Smps 220vac / 13.8vcc For 100a

[albert_emule]

Hi everybody!

I want to make a power supply for my car audio system. For this, I need a 1.400W supply with 220Vac in and 13.8Vdc out 100A.
If anyone help me, I apreciate.

the pcb layout that was concebibo for symmetrical SMPS, being able to be 1 only:
http://img133.imageshack.us/img133/2966/placaprota.jpg


these photos, it is the toroides what I am using in the project:

http://img27.imageshack.us/img27/7297/dsc01240g.jpg

http://img89.imageshack.us/img89/5820/dsc01241x.jpg

http://img39.imageshack.us/img39/6488/dsc01242y.jpg

this one here, it is the schematic of the SMPS:
http://img17.imageshack.us/img17/4180/fullbridge.png


Thanks.

 

[Bootstrapper]

Pulling 100 A current out of the converter requires much thinking! For example the transformer windings will be very huge - even that leads to a large core. From your pictures it looked like the windings would not fit to your core. Do the calculations!

 

[albert_emule]

that not atija 100A, I want that it reaches the biggest current, which will be able with this toroide

 

[albert_emule]

what is the number of turns of the primary enrrolamento and the number of turns of the secondary enrrolamento, for this nucleus?

how must I proceed in the calculations?

Thanks.

 

[star882]

Open up the amp and find out what internal rail voltages it uses. Then build a power supply that outputs those voltages directly.

 

[odnaizutra]

hi Albert,how is your project?
As i m new in the block ,im thinking about beggin my project in half bridge using igbt +2110+3525 as initial form.Voltage controled regulated power supply.Im about using n27 toroid as main trafo and searching about output inductor,mainly because i will use high bank capacitance.
Have closed the regulation loop already?

 

[Eva]

You should avoid toroid SMPS transformers for offline applications. Proper insulation is hard to achieve and usually ends up degrading transformer performance well below the level of E cores.

Or you may do like that forum member that we know who sells a product where primary mains-live magnet wires touch directly with secondary wires.

A little scratch on the enamel and someone may end up injured or dead.

 

[albert_emule]

my SMPS is with 20A in 112vac, and 50A in 14.74VCC

WHAT CAN BE CAUSING THIS LOW PROFIT?

 

[Eva]

A calibrated power meter is required for efficiency measurements like that. Better than 1% precision is required.

Input current is a complex waveform, the current reading from a conventional multimeter is useless.

 

[albert_emule]

a voltmeter TRUE RMS, is it sufficient to meter the efficiency of the SMPS?

 

[Eva]

No

But if you have to ask that... Think a bit about voltage, current and power on arbitrary waveforms, this is elementary electronics.

I use one of these, it's nearly the most affordable solution, unless you want to do a calibrated power calculator yourself (it was a gift from a nice customer).

http://www.valhallascientific.com/wattmeters-power-analyzers/watt-2100-2101.shtml
http://www.bellnw.com/products/4578/

 

[star882]

If you're looking for a cheap power meter, there's a Kill-a-Watt that sells for about $30, as well as several Watts-up ranging from $80 to $250. I have only used the Kill-a-Watt, but it's a really good meter for the price.

 

[darkfenriz]

love that play on words

 

[star882]

love that play on words

It does exist, believe it or not.
http://www.p3international.com/products/special/P4400/P4400-CE.html

A friend actually compared it to a borrowed $800 Fluke meter and it was right on. (So for an extra $770, you mainly get a NIST certified calibration and fancy waveform displays. Not worth it for the typical experimenter. Just get the $30 meter.)