To provide a power converter for driving a main electric motor which is constituted to enable a direct variable voltage variable frequency drive by separating a motor for an air-conditioned compressor occupying much of power consumption, from other loads of an auxiliary power supply, in the loads supplied power at a steady voltage and a steady frequency by the auxiliary power supply supplying power to the loads except the main electric motor.
This power converter 11 of an electric train driven by variable frequency variable voltage output to a running main electric motor mounted on cars of the electric train outputs power with a variable frequency variable voltage, through selectors 41, 51 for selecting either of the main electric motor and the air-conditioned compressor or the both in accordance with the running state of the cars.
HORIE SATORU
NAKADA KIYOSHI
