15 Kv linear power supply Help?

AI Thread Summary
The discussion centers on developing a high voltage power supply for a CO2 laser, specifically aiming for 15 kV output. The current setup uses 80 series-connected 1N4007 diodes, but the user seeks to replace them with five HV05-15 diodes rated for 15 kV. Questions arise regarding the necessary values for ceramic capacitors and resistances, as well as the formulas for these calculations. A suggestion is made to consider a 15 kV television flyback converter as a more efficient alternative. Safety concerns are emphasized due to the lethal nature of high voltages involved.
!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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