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Old 9th September 2005, 08:57 AM   #1
bowdown is offline bowdown  Australia
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Default 12v regulated toroidal charger high current

Hi guys i have searched high and low for the last 3 days on this subject. I need a regulated 12-14v power supply at between 150-200 amps. I would like to use a toroidal transformer then regulate the sec outputs somehow. Can some one please be kind enough to show me how to do this. I work for a caraudio shop and we have lots of trouble finding really good big power supplies for our demo cars, so i decided i could build something. please let me know what you guys think.

Cheers

Bowdown
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Old 10th September 2005, 03:37 AM   #2
bowdown is offline bowdown  Australia
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Maybe someone could help me with a link even?? Ca i just use a pass regulator with heaps of outputs??


Please help


Regards

Bowdown
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Old 10th September 2005, 05:41 AM   #3
BWRX is offline BWRX  United States
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A bunch of good deep cycle automotive/marine batteries in parallel ought to do the trick, and would probably be the cheapest way to do what you want, but you'd eventually need to recharge them (and you probably already know that ). Try reading over this thread: 0-15V 0-120A adjustable PSU attempt with average current control.
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Old 10th September 2005, 06:01 AM   #4
bowdown is offline bowdown  Australia
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Hey thanx bwrx for the link i will read it. Oh by the way does anyone know what the difference between a battery charger is and a power supply?? Cant i just use a toroidal with a 10vac sec and run it thriugh some rectifers and caps to give me 14v? or do i have it totally wrong??


Thanx

Bowdown
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Old 10th September 2005, 06:37 AM   #5
BWRX is offline BWRX  United States
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Do you mean an automotive battery charger? They just charge the batteries to a set voltage over a period of time and aren't designed to supply large amounts of current or respond to transient power demands. A dedicated power supply, on the other hand, should be capable of delivering adequate power under various loading conditions.

Also, about the link. You may want to get in touch with Eva as he is the one who built the power supply in that thread and appeared to be using it for a similar purpose (car audio applications). I didn't read through the whole thing either but the thread title was enough to know that it may be of use to you.
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Old 10th September 2005, 06:46 AM   #6
bowdown is offline bowdown  Australia
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Yeah an automotive charger. See the problem is i have 5 battries in the car and they can be disconnected to the power supply/ charger needs to be connected to the battries as well.I got some quotes and they want like $1000 for an 80 amp charger and i really need like 150 amp which means its gonna cost $2000 .


thanx again for such wanderfull and helpfull people on this forum


regards

Bowdown
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Old 27th September 2005, 02:51 PM   #7
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Old 28th September 2005, 05:22 AM   #8
bowdown is offline bowdown  Australia
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Sweet thanx DigitalJunkie for that link, will look into it and might just have to go that way.

Regards

Bowdown
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