### Author Topic: How to find the efficiency of a fuel cell  (Read 25310 times)

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• Jr. member
• Posts: 44
##### Re: How to find the efficiency of a fuel cell
« Reply #48 on: May 08, 2008, 05:18:56 am »
Hydrocars or anyone that has used oscilloscopes much, when you put a signal into the rotor should it look the same coming out of the stator? Today I played around with different frequencies and I can see the wave going into the rotor with my scope. The problem is that I can’t find any clear frequency waves coming out of the stator. Tomorrow I will try my Lawton pulse circuit and see if it’s any different.

#### hydro

• Guest
##### Re: How to find the efficiency of a fuel cell
« Reply #49 on: May 08, 2008, 05:45:13 am »
well, no the signal comming from the stator is different than the signal put into the rotor.

you can pulse the rotor with square waves and the stator will show some form of sine waves depending on the electronics used to pulse the rotor. 98% of the circuits on the internet is single pulses into the rotor, so if you was to hook a timer and fet to the rotor what you would see on the oscilloscope to the rotor would be a half sine wave then it would drop like a discharg wave. it would look like a hill on the left side and a slide on the right. this is the 98% single sided square wave pulse.

this is because the square wave will charge the coil, and coils have resistance,, therfor it takes time to charge a coil to its peak. This is where you see the half sine wave, now when the pulse is removed you will see a discharge wave from the rotor, it looks like a slide, kinda like a hook. On the stators output you will always see full sine waves.

Single phase is single phase, when you use the timer with a fet to pulse a rotor you are pulsing at half phase, not even 1 phase.

what you would see on the oscilloscope when on the rotor is the timer making half phase wich replicates the ("first half of the sine wave"), the ("fet will switch off") and the rotor will create ("back emf"), the ("right hand side of the sine wave"). but its not a sine wave, ("its a dishcarge wave,")  from the rotor discharging.

the alternator has a 3 phase output, even if its full wave rectified, so if you was to hook a oscilloscope to the stator then you will see 3 waves. each wave rides ontop of the other, Google 3 phase sine wave to find a picture of what this looks like.  There will be a time when you get square waves from the stator with 3 phase DC harmonics on the top. confusing enough?

« Last Edit: May 08, 2008, 07:39:11 am by hydrocars »

#### hydro

• Guest
##### Re: How to find the efficiency of a fuel cell
« Reply #50 on: May 08, 2008, 05:53:42 am »
i would like to add, to those of you using my circuit, as i said it is half phase, not even 1 phase. you take this circuit and you make it 1 phase, your gas production will go up even higher, i think i got this effect at resonant, but if i would have used the 1 phase circuit wich is very complicated then i would have gotten even better results.

when you only pulse 1 side of a transformer thats hooked to the cell, well your only making so much gas off that pulse, if you add an adjasent primary pulse Unlike what ("everyone") has been doing, gas production will rise.

« Last Edit: May 08, 2008, 06:21:12 am by hydrocars »

• Member
• Posts: 223
##### Re: How to find the efficiency of a fuel cell
« Reply #51 on: May 08, 2008, 12:27:43 pm »
Hi Karebill.

set a frequency of 2khz on the amplifier , hook a 4v supply in series and connect to the rotor. Disconnect the 6pack rectifier from the stator. Spin the alternator , Check what`s on one of the 3 phases of the alternator with the oscope.  post a pic of it please.
« Last Edit: May 08, 2008, 20:54:58 pm by hydrogenmask »

• Jr. member
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##### Re: How to find the efficiency of a fuel cell
« Reply #52 on: May 09, 2008, 02:26:04 am »
Hydrogenmask I cant easily unhook my diode pack because they are internal (Too days ago I modified my alternator like the mer wfc test drawing to see if it made a difference. Mine is now a 3 pack I removed the other three and have a neutral tap off the center) I will add a test wire before the diode to view it and post pictures this weekend. I think if the 4v supply in series works there should be no reason I couldn’t duplicate a three or four phase freq. signal to send to the rotor using all four channels of the amp.

#### hydro

• Guest
##### Re: How to find the efficiency of a fuel cell
« Reply #53 on: May 09, 2008, 05:03:09 am »
keep up your good work karebill, testing is understanding!

• Member
• Posts: 223
##### Re: How to find the efficiency of a fuel cell
« Reply #54 on: May 09, 2008, 08:43:52 am »
(Too days ago I modified my alternator like the mer wfc test drawing to see if it made a difference. Mine is now a 3 pack I removed the other three and have a neutral tap off the center)

This is the connction you are using now Karebill ?
Without the resonant charging chokes and with only 3 diodes?

hm