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

[T-1000]

Some pics for the records

Hi Jeg,

The magnetic field polarities will be on wrong direction with such coil arrrangement. Please see https://www.miniphysics.com/ss-magnetic-field-due-to-current-in-a-solenoid.html for explanation.

Cheers!

[listener192]

Hi PmgR,


Good point. If the presence of line ripple is not a significant factor then suggest using a switch mode power supply with current limiting is used and leave out the 4 ohm resistor. This way initial charging current is limited and just use the super cap bank for supply and recovery.


With the new bridge board, out of registration the current draw was 6A peak from a 25V supply.so 18A with 3 coil sets on, closer to 36A with overlap coils on. This was measured at 10Hz clock. So even with a 40A current limit this should be within the rating of the 45A rating of the bridge board.


When in registration the inductance increases and a single coil set current draw drops to 3A or 18 A in total. As the out of registration coils perform no useful work, the current limit could be set to 20A. If the recovery voltage rises above the current limited supply, then more current could be drawn by the bridge boards without limiting.


Regards


L192

[seaad]

Hi Jeg,
The magnetic field polarities will be on wrong direction with such coil arrrangement. Please see https://www.miniphysics.com/ss-magnetic-field-due-to-current-in-a-solenoid.html for explanation.

possibilitys

Reagards Arne

[Jeg]

Pmgr
Thanks a lot for the analysis.

T-1000
I don't understand your point. Do you mean that torroid cores and normal winding coils can not produce OU as Akula and so many others did many times now? Anyway, i know that i move to something different than what Pierre showed but i have something very specific in my mind to try.

[T-1000]

T-1000
I don't understand your point. Do you mean that torroid cores and normal winding coils can not produce OU as Akula and so many others did many times now? Anyway, i know that i move to something different than what Pierre showed but i have something very specific in my mind to try.

When coils are like in Pierre's contraption they are facing about 20 degrees off the pickup coil core. In your photo they are on 90 degrees. So the magnetic polarities as they produce magnetic lines towards closest opposite pole.
And in regards to Pierre's case it is not just single coil on core, the multiple coils are sharing same core and are positioned with offset to the side on each which allow different 3D location of magnetic poles towards center on each coil powered on.