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[quote]QUOTE: Originally posted by oltmannd When starting a train, you want lots of pulling force. Pulling force is proportional to the current flowing thru the traction motors. If each motor can take 900 Amps and I put them all in parallel, I'd need a main gen that can do 5400 Amps! Meltdown city! If I put them all in series, I only need 900 Amps, but I'd need to do it a6 times the voltage of having them all in parallel As a traction motor turns, it create "back EMF" or a voltage that opposes the voltage imposed on it. The faster it turns, the higher this back voltage gets. In order to keep the motors taking the same HP, I need to raise the voltage on them higher than the back EMF. Lets say, at 60 mph I need 900 VDC at full throttle. If I arrange my 6 traction motors in parallel, I'd need a generator that can do 6000 Volts. Flashover City! If I arrange them in parallel, I only need 900 volts (but 6 times the current).[/quote] Please clarify the bolded section, in parallel, they would need 6000volts, but in parallel, you'd need 900 volts but 6 times the current?
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