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Author Topic: High current power supplies  (Read 36000 times)

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Offline rcfanuk

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Re: High current power supplies
« Reply #40 on: April 10, 2012, 11:43:36 AM »
Mine also arrived, thanks guys, my little 12v supply was struggling  :af

I also thought it was worth making this topic sticky as it's so useful to electrickery chaps

Steve
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Offline pheasant_plucker

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Re: High current power supplies
« Reply #41 on: April 10, 2012, 12:30:03 PM »
With petes permission ill make this in to an article.

Gerry
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Offline rcfanuk

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Re: High current power supplies
« Reply #42 on: April 10, 2012, 13:11:32 PM »
Good idea
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Offline PDR

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Re: High current power supplies
« Reply #43 on: April 10, 2012, 13:30:23 PM »
Permission granted subject to a satisfactory commercial negotiation...

:)

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Offline half throttle

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Re: High current power supplies
« Reply #44 on: April 10, 2012, 14:10:27 PM »
Well, I've ordered one and, if there are any problems, my man will challenge your man to pistols at dawn.
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Offline gavin mack

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Re: High current power supplies
« Reply #45 on: April 10, 2012, 15:00:14 PM »
Does anyone know if the corresponding rack, (fixed), power connector is available??
Mark.
nearest available is HP 321633-001 ProLiant DL380 G4 Power Backplane which will take 2 power supplies presumably as failsafe in case one fails
search ebay for 321633-001
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Offline flytilbroke

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Re: High current power supplies
« Reply #46 on: April 10, 2012, 21:53:19 PM »
I decided to connect the three pins directly rather than use a "plug". I used a bit wire off an old Futaba lead, fiddly task getting the wire neatly round the three pins, easy to solder when the joints are fluxed. I then managed to get two red and two black, heavy, multistrand wires soldered into the 12v and 0v terminals without cutting the socket side panels. For safety I then used hot glue to encapsulate the finished work area. I will use Peters idea for mounting the output terminals, although I think I shall use three sets.
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Offline gavin mack

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Re: High current power supplies
« Reply #47 on: April 11, 2012, 13:32:37 PM »
FYI
Image of backplane PSU
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Offline half throttle

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Re: High current power supplies
« Reply #48 on: April 23, 2012, 14:08:56 PM »
It arrived and is working perfectly.

Thanks Pete  :-*

Paul
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Offline rob-sten

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Re: High current power supplies
« Reply #49 on: July 04, 2012, 21:10:11 PM »
Hi all,

Missed this thread a couple of months ago but bagged a couple of these units on ebay for about £20 delivered!
Less than an hour with the solder iron and both are done and working fine.

Thought I'd post my simple way of doing the main 4mm connectors.... also with a pre-tinned bit of servo wire soldered in to bridge the pins.

KISS method.   :)

Rob

Offline clive_f

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Re: High current power supplies
« Reply #50 on: July 14, 2012, 22:47:42 PM »
Well as I am putting together a small electric and my old CB transformer struggles to give 1.4 amps i have taken the plunge as well.

No spare kettle leads at home so i will have to raid the spares box at work.

I have some 3 -4 mm thick copper strip 12 mm wide could i push that into the connectors and make up a bus bar for 3 - 4 sets of jack plugs, Surely it should be ok if they deliver that sort of power through the blades in "normal " use.
Obviously I would have to encase it and use suitable isolation methods.

Or does the house recommend soldering for a more reliable result.

Regards Clive

Offline PDR

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Re: High current power supplies
« Reply #51 on: July 15, 2012, 09:16:58 AM »
The answer is simply try it and see. Pull 45A from it and see whether the connection gets hot.

PDR
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Offline spillage

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Re: High current power supplies
« Reply #52 on: July 15, 2012, 12:54:42 PM »
The answer is simply try it and see. Pull 45A from it and see whether the connection gets hot.

PDR

I ran std spade connectors from my old car bits to a length of Hard Polyprop with 4 sets of banana plugs all linked together that is velcroed to the top of the unit. have run chargers for two 12v lead acid batteries and two chargers running at 3 amps each ... never missed a beat!!!

cheers Pete

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Re: High current power supplies
« Reply #53 on: July 15, 2012, 13:00:27 PM »
As I said above, I tested mine by running an ESC and motor at >50A, and had the same result (far better than the typical PC power supply which geneally wimped out with voltage sag at more than 10A).

PDR
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Offline rorywquin

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Re: High current power supplies
« Reply #54 on: November 14, 2012, 22:24:14 PM »
I have purchased a 60a 1200w SkyRC Efuel power supply.

