Power Supply Device For Railroad Vehicle

Abstract: This power supply device (5) for a railroad vehicle is mounted onto a railroad vehicle (110) comprising a storage battery (9) and comprises a chopper circuit (21) disposed on the primary side of a transformer (28), a first inverter (24) disposed between the chopper circuit (21) and the transformer (28), a resonance circuit (25) disposed between the first inverter (24) and the transformer (28), and a second inverter (26) disposed between the transformer (28) and a direct current load (6). The chopper circuit (21) performs a step-down operation during a sound travel and performs a step-up operation during an emergency travel. The first inverter (24) converts a direct current voltage applied by the chopper circuit (21) into an alternating current voltage, and converts an alternating current voltage applied from the primary side of the transformer (28) into a direct current voltage. The second inverter (26) converts an alternating current voltage applied from the secondary side of the transformer (28) into a direct current voltage, and converts a direct current voltage applied by the storage battery (9) into an alternating current voltage.

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