Magnifer & rotary problems

From:  Bill the arcstarter [SMTP:arcstarter-at-hotmail-dot-com]
Sent:  Wednesday, June 24, 1998 7:12 AM
To:  lod-at-pacbell-dot-net; tesla-at-pupman-dot-com
Subject:  Re: Magnifer & rotary problems

Greg wrote:

>> Why, then, do most use lexan or some other non-conductive plastic
>> for their rotors?  If metal is superior, and it doesn't compromise 
>> quenching, why use plastic?
>I think that it comes down to personal preference.  
>Metal rotors are stronger and have greater dimensional
>stability, but require the shaft bearings to be 
>insulated from ground.  I personally prefer to make
>the stationary bearing support blocks out of insulating
>material rather than the rotors themselves, since the
>rotors must survive far greater mechanical and thermal 
>stresses than the stationary framework.

Greg - 
 We are using a slightly different type of aluminum rotor.  This gap is 
composed of a non-insulated induction motor (non-sync) with a 4 inch 
plastic hub (don't know what material) mounted on the shaft.  Onto the 
plastic hub is mounted an aluminum ring, with an o.d. of about  14 
inches.  Stainless steel contact mounted near the edge provide the 
arcing path.

 The point here is that we insulated the disk from the motor via the 
plastic hub disk.

This is an alternate construction technique.

-Bill the arcstarter
Starting arcs in Cinci, OH

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