1000V power supply with low amp rating... - Electronic Circuits Projects Diagrams Free

9th April 2007, 04:14 AM

I require a 1000V power supply with a very low amp rating for my... needs.

It must put out over 1000V and must be built using a wall adapter.

Can you help me out?

[yes i know, high voltage, dangerous, etc etc straight answer plz!!!!]

9th April 2007, 04:25 AM

I also need some very high voltage rated capacitors with small values, like 1nF or 1000pF

voltage rating must be over 10k volts

Oznog · 9th April 2007, 04:46 AM

First you MUST say what you need this for. We have no idea what sort of regulation and ripple are needed. Is this even AC or DC? You must also state a specific current. "low amps" means nothing. 300mA is small beans for a 6V wall wart. 300mA @ 1000V is a huge power supply, well compared to a consumer wall wart. Large and small don't mean anything by themselves, it's all relative.

9th April 2007, 05:04 AM

ok, i need this for a experiment for a marx generator. needs to be DC. Have around 2-10mA, and i can build any conponent. must be somewhat smoothed, yet not perfect. MUST have at least over 1000v output with 2-10 mA amp rating.

**Nigel Goodwin** · 9th April 2007, 09:20 AM

Either a specific HV transformer, or a walton cockcroft multiplier to increase the voltage from the transformer.

HiTech · 9th April 2007, 01:38 PM

Well I was about to suggest a microwave oven Xformer, but that would require a steel strap and anchor screws or lots of duct tape to adhere it to a wall outlet!

Hero999 · 11th April 2007, 09:11 PM

A CCT inverter with a bridge rectifier or multiplier on the output.

Overclocked · 11th April 2007, 09:49 PM

Quote:

Originally Posted by HiTech

Well I was about to suggest a microwave oven Xformer, but that would require a steel strap and anchor screws or lots of duct tape to adhere it to a wall outlet!

Those put out 2kv RMS, and the signal is AC. The current is around 900ma, and will kill you if you made some sort of mistake. There is a way to limit the current, I know if you short circuit the primary it can trip a 15Amp Breaker.

stevez · 12th April 2007, 11:17 AM

Your spec of 1000 v @ 10 ma just might be at or over the limits of wall warts that I've seen. You indicate an output of 10 W implying an input of something greater than that to account for inefficiency. The ones I have around that are nearly too large to be wall warts are 12 vdc @ 700 ma. If the plan was to start at 12 vdc you'd need at least 1 amp - that's a lot for a wall wart though they may make them.

Amateur radio home brewers build supplies (but not from wall warts) that are 500 vdc to 4000 vdc at current ratings like 100 ma and up. You might take a look at what they do. I know that commercial supplies (usually for vacuum tube linear amplifiers) are more switched mode now. A friend of mine is designing a SMPS with 110 vac input, 480 vdc output for a tube amplifier. If he's got a concept complete and is willing to share it I'll pass it along.

Hero999 · 12th April 2007, 08:38 PM

1kV@10mA, that's 10W, more than I first thought.

This sounds like it's going to be a custom built power supply to me.

You could use a TV flyback driver but you'll probably need to wind a custom transformer.
http://www.powerlabs.org/flybackdriver.htm

13th April 2007, 02:07 AM

well, ive never done this before, so I will take all suggestions hapily

(dunno if i spelled that right rofl)

I know this is dangerous, but I think with enough suggestions, I shall get a wider view of how and what to do.

13th April 2007, 02:10 AM

this looks complicated, seeing ive never used transformers, and this flyback will be difficult to find i believe. Can you help me?

Sceadwian · 13th April 2007, 05:07 AM

Why not just use a CCFL transformer? They're meant to be used like a flyback.

Hero999 · 13th April 2007, 09:04 PM

Good idea.

You might need to rewind it and use a different driver; also just make sure it's rated for more than 10W.

Analog · 14th April 2007, 10:59 AM

Neon transformer FTW.

