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Mitsubishi Electric Installs Railcar Traction System with All-SiC Power Modules on Shinkansen Bullet Trains

First converter/inverter system with SiC modules installed to high-speed train reduces its size and weight

TOKYO, June 25, 2015- Mitsubishi Electric Corporation announced today that it has completed the installation of, and begun testing, railcar traction converter/inverter systems with all-silicon carbide (SiC) power modules on N700 Shinkansen bullet trains for Central Japan Railway Company (JR-Central). These are the first 3.3kV, 1500A traction systems to be installed on a high-speed train line, according to the company's own research.

Mitsubishi Electric has been working to downsize its traction system for Shinkansen bullet trains. The use of SiC power modules reduces the size and weight of its new converter/inverter system by approximately 55% and 35%, respectively, compared to existing systems. The weight of the traction motor, including this system, is reduced by approximately 15%.

The power modules were developed with support from the New Energy and Industrial Technology Development Organization of Japan.

Specifications of Main Circuit
Input voltage: 2,500V AC
Main circuit system: Large-capacity all-SiC power modules
Three-level PWM inverter with regenerative brakes
Control system: Four traction motors with 305kW, parallel control
Cooling system: Self-cooling
JR-Central N700 Shinkansen bullet train

JR-Central N700
Shinkansen bullet train

Traction system

Traction system