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Author Topic: Igors switcher (EMF recycler2)  (Read 88863 times)

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #150 on: April 09, 2007, 11:17:57 PM »
Dr.Spark,
looks good.
Yes, don?t use too many windings on the core.
Then you can go to higher frequencies and still have
a good and fast current rise in the coils
and a good power transfer.
Looking forward to the scopeshots.

Regards, Stefan.

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #151 on: April 10, 2007, 02:24:38 AM »
Hi People,

Scope shots of the circuit running in photo
FETs get hot now, from the top down Q3 real hot Q4 hot Q5 warm,
adding 50k like Gyula sugjestion helped but did not fix

drspark

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #152 on: April 10, 2007, 02:49:00 AM »
Igor

On paper/drawing/sim, Convert your circuit to 4 or more FETs and I will build it.
Must be solid state to make 20khz and beyond.

drspark

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #153 on: April 10, 2007, 04:54:58 AM »
Hi People,

I have moved the R1 measurement point back to a series resister with the source. A DC value, 0.4v across 1ohm is observed at 9.95v.

An observation that I dont understand:
I have the wire from the D1 that feeds power to the cap bank top C1, in hand. When I touch it to the top C1+ the circuit charge and run, BUT when I disconnect it, the circuit surge in output before it discharge and die, when I touch it to the top of C3+ cap the circuit charges and runs... and when I disconnect the circuit discharge no surge and dies.

This is behaviour inline with original reed relay circuit, where power was only connected every so many cycles, for one cycle.....

No idea what this is doing to the FETS.... Tapping the wire as fast as I can results in a erratic mostly continious surge!

A counter chip can controle a relay to do that to this once every 5000 to 10000 cycles for x cycles :)
(surge lasted 1/4-1/2 second)

drspark

« Last Edit: April 10, 2007, 05:15:03 AM by drspark »

Offline mhackgyver

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Re: Igors switcher (EMF recycler2)
« Reply #154 on: April 14, 2007, 11:55:09 AM »
I have done your "EMF recycler V3", but what is ?.ic? ?

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #155 on: April 15, 2007, 02:10:04 AM »
Hi mhackgyver,

The .ic tags look like sources but really are Inital condition setings.
Used in the monovibrator to help the sim simulate an oscilator.
also used to precharge the cap in the selfrunning sim circuit.

drspark

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #156 on: April 15, 2007, 02:58:50 AM »
Hi Dr. Spark,
at the scopeshot:
3fett1_10ohma.jpg

you get about (4 Volts)^2 / 10 Ohms= 1.6 Watts of output power.

But what was the input power at R1 in this case ?

Many thanks.
Regards, Stefan.

Offline mhackgyver

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Re: Igors switcher (EMF recycler2)
« Reply #157 on: April 20, 2007, 12:46:17 PM »
I've build that:

(http://mhackgyver.free.fr/10.jpg)

and the result:

R1:
(http://mhackgyver.free.fr/R1.jpg)

how that can be possible after the diode?


R2:
(http://mhackgyver.free.fr/R2.jpg)

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #158 on: April 21, 2007, 03:18:25 AM »
@mhackgyver

probably your diode does not work anymore.
YOu have about 0.12 Ampere average input current, thus at 10 Volts
1.2 Watts input.
Your output at R2 is about (3.5 Volts)^2 / 10 Ohms= 1.225 Watts,
so the graphical interpolation could be a bit less or more, so
it seems what you put in is also
coming out at R2, so this is right.

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #159 on: April 21, 2007, 03:21:01 AM »
Hmm,
what I just wrote is not right...
Where exactly is the zero line of the input voltage at R1 ?

If it is in the center of the square waveform,
then when the current is negative,
we could have a charging of the battery,
if the other multivibrator circuit is not broken...
Strange,
please check the diode and the rest of the circuit.
Thanks.

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #160 on: April 21, 2007, 07:44:56 AM »
mhackgyver,

Great Work!
you replicate also!

Your R2 should be >4x temp compared to your R1.
Both are circuit outputs...

drspark

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #161 on: April 21, 2007, 10:41:40 AM »
Hi People,

Here the sim calculates COP, power across R1 and R2.

The outputs A and C on 3fetcopraw.jpg are what you see on a scope.

Notice circuit change, right side of R1 connects to right side of R2.

drspark

Offline vala

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Re: Igors switcher (EMF recycler2)
« Reply #162 on: May 13, 2007, 05:16:35 PM »
Hi People,

Here the sim calculates COP, power across R1 and R2.

The outputs A and C on 3fetcopraw.jpg are what you see on a scope.

Notice circuit change, right side of R1 connects to right side of R2.

drspark

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #163 on: May 13, 2007, 06:03:04 PM »
Dr. Spark,

do you have also a graphical output file
from your CKT text simulation file ?

I don?t understand your new setup...

Why don?t you use a transformer ?
Why the change with the connection of R1 and R2 ?

Please explain more.

Many thanks.

Regards,Stefan.

Offline vala

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Re: Igors switcher (EMF recycler2)
« Reply #164 on: May 13, 2007, 06:34:01 PM »
ok