Keywords: high speed train, battery self-traction, lithium-ion battery, SiC device, compactness and weight reduction, traction system.

system for emergency such as power failures of the catenary. The system will be introduced in the new Shinkansen train “N700S,” which will enter the commercial service in 2020. The purpose is to enable the train to propel itself at the low speed when an earthquake strikes or other long-hour power supply failures occur. The system will also be utilized for shunting trains at the rolling stock depots in nightwork maintenance.

In this paper, we overview the downsizing and lightweight efforts of SiC-applied traction system that enable us to install the lithium-ion battery traction system. Then, we explain the concept and the basic structure of the system. Finally, the running test results by using the N700S Shinkansen prototype train for confirmation tests are reported. This lithium-ion battery application to the high-speed train’s traction system is the first case in the world.

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