Bedini SG

[Sephiroth]

If I were to wind them seperately, I would wind the trigger winding first and then the power winding.

but, it's not really recommended unless you have to better just to wrap the coil as neatly as you can. Don't worry too much about it being perfect.

[tjnlsn255]

Ok cool....

Thank you Seph... I will try not to worry so much about how uniform and smooth the bifiler is but still do my best.....

Thanks for all the great info here.....

Todd

[DavidE]

Fan coil tuning.

I found a unique way to get a PC fan to resonate (without blades spinning).

Lay fan down, stack 1 or 2 neo magnet in the middle of the fan hub.
Turn on the power. Turn the fan blades until you hear an audible pitch.
Tune with your voltmeter...

[DavidE]

Animation

Sephiroth

Very nice animation. Great contribution!

Question: How do you explain self oscillation of coil with a fixed magnet field?

[Sephiroth]

Self Resonance

I haven't heard a full explaination for my mentors so can not be absolutely certain of what causes self resonance, but this is how I see it though my observations. Anyone please feel free to correct me (or tell me I'm right... either is good)!

.................................................. ........

Remember the coil works as a transformer.

As the coil is being energised current is being induced in the trigger winding in the opposite direction to the current in the primary coil. This forces current through the resistors and into the base of the transistor. But this only happens for as long as the coil is BEING energised. Once the magnetic field is stable (the coil is fully energised) it no longer induces voltage in the trigger coil and so the transistor turns off and the magnetic field collapses. Not only does this induce flyback voltage in the power winding (which we harvest and store in the charging battery) but it also induces flyback (to a lesser extent due to the resistors) in the trigger winding which is in the same polarity as the flyback voltage in the primary winding so the current flows through the 1N4001 diode and through the trigger's resistors. Normally that would be the end of it and there would be no resonance.

BUT...

If the resistance in the trigger circuit is set very high then it allows for some capacitance in the trigger circuit. Charge builds up on either side of the resistors, a postive charge on the side closest to the 1N4001 diode and a negative charge on the side closest to the top of the trigger coil. You can imagine the resitors behaving like the insulation between the plates of a capacitor.

Once the magnetic field has fully collapsed the charge that has built up has a choice... it can either force its way through the resistors to equal out their charges, OR the positive potential can flow through the base of the transistor and through the trigger winding. Normally resonances is induced when the resistance is very high, so the path through the base of the transistor and through the coils is much more appealing then going through the high resistance

and so that flow of charge turns the transistor on and the process starts all over again! Tadaa! Self resonance.

[DavidE]

???

Sephiroth

If the resistance in the trigger circuit is set very high then it allows for some capacitance in the trigger circuit.

So one way of doing this may be producing a disproportionate magnetic field to certain parts of the circuit? i.e. Neo magnets effect on the coil (or coils) causing oscillilation (resonance)? The resonance is simply the tuned path?
A little brother to Bearden's MEG?

Configuration (proximity/relative strength) of magnetic field/coil coupled with dipole antenna (battery) limits or expands access to potential?

Lower current flow greater magnetic field? Greater currents lessor magnetic field to produce the same effect?

Potential is only limited by tuning the welcome frequency, and the size/health of dipole system?

Are we looking for potential on the positive side or negative? Or is this determined by the work we wish to do?

[Sephiroth]

I don't think I ezplained it well enough

Perhaps this will help:

selfresonance.jpg

[tjnlsn255]

Update on my SSG .....

I wrapped a new larger bifiler coil with a solid core (no air gaps).

Now when I put the primary battery accross the power coil I get a good N to N repel between the coil and the magnets (rotor) that part seams good now....

But when I hook up the primary and charge batteries and turn it on still I just get a hum when I turn up the pot but no sustained spin... it seams like the N to N is always on.....

Also, when I measure the voltage across the 1N4001 diode that is connected accross the E and B of the transistor (2N3055) the most voltage that I ever get is .2 volts at the base of the transistor... that is not correct is it?

The silver band of the diode is next to the base of the transistor, that is correct, right?

When I spin the magnets (rotor) the voltage at the base of the transistor does change up and down but never more than .2 volts. This should be up around 5.0 volts for the transistor to turn on, right?

What should the voltage across the 1N4001 diode be when I spin the rotor?

