confused

[precisiontek]

Ok

Lets say I have one stator wrapped with #14 wire

I am getting 140VAC at 30Hz.

I rectify this into a DC and I am now getting 130VDC with 5Amps

I have another stator wrapped with #10 wire..

I am getting 75 VAC at 30Hz..

I rectify this into a DC power and I am now getting 50VDC with 15 Amps

I series these two together after they are rectified into DC..

What will my sum of Voltage and Amperage be???

[drdongle]

Total amps would be 5, total voltage will be 180.

The reason the amps is only 5 is that the lowest out put will limit the out put of the whole system.

[mkseps]

My quick answer is 180 volts @ 5 amperes

Gene

[wooferhound]

How big are your Filter Capaciters ?

[precisiontek]

No Filter Capaciters....That bad??

[precisiontek]

Would it be possible to step the 180 VDC down to say 100VDC and increase my amperage?

[Gary D]

Could you split the 130 stator in half giving 65 volts and 10 amps? Then you'd have 25 amps@ around 50 volts? Depending on the voltage you're shooting for... better match possibly- just a thought.

[finnsawyer]

What do you mean by 5 or 15 amps?  Is that your short circuit current?  Or are the numbers reflective of the maximum current you can get with some predetermined load?  In point of fact #14 wire can handle up to half the current of the #10 for the same amount of wire and same conditions.  In short, your question is ambiguous as far as current is concerned.  Putting them in series will give 180 volts, however.  You should then determine the maximum working current by hanging different load resistors across the output and making sure nothing is over heating.

[precisiontek]

When I say 5 or 15 amps..I am referring to the amount of current be produced off each stator.

The stator with # 14 wire is producing less current(5 amps) verses the stator with #10 wire(15 amps)

The stators are identical with the exception of the size of wire..I cannot get as many wraps of the #10 as I can the #14 therefore creating less voltage....I maybe way of base here but I am thinking that to have the same amount of voltage with the #10 wire I need as many wraps as I do with the #14. this correct?

With less wraps of the #10 I will still have more current just not as much voltage.??

[finnsawyer]

You're still not stating how you are measuring the current.  What you get out depends on the inherent characteristics of the device (and how it's driven) and the characteristics of what it is connected to.  Even when you measure short circuit current you have a device connected to the output, namely the ammeter.

You are more or less correct about adding more windings. I'm hedging my bets here because more of the flux may escape capture in that case (physical constraints).

What I'm reading here is that you have a certain voltage and current in mind.  You certainly can rewind either or both stators, but I can't guarantee that so many windings will give so much voltage and current.  About the only thing you can be sure of is that replacing the #14 wire with the same amount of #10 as in the other stator will give you the same performance (50 volts at 15 amps?).  It would seem that if you wish to get a total of 120 volts in that case you need at least 20% more windings on each.  This will be close, but might fall slightly below because of greater leakage.  You should allow for that possibility.  The current out may be near 15 amps but somewhat less.  There is no free lunch, just trade offs.

[precisiontek]

I am measuring the current with an inline fuse....The only means I have...I am consitently blowing 5 amp fuses but it will not blow a 7-1/2 amp fuse....

This is coming from a stator with 8 coils 50 wraps of #14 wire per coil..I get on average 12volts per coil....

[ghurd]

But what is it connected to?

What is on the other end of the wires from the alternator?

Just dead shorted out with the fuse?

Running a couple car headlights?

[wooferhound]

It has been pointed out that you cant measure the voltage correctly if you don't have some large filter capaciter on the output of Your bridge rectifier. At the same time a filter capaciter will raise your voltage by 40 percent.

[precisiontek]

A dead short between the fuses

[ghurd]

That is measuring only how much it can make dead shorted, 0 watts.

The volt reading is with no connection between the ends?  Except the V meter?  That is 0 watts too.

Volts times amps equals watts.

So far you have made no power. 0 watts. Either no amps or no volts, thats still 0 watts.

Probably need something with a known resistance or power consumption at the end, instead of a fuse.

Then measure the amps and volts.

If the volts is too low for the use, raise the resistance of the load.

When the volts is closer to the volts you need, then amps times volts is about the watts you can expect under similar circumstances.

Try an #1156 bulb, a headlight, 60w 110v bulb, flashlight bulb... but something!

Popping bulbs is fun!

Then, maybe, someone can ball park the watts at other conditions.

G-

[ghurd]

But if this is that linear thing you might be on your own.

- 30hz seems kind of fast

[finnsawyer]

If he is measuring open circuit voltage and short circuit current the ratio of voltage to current in that case gives him the value of the internal resistance of the alternator.  Here's a suggestion for him:  Replace the fuse by a small value (one ohm) high wattage resistor and measure the voltage across the resistor.  If he is getting 5 amps the resistor must handle 25 watts of power.  He probably would be well advised to get a book on basic circuit theory and study it.