It arrived yesterday, well packed, looks the job  :xx and even has the correct plug for Australian sockets.

It has had a couple of good reviews and a couple of guys at my club are happy with them.
I considered modifying some server power supplies but given the hassle getting them (I wanted 2 for 24v) here (Oz) the schlepp of doing the mod etc ....$239 delivered to my door seemed ok.

We have mains power at the club and anything beats lugging 2 x deep cycle car batterys to fast charge 4Ah 6S packs.

Offline Saxon

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Re: High current power supplies
« Reply #55 on: November 14, 2012, 22:52:06 PM »

Thanks again PDR.

Working a treat.

John

Offline vinnie

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Re: High current power supplies
« Reply #56 on: May 23, 2013, 15:24:50 PM »

Brilliant, I was just wondering about doing something with a cheap PC supply and now found two of these server PSU's for £15 on ebay, delivered!

Thank you PDR for the heads-up!  :af
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Offline Darkstar56

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Re: High current power supplies
« Reply #57 on: November 02, 2014, 17:16:20 PM »
 Thank you PDR.

Just made one up. Worked perfectly from the start.

I have not bothered to make it up for very high currents so just used 15A spades on the terminals, doubled up. I anticipate using about 8 amps max.

So much easier than PC power supplies.

Thank you again PDR and also to Gerry for converting the thread into an article.

Max
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Offline Andy_S_T

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Re: High current power supplies
« Reply #58 on: February 13, 2015, 09:41:15 AM »
Just been looking for a desktop power supply, gonna go looking on ebay for one of these now.

Offline pheasant_plucker

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Re: High current power supplies
« Reply #59 on: February 13, 2015, 15:51:45 PM »
Here's mine

Custom box from scrap wood. the dual volt/current display was a fiver on ebay.
the rockers are for power and fan speed which just needs leaving at a low setting unless your drawing a very heavy current.
I regularly run 5 chargers at 5a each on this.

ila_rendered                       ila_rendered

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Offline Cactus

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Re: High current power supplies
« Reply #60 on: February 13, 2015, 19:19:43 PM »
oooh thats a bit nice, i bought one of these today for me new shed when i get it done.
do you have a link for that display Gerry?
and what do you make of those LED bulbs?

Found the displays.
much more expensive, but this looks tempting.
Ebay 331466712772
« Last Edit: February 13, 2015, 19:41:31 PM by Cactus »
I know you believe you understand what you think i said, but i am not sure you realise that what you think you heard is not what i meant.

Offline pheasant_plucker

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Re: High current power supplies
« Reply #61 on: February 13, 2015, 22:19:52 PM »
Make sure you get a shunt with the display
Volt/Ampmeter

I bought the LED bulbs for the lights in the garden. Light output is excellent and these were warm white so it wasn't too clinical and artificial. Unfortunately they started to die very quickly. I suspect that they are over driven and have overheated but out of ten bought only 2 remain working in the space of two months.

Gerry
« Last Edit: February 13, 2015, 22:24:58 PM by pheasant_plucker, Reason: »
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Re: High current power supplies
« Reply #62 on: February 13, 2015, 22:38:23 PM »
sound like SMD 5050 leds, bright as hell but short lived

i got the shunt type, everything without was 10A only.
I know you believe you understand what you think i said, but i am not sure you realise that what you think you heard is not what i meant.

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Re: High current power supplies
« Reply #63 on: February 20, 2015, 09:48:53 AM »
Big thanks to Pete on this. Ordered one last friday, it arrived on Monday and I had it modded (the easiest mod of a power supply ever!) and running Monday night (about 10 mins!) and by Tuesday I had put extra plugs on it (20 mins) and I had three chargers plugged into it all charging away happily at 8 amps. All for under £20!

So a huge thanks to PDR!

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Re: High current power supplies
« Reply #64 on: February 20, 2015, 13:07:56 PM »
not yet started on mine, but i've now got the supply, digital read out, and just today thanks to some copper washers needing cutting i've got some nice 3mm copper sheet which i can cut two busbars about 15x100mm, perfect for a few chargers to croc clip onto
I know you believe you understand what you think i said, but i am not sure you realise that what you think you heard is not what i meant.

Offline leccyflyer

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Re: High current power supplies
« Reply #65 on: February 20, 2015, 13:15:48 PM »
Mine arrived yesterday - not sure quite how much use it'll get, since I charge at the field and it would be a change of methodology, that I'm looking at just now - but thanks for the very informative thread. :af
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Offline pheasant_plucker

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Re: High current power supplies
« Reply #66 on: February 20, 2015, 13:23:07 PM »
not yet started on mine, but i've now got the supply, digital read out, and just today thanks to some copper washers needing cutting i've got some nice 3mm copper sheet which i can cut two busbars about 15x100mm, perfect for a few chargers to croc clip onto

I just flattened some 8mm microbore copper pipe and used that.

