Re: (erielack) Re: Transition

["Joe K." <joesk_@_ix.netcom.com>]

At 09:39 PM 3/31/2007, you wrote:

>"Transition" - at a high level - is when a diesel-electric's 
>electrical system is changed from a parallel to series (and 
>backwards) system. I can't remember what the initial state is, but 
>the traction motor can be wired in parallel (output from generator 
>is fanned out to each traction motor) or in series (output of 
>generator goes to one traction motor, which then outputs the next 
>traction motor, and so on)
>
>      - Paul

I do believe this is not entirely correct (but I could be wrong). 
Transition refers to the change in electrical characteristics of the 
individual traction motors by operating the individual motors either 
as series motors where the armature is in series with the field, or 
as parallel where the armature is in parallel with the field. A 
series wound motor produces very high starting torque and is the way 
they're operated when starting to move and then they're changed to 
parallel operation when under way. I don't believe that the motors 
themselves are connected in series with the generator, but as I've 
said, I could be wrong on that.

Joe K.



	The Erie Lackawanna Mailing List
	Sponsored by the ELH&TS
	http://www.elhts.org
	To Unsubscribe: http://lists.elhts.org/erielackunsub.html

------------------------------