9th April 2007, 04:14 AM	(permalink)
Souper man	1000V power supply with low amp rating... I require a 1000V power supply with a very low amp rating for my... needs. It must put out over 1000V and must be built using a wall adapter. Can you help me out? [yes i know, high voltage, dangerous, etc etc straight answer plz!!!!]

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9th April 2007, 04:25 AM	(permalink)
Souper man	I also need some very high voltage rated capacitors with small values, like 1nF or 1000pF voltage rating must be over 10k volts

9th April 2007, 04:46 AM	(permalink)
Oznog	First you MUST say what you need this for. We have no idea what sort of regulation and ripple are needed. Is this even AC or DC? You must also state a specific current. "low amps" means nothing. 300mA is small beans for a 6V wall wart. 300mA @ 1000V is a huge power supply, well compared to a consumer wall wart. Large and small don't mean anything by themselves, it's all relative. __________________ I thought what I'd do was I'd pretend I was one of those deaf-mutes.

9th April 2007, 05:04 AM	(permalink)
Souper man	ok, i need this for a experiment for a marx generator. needs to be DC. Have around 2-10mA, and i can build any conponent. must be somewhat smoothed, yet not perfect. MUST have at least over 1000v output with 2-10 mA amp rating.

9th April 2007, 09:20 AM	(permalink)
Nigel Goodwin	Either a specific HV transformer, or a walton cockcroft multiplier to increase the voltage from the transformer. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

9th April 2007, 01:38 PM	(permalink)
HiTech	Well I was about to suggest a microwave oven Xformer, but that would require a steel strap and anchor screws or lots of duct tape to adhere it to a wall outlet! __________________ Don't make me reach through this monitor to slap you a good one!

11th April 2007, 09:11 PM	(permalink)
Hero999	A CCT inverter with a bridge rectifier or multiplier on the output. __________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez

12th April 2007, 11:17 AM	(permalink)
stevez	Your spec of 1000 v @ 10 ma just might be at or over the limits of wall warts that I've seen. You indicate an output of 10 W implying an input of something greater than that to account for inefficiency. The ones I have around that are nearly too large to be wall warts are 12 vdc @ 700 ma. If the plan was to start at 12 vdc you'd need at least 1 amp - that's a lot for a wall wart though they may make them. Amateur radio home brewers build supplies (but not from wall warts) that are 500 vdc to 4000 vdc at current ratings like 100 ma and up. You might take a look at what they do. I know that commercial supplies (usually for vacuum tube linear amplifiers) are more switched mode now. A friend of mine is designing a SMPS with 110 vac input, 480 vdc output for a tube amplifier. If he's got a concept complete and is willing to share it I'll pass it along. __________________ stevez

12th April 2007, 08:38 PM	(permalink)
Hero999	1kV@10mA, that's 10W, more than I first thought. This sounds like it's going to be a custom built power supply to me. You could use a TV flyback driver but you'll probably need to wind a custom transformer. http://www.powerlabs.org/flybackdriver.htm __________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez

13th April 2007, 02:07 AM	(permalink)
Souper man	well, ive never done this before, so I will take all suggestions hapily (dunno if i spelled that right rofl) I know this is dangerous, but I think with enough suggestions, I shall get a wider view of how and what to do.

13th April 2007, 02:10 AM	(permalink)
Souper man	this looks complicated, seeing ive never used transformers, and this flyback will be difficult to find i believe. Can you help me?

14th April 2007, 10:59 AM	(permalink)
Analog	Neon transformer FTW. __________________ "Everything that is done in the world is done by hope." -Martin Luther "There are two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle."-Albert Einstein

13th April 2007, 05:07 AM	(permalink)
Sceadwian	Why not just use a CCFL transformer? They're meant to be used like a flyback. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

13th April 2007, 09:04 PM	(permalink)
Hero999	Good idea. You might need to rewind it and use a different driver; also just make sure it's rated for more than 10W. __________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez