Mitsubishi Electric Corporation

Akira Hatai

Shizuri Tamura

Yoshitomo Hayashi

Yasuhiro Sekimoto

Yuji Nojiri

Mitsuhiko Kanda

A transistor chip formed from a wide band gap semiconductor, on which transistor elements for an upper arm are formed is mounted on a front surface of an insulating substrate. A transistor chip formed from a wide band gap semiconductor, on which transistor elements for a lower arm are formed is mounted on a rear surface of the insulating substrate.

Power semiconductor module

A CR snubber circuit capable of increasing a reduction effect of the effective inductance component and suppressing a ringing component generated at the time of switching the switching element is obtained. A first current path formed on one surface of the substrate and a second current path formed on the other surface, which is the opposite side of the one surface of the substrate, are opposed to each other with the substrate being sandwiched therebetween, and the capacitorand the resistorare arranged such that current flows in opposite directions in the first current path and the second current path, and a band elimination filter is formed by the capacitor, the resistor, and an effective inductance component obtained by coupling an inductance component included in the first current path and an inductance component included in the second current path.

CR snubber circuit

In a power conversion apparatus including a rectifying module mounted with a power conversion device, an inverter module, and a direct-current reactor, a rectifying module and an inverter moduleB are mounted on a base section of a cooling fin, a direct-current reactor (DCL) is arranged in a lower layer of a vane section attached to the lower surface of the base section of the cooling finA, an air gap section is provided in the cooling finA, and a terminal block for obtaining electrical connection between the rectifying module and the inverter module and the direct-current reactor (DCL) is arranged making use of a space of the air gap section.

Growing community of inventors

Chiyoda-ku, Japan

Akira Hatai