How to control voltage?

[amiklic1]

Does anyone know where to find some voltage regulator schematics, some as used in car alternator, so I can regulate voltage output in some range 12-14 V or so, and that input voltage can be wider range.

Hope someone undestands this.

Thanks, folks!

[johnlm]

Please be a bit more specific on what you want.  A voltage regulator used on  car alaternators does not directly regulate the output of the alternator down to 12-14V, it instead regulates the current into the field winding to control the alternator from putting out higher than the needed 12- 14 volts.  This may not be what your wanting or thinking of.

If you are looking for low powered (in the area of 1 Amp or less) to be regulated down from a higher voltage (as you imply regarding the input) then simple 3 terminal regulators either fixed (LM7812) or adjustable (LM317) are choices to consider.  if you are looking for higher current there are 3 amp and 10 amp versions of these linear regulators.  However if you are wanting  a higher current than an amp or 2 you might want to consider switching regulators which would be more efficient.

Before someone goes to the trouble of searching for a schematic or whatever for you you might want to be more specific in your needs.

Johnlm

[wooferhound]

What do you want to feed your regulated power to ?

What voltage are you starting out with ?

[amiklic1]

I want to make the circuit that regulates voltage, and keeps it at , let's say 12V, even if the input voltage is from 12- 25 volts, or so.

Also, what would be the power loss in such device.

Sorry for bad english, it is just not my mother language.

Does anyone have experience with MSK 5020-12.0 regulators? It is 12V / 20A !! regulator, but i couldn't find data about input voltages.

[drdongle]

What kind of load amps are you expecting to see?

[Chiron]

http://www.mskennedy.com/media/documents/5020rf.pdf

[drdongle]

Looks like they market to the Military/Aerospace industry, will be HIGH dollars stuff.

[Chiron]

Also the commercial and utility power industry.

[wooferhound]

a battery will regulate the voltage to a point

the voltage will stay at the battery voltage while the battery gradully charges. Of course you don't want the battery to charge much over 14 volts. If you are trying to regulate the voltage for charging then maybe you don't really need a regulator . . .