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Author Topic: Akula0083 30 Watt Self Running Generator.  (Read 1269840 times)

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1020 on: April 30, 2014, 05:57:41 AM »
Hey All,

Fantastic Work from everyone!

Few minor things I have noticed so I thought I would have a go at some drawing! I am new in Eagle so go easy! But, I want to point out there are some circuit inconsistencies with the last few circuits that have been posted.

The closest circuit I have seen is below posted from 'havuhung ' The hand drawn schematic that may be one of Akula's or a well drawn copy of the original board.

I have used Eagle to Re-Draw this hand drawn Schematic. I am asking you guys to check the schematics and point out any errors.

Once proofed, I will post the Eagle Files.

All the Best

  Chris

TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1021 on: April 30, 2014, 06:02:32 AM »
By the way, I forgot to say that the schematic I posted is Groundloop's work, translating and interpreting and filling in blanks. Thanks, GL!
I got it from "OUR" friends.  ;)
There is a later version with Miller clamps on both mosfets, but MenofFather, I think, says the top one isn't needed.

havuhung

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1022 on: April 30, 2014, 07:33:38 AM »

havuhung

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1023 on: April 30, 2014, 08:36:53 AM »
Hey All,

Fantastic Work from everyone!

Few minor things I have noticed so I thought I would have a go at some drawing! I am new in Eagle so go easy! But, I want to point out there are some circuit inconsistencies with the last few circuits that have been posted.

The closest circuit I have seen is below posted from 'havuhung ' The hand drawn schematic that may be one of Akula's or a well drawn copy of the original board.

I have used Eagle to Re-Draw this hand drawn Schematic. I am asking you guys to check the schematics and point out any errors.

Once proofed, I will post the Eagle Files.

All the Best

  Chris
Hi EMJunkie,
The hand-drawn circuit diagrams may be the circuit board in Akula's No3 Video clips have all of two pairs of transistors and MOSFET (KT3710 and IRF3710) for two primary branches out tranformer winding flyback ferrite core.
Akula0083 circuit diagram of No3-Disassembly-Lantern. Potentiometer other values ​​instead 20Kohm - 10Kohm diagram. . . I just saw a little. . .            :D

Regards.



EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1024 on: April 30, 2014, 08:58:55 AM »
Hey havuhung,

The hand-drawn circuit diagrams may be the circuit board in Akula's No3 Video clips have all of two pairs of transistors and MOSFET (KT3710 and IRF3710) for two primary branches out tranformer winding flyback ferrite core.

It sure does appear to be the closest circuit I have seen to the Akula0083 Lantern No 3 Demonstration! So far I can not fault the layout of it. Component Values I cant tell the video is not clear enough.

Akula0083 circuit diagram of No3-Disassembly-Lantern. Potentiometer other values ​​instead 20Kohm - 10Kohm diagram. . . I just saw a little. . .            :D

Yeah, I think a little guessing may be needed here but I think we can get pretty close. We know the tunning of the 2x frequencies or the 2x duty cycles exhibited a combined frequency of around 7KHz.

It appears if the Max Frequency the TL494IN can handle is 300 kHz according to the datasheet. Or have I read this wrong?

There are a few differences in the Hand Drawn Schematic compared to the other schematics that have been posted.

I an not picking on the work, but the major difference lies in the track layout to the Run Cap from the Charge Cap. A Diode blocks its charge from one to the other. There are a few other differences also but this is the most important.

Please be wary when building the Circuits from Schematics as only a very small deviation can make all the difference! We all know this already I am sure!

All the Best

  Chris


EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1025 on: May 01, 2014, 01:15:52 AM »
Sorry Guys, I think I have broken the thread! I was trying to explain the Circuit issues.

I hope team OverUnity.com can fix this up for us as soon as possible.

All the Best

  Chris

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1026 on: May 01, 2014, 01:19:35 AM »
Hi All,

Thus far the TL494IN Chip is only good to 300KHz.

