Kapanadze Cousin - DALLY FREE ENERGY

[Jeg]

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]

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.
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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]

  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.

[conico]

  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%.

[NickZ]

    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...