Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

Okay, I was thinking you only had the output of the power supply connected to a load.  Gotcha.

I might need to see a video to be sure, but I'm guessing your power supply is actually trying to charge the battery, which would put even more load on it.

Sounds like the diode you have in-place protects the power supply from being back-feed by the battery, but once the power supply's voltage goes above the battery voltage, then the current flow would reverse and that diode no longer helps.

So if I have things straight in my mind, yes you would need two diodes--one between the battery and the PWM; then another between the power supply and PWM.

That sound right to you?


M@

I could not find a suitable load for the 24V PS, so i looped it to the battery.

I agree with your comments, i will try putting in a diode also between battery and the circuit.

Itsu

[itsu]

There are two reasons why to keep PS looped back into input - the tuning involves it as part of circuit and it also will compensate power required for series resonance. The power draw from the battery is your losses and that what I was asking about - how much? Also when you have it looped the lighting of the bulb also has interest on how much power it take in that condition.

Also I was working in background with Oleg's DC-DC step-up converter and Tesla driver circuits. There are possibly intentional errors in original schematics and after fixing them all I hooked up small Tesla coil. It worked but the IRFP460 mosfet is no good for driving Tesla transformer primary at 1MHz+ range. The gate-source junction consumes about 100mA there which show inefficiency of that MOSFET. That also cause almost short circuit when hooked up with DC-DC converter. Will try other MOSFETs to find best one.

The DC-DC converter transformer details which was missing in Olegs schematics: I made 24+24T primary on small transformer with 1mm diameter magnet wire and the secondary was around 0.25mm for target voltage of about 130V. It gets up to 145V DC in in open end and drops to 87V with 15W 220V microwave bulb.

Cheers!

T,

the current draw from the battery at resonance is about 5A (@24V), and drops about 1A (while dimming the 40W bulb) during this slow cycling.

Thanks for the info on the Oleg circuit,  if possible could you add it to a drawing?   Thanks.

Itsu

[T-1000]

T,

the current draw from the battery at resonance is about 5A (@24V), and drops about 1A (while dimming the 40W bulb) during this slow cycling.

Thanks for the info on the Oleg circuit,  if possible could you add it to a drawing?   Thanks.

Itsu

Is is still taking 5A with PS looped when you have same voltage from battery over diode and looped PS?
For Oleg circuits - will share modified version after the whole system will be functioning in proper mode.

[Jeg]

That's medium easy for me to draw

It would be great if you had some time to discuss it.

From this web site (http://www.sm0vpo.com) i borrowed the basic blocks behind a pll. It works as to keep a constant frequency at the output. In this case 1KHz. But what we need of our pll is to change this frequency every time according to any change that happens inside inductor's line. What is your opinion about that? Where do we have ti inter-vain? Any block diag. would be very helpful.

[verpies]

But what we need of our pll is to change this frequency every time according to any change that happens inside inductor's line. What is your opinion about that? Where do we have ti inter-vain? Any block diag. would be very helpful.

I've done that long time ago.  The resonance in the series LC circuit is tracked by comparing the phase of the voltage and current in this circuit.

If you ask on this forum, there is a user who has done a video that shows what happens to a phase of voltage vs. current in a series LC circuit as the external driving frequency is varied. 
The phase relationship is more revealing than amplitude vs. frequency.