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Author Topic: Kapanadze Cousin - DALLY FREE ENERGY  (Read 6114351 times)

Offline itsu

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17430 on: June 18, 2017, 11:15:36 AM »
  Actually, is was the Ruslan (Oleg), Stalker, PinoyTech designs combination.  I adopted some of the their ideas.
  I took a little from each one of them for my version of the TL494/Uc4420 yoke Kacher/grenade circuit.
  Maybe it's not good to mix and match...?  We'll see.

  I found late last night that my Pin 2 was not directly nor "solidly" connected to the rest of the other 3 pins, #13,14, and 15 pins. Pin #2 is just connected to the 4.7uf cap positive side, but not to the rest of the group of the 3 other pins.  I'll fix that later today.
 Hopefully, that's the problem.



      Well, that WAS the problem. I connected the #2 pin back up to the rest of the three pins of that group, and I now have good clean signals at the fets gates throughout the entire duty cycle and frequency range. Thanks for the help with that, guys.
 But the MOSFETs are still getting too hot, like as if there is a short somewhere.  I'll be looking into that later tonight.

   So, one problem solved, but one more to go.
   And just now my PC won't start. Can't win for losing.



Nick,

great, now take it to the next step.

(re)connect the MOSFETs to the 10K resistors or automotive bulbs as suggested earlier and scope the gate / drain signals for each MOSFET one by one.
They should show some fairly nice square wave like signals without the MOSFETs getting hot.
Run it through the frequency and duty cycle range to get a feeling of what the different setting do to the MOSFETs signals.

Itsu

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17430 on: June 18, 2017, 11:15:36 AM »

Offline verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17431 on: June 18, 2017, 01:59:05 PM »
the 2 opamps control the same logic you can't have two drivers controlling the same logic IT LOCKS UP !  sorry, Verpies. ;) no offense intended ;)
None taken, but no warning is necessary because when pins 1&16 as well as pins 2&15 are connected together, then the outputs of these two error op-amps are identical and there is no conflict.  Also, the OR-ing provided by internal diodes prevents any conflicts.
The TI Datasheet clearly states:
Quote from: TL494 Datasheet Section 9.3.6
Both amplifiers behave characteristically of a single-ended singlesupply amplifier, in that each output is active high only...
With both outputs ORed together at the inverting input node of the PWM comparator, the amplifier demanding the minimum pulse out, dominates.

If you want to, you can disconnect/disable one error op-amp by disconnecting pins 15&16 in my diagram and connecting pin 15 to pin 14 as well as connecting pin 16 to ground.

Offline seychelles

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17432 on: June 18, 2017, 03:42:02 PM »
hi pinoy-tech, thanks for sharing the pcb layout. just wondering if you have the gerber file
 for this pcb  acr 576 so that i can get the Chinese to replicate it please .

Offline AlienGrey

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17433 on: June 18, 2017, 09:40:59 PM »
hi pinoy-tech, thanks for sharing the pcb layout. just wondering if you have the gerber file
 for this pcb  acr 576 so that i can get the Chinese to replicate it please .
Hi Seashells  silly question but why would you want to make a copy of that inverter for ??? wouldn't it be just as easy to plug a 240v bulb into the mains ?? his supply is coming of that computer plug I presume is 240 volts top left of middle of screen befog the 240 to 12v TL494 supply TX.

Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17434 on: June 19, 2017, 01:50:43 AM »
hi pinoy-tech, thanks for sharing the pcb layout. just wondering if you have the gerber file
 for this pcb  acr 576 so that i can get the Chinese to replicate it please .


  He had uploaded some PDF files previously before he went on vacation.  Look for them around March 20 or 21st. 
  Or he may be persuaded to post them again. They are based on Ruslan's or rather Oleg's earlier TL494/UC4420 driver board.  Which is what Stalker has also simplified and is using a version of, presently. Same as I am, as well.

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17434 on: June 19, 2017, 01:50:43 AM »
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Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17435 on: June 19, 2017, 06:20:23 AM »
  Here's another short video showing the TL494 circuit and the TC4420 fet drivers in action. Signal problems fixed.
  Thanks to all for your help.
   https://www.youtube.com/watch?v=sc-kXOt9L7Q

   I'm still working to solve yet another issue with the fets, and I'll know more about that shortly.  I hope.

Offline itsu

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17436 on: June 19, 2017, 10:51:16 AM »

Nick, 

thanks for the video, signals looking good.

I think your scope is set at 0.2ms/div, so at max frequency setting of your pot, it shows 9 pulses across the 10 divisions, making it (2ms/9) 0.22ms / pulse = 4.5KHz.
Thats kind of low as you probably would need something like 17Khz lateron.

What is your C4 capacitor at pin 5?    Is it 1nF?   Seems to me its much more.

Anyway,  now with the yoke disconnected and the 10K resistors in place, scope the gate and drain signals of each MOSFET, they should be stable now too.


As i have the lossless clamp design primaries on my yoke i can not check if your primaries are wound OK, but from memory they are ok (all turns the same direction).
Perhaps others can confirm this.


