Drive device for railway vehicle
AssigneeMitsubishi Electric Corporation
InventorTakuya SUGIYAMA
Life of this patent
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Abstract
A drive device for a railway vehicle operates by receiving power supply from an alternating-current overhead contact line or a three-phase generator. The drive device for a railway vehicle is configured such that a voltage output from a main transformer is applied to alternating-current input ends in a converter circuit via a first switch. A first phase voltage among voltages output from the three-phase generator is applied to an alternating-current input end in a first leg of a brake chopper circuit via a second switch. Second and third phase voltages among the voltages output from the three-phase generator are applied to the alternating-current input ends, respectively, via the second switch.
Claims7
A drive device for a railway vehicle that operates by receiving power supply from a single-phase power supply or a three-phase power supply, the drive device comprising:
- a converter circuit including a plurality of switching elements connected in a full bridge, and first and second alternating-current input ends, the converter circuit to convert alternating-current power supplied from the single-phase power supply or the three-phase power supply into direct-current power;
- an inverter circuit including a plurality of switching elements connected in a three-phase bridge, the inverter circuit to convert the direct-current power supplied from the converter circuit into alternating-current power and to supply the alternating-current power obtained by conversion to a drive motor;
- a brake chopper circuit including at least two legs in each of which a first switching element located on a high-potential side and a semiconductor element located on a low-potential side are connected in series, the two legs including a first leg in which a connection point between the first switching element and the semiconductor element forms a third alternating-current input end, the brake chopper circuit being connected in parallel to the converter circuit;
- and
- a power consumption circuit including a resistor connected in parallel to both ends of the semiconductor element, the power consumption circuit to consume surplus power of regenerative power generated when the drive motor operates as a generator by the resistor, wherein
- a voltage output from the single-phase power supply is applied to the first and second alternating-current input ends via a first switch, a first phase voltage among voltages output from the three-phase power supply is applied to the third alternating-current input end via a second switch, and second and third phase voltages among the voltages output from the three-phase power supply are applied to the first and second alternating-current input ends, respectively, via the second switch.
Dependencies are inferred from the claim text.