Author Topic: alternator setup  (Read 13826 times)

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alternator setup
« on: February 03, 2008, 16:01:48 pm »
So here is my basic setup, it is not so nice to look at, but this is only to see the concept working.
Here below is the alternator which is connected to a driver ac motor (370watt) 2800rpm

As one can see exiting the alternator are 3 brown wires representing each phase. (Y connection). These wires are then connected to the 6pack rectifier which is shown outside behind the alternator (in pic)

The cell consists of six 9inch tall tubes with 2mm gap (all connected in parallel)
Basic dc tests with cell and straight dc voltages are:
5v   straight dc draws 2.6A
12v straight dc draws 8.74A

hydro

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Re: alternator setup
« Reply #1 on: February 03, 2008, 16:06:51 pm »
yeah, you have a nice setup there! you're going to love it!

are you having problems uploading pictures??

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Re: alternator setup
« Reply #2 on: February 03, 2008, 16:09:19 pm »
.

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Re: alternator setup
« Reply #3 on: February 03, 2008, 16:13:32 pm »
So lets begin with the first simple test : (cell not connected)
Connected a 5volt dc supply on the rotor, this gave me a current of approximately 1amp as you can see above.
So now lets spin the alternator and check with an oscilloscope the phases outputs from the alternator so to see that the alternator is working as it should.
Here below shows 2 phases from 3 on my oscope. (I only showed two because I only have 2 channels on my oscope)

The 3 waveforms are shifted by 120deg as the should. so they seem to be good. The peak voltage is about 15v as you can see. And the frequency of the sinewaves is 416hz.
(alternator is spinning at about 3800rpm).

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Re: alternator setup
« Reply #4 on: February 03, 2008, 16:15:50 pm »
Now lets see what is the output from the 6pack rectifier
Here it is:

As you can see here this is the output from the 6pack. The amplitude is about 22v peak. Please note that the cell is not yet connected.

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Re: alternator setup
« Reply #5 on: February 03, 2008, 16:17:31 pm »
Now lets see what happens when the cell is connected.
Here below I connected the cell and checked across it with the oscope:

Now that the cell is connected the amplitude dropped to about 5volts.
I did not measured the current through the cell yet because I don’t have a meter that reads more than 10amp maximum.
The cell takes 114 seconds to fill 100ml (not bad for only 5 volts on it)

Are these results good or is there something wrong from these initial tests?

Thanks guys
hmask

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Re: alternator setup
« Reply #6 on: February 03, 2008, 17:33:51 pm »
Now lets see what is the output from the 6pack rectifier
Here it is:

As you can see here this is the output from the 6pack. The amplitude is about 22v peak. Please note that the cell is not yet connected.

That seems normal. 22V on the output is ok

br
steve

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Re: alternator setup
« Reply #7 on: February 03, 2008, 17:36:53 pm »
Now lets see what happens when the cell is connected.
Here below I connected the cell and checked across it with the oscope:

Now that the cell is connected the amplitude dropped to about 5volts.
I did not measured the current through the cell yet because I don’t have a meter that reads more than 10amp maximum.
The cell takes 114 seconds to fill 100ml (not bad for only 5 volts on it)

Are these results good or is there something wrong from these initial tests?

Thanks guys
hmask


Ok buddy,

The voltage drop is high. If you drop from 22V to 5V, means to me that perhaps your WFC is pulling too much amps?
Can you show us some pics of your wfc?
And go arrange a good ampmeter. You will need it!

Br
Steve