Resonance Circuits and Resonance Systems

[Magluvin]

Hmm ok so difference to my mosfet circuit was that you have no resistors. Gotta check this out in the real world. Thx!

I wonder if you can do this with the coils resonant freq and if that gives you a boost?

Hey Belfior

Pick up a couple books on switching power suppllies or do some online search for these.  Some books I have taken it all the way to explain about 'staying away' from resonance freq of the transformers or inductors and try to be at least 10 times below the self resonant freq and stay off of harmonics there of also.  Well since your in the resonance topic, lets do just that and break the rules. 

Ill see what I can come up with to try some things.  Typically the self resonant freq of an inductor or power supply transformer is pretty high. So in your design, I would work it out to have some freq around 50khz or so.   If it were a 50khz power supply design then the transformer they would recommend would have a freq around 500khz.  But those supplies dont have hundreds of turns, if you have ever taken a switching supply transformer apart.  So the turns number needs to increase using smaller wire and do some bifilar windings to increase the capacitance, or add a cap to a winding.  Those kinds of things first to get a workable resonant freq going in the coil or transformer. Then work on a driver for it.

Mags

[Magluvin]

Look for switching or regulated power supply books by Irving Gottlieb

https://search.yahoo.com/search;_ylt=A0LEV1QdnPlZc_4AjotXNyoA;_ylu=X3oDMTEzaWQ3NWZvBGNvbG8DYmYxBHBvcwMxBHZ0aWQDQjQ0ODJfMQRzZWMDcmVs?p=irving+gottlieb&ei=UTF-8&fp=1&fr2=rs-top&fr=yfp-t

Mags

[TinselKoala]

Hmm ok so difference to my mosfet circuit was that you have no resistors. Gotta check this out in the real world. Thx!

I wonder if you can do this with the coils resonant freq and if that gives you a boost?

Also check your PMs. Replace the square wave generator with a 2 terminal type, connect up the second terminal to ground (negative rail) to avoid the floating gate problem and make the mosfet switch properly. Too big an inductor means too slow a spike. Note that the _current_ from the inductor continues to flow _in the same direction_ when the mosfet switches off, and the inductor's _voltage_ as shown on the scope shows the spike as _negative_ because the inductor effectively switches polarity (bottom terminal becomes positive) when mosfet switches off.

http://tinyurl.com/y9hzs47k

[Belfior]

Look for switching or regulated power supply books by Irving Gottlieb

https://search.yahoo.com/search;_ylt=A0LEV1QdnPlZc_4AjotXNyoA;_ylu=X3oDMTEzaWQ3NWZvBGNvbG8DYmYxBHBvcwMxBHZ0aWQDQjQ0ODJfMQRzZWMDcmVs?p=irving+gottlieb&ei=UTF-8&fp=1&fr2=rs-top&fr=yfp-t

Mags

Wanted this from Gottlieb "Practical Oscillator Handbook" but it is 100$! Maybe for xmass then...

now that I got the voltage pump circuit figured out I ill start blasting my 90V GDT to a coil. That means be basically have unlimited free energy available pretty soon!

Need to start buying aluminium hulls for my spaceship now that the power supply is almost finished...

[Belfior]

Too complicated and doesn't quite capture the concept.

Try this:

http://tinyurl.com/y7jgmrko

By the way... I can charge a cap to 15 times the supply voltage using only a relay and a diode. Figure this out and you'll catch the concept.

Ok first I thought this is just theory and will not even work. Don't know if my IRFP260Ns are just cheap copies. But the circuit did not work with it. Replaced it with 2N3055 and something started happening. Now I get my WIMA 0,047uF 2000V cap charged to 230V and it fires through a 90V GDT into a coil nicely. Great system and small in size to do all kinds of spark gap testing!