Gerry
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Offline Darkstar56

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Re: High current power supplies
« Reply #67 on: February 20, 2015, 15:33:48 PM »
Mine arrived yesterday - not sure quite how much use it'll get, since I charge at the field and it would be a change of methodology, that I'm looking at just now - but thanks for the very informative thread. :af

I used to do that but now I do it at home whilst doing other things and spend time flying and not charging at the field. Also use the same chargers to do all my indoor flying batteries before I go.

I now do not have to worry about the state of charge of the big battery or lug it around. A definate bonus.

Max
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Offline dogshome

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Re: High current power supplies
« Reply #68 on: February 20, 2015, 20:09:34 PM »
Mine (without the incredibly noisy Delta fan) is powering the garage sound system.

Basically car amps and Morel speakers.

Cheers PDR  :)
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Offline PDR

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Re: High current power supplies
« Reply #69 on: February 20, 2015, 20:48:49 PM »
Did I mention that as these are *high quality* power supplies they have special detectors which trigger sprays of corrosive chemicals if used to power sound systems playing anything other than Pink Floyd?

PDR
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Offline SteveBB

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Re: High current power supplies
« Reply #70 on: February 20, 2015, 21:37:50 PM »
Did I mention that as these are *high quality* power supplies they have special detectors which trigger sprays of corrosive chemicals if used to power sound systems playing anything other than Pink Floyd?

PDR


You're not into Xanadu by Rush then? Or Birth and death of the day by Explosions in the Sky? Oh well....


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Offline HarryC

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Re: High current power supplies
« Reply #71 on: February 23, 2015, 13:53:11 PM »
Mine arrived this morning.
Forgive my humble naivety, but it is in a metal box, presumably it is thoroughly insulated from the electricity inside so there is no risk of shock from touching it when it is powered?

Offline PDR

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Re: High current power supplies
« Reply #72 on: February 23, 2015, 15:27:14 PM »
Mine arrived this morning.
Forgive my humble naivety, but it is in a metal box, presumably it is thoroughly insulated from the electricity inside so there is no risk of shock from touching it when it is powered?

The casing is earthed (thoroughly) so if any of the magic electrons escaped the internal insulation and made a bid for freedom via the case they would be coldly squashed down to a ground state before you could say "Donaudampfschiffahrtsgesellschaftskapitän".

Or to put it another way - yes.

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Re: High current power supplies
« Reply #73 on: February 23, 2015, 22:06:38 PM »
Seems happy playing Nazereth, Dokken and Udo so I guess they clear the PF-passmark  $%&

P.S. if swapping the 'incredibly noisy' 40mm Delta fan (similar to a B1 bomber on reheat in dB level) fit a ball raced medium speed fan. A 'whisper', 'quiet' or similar plain bearing 40mm fan won't satisfy the minimum speed detection.
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Offline Andy_S_T

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Re: High current power supplies
« Reply #74 on: February 24, 2015, 12:13:02 PM »
Swapping the fan is definitely on my list I think, it's okay in the garage but if I need to bring it into the house for any reason I can foresee some complaints!!

Offline Mike_T

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Re: High current power supplies
« Reply #75 on: February 25, 2015, 02:07:37 AM »
No need to swap the fan.  Shorting an additional pin to earth will reduce the speed substantially.

Also, connecting a 1k-Ohm trim pot across another two pins will enable you to adjust the output voltage up to 13.8V, but my experience is that over 13V it becomes a bit unstable and shuts down.

Here's the pinouts and some pics of mine (sorry - but the fan speed pin connection is shrouded in heatshrink):


Offline HarryC

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Re: High current power supplies
« Reply #76 on: February 25, 2015, 10:53:41 AM »
No need to swap the fan.  Shorting an additional pin to earth will reduce the speed substantially.

Presumably connecting PSKill pins 1 and 2 will do the job since pin 2 is grounded?

Offline pheasant_plucker

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Re: High current power supplies
« Reply #77 on: February 25, 2015, 11:43:36 AM »
Highlighting that image will probably help.

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Offline HarryC

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Re: High current power supplies
« Reply #78 on: February 25, 2015, 11:56:49 AM »
Ah got it thanks PP I had misread the drawing

Offline pheasant_plucker

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Re: High current power supplies
« Reply #79 on: February 25, 2015, 12:15:58 PM »
As did I when I modified mine!

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