it (from beginning to end and can explain it).. since it's the final formula..

only 3 people succeed so far

i promise you won't be dissapointed :]

good luck!
 
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Assuming you are talking about Corona (Partial Discharge)

Can't give you the derived formula, but can give you a simplified formula.

t=(Vrms/17236)^1.5

Vrms=60 hertz RMS corona start voltage in air at sea level

t=thickness in inches

Formula is a simplified equation from equation in the Book "Reference Data For Radio Engineers", "Fifth Edition".

Formula is reasonably accurate for transformer using kraft paper or Nomex insulation.
 
--------------------------------------------------------------------------------
Assuming you are talking about Corona (Partial Discharge)

Can't give you the derived formula, but can give you a simplified formula.

t=(Vrms/17236)^1.5

Vrms=60 hertz RMS corona start voltage in air at sea level

t=thickness in inches

Formula is a simplified equation from equation in the Book "Reference Data For Radio Engineers", "Fifth Edition".

Formula is reasonably accurate for transformer using kraft paper or Nomex insulation.

i had this answer a few times.. you are correct but the formula i asked is harder work it wouldn't be fair for other so I'm sry no hard feelings?:wink:

but! if you will find the formula i askes it's 150% surprise for you and not 100% like for the others
 
No.

You might have the wrong idea about why this Forum exists.

It is a group of volunteers who try to help people who need help.

It seems you already have your answer and want to see if anybody will jump through hoops for your amusement. I hope nobody does.
 
no, i got it- i just wanted to give a challenge to everyone here.. makes things more fun and from the suprize i give you can trust me that a lot of ppl can learn a lot from.

:]
 
alonline said:
no, i got it- i just wanted to give a challenge to everyone here.. makes things more fun and from the suprize i give you can trust me that a lot of ppl can learn a lot from.

:]

As was said, that is not how the PF works. It would be too easy for students to post their homework problems as "challenges", and therby cheat on their homework.

Thread locked.
 

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