Akula0083 30 Watt Self Running Generator.

[EMJunkie]

It appears that you are using AC-coupling on both channels of your oscilloscope. The little sine wave symbol next to the channel vertical attenuation settings indicates AC-coupled, if I am not mistaken. Is there some reason for that?

Your scopetraces, which are labelled Input Voltage and Input Current.... are only showing the ripple or switching transients which are sitting on top or bottom of the true signal voltages, because the use of AC-coupling has removed any DC or non-varying component of the signal. Hence any math performed on those traces will be incorrect, unless you know and use the value of the DC offset that has been removed by your choice of AC-coupling.

(I'm not challenging your basic conclusion or interpretation.... yet.... I'm just wondering about your scoposcopy.)

Hi TinselKoala,

This is a good question. To be honest I cant say why exactly other than it seemed best to use AC Coupling as the wave has an AC Component to it. You're quite right however, it could have been a good idea to use DC Coupling. Also I was switching Bi Polar, using a H-Bridge and it also seemed logical to use AC Coupling.

If you would prefer to see a DC Coupled shot then let me know and I can post one.

All the Best

  Chris

[EMJunkie]

It appears that I owe Roman (Akula) an apology...

/....

~A

Hey Avalon,

Great Post! I could not agree with you more! Lets all work together and not bicker and squabble like little kids.

"We believe in the systematic understanding of the physical world through observation and experimentation, through argument and debate, but, most of all, freedom of will."

All the Best

  Chris

[bolt]

i concur to reiterate the "magic" in all of these looped devices lay in the coil construction, design and core material and there are many  seen over recent years.

There is no need to try and blindly follow other peoples schematic!  The use of switiching power supplies is not compulsory.  The type and model numbers NOT important.  Who cares if he opened his or not?  WHY would he? Well if it was me i would change the standard mains bridge diodes to HF high speed diode types for  start particulaly when ferrite squeeling pig generators tend to work best on over 15khz:)

A bench test with signal generators can yeild the required results IF you know what to  look for.   The Russian TV Yoke is open source i suggest people start there.   Self contained driving circuits come LATER after principle operation of the core yeild the results. It really doesnt matter if you use a PLL, PWM  IC or a 555 as a signal driver.  This is the  EXACT reason why Akula has so many design varations.

[EMJunkie]

Well, if you want to know more, the best option to discuss abuot is - in voice session.
And I tried to gather everyone before for making understanding and exchange of ideas between people - http://www.overunity.com/14378/akula0083-30-watt-self-running-generator/msg397514/#msg397514

Hi T-1000,

This is a great idea. I have tried this in the past but the biggest problem I have found is time zones. We all live in different time zones and its not always east to communicate with everyone at a single time for other reasons like Kids bed times and son on...

Keep up the effort though, if only one idea were to be passed between everyone here then it is of benefit!

All the Best

  Chris

[EMJunkie]

i concur to reiterate the "magic" in all of these looped devices lay in the coil construction, design and core material and there are many  seen over recent years.

There is no need to try and blindly follow other peoples schematic!  The use of switiching power supplies is not compulsory.  The type and model numbers NOT important.  Who cares if he opened his or not?  WHY would he? Well if it was me i would change the standard mains bridge diodes to HF high speed diode types for  start particulaly when ferrite squeeling pig generators tend to work best on over 15khz:)

A bench test with signal generators can yeild the required results IF you know what to  look for.   The Russian TV Yoke is open source i suggest people start there.   Self contained driving circuits come LATER after principle operation of the core yeild the results. It really doesnt matter if you use a PLL, PWM  IC or a 555 as a signal driver.  This is the  EXACT reason why Akula has so many design varations.

Hey Bolt,

Exactly!!!

20 other models worked with no DC Switching Power Supply. You've hit the nail on the head! Excellent Post!

All the Best

  Chris