Confirming the Delayed Lenz Effect

[CRANKYpants]

THIS POST WAS EDITED

I added an Amp meter on the DC side of the inverter and it idles at 400ma (nothing connected on output) and under load it's at 1,130ma - 10 Ohm Load Resistor with 6.52vac across it and the Shunt is 1 Ohms.

Luc

OK - THE OUTPUT IS 4.25 WATTS... WHAT IS THE DC INPUT VOLTAGE MR. MASTERBOATER?
12 VOLTS?

CHEERS
T

[gotoluc]

Harmonics distortion (maybe due to resonance and saturation of the core)

It's not Saturation!... this is a 300VA Toroid. It will not Saturate at this low of a Current input.

Please note that this only happens when using the Sine Wave Inverter and not when Connected to the Grid.

Luc

[nul-points]

hi Luc
[...]
i've seen something like this recently - will check

thanks
np

yeah, this is what i remembered seeing - a YT video by user 'selfonlypath' showing results obtained with his 'Transverter' setup (2x MWO trafos modified & connected together, then driven with an 'H' bridge)

  http://www.youtube.com/user/selfonlypath    eg., see 'Transverter 1'


at a combination of resonance and with the i/p volts just passing thro' a threshold, the o/p sine wave 'snaps' into a more triangular waveform with elongated peaks

the snapshot below captures the moment when the o/p changes from a sine to a 'triangular' wave with peaks


of course, you may just dismiss people's contributions as 'being on drugs'   ...but you did ask for feedback   

cheers
np


http://docsfreelunch.blogspot.com

[gotoluc]

Hi Luc,

I still think the transformer core starts saturating (even though its primary AC current is just under 700 mA in your latest test when you had 22 Ohm shunt resistor in series with the primary coil).  The time-coincidence of the red scope waveform's spikey peaks with that of the green input current shows this I believe.

In the link below  you can see a scope shot on current shape through a saturating inductor (note: there is a misprint, D4 in the text below the schematic should read as D3).
Here is the link:
http://www.dos4ever.com/flyback/flyback.html#ind2 

What output power is the sine wave inverter manufactured for, just curious, I do not think you overload it.

Gyula

Hi Gyula,

you may want to edit your post (if you still can) Please look at the Replacent scope shot above.

Regarding the peaks, it's not Saturation of the core. This is a 300VA Toroid, it takes much more current then that to Saturate it. Also, please note that these peaks only happen when connected to the sine wave Inverter. When connected to Grid there are no Peaks. See post with Grid scope shot on the next page

The Inverter is rated at 1000 Watts Continuous. Paid $300. for it

Thanks for your time

Luc

[gotoluc]

OK - THE OUTPUT IS 4.25 WATTS... WHAT IS THE DC INPUT VOLTAGE MR. MASTERBOATER?
12 VOLTS?

CHEERS
T

Yes, 12.3 Volts DC

Thanks

Luc