Pierre's 170W in 1600W out Looped Very impressive Build continued & moderated

[d3x0r]

Hi seaad,


1) This is indeed a bit strange, if the supercaps are low in voltage, I would expect a large inrush current, but maybe the supercap boards have some current limiting.


2) This would mean this 25.1V is the max voltage that the transformer can put out after rectification and the caps are charged up to that so current draw goes to zero. This would be the peak voltage of the secondary.


3) I believe Pierre states in his first video that the transformer is home made. Mains is 170Vpp, secondary is 25Vpp, so winding ratio is 6.8, or 1.5A at primary becomes 10A at secondary which would cause 40V voltage drop over resistor... so indeed this doesn't make any sense... Only thing I can think of is that the primary current meter is not reading correctly.


PmgR

(Videos are gone from Pierre)


(You couldn't have > 6A ... E=IR (I=E/R) not I > E/R )


so 25V input across 4 Ohms (count 0 Ohms for capacitors?)  is max 6.25A


140V:25V = 1.1A : 6.25A.  that is input has to be at least 1.1A doesn't mean it couldn't be more...


suppose it's a lossy transformer? ...

[seaad]

Hi seaad,

1) The numbers on the figure doesn't add up.

2) I agree with PmgR that the meters aren't correct calibrated for the waveform. The output of the device isn't a pure sine wave and it is of low frequency. Cheap meters usually measure mean value and thus are calibrated to show the correct RMS value for a sine wave. As the form factor of the wave isn't the same as that for a sine wave such meters will show the wrong value.

3) An oscilloscope would be preferable for the measurements or the current could be measured through the resistor which is put between the two filter capacitors. At this point the waveform must be close to DC.

Regards
Ole

1)   The numbers on the figure doesn't add up. Correct. That was the purpouse of my post.   I. e.  An eye  opener.

2)   I agree with YOU and PmgR that the meters (maybe) aren't reliable. At this time in the film as I'm refferring to  Pierre is still using the 60Hz wall outlet with a good sine wave. Both when charging the super caps and running his unit.

3) Fully Agree.

@d3x0r Quote: (Videos are gone from Pierre)      Strange?
                           
                           (You couldn't have > 6A ...    Certainly.  Pierres transformer: 26V (30 A)  Peak value 35.7 Volt maximum rectified level.


Regards Arne

[listener192]

Funny that the image shows that he wants to solve the problem with 4 poles instead of 6.  In order for him to do this he would have to replace each coil to a 9 pole bridge instead of his 6.  Always look at the pattern.  For a 4 pole to work correctly, you would need to trigger 9 coils in series with a bridge gap of 9. Do you see his pattern?   This means we might have problems doing our setup with the same bridged poles as the 36 pole.  It should be 5 to match his same configuration.  [size=78%]I beginning to realize why the overlap in coil windings will be a problem.  I can see how his new configuration will work better!

I also believe we could do this method of pulsing on a toriod completely solid state. 

I was also able to place the priming sequence of coils to visualize the arrangement.  My original post had a wrong pin number, 14 should have been 13.  The reason for this PIN change is because all odd relays are on the outside and even relays are on the inside.  See image.  I still don't understand why he is priming the entire stator prior to sequence.  Maybe this image will help others.   

Jerdee

Yes, a larger stator with more slots, so you can reduce the polarity overlap would improve efficiency, still his scheme produces OU irrespective of its faults.

The priming issue is reminiscent of the permanent magnets in an alternator rotor, which are there to provide some output from the stator coils, which in turn energize the rotor with DC, starting the whole current generation process.

Regards


L192   

[listener192]

This was the FWBR used by Pierre.

Crydom EFG13C  125A continuous, 2500V

Somewhat overkill due to the 4ohm current limit resistor.

L192

[d3x0r]

Falstad Sim


current through 2 coils in series (with simulated 10 ohm resistor) is 2x the current per coil  (4x total, since both get doubled)
It's also 4x the power disappated across each coil (8x total)


Magnetic field is L * I * coilParams; so for L being the same, being able to increase current(I) will increase the field.