Start main contents

News

News Release Archives

Note that the releases are accurate at the time of publication but may be subject to change without notice.

FOR IMMEDIATE RELEASE No.2625

Mitsubishi Electric to Launch Next-generation SiC Inverter for Railcars

Silicon carbide power modules enable more compact, energy-efficient and quiet railcar systems

Tokyo, October 3, 2011 - Mitsubishi Electric Corporation (TOKYO: 6503) announced today that it will launch a next-generation traction inverter system incorporating large-capacity silicon carbide (SiC) power modules. Railcar systems fitted with the traction inverter will achieve 30% energy savings, require less maintenance and emit less noise than conventional silicon (Si) power modules. The first commercial application, following a series of ongoing field tests starting January 2012, is expected to be in railcars of Tokyo Metro Co., Ltd..
SiC inverter for railcars

SiC inverter for railcars

Compared to Si-based power modules used in current traction inverters, the newly developed SiC power module offers a number of important improvements. In addition to 30% reduced power loss in the traction inverter, inverter size and weight have been reduced by 40% each.


The new inverter system also enhances the performance of regenerative brakes, which will lead to producing more regenerative electricity. Incorporating two 1,700V and 1,200A SiC chips, the new inverter's high-frequency switching capability also achieves 40% less power loss in the motor. Furthermore, the new inverter emits up to 6dB less noise compared to conventional models.


Railways are garnering renewed attention as a means of reduced-carbon transportation. Continued improvements in railcar equipment performance, including Mitsubishi Electric's new inverter system, are expected to lower the environmental impact of railways even further.

Inquiry