Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

I completed this circuit and this replication.

After the secondary LC (L 80 turns/75uH, C 13 * 10nF = 131nF) i put a Full Wave Bridge Rectifier (FWBR) consisting of 4 * UF4007 diodes.
This gave me pulsed (half sine) DC of about 180V.
Using a 40uF capacitor (50Hz type    ) to smooth this, gave me 180V (172V RMS) DC which was fet into my 230V / 60W bulb.

The screenshot below shows the scope signals during this:

yellow trace = DC voltage across bulb
blue trace   = voltage across a 0.1 Ohm 1% resistor (as csr)
Red trace    = is math function Ch1 * Ch2

As i use a 0.1 Ohm csr, the current through this csr is calculated as I= U/R, meaning that the current through it  = 10 times  the voltage across it.
This also means that the calculated result of the math function needs to be taken times 10 to show the actual wattage.

The input from the battery was calculated to be 83W (23.8V * 3.5A) and the output across the bulb was 39W meaning an efficiecy of less then 50%.

The signal across this csr (blue trace) puzzeled me as i expected to see there also some dc voltage/current (instead of the positive sine wave like signal).
Could it be that the CSR used and/or the spiral filament of the bulb and/or the lengthy ground lead of the probe and/or the 50Hz smoothing cap have caused this?


Basically it is a poor DC to DC converter, and perhaps with some carefull tuning this can be improved somewhat.
Final test was to run my 550W electric drill on this DC which it did, however i probably would not be able to drill a usefull hole with it.

Video here:  https://www.youtube.com/watch?v=-0n_Sv1bdJQ&feature=youtu.be

Regards Itsu

[magpwr]

I completed this circuit and this replication.

After the secondary LC (L 80 turns/75uH, C 13 * 10nF = 131nF) i put a Full Wave Bridge Rectifier (FWBR) consisting of 4 * UF4007 diodes.
This gave me pulsed (half sine) DC of about 180V.
Using a 40uF capacitor (50Hz type    ) to smooth this, gave me 180V (172V RMS) DC which was fet into my 230V / 60W bulb.

The screenshot below shows the scope signals during this:

yellow trace = DC voltage across bulb
blue trace   = voltage across a 0.1 Ohm 1% resistor (as csr)
Red trace    = is math function Ch1 * Ch2

As i use a 0.1 Ohm csr, the current through this csr is calculated as I= U/R, meaning that the current through it  = 10 times  the voltage across it.
This also means that the calculated result of the math function needs to be taken times 10 to show the actual wattage.

The input from the battery was calculated to be 83W (23.8V * 3.5A) and the output across the bulb was 39W meaning an efficiecy of less then 50%.

The signal across this csr (blue trace) puzzeled me as i expected to see there also some dc voltage/current (instead of the positive sine wave like signal).
Could it be that the CSR used and/or the spiral filament of the bulb and/or the lengthy ground lead of the probe and/or the 50Hz smoothing cap have caused this?


Basically it is a poor DC to DC converter, and perhaps with some carefull tuning this can be improved somewhat.
Final test was to run my 550W electric drill on this DC which it did, however i probably would not be able to drill a usefull hole with it.

Video here:  https://www.youtube.com/watch?v=-0n_Sv1bdJQ&feature=youtu.be

Regards Itsu

hi itsu,

Oh dear it seems the youtube video you have just uploaded is marked as private .My youtube user id:"sanjev21"

It will look as if the conversion efficiency is inefficient if you are not using matching resonance between primary and secondary.

But my experiment with Don smith secondary coil at 1/4 L/C resonance frequency from the primary revealed surprising finding during short circuit test at output which would not produce serious notable effect primary current drawn.Testing was done with low voltage.


I will start uploading into youtube once i have created PCB(photoresist) from transparency printout related to Don Smith China replication which is related to high voltage &high frequency.
It's difficult to get certain stuff locally on an island which slow things down.

