Plasma cutter power supply - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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 20th October 2006, 11:16 AM   #1
Nixie is offline Nixie  Canada
Banned
 
Join Date: Jan 2006
Location: Vancouver, BC
Default Plasma cutter power supply

I'm looking for schematics for a suitable switching power supply, 115 VAC mains in, 90 VDC 15 A out. Didn't want to do linear due to the need for huge transformer and filter caps.
  Reply With Quote
Old 20th October 2006, 12:40 PM   #2
diyAudio Member
 
Join Date: Oct 2002
Location: Royal Oak, MI.
Hey Nixie,
Are you replacing a damaged Plasma supply, or are you DIY'ing a Plasma cutter from scratch?

Tall Shadow
  Reply With Quote
Old 20th October 2006, 12:46 PM   #3
Nixie is offline Nixie  Canada
Banned
 
Join Date: Jan 2006
Location: Vancouver, BC
DIYing from scratch. I already built the torch head.
  Reply With Quote
Old 20th October 2006, 03:24 PM   #4
diyAudio Member
 
Join Date: Oct 2002
Location: Royal Oak, MI.
I'd love to get any info you could provide!
I've been searching for information about doing the same thing for some time now, and what little I did have was just lost on an un-backed up hard drive.(dumb!, dumb!, Dumb! Me!!)

Any plans, Sites, or other information would be helpful!
I've had so little luck in finding any information on the requirements needed by a Plasma cutter supply.

It might be that, the power supply could be made form a modified existing supply.....I don't know..

Thanks!, I'm really looking forward to seeing where this goes.

Tall Shadow
  Reply With Quote
Old 20th October 2006, 09:55 PM   #5
Nixie is offline Nixie  Canada
Banned
 
Join Date: Jan 2006
Location: Vancouver, BC
Well I only have plans for the torch head. I bought them on eBay, and I don't think it would be fair to the seller if I gave them to others. At $7, it's not much to buy them.

A directly mains-rectified and filtered supply using a multi-gallon salt water resistor can be found at http://tech.groups.yahoo.com/group/p...omeBrewPlasma/
However, I'd prefer a more efficient switching supply.
  Reply With Quote
Old 23rd October 2006, 04:55 AM   #6
Nixie is offline Nixie  Canada
Banned
 
Join Date: Jan 2006
Location: Vancouver, BC
Oh come on, surely someone here knows about switching power supplies. Where do I find a 15 kVA high frequency transformer?

What about multiples of smaller transformers, like say several of this one in series: http://www.surplussales.com/Transfor...hingXmers.html (TP) 20T0175-A01
  Reply With Quote
Old 23rd October 2006, 05:30 AM   #7
diyAudio Member
 
Join Date: Dec 2004
Location: Berlin
Nice link!
Why not buy there 2 for 69$ each?

• Input: 115 / 230v - 15 amps max. 50 / 60 / 400 Hz
• Output: 48.0v @ 15.6 amps, 5.1v @ 50 amps, 24.0v @ 10 amps / 2000 watts total
• Voltage adjustment: ± 10% minimum
• Line & load regulation: 0.2% + 5mV max
• Ripple: RMS 0.1% or 10mV
• Ripple: Pk-Pk 1% or 50mV
• Dynamic response: 25% load step, 2% or 100 mV (any output)
• Recovery time: To within 1% in 300΅ sec
• Overvoltage protection: 2 to 5 V 122% to 134% of output voltage; 12 to 48 V 110% to 120%; recycle AC.
• Overload protection: 105% to 120% of rated current. Auxiliaries 105% - 140%
• Short circuit protection: Protected for continuous short circuit, recovery automatic
• Reverse voltage protection: 100% or rated output current
• Thermal protection: Each module thermally protected. Input module: Auto recovery. Output modules: Recycle AC
• Dimensions: 5" x 11-3/4" x 5"H
  Reply With Quote
Old 23rd October 2006, 06:55 AM   #8
Nixie is offline Nixie  Canada
Banned
 
Join Date: Jan 2006
Location: Vancouver, BC
Can I put them in series to get the voltage I need? Plus, $138 for under 1.5 kW is steep, and where's the DIY in buying a complete unit.
  Reply With Quote
Old 23rd October 2006, 02:33 PM   #9
diyAudio Member
 
Join Date: Dec 2004
Location: Berlin
Nixie:
"Can I put them in series to get the voltage I need? "

Don΄t know but normally the secondary is left floating.

"$138 for under 1.5 kW is steep"

That depends...I suppose to buy only the parts (plus the broken parts )will cost about the same!

"and where's the DIY in buying a complete unit."

And why You look to surplus parts?
You don΄t consider to mix and press ferrites and so on....
Ok that can be a point, but in my view that is not a challenge in contrast eg to create a useful plasma speaker!

Heinz!
  Reply With Quote
Old 23rd October 2006, 05:45 PM   #10
diyAudio Member
 
Ultima Thule's Avatar
 
Join Date: Jan 2004
Location: Koskenkorva Land
http://www.paytongroup.com/
__________________
"If transistors are blueberries and FETs are strawberries, then tubes must be.. pears"
Michael 29th January 2010
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vibrating cutter...any available gmphadte Parts 10 7th December 2007 08:10 AM
DIY Vinyl Cutter, guidance needed :+) loonatron Analogue Source 89 23rd November 2007 03:30 PM
Router cutter dropping! dnsey Multi-Way 16 11th July 2006 01:40 PM
Power voltage on plasma jaxjason Digital Source 0 5th May 2006 07:20 AM


New To Site? Need Help?

All times are GMT. The time now is 07:43 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2