Do you know how they feed a 1MW from the battery to the (AC?) motor ?
DO they have a stand alone inverter ? AND a step-up transformer ?
DO they have a stand alone inverter ? AND a step-up transformer ?
The train has to have an inverter anyways to vary its rpm, and I assume that the motor runs on less than 15 kV anyways. So it could conceivably be done without a separate DC-DC step-up converter, but I wouldn't know for sure.