Homopolar generator idea

[shylo]

 the voltage is a result of electrons being forced to move inside the disc which has it's own resistance?
Voltage=Current(electron flow)x resistance?
Do the stators contact points absorb all of the moving electrons,or can we add more collection points?
Or since there is only a given amount of resistance, there can only be a given amount of flow?
artv

[seaad]

,or can we add more collection points?
Or since there is only a given amount of resistance, there can only be a given amount of flow?
artv

I've tried with four collecting "brushes" (2 + 2).
Nothing extra only more brush braking.

Regards Arne

[Belfior]

what if you just make notches on the wheel? To make the current pulse

Then make one coil in the rotor and then another coil in the stator. Would that not gather the current and no need for brushes?

[F6FLT]

the voltage is a result of electrons being forced to move inside the disc which has it's own resistance?
Voltage=Current(electron flow)x resistance?

Not exactly. The electric field that electrons feel is E=VxB (vector product, V their linear speed, B the field). This has to be integrated along the radius to get the voltage because V=∫E.dl.
Say v=10m/s at the half-radius, B=1T, disk radius = 10 cm, then V ≈ 0.5V.
Then I=V/R gives you the short-circuit current.

Do the stators contact points absorb all of the moving electrons,or can we add more collection points?
Or since there is only a given amount of resistance, there can only be a given amount of flow?
artv

I don't understand the question. The contacts simply add a resistance in series in the circuit.

[F6FLT]

I've tried with four collecting "brushes" (2 + 2).
Nothing extra only more brush braking.

Regards Arne

That's why in Tesla's patent brushes at not on the rim. The rim is the worst position for brushes because the speed is maximum and so is the friction.