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Author Topic: Akula0083 30 Watt Self Running Generator.  (Read 679988 times)

Offline mscoffman

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #30 on: March 07, 2014, 11:23:35 PM »

Operating Temperature range minimum at end of data sheet.
C  -      0 degree C
I   -   -40 degree C

---

Digikey has these. I tend to think these are fairly old design.

Use TI:
http://www.digikey.com/product-search/en?vendor=0&keywords=TL494IN

---

On the circuit I think LED array is the free electron receiver antenna.
You need to try to have exact components for everything of the schematic to the right of toroid L1
inductor.  This toroid separates RF environment of the control on left from power RF on the right.
What I would do is inject some small fake free electrons from a separate power supply on small
capacitors to the upper and lower part of the led array in controlled phase to the driving signal on
the FET for a tune-up. The TL494 is designed to slow down the rep-rate of an overunity circuit
rather than let energy build up in capacitors. The FET will not function well until TL494 comes
on power. The led diode near regulator signals HV I don't know by going on or off? The FET
will then function efficiently.

:S:MarkSCoffman



Free Energy | searching for free energy and discussing free energy

Re: Akula0083 30 Watt Self Running Generator.
« Reply #30 on: March 07, 2014, 11:23:35 PM »

Offline Grumage

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #31 on: March 07, 2014, 11:40:24 PM »
Dear TinselKoala.

Welcome.  :)

Many thanks for the info on the driver.

Are you going to have a bash at this replication ??

I could think of no one more qualified.  :)

Cheers Grum.


Offline TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #32 on: March 07, 2014, 11:44:08 PM »
Quote
The TL494 is designed to slow down the rep-rate of an overunity circuit

Funny, I missed that in the data sheet. Guess I had better re-read it. I can certainly see why they want the "IN" version.... in Russia! But in Texas we don't see too much below-freezing weather. The hot end is more important to us, so we might need to use IN versions too!

DigiKey sells them for 73 cents apiece, either CN or IN versions, and you have to pay some shipping. Usually takes 3 days for a DigiKey order to arrive at my house.

http://www.digikey.com/product-search/en?v=296&pv16=6512&k=tl494&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25

So even though they are a few pennies more expensive each from thaishine, he pays the shipping, but with DigiKey you pay the shipping.

Offline TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #33 on: March 07, 2014, 11:50:41 PM »
Dear TinselKoala.

Welcome.  :)

Many thanks for the info on the driver.

Are you going to have a bash at this replication ??

I could think of no one more qualified.  :)

Cheers Grum.

Thanks, but no, I'm not going to be doing it, for a couple of reasons. (This could change, though.) However I can tell you that the basic oscillator section is virtually identical to just about every 494-based SSTC that I've seen including my TK2. There is a very easy way to make it "self-triggering" so that it seeks the resonant frequency of whatever it is driving, and maybe the Akula circuit above already does that. But I have no idea what is happening in the Akula circuit past the oscillator section. I'm pretty sure it will light the LEDs as long as it is getting power, but after you open the switch... I think it will go dark.

But when someone does build it, I'd love to see the results. I think that there are some "red herrings" in the design that don't really matter, but that's an experimental issue and I hope someone does the right experiments to find out.

ETA: Heh... checking my secret post-Apocalypse stash, I find that I have 2 ea. TL494CN chips and a handful of IRF3205 mosfets on hand. That's helpful indeed.


Offline TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #34 on: March 08, 2014, 12:32:48 AM »
Quote
The led diode near regulator signals HV I don't know by going on or off? The FET
will then function efficiently.

Hmm. The 7812 regulator supplies the chip's main power at pin 12, and it also supplies the collector current for the VT2 NPN transistor that is used to drive the 3205 mosfet (wrong symbol there btw)  in the low-side switch arrangement switching L1. The LED near the 494 is in the circuit to both of the emitters (9 and 10)  of the open-collector NPN output stages of the 494. So the LED will come on when the 494 is operating. The primary output of the 494 is through pin 11, to the gate of the VT2 transistor, where it works by grounding and ungrounding  the collector-base part through the 494 (pins 10 and 11 are the collector and emitter of one of the 494's output NPN transistors.) Pin 8, the collector of the other stage's output NPN, is apparently not used.

I think.  See the Functional Block Diagram in the 494 datasheet.

Free Energy | searching for free energy and discussing free energy

Re: Akula0083 30 Watt Self Running Generator.
« Reply #34 on: March 08, 2014, 12:32:48 AM »
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Offline TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #35 on: March 08, 2014, 12:43:32 AM »
Once the 494 is oscillating and driving the mosfet, there will be spikes generated whenever the L1 coil is turned on and off. The two MBR3545 diodes charge up the capacitor C3 and the second one helps keep the charge on C11 (I think). The LEDs and the inductors, the mosfet and capacitors C3 and C11 then keep the LED bank on while the circuit is operating with "start" button depressed, and after the "start" button is released they can keep the LEDs lit for a while, I think. The output LED side of the circuit, including the inductors, looks quite a lot like a JT with a wireless receiver (essentially the second MBR diode) attached.

I think. Maybe.

Offline TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #36 on: March 08, 2014, 12:46:38 AM »
Dammit. I actually have all components necessary to build the silly thing on hand, except my 494s are the CN type. Now see what you have done? I don't have room for all this (possible)  HV stuff in my lab!!

