A few newbie questions.

[John_Koorn]

Konstantin,

That battery is a Sealed Lead Acid. It will work, but you are better off getting a Flooded Lead Acid battery. It will give better results and last a lot longer.

The battery you want to get is a 13Ah Lawn & Garden Tractor battery or a motorcycle battery.

John K.

[kingstingtin]

you are better off getting a Flooded Lead Acid battery.

John, do you recommend me to use such batteries as a secondary battery?
I wanted to use Sealed Lead Acid only to power the device. Or is it better to use Flooded Lead Acid Battery for that?
By the way, I noticed that the battery no longer boiling during charging.

[John_Koorn]

Konstantin,

you are better off using flooded lead acid batteries for both primary and charge batteries.

John K.

[kingstingtin]

Thanks for the tip, John. Then I'll sought precisely Flooded Lead Acid Battery. Capacity in 13Ah be optimal for my device? I have only one power winding on the coil.

[John_Koorn]

Konstantin, for just one power winding I would suggest a 3Ah flooded lead acid motorcycle battery. 13Ah will take a long time otherwise and the machine will not be powerful enough to charge it completely.

John K.

[ZPDM]

Konstantin,

It sounds like you are making good progress now so I am a bit late, I also have much less experience than the people helping you already, however, I'll just sort of give an overview of how I made some modest progress in this area.

I came into this as a complete outsider and not wanting to try the whole machine at once the first circuit I built was a "magnetic pendulum clock" from the hobby magazine Nuts and Volts Nuts and Volts - September 2009. In this circuit you are pulsing a magnet swinging on a pendulum in the same way as the Bedini pulse motor. BTW it is also known as the Fedchenko clock after its inventor (Fedchenko, F. M. “Astronomicheskie chasy s elektromagnitnym vozbuzhdeniem kolebanii maiatnika.” In Issledovaniia v oblasti izmerenii vremeni. Moscow, 1962). So in the hobby magazine circuit you just have half the Bedini machine and on a pendulum not a rotor. There are a couple cool differences in the hobby magazine circuit if you look at it though, 1) the coil is not bifilar, there is no pickup/sensing coil, one just senses the induced voltage in the single winding and uses this to pulse the circuit. 2) there are two transistors set-up in what I now know is called a Darlington pair configuration. This added sensitivity is what probably allows you to get away with only a single wire coil.

Once I got this circuit working I ordered Rick Fredreicks/Bedini three pole kit so as to have proper components and some instructions. After I got that to work I built one more with a wooden rotor and skateboard wheel bearing. However, after this rather than try and optimize everything I decided to try and focus on looking instead at just the pulsing radiant spike part of the machine. So I began pulsing coils, first with a pulse generator, later a 555 timer chip, and later Joule Thief and related circuits. The Joule Thief is a very simple circuit. Make a Joule thief. . If you have a ferrite torroid core handy you could probably throw it together in half an hour. Then as with the Bedini machine you capture the radiant spike and use it to light an LED or with a bridge rectifier across both ends of the coil or Avramenko plug off one end of the coil, charge a battery, just like with a Bedini machine. There are many variables and complexities involved with even the Simplified School Girl circuit and things also do not always seem to behave the way, from my limited knowledge, textbooks say they would. I would just point out you can also break the problem up into two parts, the magnetic pulse motor (magnetic pendulum/Fedchenko clock) part and the capturing the radiant spike (joule thief, 555 driver circuit etc) part. I'm still enjoying looking at and experimenting with the joule thief and related circuits and I think the experience gained will be of some use if I ever go back and try and build a bigger, better, third Bedini SSG machine.

Paul

[kingstingtin]

John, let me a little pester you.

Konstantin, for just one power winding I would suggest a 3Ah flooded lead acid motorcycle battery.

Okay, at a capacity of secondary battery I have no questions.
But would not 3Ah capacity is too small to power the device? Because dial-type ammeter shows current consumption 320mA and digital "Fluke 15B" around 380mA. Probably for this current is more suitable capacity of about 7Ah? Or am I wrong again, because measuring devices show incorrect readings? Correct me please.

[kingstingtin]

Thank you Paul for your information. But I want to first understand with SSG, to achieve positive and sustainable results, and only then to try change something.

[John_Koorn]

John, let me a little pester you.

Okay, at a capacity of secondary battery I have no questions.
But would not 3Ah capacity is too small to power the device? Because dial-type ammeter shows current consumption 320mA and digital "Fluke 15B" around 380mA. Probably for this current is more suitable capacity of about 7Ah? Or am I wrong again, because measuring devices show incorrect readings? Correct me please.

Hi Konstantin,

Sorry, I should have made clear that the 3Ah should be the charge battery. If the machine is drawing 320-380mA (which seems very high for a bifilar SG) you need a primary battery of about 7Ah like you said.

John K.

[kingstingtin]

Hi John.
Today I purchased one battery 3Ah, it was the only one in our city. Now I filled it with electrolyte and he is waiting for their turn.
Please tell me how to be approximately the ratio I(in) / I(out)? Maybe I need another to experiment with the gap between the core and the coil? Now it is about 3-4mm. I just really do not know what I'm doing wrong.

[kingstingtin]

Picked up a new resistance to the load. 100 ohms (5W) + 475 ohms (1W).

One more question: do I need for the first time charge the new battery, using a conventional battery charger?

[BEDINSSGUKRAINE]

John_Koorn,
So the best result of charging when you have charging battery with small capacity (3-4 Ah) and primary battery(7 Ah) with large capacity?

[John_Koorn]

Hi John.
Today I purchased one battery 3Ah, it was the only one in our city. [ATTACH=CONFIG]1470[/ATTACH] Now I filled it with electrolyte and he is waiting for their turn. [ATTACH=CONFIG]1471[/ATTACH]
Please tell me how to be approximately the ratio I(in) / I(out)? Maybe I need another to experiment with the gap between the core and the coil? Now it is about 3-4mm. I just really do not know what I'm doing wrong.

Hi Konstantin, I'm not sure what you mean by "ratio I(in) / I(out)". Can you please explain?

Yes, you will need to experiment with the gap between the coil and the rotor magnet. What I do is tune the machine to fastest RPM for lowest current draw and then adjust the gap up or down a little to see if the rotor speeds up. 3-4mm sounds a little too close. Start at about 6mm and go up or down from there.

John K.

[John_Koorn]

Picked up a new resistance to the load. 100 ohms (5W) + 475 ohms (1W). [ATTACH=CONFIG]1476[/ATTACH]

One more question: do I need for the first time charge the new battery, using a conventional battery charger?

Hi Konstantin, yes you will need to charge the battery first. It does not have to be a conventional charger the Bedini SG will do. Depending on how long the battery was sitting at the store you may find that it will need a few cycles to get to full capacity.

John K.

[John_Koorn]

John_Koorn,
So the best result of charging when you have charging battery with small capacity (3-4 Ah) and primary battery(7 Ah) with large capacity?

Hi BEDINISSGUKRAINE,

No, what I am saying is that the primary battery needs to run at the C20 rate of discharge. I think Konstantin's draw current is too high. Normally a bifilar SG with the recommended coil will run at around 150mA draw current. So a 3Ah battery would normally be OK.

John K.