Sharing ideas on how to make a more efficent motor using Flyback (MODERATED)

[verpies]

Really?
Myself and Luc have been saying this for weeks,and Poynt finally thinks there may be a way that the inductance of the coil can be increased by way of a PM's field,and he is the first in this line of thinking???.

I don't keep good track who stated what first because I concentrate more on the knowledge than on the chronology, so I apologize if I stepped on some toes.
I came back from a trip and jumped in by replying to one post, without analyzing the previous ones.

So often we see the little guys discovering effects like this,and the so called big guns taking credit for it.
Well Luc showed it in 2011,so you EE guys are only 4 years behind.

The aforementioned "line of thinking" did not refer to the existence of this phenomenon or its application to your DUT but to its explanation along those lines.

Cheers,

P.S.
The increase of inductance is a property of the core - not the coil itself.  Precisely, the increase of differential permeability of the core in one dimension...

[Magluvin]

Just read a post from Smoky in an unlikely thread and it coincides with my electric bike anomaly with backing off the throttle and getting more go.


"using pulsed-power signals to run those motors has had a lot of success in lowering power requirements per lift force.
increasing the runtime for the copters and gyros
as it turns out, pulsing the motor doesn't change the momentum a whole lot, so you still maintain a stable lift/wind force.
but run the motor at the same rpm, using a lower/shorter duty cycle."

http://overunity.com/16308/electret-antenna-out-of-an-coaxial-cable/msg470452/#msg470452

Mags 

[sm0ky2]

P.S.
The increase of inductance is a property of the core - not the coil itself.  Precisely, the increase of differential permeability of the core in one dimension...

Bringing a secondary field (PM or EM) near the coil/core will increase its' inductance, AND reluctance.
in a rather symmetrical manner.

what you gain in increased induction, you lose in increased current draw to make the effect possible.

regardless of the orientation. one half works with the field, the other half works against it, and they cancel each other out.

[verpies]

Bringing a secondary field (PM or EM) near the coil/core will increase its' inductance, AND reluctance.

Shouldn't that be ?:
Bringing a secondary field (PM or EM) near some cored coils will increase their inductance AND permeance.

[gotoluc]

Hi everyone,

I would need help to find a simple software that I could print a circle of up to 6 inches (15cm) in diameter on white paper. It needs to be pie shape in black for my optical reflector switch off times. It's very simple, if my motor rotor has 8 poles (on times) then the circle would have 8 black pie and 8 white pies equally spaced in the circle. That's all I need but I can't seem to find anything.

So please help my out if you know of something or have some time to look.

Thank you for your help

Luc