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Thread: Trying to Throw Stuff Out...
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5th Sep 2021, 07:33 PM #1Diamond Member
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Trying to Throw Stuff Out...
I've had this battery charger sitting under a bench for about 10 years, thinking that at some point I'd find a use for it. I believe it came from a phone exchange - it puts out ~52V DC at 50A. I've never looked inside as I didn't expect there'd be anything interesting.
Pulled it out today, opened it up, and it's pretty much what I expected, except for it using 3 transformers (two more than I assumed). Still, for the life of me, I cannot think of a use for any of it, except perhaps for the meters. Can anyone think of a use for any of what's there?
IMG_0017.jpg
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5th Sep 2021, 07:53 PM #2Most Valued Member
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50vdc/50A might be useful for the drive power supply of a CNC project.
What voltage/current do spot welders need?
Steve
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5th Sep 2021, 08:01 PM #3
If you do get rid of it you will find a use for it in the following 4 weeks.😂
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5th Sep 2021, 09:35 PM #4Golden Member
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Electrolysis rust removal, anodizing? gotta be some good use for it !
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5th Sep 2021, 09:40 PM #5Philomath in training
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6th Sep 2021, 09:27 AM #6Pink 10EE owner
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Power supply to power a 48V induction heater.
https://www.ebay.com.au/itm/123392293107Gold, the colour of choice for the discerning person.
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6th Sep 2021, 11:37 AM #7Senior Member
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Some of the "transformers" may be "chokes." Or does it need a three phase supply?
Uses:
1. Battery charger for your "off the grid" solar installation;
2. Supplying 50v to your DC motor on your surface grinder;
3. Supply 50v to your gear reduction drill press / tapping chuck / lathe.
Probably need a battery connected across the supply to make the charger regulate the output voltage.
Does it work?
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6th Sep 2021, 01:39 PM #8Diamond Member
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Had a bit of a closer look - two of what I thought were transformers are ginormous inductors. One of the smoothing caps is leaking - I'm a bit scared to turn it on in case they explode...
I checked to see how a modern switcher would compare - a Meanwell 48V 50A would cost about $700, weighs 3.3kg and is over 90% efficient once above 70% load.
This thing must be close to 100kg and its rated consumption is 4,100W for 2,600W output, which means at full load, it doubles as a 1,500W heater
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6th Sep 2021, 05:31 PM #9Senior Member
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But you live in Canberra! You would always need a heater in the workshop..... to say nothing of that soothing hummmming sound!
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