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| Re: GM10B (Re: Early Conrail) (678670) | |||
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Re: GM10B (Re: Early Conrail) |
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Posted by WillD on Tue Sep 9 00:37:57 2008, in response to Re: GM10B (Re: Early Conrail), posted by Bill West on Mon Sep 8 06:10:50 2008. Wow, thanks for that. I really need to stop pretending I know what is going on inside an electric motor, or at least check out those books you recommended. Those links unfortunately betray my late night, dead tired posting habits and were just lazy research tacked on to the end to explain my though processes. For now I'll stick to the "there are components, here's a flowchart, it works on PFM" theory of electronic traction systems for locomotives. Thanks for the precise explanation of what exactly sets an induction motor apart from a synchronous motor. For some reason because they're commonly called asynchronous motors I always thought the two were related in some way.All the Class I RR interest in electrification in the early 70’s was driven by oil prices. No long term noble, save the earth goal, BN’s fuel bill was a million dollars a day. I don't really care if they want to do it to more effectively zap squirrels that would otherwise get into covered hoppers and eat the grain, so long as they string some wire and use it. Of course as soon as oil prices dropped in the 1980s those electrification schemes evaporated. PS Trains, Penn Central would not have had a future need for 50kv but it would have been nothing for ASEA to adjust the little bit of high voltage switchgear and design the transformer input winding for 50kv if any other customer had a use for it. I suspect that if that Wikipedia entry is correct about 50kv, it should be 60hz not 25hz. That's definitely correct, I know of no low frequency 50kv installation. However, the Black Mesa and Lake Powell and BC Rail's Tumbler Ridge branch both used a 50kv 60hz power supply. I know from mid-1970s Railway Age magazines (which proclaimed nationwide electrification "right around the corner") BN and UP were looking at 50kv systems, likely quite similar in structure to what the BM&LP and BC Rail finally installed. |
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