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OUPower.com • View topic - Bob wave form?

Bob wave form?

This forum is for discussing anything related to electrolysis and electrolyzer designs.

Bob wave form?

Postby wojwrobel » Thu Feb 23, 2012 3:20 am

hello

i have been looking for wave form that Bob saw when testing his boat anomalies

is there any way Bob you can draw exacly what you saw on the scope when boat was going crazy??

why im asking is because if this was both diod failure is sould be "elevated" sinewave
or
if this was one diod failure it sould be "elevated" and hi or low part of sinewave

so what exacly was the that

cheers from poland
wojsciech
wojwrobel
 
Posts: 4
Joined: Wed Feb 22, 2012 9:20 am

Re: Bob wave form?

Postby wojwrobel » Sat Feb 25, 2012 3:06 pm

OK

i have got it

so alternator have 3 phases, each is separetly recified but in his case one of the phases rectifier went short so we got elevated sine wave

something like this



but one more thing gets me thinking if the frequency is arround 42.8khz and we want to add some harmoniocs to increase effect we sould multiply this frequency like here

wojwrobel
 
Posts: 4
Joined: Wed Feb 22, 2012 9:20 am

Re: Bob wave form?

Postby wojwrobel » Tue Feb 28, 2012 6:10 am

but there is one more thing that dont fit !!! its the frequency as Bob said 42,8 khz or arround

ok engine drives from arround 700 to 7000rpminute so that is 7000/60=116 rpssecond then it drives an alternator thru belt gear 1-4 max so we have 116x4=464 rps at alternator wich have 15-18 poles at rotor that represents that each round will generate 18 cycle/round max so 464x18=8352 cycles per second wich is herts ??

so my question to Bob how he could reach 42000hz when alterantor can get only 8352hz???

i think it may be some harmonics that he later discover but on that video he says that when he connected the boate to oscilloscope he saw 42000hz??? how ??? maybe somebody have other ideas??

cheers from poland
wojsciech

Ron Poul 2012

fuck Romney!!!
wojwrobel
 
Posts: 4
Joined: Wed Feb 22, 2012 9:20 am

Re: Bob wave form?

Postby wojwrobel » Tue Feb 28, 2012 12:47 pm

ok i have tried with one phase shorted and i have to say its imposible to rotate the alternator it stops imidietly!!! so its not possible that its dead short on one phase

ok second step i took i have burned the diod and after diod is burned (it actually explodes) there is no connection meaning singnal from phase dont go any further than shorted diod

but each (phase) windings have two diod when one of them is burned (no connection) the other is still working and the phase on oscilloscope is EXACLY AS YELLOW PHASE except it has both parts positive (negative part is on top)
Image
the funny thing is that it doesnt matter which diod is burned it always showes the same effect

cheers from poland
wojscieh
wojwrobel
 
Posts: 4
Joined: Wed Feb 22, 2012 9:20 am


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