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Author Topic: Kapanadze Cousin - DALLY FREE ENERGY  (Read 11718745 times)

verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12000 on: February 06, 2016, 09:04:06 AM »
Yes, but I didn't notice any effect, just the strong current vibrating the core (NMR, oh no!),
That's just magnetostriction or the slapping of two yoke halves and it does not have to be a bad thing.

Can the 18v Zener be replaced by a certain value capacitor, or another type of diode, instead.
Perhaps by a string of lower voltage Zeners or a low voltage TVS diode.

Hoppy

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12001 on: February 06, 2016, 11:34:51 AM »
  Yes, but I didn't notice any effect, just the strong current vibrating the core (NMR, oh no!), was just probably caused by a short circuit just before the circuit died.
  Can the 18v zener be replaced by a certain value capacitor, or another type of diode, instead. As I'm out of those zeners, for now.
 I think that the fets may be ok.
  Or, maybe I can run the system on my 12v battery, like I did previously, using just the 12v zeners on the Mazilli, until I can order some more parts.
  I'd like to look into the effect that I showed on one of my videos, when lighting the 25w and 50w bulbs, just off of the Kacher circuit output, while running from a 12v, 2.5A wall adapter.

Nick,

You would need to replace the zeners with zeners, or alternatively switch back to your 12V battery driven setup. If your mosfets are short circuit, you can confirm this using your meter.

Hoppy

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12002 on: February 06, 2016, 12:21:13 PM »
Was it at 30V? Did it suppress High voltage successfully? Sometimes HV strikes me when i touch my metal pots for altering frequency and duty cycle. Even they are grounded!!! So i ordered some tvs at 30V@ 600W

Hi Jeg,

I used a 30V TVS to provide protection for my PSU, so that there was a good margin above the nominal 24V supply voltage. When subjected to a series of high voltage transients, the pulse currents can quite easily destroy even a 600W rated TVS, so a low value power resistor can be used in series with the TVS to limit the pulse current to a safe level, whilst clamping the peak transient voltage to a level that is within the max rating of the components being protected. If the TVS diode(s) are protecting transistors or mosfets then the TVS clamping voltage needs to be chosen at a good margin under the safe maximum voltage rating of the component(s) being protected.

Jeg

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12003 on: February 06, 2016, 12:28:54 PM »
Hi Jeg,

I used a 30V TVS to provide protection for my PSU, so that there was a good margin above the nominal 24V supply voltage. When subjected to a series of high voltage transients, the pulse currents can quite easily destroy even a 600W rated TVS, so a low value power resistor can be used in series with the TVS to limit the pulse current to a safe level, whilst clamping the peak transient voltage to a level that is within the max rating of the components being protected. If the TVS diode(s) are protecting transistors or mosfets then the TVS clamping voltage needs to be chosen at a good margin under the safe maximum voltage rating of the component(s) being protected.

Thanks Hoppy. I hope this will solve my problems permanently. Do you have any suggestion on what value resistance to begin with?

Hoppy

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12004 on: February 06, 2016, 12:44:03 PM »
Thanks Hoppy. I hope this will solve my problems permanently. Do you have any suggestion on what value resistance to begin with?

Jeg,

This is best practically done by using a few hundred ohms and then monitoring the temperature of both the TVS and resistor to ensure that it stays well within their ratings. However, the resistor may not be needed, so first just monitor the temperature of the TVS without a series resistor.

Jeg

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12005 on: February 06, 2016, 12:49:07 PM »
Jeg,

This is best practically done by using a few hundred ohms and then monitoring the temperature of both the TVS and resistor to ensure that it stays well within their ratings. However, the resistor may not be needed, so first just monitor the temperature of the TVS without a series resistor.

Copy it!! ;)

magpwr

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12006 on: February 07, 2016, 03:08:02 PM »
hi everyone,

I have finally uploaded my prototype circuit "UC3825 PWM 1.5Amps output" which was tested to work up to 350VDC.This is the smallest PWM circuit i have made on Veroboard (dots). Length=11.5cm

www.youtube.com/watch?v=AKLRqOK5p8w

Do take note for high voltage i am merely using 8% duty to achieve 1.5kVpp at the 28turns as shown in video.HV Safety reason.
PWM Circuit is created with soft start C7 10uf to give around 3second delay after power on.This is to prevent sudden rush of current upon power on.

This UC3825 circuit is able to replace the TL494 and the supporting mosfet driver in one go.Hence it lower the cost of PWM circuit.


Varistor was not implemented since i am using 1.2kv SIC mosfet Rds on 88mOhms.
I'm still waiting for 870volts ZOV varistor to arrive from China.

If you are using 600volts Mosfet please do use around 470volts varistor.Take note varistor does have small capacitance.For me the lower the capacitance for varistor the better.

I am using around 24volts gate signal for Silicon Carbide Cree Mosfet.Please take for igbt's it is normally around 15volts to 20volts for the gates.But typically it's around 18volts.

