Thane Heins Perepiteia.

[polarbreeze]

Okay, here are the test results of today. Tests were done on Toroid no. 2 with the 2nd primary I made yesterday...

Need to mathematically model this to see where it deviates from conventional theory. I'll do that for you if you like because I think I'm better at doing that than at building stuff! The parameters needed to "build" the model are the following:

- Source impedance
- Resistance of each of the windings
- Self inductance of each of the windings
- Magnetizing reactance (Xm)
- Core loss equivalent resistance (Rc)
- Number of turns on the primary and on the secondaries

Cheers,
PB

[gyulasun]

Hi Luc and Thane,

Thank you for the test results.  The data you measured indicates to me that the primary coil has got very low number of turns for your 60Hz mains voltage, the coil inductive reactance I think is very small:  at 2V AC input from the variac the 2A current is extremely high and I do think it oversaturates the core the primary is wound on.

If you are aware of this saturation and you designed it on purpose, than it is ok but for me it is an unwanted situation in case of electric transformers in general.  

In oversaturated cores the average current hardly changes when you try to utilize its fluxchange but fluxchange can only occur in your primary when your (sinusoidal) input voltage is small enough not to cause a current level from which saturation starts.  i.e. from ,say, zero to 0.5V AC input there is no or very little core saturation and as the sinus voltage exceeds  0.5V and goes up to your 2V, the current goes to high peak values during this time.  This could be observed by watching the waveform of the current in the primary by an oscilloscope as a voltage drop across a 0.1 Ohm noninductive resistor placed in series with the primary coil. (Be sure to use a mains isolating 1:1 transformer when you derive your 2V from the variac that is fed by the mains directly and use a scope on the mains side too.)

rgds,  Gyula

Okay, here are the test results of today. Tests were done on Toroid no. 2 with the 2nd primary I made yesterday.

Test # 3  -  1 K ohm LOAD

Primary I/P   
2 volts                                                         
1.8 amps
PF = 1
Input Power = 3.6 watts (10% decrease)
Output Power = 0.023 watts @ 4.8 v (194.5 % increase)


Test # 4  -  1 K ohm LOAD

Primary I/P   
1.75 volts
1.88 amps
PF = 1
Input Power = 3.29 watts (17.8 % decrease)
Output Power = 1.05 watts @ 32.4 v (1887.7 % increase)

[jacksatan]

satan is that what you deduced from test #4  please  take another look  Chet

I think I have made it relatively clear in the past that I am no scientist... So while I do see that there are likely anomalies which need explanation as to why/how there is a change in power output from a change in setup, I still see the most important data being the raw number as baseline efficiency so that in future tests we can assess better/worse/same - unless of course the concentration over here has switch over completely to a more efficient way to increase voltage, but I didn't really get that vibe...?

But as always, when dealing with things that I am admitadly less than an expert in, I'm open for any clarification you might have in what would be more informative from test #4...

[gotoluc]

Hi All,

Here is a link to my YouTube account with a new video (shot today) of the Tests done on Thane's Toroid no. 2 that were posted yesterday.

Link: http://ca.youtube.com/watch?v=BJqnfR3B4oc

The results of this video are posted here: http://www.overunity.com/index.php?topic=4047.msg81689.html#msg81689

Enjoy and stay tuned.

Luc

[ramset]

LUC  Nice video  Thanx for  keeping us in the loop    Jack  please take no offence