Thane Heins Perepiteia.

[Frederic2k1]

Thane, luc and so on, thank you for offering the results but I have an important question.

With which type of pulses are you pulsing the bi-toroid transforma and how high is the frequency ?
At high frequency und non sinoidal pulses it will be more difficult to measure the real input current.

[OilBarren]

Thane, luc and so on, thank you for offering the results but I have an important question.

With which type of pulses are you pulsing the bi-toroid transforma and how high is the frequency ?
At high frequency und non sinoidal pulses it will be more difficult to measure the real input current.

60 hz AC IS WHERE WE ARE AT.

Thane

[polarbreeze]

...I HAVE UPLOADED OUR TESTS DONE YESTERDAY TO MEGAUPLOAD...

This is starting to look very interesting, Thane. There are now several data points for the configuration that has a turns ratio of 3.84: that's three of the four tests from the last batch, plus test 5 from this batch. The results seem to be quite consistent. Some observations:

1. The voltage readings are predicting the turns ratio with a standard deviation of about 0.6% so this gives confidence that your voltage readings are contributing an error in that range, which is quite small.

2. Your output power reading depends critically on the precision of the 1Kohm load resistor and I don't recall seeing any indication of what tolerance this resistor is. If it's 10%, say, then this has to be added to your margin of error. You can eliminate this error almost completely though if you do a precision measurement of that resistor and then use the measured value in all your calculations.

3. The difficulty remains that the input current readings cannot be relied upon at all because of the use of the clamp meter and because the readings are so low that they remain in the final digit of the display. This can be easily resolved by removing the clamp meter and instead placing a true rms ammeter in series with the supply to the transformer (ie in the red wire that's shown in the picture passing through the clamp meter). You need to be able to resolve down to +/- 0.1mA in order to tighten up the margin sufficiently (ie +/- 1% - tighter would be even better of course). I'm sure it will be no problem to locate such a meter at the U, it's not a very demanding spec. Be sure to take your input voltage reading on the transformer side of the ammeter, not on the supply side.

I really look forward to seeing the next batch of results!

PB

[OilBarren]

...I HAVE UPLOADED OUR TESTS DONE YESTERDAY TO MEGAUPLOAD...

This is starting to look very interesting, Thane. There are now several data points for the configuration that has a turns ratio of 3.84: that's three of the four tests from the last batch, plus test 5 from this batch. The results seems to be quite consistent. Some observations:

1. The voltage readings are predicting the turns ratio with a standard deviation of about 0.6% so this gives confidence that your voltage readings are contributing an error in that range, which is quite small.

2. Your output power reading depends critically on the precision of the 1Kohm load resistor and I don't recall seeing any indication of what tolerance this resistor is. If it's 10%, say, then this has to be added to your margin of error. You can eliminate this error almost completely though if you do a precision measurement of that resistor and then use the measured value in all your calculations.

I really look forward to seeing the next batch of results!
PB

BE CAREFUL PB YOU WOULDN'T WANT PEOPLE TO THINK YOU ARE A SOFTY!
YOU MIGHT LOSE YOUR P-BS STATUS IF YOU KEEP IT UP.
HEALTHY SKEPTICS (ESPECIALLY PRICKS) ARE THE BEST MOTIVATORS.

OUR 1 K RESISTOR IS +/- 1% ACCURATE.

Thane

[LarryC]

What's it's worth to you guys for me to swear that no matter what I did I just COULD NOT get the pics under 50K?

THANKS JM

I HAVE UPLOADED OUR TESTS DONE YESTERDAY TO MEGAUPLOAD WHICH SHOWS THE PRIMARY INPUT POWER DROPING 8.99% FROM 12.13 mW (TEST #3) to 11.04 mW (TEST #5)

WHILE THE POWER ACROSS THE LOAD INCREASES BY 6525% FROM 0.064 V TO 4.24 V (TEST #3 and TEST #5 RESPECTIVELY)

AT A CALCULATED EFFICIENCY OF 163% +/- 35% (margin of error)

http://www.megaupload.com/?d=PKCL9JEM

Also - Please find enclosed our transformer performance demo video wich shows the primary input dropping as the output across the load increases...
http://ca.youtube.com/watch?v=BJqnfR3B4oc

Wow!!!! Great job guys.

Thane,

It appears that you are now using a long thin primary. Is this part of your new success or is it just due to the lack of space?

Regards,
Larry

Ps. Thanks for the laughs, it really helps.