This PWM Circuit is also able to operate from 1xLi-ion 18650 battery(via XL6009 voltage boost circuit) merely to switch Mosfet as alternative means to isolate from the supply or high voltage supply.
-----------------------------------------------------
Next stage to test actual sergey interrupter circuit on breadboard which i have previously modified and uploaded in this topic.

That's all for now.

conico

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12007 on: February 07, 2016, 03:18:15 PM »
  I notice that when I connect my 100x scope probes to the 168t output coil, it can kill the effect that the Kacher has on it, so I leave the black probe off, disconnected. It's not as accurate a reading that way, but it doesn't kill the effect.

You must have a load about 100w -500w depends of your device, then make resonance for it.
 Don't make resonance without load.
« Last Edit: February 07, 2016, 06:23:26 PM by conico »

conico

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12008 on: February 07, 2016, 03:24:42 PM »
  Yes, but I didn't notice any effect, just the strong current vibrating the core (NMR, oh no!), was just probably caused by a short circuit just before the circuit died.
  Can the 18v zener be replaced by a certain value capacitor, or another type of diode, instead. As I'm out of those zeners, for now.
 I think that the fets may be ok.
  Or, maybe I can run the system on my 12v battery, like I did previously, using just the 12v zeners on the Mazilli, until I can order some more parts.
  I'd like to look into the effect that I showed on one of my videos, when lighting the 25w and 50w bulbs, just off of the Kacher circuit output, while running from a 12v, 2.5A wall adapter.

Be careful of your duty cycle, must be less then 40%.
« Last Edit: February 07, 2016, 06:21:23 PM by conico »

NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12009 on: February 07, 2016, 07:22:16 PM »
    Conico:
   I use three 100w bulbs as the load, and I don't have or use a duty cycle controller, as yet.
Nor have I had any problems running at 100% duty cycle. But, a duty cycle controller circuit does seam to be needed.
   I'm hoping that someone will show their driver circuits putting out some real use able power and lumins levels. And show the proper sync "effect" amplifying the output. Without burning up their delicate components from the HV spikes. Which up to now, has not been obtained by any of us, nor a self running device, either.  So, the search goes on...

Jeg

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12010 on: February 07, 2016, 07:33:28 PM »
Great tool for experiments magpwr. Thanks for sharing.  ;)

Ed morbus

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12011 on: February 07, 2016, 09:22:54 PM »
magpwr
Thanks for sharing

John.K1

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12012 on: February 07, 2016, 10:55:47 PM »
Sorry guys, I know it was here before,I just took the KA7500 out of my drawer.

Can somebody tell me what resistor and Capacitor I should to change to get different frequency than the defoult ( which is 33KHz).

Also, I am not sure if I understand right how to use it. Is this actually the device I can strait way connect to mu yoke ( I guess it is not - possibly not enough protected ?)or should I use it just with gate drivers and Power Mosets??

I checkesd it on scope  both PWM pins. One of the PWM square is slightly bigger than the other. In other words when PWM_1 goes off there is still some time delay before the PWM_2 goes ON. Is that normal?

Thank for your help. ;)


Void

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12013 on: February 08, 2016, 12:34:53 AM »
Sorry guys, I know it was here before,I just took the KA7500 out of my drawer.
Can somebody tell me what resistor and Capacitor I should to change to get different frequency than the defoult ( which is 33KHz).
Also, I am not sure if I understand right how to use it. Is this actually the device I can strait way connect to mu yoke ( I guess it is not - possibly not enough protected ?)or should I use it just with gate drivers and Power Mosets??

Hi John.k1. If you can identify pins 5 and 6 on the KA7500 chip, according to the KA7500 spec sheet,
the resistor connected to pin 6 and the capacitor connected to pin 5 are used to set the frequency.
See page 3 in the following KA7500 spec sheet:
https://www.fairchildsemi.com/datasheets/KA/KA7500C.pdf

Some info on your KA7500 board on ebay states the following regarding Rt and Ct possible values:
"Changing the timing components Ct, Rt parameters can be easily changed PWM output frequency.
R(t) ranges from 1.8~500kΩ, C(t) ranges 4700pF~10μF, the maximum oscillation frequency (fOSC) ≤ 300KHz."
http://www.ebay.com/itm/TL494-KA7500-DC-9V-25V-Driver-Board-DC-DC-Converter-Inverter-Boost-Module-PWM-/111850697617?hash=item1a0ad23391:g:FBIAAOSw3KFWcAMd
The spec sheet says it can be used to a max frequency of 200 kHz, but in the Description section they say 300 kHz. :)

I would guess that you would have to connect outputs PWM1 and PWM2 to MOSFET drivers and then
from there to some driver MOSFETS.

TinselKoala

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #12014 on: February 08, 2016, 01:04:49 AM »
The photo shows a TL494, does it not? I don't know how precisely equivalent the 494 is to the KA7500, but pins 5 and 6 control the timing just as Void has said.

The "dead time"  is controlled by an input to Pin 4 on both types.