I have replaced the transistor but I only have 1N914 diodes not any more 1N4001s .... will the 1N914 work or should I get more 1N4001s?

I think I am very close but still no spin ......

[kick-bak]

I used an IN4148 diode with my first circuit to get it going but I had to use a very low resistor to get it to spin up. I actually removed the resistor before the pot to get it to run the first few days till someone mentioned I ran the chance of blowing the transistor without the resistor off the base. I was using a 1k pot.
I'm now using the IN4004's off the base's
Hope that helps

PS: Did you try giving it a really hard spin to get it going ?

[DavidE]

Forum question?

A few days ago I resurrected a deep cycle marine battery from storage.

I tested the battery current and it read about 5.5v. But when I put any kind of load on it... in seconds it went to zero.

I inserted it in the charge side of the SG circuit along with another small 12v battery (in parallel) and it (both charging batteries) within a day... were up to 11.25v and would sustain and run a small dc motor. I have been in this charging test mode for about three days... and both batteries in the charge circuit continue to gain voltage.

Here is my confusion. When I started the primary battery (powering the resonant coil) started at 11.7v has risen to 12.3v while running the circuit. Shutting down the circuit, the voltage on the primary battery is 12.5v (steady).

I don't understand how it can charge the other two batteries and also gain voltage at the same time?






Note: I only tested the marine battery the first day with a small dc motor to confirm what the meter read (increased voltage), it did in fact turn the dc motor easily and only minimally lowered the voltage of that battery (a level of proof that the battery was gaining back it elasticity).

[theremart]

bring your deep cycle back.

If you do some looking around I think you will find if you conventional charge it normally takes a brand new battery 10- 20 cycles to get to full capacity.

But I have found it does seem to be like working a muscle, the more you work it the stronger it gets, but the less you use it the weaker it gets.

Mart

[Bodkins]

Hi Shamus,

I have tried the super pole and it worked fine but I never compared it to the standard configuration so don't know how much it benefits the circuit.

Unfortunatly I live 3 stories up in the sky so a ground rod is not possible however on my trifilar SSG I normally get a 36-48v spike on the primary coil before the flyback current kicks in. But when I hooked the negative side of the circuit to earth the spike is cut down by a third. Don't know if that means it inhibits the spike or whether it allows the circuit to make use of it.

Think about antenna Sephiroth tesla powered a car with One! sorry two!

[tjnlsn255]

Can someone point me to a post or give me a few SSG circuit voltage references when everything is hooked up and running just before you spin the rotor and after?

I have been measuring my voltages with the "Common" (black) lead of my voltmeter on the negative side of the Primary battery.....

Just a side question.... I thought that electrons (current) flowed from negative (extra electrons) to positive (less electrons), is that not correct? In the diagrams the red arrows are flowing positive to negative? I am really trying to understand this circuit but I am just not getting it.....please enlighten me......

Thanks for any and all help....

Todd

[Shamus]

To answer your side note:

There are several ways to look at it, and, like I said in my post, I've drawn the energy flows from positive to negative but everything still works if you draw them from negative to positive. Yes, conventional physics says that electrons flow from the (-) to the (+), but it doesn't really matter which way you think about it because the end result is the same.

As far as understanding it goes, the thing to keep in mind is that a transistor will only conduct current across the collector-emitter junction if and only if there is current flowing through the base-emitter junction and in the correct direction (against the arrows if you're thinking (-) to (+) flows, with the arrows if you're thinking (+) to (-) flows). That's the only thing I didn't really understand about the circuit, that and the idea that the high voltage spike comes from a fast transistor off transition.

Of course, I don't know what it is exactly that you're having trouble with, but if you could elaborate I'll do my best to explain.

[tjnlsn255]

Thank you Shamus,

Thank you for the flow explanation!

What I need is a set of voltage readings around the important areas of the circuit (transistor) before and after spinning the rotor.

I can not get my rotor to spin on its own...

What should the collector to base voltage differential be before and after sending the magnet pulses to the base of the transistor and where should I measure the amps to measure the collector current flow to prove the transistor is turning on.....

My primary battery is a 9 amphour battery at 12.9 volts.

I am using a 1n4001 diode across the base/emitter of the transistor and my transistor is a 2N3055.

What other data do I need to provide?

I do not have a scope yet.... I should get my scope back in about a week....

Thank you for the awsome support!

Todd