Well, almost. The high current Schottky diodes.... why are these needed? There certainly aren't going to be sustained currents of the magnitude that those can handle. 35 Amps!  Why would a 45 v, 3 amp Schottky not work?

Free Energy | searching for free energy and discussing free energy

Re: Akula0083 30 Watt Self Running Generator.
« Reply #36 on: March 08, 2014, 12:46:38 AM »
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Offline TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #37 on: March 08, 2014, 01:03:02 AM »
Ah. I see that GL's excellent PCB board uses the smaller 15SQ45 diode, a 15 amp unit. Some other component subs also. The "fact" that the 3205 mosfet needs a large heatsink is telling you something significant: It is dealing with HV spikes that are avalanching it continuously, and/or it is being underdriven or too fast for its rating. This mosfet has a very low intrinsic Rdss and runs cool in every application I have used it for.

Offline elementSix

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #38 on: March 08, 2014, 01:16:50 AM »
  :-X

Offline elementSix

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #39 on: March 08, 2014, 01:20:43 AM »
I would Like to point out that we must be very careful about the version of this Circuit that we work from.  I believe that the one I posted earlier is the original.  The one that is on the first page is XNAME41's altered version which he says is the one he used to do his replication.  Which is likely that Akula changed one little part to make us work for it, instead of getting a hand out.  But the ones I have posted below are both in very poor quality, which means that they have been changed and altered to make them hard to read and also they changed most values on resistors and capacitors so that we could not replicate this setup.  It could be a precaution in case it is a real working circuit or that they know for a fact that it works.  Anyways I have 5 different versions on my cpu.  I am posting the 2 I believe are total fakes, just because of their quality and the windings on the L1 are wound the same direction, unlike the picture that Akula put on them.  Which shows the Cw and CCW windings.  Its hard to read them, but you can see that they are totally different.  So we should probably work from Grumages, post/ XNAME41's version or the one I posted earlier with the questions.  I think that is the original.  So check the Russian page to see which one Akula posted.

Good Luck to us all.

Free Energy | searching for free energy and discussing free energy

Re: Akula0083 30 Watt Self Running Generator.
« Reply #39 on: March 08, 2014, 01:20:43 AM »
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Offline TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #40 on: March 08, 2014, 02:55:42 AM »
thanks, e6, that is helpful

I see the two strings of 5 each LEDs under the words "HL 15V" , and if they are 3V LEDs then yes, 15 volts will be needed to light them. But at only 60 mA or so, I think, and that is DC. If the thing does what I think, which is to make higher voltage, short durations spikes, then the current could be higher, but again, short term.

So where does the "30 Watt" output figure come from? DC power to light up all the LEDS to full brilliance and maybe beyond,  should be less than one watt. Are they special LEDs, high-power high brightness ones?

Offline TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #41 on: March 08, 2014, 03:07:20 AM »
Look. When the 12 V battery is connected and the "start" switch is depressed, the the C11 cap is charged right away and the C3 capacitor is also fully charged through the current path thru the unlabelled diode near the switch, the first "L1" coil which must be the toroid, the 0R22 resistor R1, the other "L1" coil which is the transformer primary, and the first high-current Schottky. This is the reason that diode must be able to handle high surge currents. This same path also includes the second Schottky, the secondary of the transformer, and back through the NC "stop" switch to help charge the other large cap C11. This same path also includes the output LED bank in parallel with it, so the LEDs light up too if the supply battery voltage is high enough. It must be over 12 volts anyway or the 7812 regulator does nothing, it can't regulate "up", just down. None of this current path involves the 494 chip or the 7812 VR at all, and the two charged caps will keep the LEDs lit for a little while (I don't know how long yet) after the Start switch is released and before the Stop switch is pressed.
I think.


Offline TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #42 on: March 08, 2014, 03:30:33 AM »
When the 494 starts oscillating this will affect the DC current path outlined above and the transformer will now start making spikes of higher voltage. This will charge up both big caps through their Schottkys, but the LED bank will keep the voltage from going too high on the caps, I think. If the 494 keeps running it is running on these two capacitors but I can't see how it would keep running for long, once the "start" button is released.

Dave45

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #43 on: March 08, 2014, 03:53:29 AM »
L1 is pulsed by VT1, the bemf from L1 runs through D1 and D2 into L2

Basically the same thing that happens in V8carlos's circuits, one coil gets a neg pulse the other a pos pulse.


Offline TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #44 on: March 08, 2014, 07:36:27 AM »
There are some rather large differences between that schematic and earlier ones in the thread. But at least it uses a correct symbol for the mosfet.

The LED is wired differently, the output of the 494 is done differently and the mosfet gate driver is completely different. The gate driver shown in this circuit is probably better than the ones in the other diagram. I don't know about the different connections to the 494.

However the DC current paths I described that charge up the two large capacitors are still as I described them.

As long as you cannot agree on which circuit diagram is actually to be used, there isn't any point in me building anything, I'll just go back to lurking. Where are the big diodes in the photographs that are below the schematics, for instance?

Free Energy | searching for free energy and discussing free energy

Re: Akula0083 30 Watt Self Running Generator.
« Reply #44 on: March 08, 2014, 07:36:27 AM »

 

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