Not sure what your asking. A rotating magnetic field, without some conductor within that field, is, simply put, a rotating magnetic field - nothing more.
LG, if the OP were to vary the speed of the motor (up and down, by varying the voltage driving it and, thus, the frequency of the AC field being produced), that would help indicate if resonance is being achieved.
Hi CB.
That is what I was kind of trying to say in one of the posts above. I have a BLDC out runner, it has a huge speed. Originaly it came from this........
https://www.silabs.com/products/development-tools/mcu/8-bit/c8051f850-motor-control-reference-design
I still have the Kit but I swapped the BLDC motor for a even more powerful one (beefed up the driver as well), I didnt get to try it much as I burnt out the pick up coil! Hence why I have to order more magnet wire to wind another coil.
In my tests I found the speed did affect the output, so in one of the above posts I was asking the OP to try it himself. On the Oscope you see a frequency from the coil that matches (pretty much) the RPM of the motor. So I am 99.9999% sure its resonance. Whats interesting though is the magnet inside the coil, vary where you put the magnet and you get a better output. My assumption is the magnet just helps focus the magnetic waves. But I am making a guess here.
OP
As to your question...........I dont know how those leds are wired, it could be series string that are paralleled together. The higher rated one would have more parallel strings so need more current. The two lower ones I am guessing you wired in series?
Stop for a bit........... I need to order some more wire etc from ebay, your AC voltage was reading that high because its not really a good sign wave generated, I dont know why but its almost square wave on the scope. Very messy and dosnt go negative much, So I dunno if you would call it AC or not. To me AC is the same Neg as pos. Also I dont know if your meter is reading RMS or not. What meter you got?
As to some answers try different loads
. You happened to pick leds which is good and bad. Do you understand how Leds work? I ask because at the moment I have zero idea how much knowledge you have, no point me explaining something you know.
The magnet without a coil will produce nothing, can you get hold of an old hard drive? You want one that has the neo horse shaped magnets in
. BUT DO NOT use them yet!!!
With the way its going you just might stumble on enough juice to kill. The other question is what meter measured 1540V!!!! I have some decent meters including 5.5 digit bench meters and a 6.5 digit bench meter. NONE can go over 1000V.
This is why I think the meter just gave you a reading, I dont think that is accurate at all, but I might be wrong, you have have a kick ass meter that can measure that high!!
Now here is the truth bit...................................
Your not learning much at the moment, your doing half experiments. I kind of did this 5 years ago when I started playing around with stuff. You quickly learn that doing things this way is fun, but it dosnt teach you a thing, except stuff like high voltage can make you scream ouch, soldering irons can leave marks that dont go. Burning finger nails smell bad for weeks.
SOooo make a choice, do you want to play and have fun. Or do you want to play and learn? Magnets and coils are really interesting, I love generators of all kinds. But you need to start doing things properly. Spinning a magnet inside a coil with a motor, dosnt always make a generator the way you think. As shown above you actually made a generator with the magnetic fields from your motor.
If you really want to explore this get some magnet wire (couple different gauges), get something to wind the wire onto so it makes a coil. I often use the case from plumbers PTFE tape.
But different size coils are also good to explore, the idea is we can show you how altering different things changes what you see. For example the motor I have will top 100,000 RPM and pull about 17A (roughly). I can vary the speed from 10 RPM all the way near to top speed (cant go top speed because it vibrates the board to death). So with the right magnet on the right coil I could generate alot of Voltage with decent current. If I use alot of thin wire for the coil I get mainly high Voltage but not many Amps, if I use less wire that is thinker I get lower Voltage but decent Amps.
But here is the nasty bit.....
I wont go along with this until I am sure your going to do things properly, my concern is you learn just enough to go off and be dangerous. Your motor with the right coil and magnet could kill you. If you want to learn then for now drop the quest for really high voltage, you dont need it to light leds. You can light a led with 3V and 1mA, for now lets aim to keep the voltage under 30V. But we can try and up the current a bit.
Once you start learning how it all works and relates then sure we can go for serious Voltage. But FFS lets do it safely ok. Oh and just for a laugh can you get hold of a small neon lamp? The type found in those screwdrivers that tell you if a socket is live?
Or I am happy to hand you over to TC if you prefer that.