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Apr 30th, 2014
Mitsubishi Electric to supply railcar traction inverter with all-siC power module to Odakyu Electric Railway
Mitsubishi Electric Corporation announced that it has received an order for its railcar traction inverter with all-silicon carbide (SiC) power modules made with SiC transistors and SiC diodes, which was placed by Odakyu Electric Railway Co., Ltd.
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This is the world's first order for the 3.3kV, 1,500A traction inverter designed for 1,500V DC catenaries.
The inverters will be installed in a 1000 series urban train comprising four cars in December 2014, following the completion of running tests.
Compared to an existing 1000 series train, energy savings in the new traction inverter-installed 1000 series train's main circuit, which also comprises high-efficiency main motors and filter reactor, are expected to reach approximately 36% when the train is very crowded or 20% at normal occupancy.
Also, the main circuit of the new traction inverter-installed 1000 series train will achieve 80% reductions in both size and weight thanks to fewer components in the all-SiC power modules, leading to drastic reductions in car-remodeling costs.
Specifications of Main Circuit

Input voltage:    1,500V DC
Main circuit system:    Two-level PWM inverter with regenerative brakes
Control system:    Four traction motors with 190kW, parallel control
Cooling system:    Self cooling

Odakyu 1000 series train

Railcar traction inverter with all-SiC power modules


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