Anyone want to check and verify this?

All the Best

  Chris

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1027 on: May 01, 2014, 01:20:59 AM »
Hi All,

I have made some small changes to the Schematic. Revision 1.1 is now current.

All the Best

  Chris

EDIT: Image Removed.

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1028 on: May 01, 2014, 01:24:06 AM »
Hi All,

Apologies, mistake and move around of the Tags.

All the Best

  Chris

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1029 on: May 01, 2014, 01:26:34 AM »
Hi All,

I hope I don't have to re-explain this. Page 69 on this thread appears to be broken still!

Major Circuit Differences

Reference Values used from my schematic

The Charge Cap is C2 (50V 2200uF) with Over flow going into C3 (35V 1000uF) when the Switch is on. Of Course if the switch is on then C1 will also charge!

The Run Cap is C1 (50V 1000uF) This Cap does not get Discharged when either FET's Q1 or Q2 get switched on because of the Diode D4. This Cap is the Cap that keeps the Circuit Running when the Coils get switched and the Capacitor Voltage drops below threshold!

The way the circuit was drawn in the other schematics, all Caps get discharged when either FET get turned on and if the Caps threshold voltage is reached then the entire circuit looses power.

All Caps re-charge from the Diodes after the 19 turn coil. We both know what this means, that there is an off period (Duty Cycle) where all caps must sustain the circuit for a period.

NOTE: The Circuit "схема деда 2.jpg" Translated (Scheme Grandfather 2) which havahung very kindly posted corresponds the closest to the Akuls0083 Lantern No 3 Revision one, with the external switch mode power supply. The circuit is very close to the second revision except for a PNP Transistor missing from one FET.

There may be RC Time Constants involved here also. If the Capacitance is a long way out we will loose the RC Time Constant at the Frequency desired.

Hope this description helps!

All the Best

  Chris

Please Note: TinselKoala did not draw this schematic only added the Values.
« Last Edit: May 01, 2014, 06:12:53 AM by EMJunkie »

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1030 on: May 01, 2014, 02:13:04 AM »
Hi All,

I have posted some more videos on Akula Vids

All the Best

  Chris

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1031 on: May 01, 2014, 02:19:21 AM »
Just so as everyone is aware, I have sent requests to Stefan to fix Page 69.

All the Best

  Chris

hartiberlin

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1032 on: May 01, 2014, 02:43:30 AM »
Hi Chris,
please rescale your pics to 1024x768 or 800x600
before posting them.
You can use the free Irfanview.com
for it.

Many thanks.

Regards, Stefan.

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1033 on: May 01, 2014, 02:44:27 AM »
Hi All,

I was looking at the TL494IN Chip again and some data on it is interesting:
                                               MIN           MAX         UNIT
fOSC     Oscillator frequency       1              300           kHz
CT        Timing capacitor            0.47          10000       nF
RT        Timing resistor              1.8            500           kΩ

Pin 5 is the Timing Capacitor Pin. Pin 6 is the Timing Resistor Pin. Akula has uses a 10K and a 20K Pots and I cant quite read the Capacitor Values. I have guessed them to be 2.2pf and 8.2pf but looking at the sheet, this may be wrong. More like 8.2nf and 2.2nf if the figures are right.

I guess the point is, Akula has half the Pot value from one TL494IN to the other which supports the idea that he was looking for the Phase Shifted Frequency we have previously spoken about. We can also see this in the amount of coil turns 13 vs 7 and also nearly half the Capacitance Values.

See Picture Below:

All the Best

  Chris

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1034 on: May 01, 2014, 02:46:59 AM »
Hi Chris,
please rescale your pics to 1024x768 or 800x600
before posting them.
You can use the free Irfanview.com
for it.

Many thanks.

Regards, Stefan.

Hi Stefan
Very Sorry, my mistake. Sorry everyone for holding the thread up. I will be more careful with Pics. Was late and I did not pay enough attention.

All the Best

  Chris