Author Topic: PWM schematic  (Read 12264 times)

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Re: PWM schematic
« Reply #24 on: December 10, 2009, 05:39:55 am »
interesting,

what are your thoughts on the drive speed of the alternator, constant? or might a variable speed control for the drive motor be useful to adjust the output frequency of the alternator?

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Re: PWM schematic
« Reply #25 on: December 10, 2009, 22:50:20 pm »
I tried to explain this to Kevin, and he built the chokes outside...


oh well, maybe next time, half a week til i start mine, i better order some diodes asap

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Re: PWM schematic
« Reply #26 on: December 11, 2009, 01:20:58 am »
constant speed is always best it removes one more variable in testing

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Re: PWM schematic
« Reply #27 on: December 11, 2009, 16:32:16 pm »
yea

My thought was just that varying the rpm will vary the frequency, maybe i should say "adjustable" frequency, rather than a constantly changing rpm, but an adjustable rpm would give an adjustable frequency, just like you have a Potentiometer on a pulsing circuit, and maybe you can find a frequency that the alternator works better at, just like chokes have a frequency that gives them a nicer output, the thing is you would have to have a scope hooked up to it to notice any change in wave form. maybe it wont do anything, maybe you can't even get into the rpm range where it would do something.

I keep wondering about this, no conclusion yet, so i'm just asking people about their experience and opinions, trying to learn. I do have a spare Variable Frequency Drive, if I hook it up to the drive motor I can adjust the rpm. It may or may not be worth the effort.

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Re: PWM schematic
« Reply #28 on: December 12, 2009, 05:46:51 am »
So Dudley , what about the 'ribbons' ?

 I must know so  I can  confirm Stephen Meyer stories .

Did it ribbon or show any anomalies @ all .




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Re: PWM schematic
« Reply #29 on: December 15, 2009, 17:00:49 pm »
Im getting a great waveform out now but still no gas !!!! grrrrrrr !!!!!

http://www.flickr.com/photos/45482143@N08/4187143663/

http://www.flickr.com/photos/45482143@N08/4187910092/

Any idea's ?

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Re: PWM schematic
« Reply #30 on: December 15, 2009, 18:23:43 pm »
Looks nice! nice set up.

is that output just from the alternator or are you pulsing it too?

Do you know what voltage and amps you are getting out?

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Re: PWM schematic
« Reply #31 on: December 15, 2009, 20:16:40 pm »
this is the setup :
http://www.flickr.com/photos/45482143@N08/4187689843/

im putting a square wave into the alternator ( kevin west's mod) , infact its totaly the same setup , same wave but no gas . He has no idea why either ?????
Im getting about 100v 1a out with the cell connected . Im totally flumoxed ???