Talk:GE AC4400CW
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The list of owners needs the addition of the Quebec, North Shore and Labrador, who now have 12, numbered 415 to 426. Qualicum
Done --DP67 (talk/contribs) 13:10, 17 December 2007 (UTC)
[edit] AC Lightning bolt
I've seen quite a few AC's with lightening bolts painted on them. I was just wondering if this was a common enough trait among all operators or just CSX, NS, and Conrail. MY reason for asking is that I had thought of adding it to the article as a common spotting mark if it is indeed common.
[edit] AC/DC=AC?
Just curious.. I've never quite figured this out. Alternators produce AC from the start (that's how they got their name). To get DC from an alternator you have to rectify it. On AC loco's they all rectify the AC to DC and then invert the DC back to AC. Yet they say it's more officiant.. Does anyone know why they convert then reconvert back again?
I'm not an expert on this, but I think it is desirable to power AC motors from a DC source due to the use of digitally controlled inverters. Being a DC source, there's no fixed source frequency to contend with; the inverter's output frequency is variable depending on the speed and torque the motor needs to produce. As for the prime movers spinning up AC vs. DC power, that depends on factors such as commutator maintenance and energy (heat) loss of more silicon for rectifiers. n2xjk (talk) 16:44, 17 December 2007 (UTC)
