What are these brushes or rings in AC generator for?

[QueenZ]

Hello, I am wondering what do these brushes/rings do in an AC generator? what is their purpose? I'm a newbie..

 

[telectrix]

how else would you get the electric current out?

 

[snowhead]

how else would you get the electric current out?

Electrickery?


.

 

[Kenny.]

Induction

 

[QueenZ]

Why they are not here???

 

[QueenZ]

LIke this....

 

[Knobhead]

Read the article / book you got the image from.

How old are you?

 

[QueenZ]

Tony, did you see the other pics I posted? why are they not required in the others but sometimes I see them... what's the difference?

 

[Kenny.]

I Think its because in the 1st drawing the magnetic source is stationaryand the coil is moving hence brushes
2nd the coil is stationary so no brushes

 

[supasparxs]

basically the red and blue cables are rotating. these are connected to the slip rings which are also rotating.
the cable taking the elec-trickery away from the generator does not move.
the brushes simply transfers the power from a moving slip ring to a stationary brush.

 

[QueenZ]

Oh.... silly me.... That makes sense, THANK YOU guys so much!! Sorry.. that was a stupid question.... :aureola:

 

[Knobhead]

Again, how old are you?

 

[QueenZ]

Again, how old are you?

not very old... or smart.... sorry...

 

[aoodtech]

the brushes and rings are used to transfer current,it is how a slip ring/carbon brush works.

 

[Lucien Nunes]

The hamster has to remain stationary while the wheel rotates. Forcing the hamster to rotate while the wheel remains stationary results in a dizzy hamster that spends half its time going backwards, hence an inefficient machine.

Sorry, er, yes, where were we...?

The output winding of an AC generator can be moving or stationary, both types have been used. If it is stationary (as in all large generators), no brushes are needed to get the current out of it, but the field system must be attached to the rotor. If the field happens to be an energised winding rather than a permanent magnet, then current must be got into it somehow, and traditionally that still involved brushes and sliprings. However by adding a rectifier to the field winding, it can be energised from another stationary winding, thus forming a brushless generator.

 

[Darkwood]

This thread at 2yrs old I think or certainly hope the OP is a little older and wiser...

 

[Lucien Nunes]

Ah yes, well spotted, I didn't notice the history of the previous poster who revived it either