Its not that you would need to put in heaver lines for higher voltage but a close to 50% increase in voltage may make you replace all the insulators
<snip> that were rated for 600V with ones rates for 750V. Staff told me the lines themselves were old and needed replacing, notwithstanding any planned voltage increase.
I would expect the motors on the new cars would be based on AC motors
which is the predominant motor type in electric automobiles but with something as big as a train the rules for motor choice may be different.
With AC motors the control electronics would have to handle the voltage variations but its doable.
-- Alvin Starr || voice: (905)513-7688 Netvel Inc. || Cell: (416)806-0133 alvin@netvel.net ||