Author Topic: New DC resonant charging circuit  (Read 12314 times)

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New DC resonant charging circuit
« on: April 05, 2010, 13:17:41 pm »
Hi,

Here is a working DC resonant charging circuit.
The voltage across the Waterfuelcell is al least twice of the input voltage.
In my case almost 30Vpp against a 10v input.

You might pull the conclusion that the waterfuelcell acts like a small battery or capacitor.

Tune the circuit till you reach the highest voltage across the waterfuelcell.
USE ONLY TABWATER OR DESTILLED. NO CHEMICALS ALLOWED IN HERE.

Type of diode: Not important. Only heavy enough for the amps you use
Type of coil: in my case 25 winding of 1mm wire on a metal lamel core. 1mH
                    Just play with some cores you have.
Type of FET: Not important. Any N type will do. The lower the internal resistance the better. Your choice depends on voltage and amps.
Frequency: try to stay above 1khz with tuning. My test was done around 10khz.

Steve


http://www.tpub.com/content/armymunitions/mm50058/mm500580088.htm

http://www.richieburnett.co.uk/dcreschg.html#resonant

http://teslahv.com/DC%20Resonant.htm





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Re: New DC resonant charging circuit
« Reply #1 on: April 06, 2010, 21:54:02 pm »
how would you integrate the step-up transformer into this circuit?
the only way i can think of is using a hv-mosfet. not the best idea

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Re: New DC resonant charging circuit
« Reply #2 on: April 07, 2010, 08:48:38 am »
how would you integrate the step-up transformer into this circuit?
the only way i can think of is using a hv-mosfet. not the best idea

Tesla used for this a rotary switch.
Like the distributor from a cars ignition system.

Stan solved that somehow with pulsing the stepup trafo..




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Re: New DC resonant charging circuit
« Reply #3 on: April 07, 2010, 16:32:34 pm »
That is the conclusion I recently reached regarding Stan's circuit.  His inspiration was Tesla's method of conversion of high potential and frequency and Stan modified it slightly so the path was unidirectional.  Before the rotary switch there was the spark gap and then Tesla would quench the spark magnetically or by air or otherwise.  Stan uses the 555 and divide by 8 or 10 counters to simulate the rotary switch in solid state.  IF there's communication between the wfc and the vic then it's the pickup coil that's the "antenna" for feedback to the front end.  I don't see much difference between what Stan was doing and what Tesla was studying and publishing and patenting.  The difference is where Stan publishes the location of some components like the scr.  The front end should get a nice sine wave and the back end should switch on and off very fast.  If I want 50% duty cycle I would use ac like a center tap transformer, a half wave bridge and 2 or a multiple of 2 tubes or tube arrays.  For 3 phase a multiple of 3 tubes.  It's as simple or as complicated as one wants to make it.

Andy

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Re: New DC resonant charging circuit
« Reply #4 on: April 07, 2010, 19:49:37 pm »
But back to the circuit,
why does it work fine in this configuration (switch/mosfet parallel with cap) - i can get 70V at the capacitor from 30V at 0,1A - but why doesn't it work in the stanley meyer / richie burnett / tesla coil version at all? (same voltage but only 2V at the cap).

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Re: New DC resonant charging circuit
« Reply #5 on: April 08, 2010, 18:57:44 pm »
btw you can get voltage to your water cell which is not insulated with this method!! Strangely enough i had to change the direction of the bifilar connections yet again.
unfortunately the amp draw in general is too big so i cannot test further yet. i'm also thinking of rectifying my 230V grid current which would give me about 350V DC i believe. I have a switching Mosfet for 600V so it would work. But the current is way too big at the moment.

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Re: New DC resonant charging circuit
« Reply #6 on: April 08, 2010, 21:24:49 pm »
add a series resistor some where? might need a big one though

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Re: New DC resonant charging circuit
« Reply #7 on: April 08, 2010, 22:51:06 pm »
but it will eat up the voltage, even a 20Ohm. I don't know why the coil uses so much current even when pulsed at 50kHz. I think i have a short in the circuit somewhere or something like that.