Recent Posts
91
evostars / Circuit board upgrade
« on November 30th, 05:06 AM by evostars »
et voilà
a new updated circuit board
with  Mur1660CT and added d4 and d5 to bypass the mosfets body diode
92
evostars / Adding d4 d5 Mur1660CT
« on November 30th, 04:21 AM by evostars »
replac8ng all mur460 diodes with Mur1660CT

also adding d4 and d5
d4 blocks positive so body diode isnt used. instead d5 is used to pass positive voltage
93
evostars / Re: new oscillator circuit shared By Nelson Rocha
« on November 30th, 03:04 AM by evostars »
changing c1 from 500pf to 1nf,
with c2 being 5nF,
makes it possible to line the 2 spikes up closer.

but I'd rather make c2 smaller, instead of c1 bigger, as i want the spikes to have a less than 1uS duration.

I suspect the body diode being the limiting factor.
94
HHO / Browns Gas / Hydroxy / Stan Meyer / Tesla Vs Stanley Meyer Open ended Coils
« on November 29th, 08:03 PM by securesupplies »
Tesla Vs Stanley Meyer Open ended Coils

I found this post I share it here

Dan
95
evostars / bypassing body diode
« on November 29th, 02:12 PM by evostars »
putting a parallel faster diode across drain source, would need another diode in series with the source to pass the positive voltage from the powersupply, but block the positive voltage from l1 to the source/body diode.
the positive voltage from l1 than passes via the parallel diode to the drain/c1/c5.

these diodes are faster and better suited for the task than the body diode is
96
evostars / Re: new oscillator circuit shared By Nelson Rocha
« on November 29th, 12:46 PM by evostars »
I wonder if there is an easy method of finding the right parallel capacitor (c6) for L2.

I might put a 50% duty pulse on L2 (circuit disconnected) and tune L3. to get an estimate
97
evostars / Re: new oscillator circuit shared By Nelson Rocha
« on November 29th, 12:32 PM by evostars »
i need to try to make c1 slightly bigger   so the positive spike lines up with the negative spike (giving both equal duration).

this would result in a longitudinal dielectric pressure field as the L2 coil creates a 560V dielectric field pulse during 1uS
98
evostars / Re: new oscillator circuit shared By Nelson Rocha
« on November 29th, 12:25 PM by evostars »
making c5 smaller would make the negative spike shorter in duration, but the body diode seems to restrict this. resulting in a positive voltage bump (as seen before with the 41w 230v load).
5nf c2 is the smallest, where the bump disappeared.
having a parallel diode over source and drain might enhance this.

C1 is influencing the positive spike. if made bigger, it als gave a positive bump. maybe, now c2 is bigger, c1 could be made bigger, giving a more equal positive and negative spike on L2
99
evostars / Got it tuned
« on November 29th, 10:48 AM by evostars »
good results!

made C1 500pF
made C2 5nf
c3 33nf
c4 2.3uf
c5 44nF
0.5A 22.1Vdc f=81kHz  probes 10:1 DC coupled 100mV/A current probe
21w load on L3 l3 not grounded

at 81 khz I have lamp on, 3.25A pp on L3.
L2 shows positive spike +380V on c5 side
and l2 c4 negative spike is - 240V
Giving L2 total of around 570V. although the pos and neg spikes aren't perfect aligned. This should give the dielectric field og th bifilar pancake D2 a pretty good pressure.

I wish, L3 can tune to this pressure front. with a parallel cap. giving parallel resonance between L3 and L2 This is a high q resonance, so tuning is critical. 1nF steps could make a big differnce.

newfile1 yellow = L2 C5  blue= L2 c4
newfile2 same as 1 zoomed out

newfile3 blue is L3 current  yellow is L2C5
newfile4  yellow is L3 inside rim
newfile5 yellow is L3 outside rim



100
evostars / Re: new oscillator circuit shared By Nelson Rocha
« on November 29th, 05:07 AM by evostars »
What I have seen, is the recirculation of electric energy.

it enters via D3 throught the mosfet into the magnetic field of L1.

The mosfet stops conducting.

the magnetic energy of L1 is transformed into back emf(-V) , charging c2 c3 c4 and c5 and even L2.

C2 is resonant with L1. becomes positive, and opens up the body diode of the mosfet, charging c1 and c5.

L2 and c5 become series resonant. producing high currents in L2.

Still... there is one more thing needed.
A solid powerfull less than 1uS discharge in L2.  could c1 play a role? I could make it smaller, so it charges faster, maybe as big as c5 is.