Amps output from a Japanese bullet train....

• 08-21-2013, 06:05 PM
chea_shay2002
Amps output from a Japanese bullet train....
Hello, I need some help with figuring out how many amps that a Japanese bullet train outputs?
A standard Shinkansen (bullet train) uses 25,000 V AC overhead power supply and 1,500 V from a direct current. Is there a way to use these numbers to figure out how many amps it outputs?
• 08-22-2013, 05:12 AM
Cake of Doom
You can if you can find out the consumption in watts or the resistance in ohms.
For DC:-
Amp = watt/volt
or
Amp = volt/ohm

for AC it's a bit more long winded depending on the phase; plus it's been a while since I've had to think about this... I can remember how to find the wattage for single and 3 phase but for that you need the volts and amps. With any luck someone else with a better answer will turn up or you could try Professor Google.

Good luck and welcome to the forum.
• 08-23-2013, 09:02 PM
chea_shay2002
thanks for your insights Cake of Doom. I got an answer. "28.75 amps per 600-volt motor" and was able to get a rough estimate based on the number of motor cars each Shinkasen has.