Hi Bill,
I'm assuming the power must be DC... or otherwise wouldn't the coils get V hot?
Or is this what the transformer you mentioned deals with?
MW
On 21 Feb 2014, at 17:53, Bill Dube wrote:
> Electric coal mining equipment is cord-connected. Even enormous draglines
> ("steam" shovels on steroids) are typically cord connected with 13 kV cables.
> It is a mature science. Coal mining equipment has been electric powered since
> the early 1900's. Specialized cables, reels, transformers, and equipment for
> the mining industry. Easily transferable technology to agriculture.
>
> They typically put a reel on the back of the mining machine that pays out (or
> pulls in) the cable as needed. They have a "load center" transformer that is
> moved around as the mining process proceeds.
>
> Electric shuttle car for underground coal transport from working face:
> http://www.undergroundcoal.com.au/fundamentals/11_face.aspx
>
> Nifty tutorial on cables for mining EVs:
> http://www.cdc.gov/niosh/mining/content/deratingfactors.html
>
> Dragline cable:
> http://www.miningphoto.com/details/2140/dragline_working_in_background_removing_overburden_with_drill_rigs_drilling_blas
>
> Bill Dube'
> (Used to work as an Electrical Inspection intern for the Mine Safety and
> Health Administration, MSHA)
_______________________________________________
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
http://lists.evdl.org/listinfo.cgi/ev-evdl.org
For EV drag racing discussion, please use NEDRA
(http://groups.yahoo.com/group/NEDRA)