Don smith China replication(Video copied from original uploader before it was removed in China)

www.youtube.com/watch?v=vowN5BFGW1c

[T-1000]

@itsu

On the current scope diagram I see spikes in the sides of sine waves and I think this is a cause of your problem with low COP. When it is in resonance the spikes should be on 0 and 360 degrees instead(the zero amps crossing and the tops and bottoms on voltage diagram).
To me it looks you are not getting 2 resonances work with each other and there are difference on resonant frequency in both.

Also the capacitors should be ones same type as what are used in Tesla coil for spark gap discharge - they have to handle short circuit and to be capable to discharge much power as possible.

If to progress further, it is crucial to have proper setup before adding 2nd generator into another primary for nanosecond pulses like in Dally case.

Hopefully that will help...

Cheers!

[itsu]

Thanks guys for your comments.

Video is now available

Concerning the resonance of the both coils, this is suppose to be a Mazilli circuit which adjust its frequency according to the load.
We see that this unloaded circuit resonantes on 40Khz and it adjust itselve to 36Khz when the secondary coil is inserted.

So the primary loaded circuit (mazilli) now resonates around 36Khz and then i adjust the secondary coil with its caps (adding/removing) for max. voltage/brightness
of the bulb which means max. energy transfer (matching) and resonance.

I can not adjust the primary mazilli resonance frequency independently from the secondary coil (if so, please tell me).

Concerning the spikes and the positive sine wave like signal of the current, well i think thats more due to the involved inductances of the bulbs filament,
the used csr and the inductance of the probe ground lead.

Regards Itsu

[magpwr]

Thanks guys for your comments.

Video is now available

Concerning the resonance of the both coils, this is suppose to be a Mazilli circuit which adjust its frequency according to the load.
We see that this unloaded circuit resonantes on 40Khz and it adjust itselve to 36Khz when the secondary coil is inserted.

So the primary loaded circuit (mazilli) now resonates around 36Khz and then i adjust the secondary coil with its caps (adding/removing) for max. voltage/brightness
of the bulb which means max. energy transfer (matching) and resonance.

I can not adjust the primary mazilli resonance frequency independently from the secondary coil (if so, please tell me).

Concerning the spikes and the positive sine wave like signal of the current, well i think thats more due to the involved inductances of the bulbs filament,
the used csr and the inductance of the probe ground lead.

Regards Itsu

hi itsu,

It's to hard to tell if there is any erroneous measurement related to reading taken base on the original Russian uploaded video which reveal 113khz at one of the gate in the primary and 40KHZ under no load/capacitor connected at secondary.


I did spot the multimeter as used in the Russian video with built in L/C and frequency measurement- "VICTOR VC9808" sold in ebay for around USD60 and comes with free shipment.
Base on the spec the max frequency it can handle is 10mhz.

My test in multisim revealed using mosfet at 24volts with 2 x100 ohms for pull-up resistor as spotted in Russian video did not run as close to the L/C frequency as compared to using IGBT's.
My  theory the higher "gate capacitance" as found in mosfet datasheet would likely degrade the free running oscillation base on L/C resonance under no load condition seems to be accurate.
The lower the "gate capacitance" on certain IGBT's the closer it gets to the L/C frequency as per online formula.This seems to be true especially so for Mazilli based circuit.


I do believe you might have a signal generator to determine the exact L/C resonance of the primary it suppose to run .
By setting signal generator to sine-wave and connect a 1kohms resistor at sig output to the primary coil/capacitor combination it would provide the correct reading on the oscilloscope.By adjusting frequency of signal generator to obtain maximum voltage ppk reading in oscilloscope would reveal to you the frequency it suppose to run as compared to the mosfet based mazilli circuit.

The 2 Wire-wound resistor you have used as pull up in mazilli circuit in your video isn't suited for high frequency and it does have inductance which degrade circuit to certain extend.I believe this is also where the unwanted spikes are coming from.