How do I make three electromagnets rotate at a fixed speed?

[nishant]

I have decided to make an electromagnetic rail gun,in such a way that three of them are ligned with each other and connected centrally,my problem is that how do I make them rotate at a fixed speed.

 

[willib]

I have decided to make an electromagnetic rail gun,in such a way that three of them are ligned with each other and connected centrally,my problem is that how do I make them rotate at a fixed speed.

you are not being clear , at all , on what you are trying to do..
do youn mean that you want to connect three together ' gatling gun ' style?

 

[FredGarvin]

I would think you would need some kind of slip ring device that would allow the three to rotate while still having electrical connections in tact.