| 摘要 |
A thyristor rectifier 2 performs functions of powering and regenerating. A voltage ensuring rectifier 10, which is arranged parallel with the thyristor rectifier 2, outputs a direct-current voltage lower than that of the thyristor rectifier 2. Therefore, even when the output voltage of the thyristor rectifier 2 approaches zero, the voltage to the electric railcar 9 is ensured, and a stoppage of the electric railcar due to operation of an undervoltage relay is prevented. <IMAGE> |
