| 摘要 |
PROBLEM TO BE SOLVED: To keep the electric-car line side input voltage of a power converting means equal to or higher than a lower limit set voltage which ensures braking force. SOLUTION: In an electric rolling stock, there are provided a lower-limit voltage setting means 11 for setting an electric-car line 3 side lower limit set voltage of the power converting means 1 at which prescribed braking force is ensured, and a switching control means 12 which connects a resistor 9 in series between a power converting means 2 and the electric-car line 3 by a switching means 7, when the voltage of the electric-car line 3 detected by a voltage-detecting means 10 is lower than the lower limit set voltage.
|
