couple questions

[mr_bojangles]

so lets take an incline and allow a disk magnet to roll down it

lining the sides of the incline are coils for magnetic induction

now what would be the ratio for generating capacity of the disk magnet in relation to mass and strength of the magnet?

obviously EMF would act to slow down the magnet, and if it were too much the disk would stop rotating

taking this into account, what is the ratio of energy between raising the magnet to the top of the ramp vs. the energy generated by having it roll down the ramp

second question

if you had two magnets, (a) and (b), of the same mass but (b) being twice as strong in field strength as (a),

(assuming the same number of conductors spaced the same distance relative to the magnet)

what would the relationship be between generating capabilities

would (a) and (b) generate the same amount of electricity, because Lenz Law would act more against the stronger magnet,

or would (b) generate more, being slightly more efficient but still not enough to raise itself to the top of the ramp

or possibly (a) would have greater output for reasons unknown to me

cross my fingers someone has any idea what im talkin about

this one has me a little confused whenever i think about it


thanks in advance,

until next time

[mr_bojangles]

basically i want to know the relation between mass and strength in a magnet,

easier version would be if i made a crank generator and i have 2 magnets that i can swap out

with the same set up,

and same mass, one being twice as strong as the other.

i crank it the same amount of times using each magnet and i charge a battery

which one would be more efficient?

which yields more, or would it be the same yield of energy?

good luck

[the_big_m_in_ok]

mr_bojangles said:

...basically i want to know the relation between mass and strength in a magnet, ...

Okay, then, in either case, what you have is the action of an AC motor.  The faster the AC rotor turns, the more power is generated and produced.  Similarly, the steeper the ramp, or the more magnets along the ramp, the greater power produced.  Both have increasingly "wild" frequency variance in magnitude as speed of movement is increased.

There should be electrical physics texts, with math calculations, that can show you how to predict the power produced if you can transfer effective motion between the ramp and motor.

--Lee

[mr_bojangles]

i guess the easiest question to ask would be


does using a stronger magnet in a generator mean greater output if the mass stays the same

what i don't know is will the back EMF  induced by the stronger magnet just cancel out any possible gain from using the stronger magnet

the only correlation i can see is that the more mass, the more angular momentum which would achieve a flywheel type affect

i feel like it makes sense that the stronger the magnet and the less mass the more efficient the generator would be but i want to make sure

bc if thats true than im almost positive theres a loop hole in there somewhere we can exploit

just give your opinion, you don't even have to say why, just tell me which you think would produce more energy

[the_big_m_in_ok]

mr_bojangles said:

the only correlation i can see is that the more mass, the more angular momentum which would achieve a flywheel type affect

just give your opinion, you don't even have to say why, just tell me which you think would produce more energy

Have a look at this:
http://www.animations.physics.unsw.edu.au/jw/electricmotors.html

Speed, according to the source above, is more of a factor.  Although, I think for a transformer, a high turns ratio secondary would also contribute more to BEMF.  A stronger magnet acting on a coil as well.  Or a coil with more turns.

--Lee