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Author Topic: Igors switcher (EMF recycler2)  (Read 88862 times)

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #105 on: March 21, 2007, 07:31:28 PM »
Hi Gezgin, Gyula, Members,

Lastnight I made some measurements of the bulb hot.

Battery 6v lantern type.
Open voltage 6.32v
Bulb on voltage 5.86v
Series current .39A
DVM straight DC  :)
I guess its rated 2.5w @ 6v

drSpark
 

Okay, now at 5.86 Volts / 0.39 Amps= about 15 Ohms
resistance of hot glowing filament of the bulb.

Now please try to put a series resistor ( potentiometer)
in series with your 6 Volts latern battery
and bring it to the same brightness as your  bulb in the emf recycler circuit.
Now then calculate again the bulb filament resistance.
R= DC Voltage at bulb / current in bulb

Or better just use as I pointed out before 2 resistors ( 100 and 1 Ohm) and drop the bulbs
for the measurements.

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #106 on: March 21, 2007, 07:40:48 PM »
Hi People,

Gezgin,
Transformer version next week....

Stephan,
scope is warming up, it takes about 20mins for beams to find the zero or you chase zero around for 20 mins
ill dig for LARGE resisters that i can make 10 and 1 ohm resisters from.

drSpark

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #107 on: March 21, 2007, 10:14:12 PM »
Hi Stephan,

scope shots

drSpark

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #108 on: March 21, 2007, 10:19:40 PM »
Dr. Spark,
where is the 0 Volts line of the lower trace ?

There very down there where you wrote 0V  2V/ div ?

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #109 on: March 21, 2007, 10:20:34 PM »
Hi people,

I have 4-1ohm 10w and 2-8ohm 20w large resisters.
Can arrange into 2 10ohm resisters for voltage with 1ohm or 2ohm for current measurement.

Would they help make better scope shots?

Yes Stephan at bottom just below 0v.

drSpark

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #110 on: March 21, 2007, 10:32:23 PM »
Okay, now the result.

The input is about 10 Volts x 80 mA= 0.8 Watts.

The 80 mA can be seen, by folding the square wave
ontop the DC level to a steady value, so the voltage
gives about 8 Volts, if you integrate over all areas
of the cycles..
8 Volts / 100 Ohm is 80 mA.
You already heat via the input at the 100 Ohm Resistor
a Wattage of (8 Volts )^2 / 100 Ohm = 0.64 Watts.


Now output power at R2= 1 Ohm is
about (0.4 Volts)^2 / 1 Ohm= 0.16 Watts,
when you fold again all the areas to a steady DC level.

So the output is much lower than the input.

You can try different resistor values,
but without a transformer it would probably
always be output < input.

Regards, Stefan.

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #111 on: March 21, 2007, 10:32:12 PM »
Dr. Spark,
just try it again the other way around:
R1= 1 Ohm
and
R2= 100 Ohm.

This way it will make more sense,
as the 1 Ohm at R1 will only be a shunt to measure the
input current and not all input energy  is already heated
there.

Regards, Stefan.

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #112 on: March 21, 2007, 10:37:18 PM »
Thanks Stephan,

The bulb thru the 100ohms and the 2 10 ohm resisters one burning hot, sure had me fooled!

Ill still try the transformer circuit. Soon as parts arrive...

drspark

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #113 on: March 21, 2007, 10:39:48 PM »
Stephan

How does this explain the burning resister?

drSpark

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #114 on: March 22, 2007, 12:13:48 AM »
Stephan

How does this explain the burning resister?

drSpark
You seem to have used 0.25 Watts types resistors.
If you have used more power in one resistor,
it surely gets hot...

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #115 on: March 22, 2007, 12:28:23 AM »
Stephan,

both resisters are 10ohm 1/4W r1 cool r2 HOT


I am puzzled still  by only that

drSpark

Offline kcarrigan

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Re: Igors switcher (EMF recycler2)
« Reply #116 on: March 22, 2007, 01:48:34 AM »
Hello,
Back to your first circuit board (without inductors and replaced bulbs with 10 ohm 2 watt resistors). Measured c1 and c2, c3 and c4 in steady state. C1 & C2 are paralleled, C3 & C4 are in series. OK, the Paralled caps are 11.59 volts. C3 is connected to ground measures 3.51 volts and C4 measures 8.08 volts. Humm.  Turned on circuit switching.. measures the same. Placed a OSCOPE on caps. C1 lead always connects to ground, measures NO Chopped waves at all. Of course C2 did by about 5 volts peak to peak. What bothers me is that C4 is always lower then C3. Actually if left for a while, C3 will turn negative while C3 is positive - adding them up gives paralleled c1 & c2 voltage.

SO... maybe the inductance 'peaked' or distroyed my 50 volt caps...  going to order new ones, maybe about 8 this time, and keep the resistors in the circuit with no inductance.

Very strange... never seen a cap actually reverse it's self while slowly discharging.
v/r
Ken

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #117 on: March 22, 2007, 05:31:19 AM »
Hi People,

Stephan,
I made two of the 8ohm+2-1ohm 10ohm resisters, and somemore scope shots.

drSpark

Offline drspark

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Re: Igors switcher (EMF recycler2)
« Reply #118 on: March 22, 2007, 06:43:25 AM »
Hi People,

Here is a photo...

spark

Offline hartiberlin

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Re: Igors switcher (EMF recycler2)
« Reply #119 on: March 22, 2007, 01:40:28 PM »
Okay, Dr. Spark,
now with the diode and the 2 x 10 Ohm resistors,
things have changed.

You now have around 1.2 Volts at 10 Ohms= 0.12 Amps
input current.
That means you have around 10 Volts x 0.12 Amps= 1.2 Watts of input
from your battery.
Now you burning up at R1: (1.2 Volts) ^2 / 10 Ohms= 0.144 Watts of heat power.

Now at the output you have , when we fold and integrate the waveform
around 2.5 Volts at 10 Ohms, that means we get a heat power there of
(2.5 Volts) ^2 / 10 Ohm= 0.625 Watts.

So now you see, why one resistor burned almost up,
when you used just only 0.25 Watts types.
The R1 only comsumes 0.144 Watts , thus it is just lightly warm
and is lower than the rated 0.25 Watts.

But R2 burns almost up, cause it gets 0.625 Watts, which is more than twice
the rated 0.25 Watts...

But all in all the input power is much higher than the output power.

Please try it again with
R1= 1 Ohm and
R2= 100 Ohm.

Many thanks.

Regards, Stefan.