Itsu

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17436 on: June 19, 2017, 10:51:16 AM »
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Offline AlienGrey

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17437 on: June 19, 2017, 12:51:17 PM »
TL494 driver device. Notice 3 control pots PW Dead Time (2nd  PW over ride of PW) later removed as error amp shuts down device.


Also observe oscillograph of what looks like unstable driver stage. Went through all circuitry and re wound yoke found unstable wave to be ferrro related. Spoke to T1000 and note in later rewind yoke problem removed.


Notice 3rd pot removed (dead zone wiper connected to 0volts
« Last Edit: June 19, 2017, 04:42:28 PM by AlienGrey »

Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17438 on: June 19, 2017, 04:59:53 PM »
  Itsu:
  Thanks for checking things out, as well as doing the math.
  I believe that that scope readings were taken on the .5/div setting. Not the .2/div.
  The ceramic cap placed on pin #5 is a 102. So, that part should be ok.
  Today I'll be looking into the mosfets and their connections to see if I can find any problems there. As there does seam to be something not right when comparing the two fets and their scope signals. I'll know more about that later today.

   Pinoy_Tech:  Good to see you back, and posting again.
   Thanks for the information and details on your Tl494/UC4420 circuit. Although it took me a while to see what my problem was with it, I think that it's working pretty well, now. Thanks again for posting your design.  As it was similar to what I wanted to build, I thought I'd build it just like you designed it, but with a just few modifications in order to simplify it to bare minimum components.  I'll continue testing it, and connecting it up to the rest of the device today.
   
   

Offline itsu

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17439 on: June 19, 2017, 09:24:39 PM »

Quote
I believe that that scope readings were taken on the .5/div setting. Not the .2/div.
The ceramic cap placed on pin #5 is a 102. So, that part should be ok.

Nick,   i think you are right, 0.5ms/Div., however that makes it even worse as your max. frequency then would be 1.8Khz or so.
If you have a 1nF cap as C4, then Rv2 + R2 cannot be the mentioned 50K + 2.2K else your frequency would be between 12Khz to 200Khz.

Double check your 50K pot and R2.

Itsu

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17439 on: June 19, 2017, 09:24:39 PM »
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Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17440 on: June 20, 2017, 03:04:00 AM »
    Both pots are 50K. Resistor is 10k. Cap is ceramic 102.
   But there's something else wrong as I only get 4 volts out of the 15v regulator, and it's new, I installed it just a couple of days ago. First time that I tested it though. I can maybe run the drivers on 12v, for now.
But, I'll probably have to order more FETs, if I don't find any more good ones left around here. As it looks like I also burnt one of the two FETs, again.  Something is not right, with that, as well.

Online Hoppy

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17441 on: June 20, 2017, 09:50:54 AM »
    Both pots are 50K. Resistor is 10k. Cap is ceramic 102.
   But there's something else wrong as I only get 4 volts out of the 15v regulator, and it's new, I installed it just a couple of days ago. First time that I tested it though. I can maybe run the drivers on 12v, for now.
But, I'll probably have to order more FETs, if I don't find any more good ones left around here. As it looks like I also burnt one of the two FETs, again.  Something is not right, with that, as well.

Nick,

Have you got small ceramic caps across the input and output of the 15V regulator? STMicroelectronics data sheet shows 0.33uF on input to ground and 0.1uF on output to ground.


Offline verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17442 on: June 20, 2017, 04:57:38 PM »
STMicroelectronics data sheet shows 0.33uF on input to ground and 0.1uF on output to ground.
These caps also have ESR limits.  Without them the linear regulator can oscillate.

Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17443 on: June 20, 2017, 08:48:53 PM »
  Hoppy:
  I've got two filter caps at both the input as well as at the output of the 15v regulator. They are the ones that are recommended by Ruslan's circuit diagram. The 1000uf and also the smaller 104J capacitors, on each side of the regulator. But, if I disconnect the output side of the regulator, I get 24v on the input of the regulator, but no voltage on the output side of the regulator. So, it's gone bad.

  Funny thing though, last night with only 4.2 volts somehow getting to the UC4420 drivers, possibly somehow through the ground side of the regulator, which was still connect up, I WAS getting a square wave signal at the drains. First time.  But, somehow connecting the drivers inputs up to 12v from a battery, I get no drain signals at the drains.
Plus now, not only are the gate signals clean, but they are back to the gates firing at the same time. And the duty cycle going to 100%. So, get that... for a learning curve to unwind.

Offline AlienGrey

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17444 on: June 20, 2017, 09:19:13 PM »
These caps also have ESR limits.  Without them the linear regulator can oscillate.
we always use to use 0.47 Uf Tants they were recomended by the manufactures and never vhad any trouble with instability.

with the torerroid use a 4.7 uf (Good quality) where the power goes into the coil and the driver device MosFets Sauce or Igbts emitters and keep the wires as short as possible.

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #17444 on: June 20, 2017, 09:19:13 PM »

 

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