ELECTRIFICATION

CO2-driven global warming is showing no signs of abating. We think that the widespread adoption of hybrid electric vehicles (HEVs), plug-in hybrid vehicles (PHVs), and fuel-cell vehicles (FCVs), which produce lower CO2 emissions than conventional engines can help resolve this problem. The replacement of conventional engines with HEV, PHV, and FCV powertrains is called “electrification.” Important components in these systems include batteries, motors, and the power control unit (PCU) that controls these components.
With the aim of facilitating the development of the next generation of HEVs, PHVs, and FCs, we are researching new highly efficient high-output motors, highly efficient low-loss inverters and converters, and the power semiconductors at the heart of all these components.

High Reliability Technology in Power Devices

The influence of carbon in silicon crystals on device characteristics has been clarified, and it was found that controlling within the proper carbon concentration range leads to highly reliable power devices in Hybrid Vehicles.

High Reliability Technology in Power Devices

Ultrahigh-quality SiC Single Crystals

Ultrahigh-quality SiC single crystals have been realized by utilizing the effect of growth direction on defect reduction. Such crystals will promote the development of high-power SiC devices.
* The result was published in the journal "Nature", (Nature, Vol. 430, Iss. 7003, pp. 1009-1012 (2004))

Ultrahigh-quality SiC Single Crystals
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