Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Simplistic Mosfet HV Shunt Regs
Simplistic Mosfet HV Shunt Regs
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 10th April 2012, 05:21 PM   #2891
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Great balls of fire

R2 disappeared & R5 burned, possibly D5 & D6 damaged
Attached Images
File Type: jpg DSC00052.jpg (424.4 KB, 308 views)

Last edited by merlin el mago; 10th April 2012 at 05:33 PM.
  Reply With Quote
Old 10th April 2012, 05:30 PM   #2892
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Have you worked out yet how the Salas Shunt Regulator low voltage versions work?

Prior to gaining that knowledge I consider it stupidity to gamble with 240Vdc in a circuit you don't understand.
__________________
regards Andrew T.
  Reply With Quote
Old 10th April 2012, 05:38 PM   #2893
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
Simplistic Mosfet HV Shunt Regs
Don't be so harsh Andrew; the moment you make PCBs available you will have to expect that people have some expectation of solder, plug, and play.

However, Andrew is right in that you need to be very careful with these high voltages. Someone should post a little guide of how to first test these regulators once soldering is finished. Dummy resistor, current calculations, etc. This may have very well been done, but I don't know it because I haven't been reading so carefully the thread lately.
  Reply With Quote
Old 10th April 2012, 05:40 PM   #2894
vgeorge is offline vgeorge  Greece
diyAudio Member
 
vgeorge's Avatar
 
Join Date: Mar 2004
Location: poros island
Simplistic Mosfet HV Shunt Regs
At least the board is black and doesn' t show bad!
If I was you now, I would take out ALL the semis and check them. For sure one of the dn2540 is off.
I think you have shorted something.
__________________
"Without deviations from the norm, progress is not possible" - Frank Zappa
  Reply With Quote
Old 10th April 2012, 05:41 PM   #2895
vgeorge is offline vgeorge  Greece
diyAudio Member
 
vgeorge's Avatar
 
Join Date: Mar 2004
Location: poros island
Simplistic Mosfet HV Shunt Regs
Iko,
Salas have already made a PDF for that.
__________________
"Without deviations from the norm, progress is not possible" - Frank Zappa
  Reply With Quote
Old 10th April 2012, 06:01 PM   #2896
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
@ Iko as you said I expected plug & play but possible is my fault: irf840 not isolated well from heatsink, I do the SSHV p2p and going OK 240V 60mA. Salas posted a PDF for this new version SSHV2, I followed his instructions to make it.

@George, OK I will change all semis for a new set to go fast.
  Reply With Quote
Old 10th April 2012, 06:20 PM   #2897
vgeorge is offline vgeorge  Greece
diyAudio Member
 
vgeorge's Avatar
 
Join Date: Mar 2004
Location: poros island
Simplistic Mosfet HV Shunt Regs
If you use the same pcb, check and clean it.
Don' t go fast, take your time.
When I first did it p2p it worked fine, because I took my time. I burned one or two semis when I was trying different ones and I thought that I gained confidence.
__________________
"Without deviations from the norm, progress is not possible" - Frank Zappa
  Reply With Quote
Old 11th April 2012, 09:44 AM   #2898
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Changed all semis, diodes & burned resistors.

Max. current reached 319mA I read 0,319V across TP, Vout with this current 281V but can low the voltage to 240V the voltage is fixed 281V

If I reduce the Vout with R4 trimmer (used for adjust current) I can reach 240V but the current must reduced to 275mA I read 0,275V across TP
  Reply With Quote
Old 11th April 2012, 09:45 AM   #2899
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
The regulator half is not regulating.
__________________
regards Andrew T.
  Reply With Quote
Old 11th April 2012, 11:33 AM   #2900
vgeorge is offline vgeorge  Greece
diyAudio Member
 
vgeorge's Avatar
 
Join Date: Mar 2004
Location: poros island
Simplistic Mosfet HV Shunt Regs
Did you measure the parts that you replaced?
What was burned?
Also, what Andrew said, current regulator seems to be working, voltage regulator not.
__________________
"Without deviations from the norm, progress is not possible" - Frank Zappa
  Reply With Quote

Reply


Simplistic Mosfet HV Shunt RegsHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Regs - Shunt vs Series richie00boy Solid State 59 17th June 2017 03:59 PM


New To Site? Need Help?

All times are GMT. The time now is 04:33 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki