Cap dumper replication ( Visse/Matt Circuit )

[Bhargav]

Hey Visse and Matt ,
Thanks for your support and posting the cap dumper circuit on the bedini ferris wheel thread . Iam replicating it today . The voltage value on the capcitors werent available here and the changed cap values are in the attached circuit . Do let me know if you have any inputs . I will post my progress here as i didnt want to detrack the Bedini ferris wheel thread .

Thanks ,
Bhargav

[Bhargav]

First experiment

First experiment with a 44V smps DC power supply connected to the 4700 ufd capacitor resulted in 6 amps straight DC flowing throught the circuit without the pulsing action . The led on the SSR didnt light up . Also the capacitor connected on the SSR input side had its voltage raised to about 0.6V which is insufficient input ...

Matt commented on a query on his youtube video :

" The one I was using is a 10,000 uf 125 volt. If it says 1000 thats a typo. The voltage needs to be 2-3 times higher than the discharge bank. "

SO , next up iam going to drive the voltage up in the cap to about 120V( 36 x 3 =108 ) using a monopole and see if it raises the voltage in the SSR input cap .

Bhargav

[Bhargav]

Puff sound from the circuit

While experimenting , i just heard a puff sound but cant see anything wrong with the caps . Is it the caps making that sound ? Is there a way to verify if the caps are working fine ??

I raised the voltage source to 150 VDC with an smps system but the voltage on the 4700ufd capacitor still remains at 51V with no pulsing . Same on the batteries , as the voltage is too high for a 36V battery pack - i disconnected the circuit just when i heard the puff sound .

Any suggestions?,
Bhargav

[nvisser]

Bhargav
You cannot do it like that
With a constant 44V dc supply your cap (which is way to small ) will stay charged all the time and Switch (ssr) will be on all the time.
You also must not allow your cap to charge up above its rated voltage as that is all it can handle . If you connect a 100V rated cap to 150v dc it will make a puff sound . You can throw that one away. It should look pregnant now.
You need to test this circuit with a radiant source like a SSG that charge the cap up in steps over a short time to the correct voltage. When the cap reach that voltage the SSR will switch and dump the cap to the battery.
For your test use only one 12V battery as charge battery and replace the zener with a 8 or 9V zener. Than the ssr will dump when the big cap reach about 24V. ( Bat V + 9V zener + 3v drop over SSR = 24V)
Use 3 of that 4700uF 50V caps in parallel. That will give you a cap bank of 14100uF.
Hope this helps
Vissie

[Bhargav]

not pregnant!!!

Thanks visse ... Just hooking the cap dumper to the one wire 10 coiler setup . Whats funny though is that the caps dont look pregnant.... lOl and also the led on the ssr didnt light up . Any way you know to check the caps?

I just burnt my 15 th MJL21193/94 on the bipolar circuit ... Those blooming tranny's cost over 10$ each . Hooked up the window motor to 10 coiler and hopefully i will get to dump the cap ...

Is it normal for the 14100 ufd cap that you suggested to be at the same voltage as the battery without any extra radiant source connected ?

One more question : What will happen if we just connect a cap in front of a battery and let the radiant charge into the cap ? Theoritically the cap voltage should go up and the excess charge must get dumped into the battery right ? I presume the problem is that the voltage in the caps wont be 2 volts over the battery discharged voltage ... am i right?

Bhargav

[nvisser]

The cap cannot discharge to a lower voltage than the battery voltage.
Your bipolar circuit should not blow up. Rather use cheap transistors till you got the problem sorted out. The bipolar circuit must run cool.
You do need to charge the cap up before you dump it.

[nvisser]

double post