15 Kv linear power supply Help?

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Discussion Overview

The discussion revolves around the design and modification of a high voltage power supply, specifically targeting a 15 kV output for a CO2 laser application. Participants explore various circuit designs, components, and safety considerations related to high voltage systems.

Discussion Character

  • Homework-related
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant describes their current setup using 80 1N4007 diodes in series to achieve 15 kV and seeks advice on using a single diode rated for 15 kV (HV05-15) instead.
  • Another participant suggests considering a 15 kV television flyback converter circuit as a more efficient alternative to the current linear power supply design.
  • Concerns are raised about the safety of working with high voltages, emphasizing the need for proper guidance and caution.
  • A later reply expresses reluctance to assist due to concerns about the original poster's understanding of basic electronics and the risks involved in handling high voltage capacitor banks.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best approach to modify the power supply. There are competing views on whether to continue with the existing design or switch to a flyback converter, and safety concerns are highlighted without resolution.

Contextual Notes

Participants express varying levels of understanding of electronics, which may affect the quality of advice given. The discussion includes unresolved questions about the specific values of capacitors and resistors needed for the proposed modifications.

!DSeva
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Homework Statement




Hi friends,

We are working on a project for devloping a HIGH VOLTAGE POWER SUPPLY
Around 15 Kv for CO2 Laser.

Atpresent we have the power supply using 1N4007 that have a Vrrm (Peak
inverse voltage of 1000 V).We have uses 80 Diode in series as a diode bank.
To get an output of 15Kv.


http://img462.imageshack.us/img462/9214/untitledca4.png



Now wants to use diode of Piv or Vrrm= 15Kv (Diode no. HV05-15).

So please tell me what are the values of Ceramic capacitors and Resistances.

Also tell us the formulas for these calculations.

DATASHEET OF DIODE:

Part name= HV05-15

Vrrm or PIV 15 kv

Vrms 10.5 Kv

Vdc 15 Kv

If(av) 550 mA

Repetitive Peak Reverse Surge Current...IRSM 100 mA

Non-Repetitive Peak Forward Surge Current...IFSM 200 A


Homework Equations





The Attempt at a Solution



<< Note: character formatting removed by berkeman for readability >>
 
Last edited by a moderator:
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Welcome to the PF, !DSeva. I edited your post above to remove the large fonts and red characters. We strive to keep posts as readable as possible here, so please do not add wild formatting to your posts.

Now, on your question, have you considered just using a 15kV television flyback converter circuit instead? You could use one out of a small black & white TV set, or look up the parts list and build one from scratch. That would seem to be a more efficient way to make your 15kV laser power supply.

Oh, and you have an advisor helping you on this, right? Especially concerning the safety aspects of working with high voltages? These voltages are definitely lethal, if you don't know what you're doing. Please be careful.
 
Last edited:
berkeman said:
Welcome to the PF, !DSeva. I edited your post above to remove the large fonts and red characters. We strive to keep posts as readable as possible here, so please do not add wild formatting to your posts.

Now, on your question, have you considered just using a 15kV television flyback converter circuit instead? You could use one out of a small black & white TV set, or look up the parts list and build one from scratch. That would seem to be a more efficient way to make your 15kV laser power supply.

Oh, and you have an advisor helping you on this, right? Especially concerning the safety aspects of working with high voltages? These voltages are definitely lethal, if you don't know what you're doing. Please be careful.




But Sir i have to modify the existing linear power supply

By using 5 Nos 15 Kv Vrrm Diodes instead of using existing 80 nos 1Kv diodes

So please give the relevant reply very soon.

Thanks in advance.
 
Frankly if you don't understand enough basic electronics to know that I personally don't want to help you play with 15Kv capacitor banks!
 

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