Kapanadze Cousin - DALLY FREE ENERGY

[Hoppy]

Hopefully our Russian friends can guide us on how we heat-up the toroid TR1 using Dally's circuit. 

Regards
Hoppy

[verpies]

Hopefully our Russian friends can guide us on how we heat-up the toroid TR1 using Dally's circuit. 

Yup, that's why I prefer transformerless DSRD drivers.

[T-1000]

Hopefully our Russian friends can guide us on how we heat-up the toroid TR1 using Dally's circuit. 

Regards
Hoppy

That might happen only in three cases - heating wires, Eddy currents in core or resonance on magnetostriction..

[verpies]

That might happen only in three cases - heating wires, Eddy currents in core or resonance on magnetostriction..

Eddy currents are proportional to the average current flowing in the primary and that current is very low because of the <1% duty cycle.
Also eddy currents require conductive core and ferrite in not very conductive.
The conclusion is that resistive heating of the winding or heating the core via Eddy currents will not accomplish that amount of heating as is claimed.

Please write some more about the Magnetostriction resonance. First of all, is it a mechanical resonance caused my the mechanical vibration of the core that is expanding and contracting under magnetostriction?

Also, what do you think about the Hysteresis Losses of the ferrite core, as a source of heating?

[itsu]

So I must ask to repeat these measurements with the scope probe set to 1:10 attenuation, and with the signal generator leads as short as possible (soldered directly to the parallel LC circuit via a kΩ resistor in series) and the DUT not connected to anything else.

Toroid resonance measurements redone with direct connected FG via 2.2KOhm and a 4.7 (5)nF and 10nF cap (probe set to 1:10 as it is always with me):

12t   10nF 1720Khz
12t  4.7nF 2430Khz
6t   10nF 2510Khz
6t  4.7nF 3620Khz   

which is almost identical wrt yesterdays measurements using an inductively coupled FG.

Video here:  http://www.youtube.com/watch?v=uFLM7Mj9m8k&feature=youtu.be

Regards Itsu