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Overunity Machines Forum



Understanding electricity in the TPU.

Started by wattsup, October 18, 2009, 12:28:42 PM

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0 Members and 9 Guests are viewing this topic.

gyulasun

Wattsup,  did you mean this schematic here from Groundloop?
http://www.overunity.com/index.php?topic=8185.msg240769#msg240769

and you use two NPN bipolar transistors instead of the two MOSFETs? If so, then some modification may be needed in the schematic perhaps?

Just for me to understand your description better, with the least puzzle, ok?
I am not fully in your picture I am afraid...

Gyula

wattsup

@gyulasun

Yes the basic circuit is the one you showed but with some changes. But this is not important for me right now since I want to explore more the effect it is giving, or not giving, even with more changes.

Also, I want to take some time and test the Tesla Ozone Patent by using 4 or more of these PN44116A's JFETs in parallel. This means I have to make a short circuit via a high impedance coil going to the negative but just do it with a very small voltage to start and I will report the results. Lucky I have 100 of these JFETs. lol

The most important thing for me is I now have a JFET that can open and close very fast and that does not have an internal diode.


gyulasun

Quote from: wattsup on May 31, 2010, 10:26:18 AM
...
Also, I want to take some time and test the Tesla Ozone Patent by using 4 or more of these PN44116A's JFETs in parallel. This means I have to make a short circuit via a high impedance coil going to the negative but just do it with a very small voltage to start and I will report the results. Lucky I have 100 of these JFETs. lol

The most important thing for me is I now have a JFET that can open and close very fast and that does not have an internal diode.

Thanks, ok.
However, you cannot make that short circuit with PN4416A jfets because they have typical ON resistance (at zero gate-source voltage) of about 1-2kOhm each. And if you parallel ,say, 5 of them, you would still have between 200-400 Ohm ON resistance between the drain-source electrodes, far from a short. I repeat this just for to be aware of. 
And as soon as the voltage difference between the drain-source exceeds about 35V (DC or peak to peak AC), the 5 jfets will probably be ruined.
So just be careful.

rgds, Gyula

forest

Something is weird with LC circuits. If I have properly constructed mechanical pendulum in action it can run many minutes,but LC circuit without power stops immediately. Looks like power source and mosfets are the case why this happens. I need to think how to use fets only to overcome resistance of circuit and use power source only to make initial push to the circuit.

gyulasun

Quote from: forest on May 31, 2010, 02:23:09 PM
Something is weird with LC circuits. If I have properly constructed mechanical pendulum in action it can run many minutes,but LC circuit without power stops immediately. Looks like power source and mosfets are the case why this happens. I need to think how to use fets only to overcome resistance of circuit and use power source only to make initial push to the circuit.

Yes,  Power source can "ruin" the resonant Q of an LC circuit because a decent power source (usually a battery or a mains power supply) has a very very low output impedance. MOSFETs (or bipolar transistors or jfets etc) used as a pure switch also can only add loss to  LC circuits.
Here is a Java applet for resonant LC circuits where you can adjust L, C and the series equivalent loss resistance of the parallel LC tank circuit:
http://www.walter-fendt.de/ph14e/osccirc.htm 

If you use the 500uF, 5H values and zero series resistor value (a loss-less LC circuit) you get undamped oscillations. If you introduce any small higher than zero loss resistor, then you get damped oscillations which eventually reduce to zero (input energy dissipates in the loss resistor such as like wire resistance, core loss if any and capacitor dielectric loss).

So if you use different value loss resistors, you can compare the 'ringing' time for the different loss values, and maybe compare them to the mechanical pendulum's running time.

If you want to use a MOSFET (or any other active device) to overcome the loss of the LC circuit, then you have to build it into a circuit which makes the active device to 'simulate'  ,say, a 'negative' resistor. 
This can be achieved by building an oscillator around the LC circuit from the active device or bias it like for instance Naudin shows here:
http://jlnlabs.online.fr/cnr/negosc.htm 
However, to do so involves using an energy source to maintain the oscillations, unfortunately. So this way of making and maintaining oscillations in LC circuits does not seem to be OU, unfortunately.
(The best oscillator shown in this Forum consumed 3-4uA current from a 3V battery at 5-10kHz frequency and used a MOSFET, it was built recently by Luc (gotoluc).
(I think there are possibilities in parametric circuits.)

rgds,  Gyula