Simple to build isolation transformer that consumes less power than it gives out

[Jack Noskills]

I tried to determine what is the efficiency of the big nanoperm trafo in normal trafo mode but I was unable to do that. Damn watt meter showed 0 watts at output all the time, seems that it needs L and N lines before it works. Then I measured the idle power which was actually 134 watts and this means that light comparison with halogens is not fair. There is OU but figures are most likely somewhat off in halogen test. It is nice though that when in generator mode the idle power drops below one watt from 134 watts.

Finally I measured again 40 watt load and bulb was bright as usual, it is certainly above 20 watts and most likely below 30 watts. Watt meter showed 0 and 6 watts alternatively on the grid side. So still looking good though I made a mistake with trafo efficiency estimation, I now think its efficiency is below 50 %. There is still room for more wire, maybe I wind some more, not sure about that.

[Jack Noskills]

There is EVM board available,

http://www.ti.com/lit/ug/sluu308/sluu308.pdf

costs 49 dollars, output 2 amps 24 volts at 600 kHz, well in nanoperm range. Makes one think...

[TinselKoala]

There is EVM board available,

http://www.ti.com/lit/ug/sluu308/sluu308.pdf

costs 49 dollars, output 2 amps 24 volts at 600 kHz, well in nanoperm range. Makes one think...

Output is 24 volts, 2 amps DC, with a small ripple. The 600 kHz is the internal switching frequency.

Makes one think.... indeed.

[Jack Noskills]

I read the specs and you can take the square wave as output via one pin, if I understood the spec correctly. Of course if it is only DC then it is of no use. I have a hardware guy who can double check this for me if I want to try this out. First I would need some other gear which I can possibly get for free for limited time. If I can put 600 kHz via nanoperm, then I will consider this EVM if hardware guy says there is square wave output. I also need to check first how the square wave behaves when it goes via nanoperm core. If I would see clean sine wave at output then there is chance EVM could work here. Plot thickens as new twists occur... I will keep you posted of my progess, if any.

[T-1000]

The basic logic behind all of this should be inverted and I think this is what Jack is experiencing.  The maximum power consumption without load and minimal consumption with load because the load itself is what is cause of increasing impedance in primary coils of transformers...