Toray demonstrates 150°C heat-resistant capacitor for inverters

Toray Industries has successfully demonstrated the operation of an inverter equipped with a prototype film capacitor using its newly developed 150°C heat-resistant film as a dielectric. This development, conducted in collaboration with Professor Masayoshi Yamamoto of Nagoya University’s Institute for Advanced Materials and Systems, addresses a critical constraint in the design of high-output drive systems for next-generation mobility.

As electric vehicles, electric aircraft, and flying cars advance, the heat resistance of film capacitors used to stabilize power within inverters has become a limiting factor. Improving heat resistance is essential for reducing the size and weight of heat dissipation structures, which is vital for increasing the cruising range of flying cars. Through thermal simulations, Toray confirmed the potential to reduce the size of heat dissipation structures by approximately 50%.

The project was supported by the New Energy and Industrial Technology Development Organization (NEDO) under the 'Development of High Heat-Resistant Film for Film Capacitors for Next-Generation Mobility' program. Toray plans to exhibit these results at the NEDO booth during CEATEC 2026.