Meidensha Corporation

Keiichi Kodachi

Yuka Yamamoto

Kuan Chung Tey

Shizunori Hamada

Kenji Kobori

Shota Urushibata

Takeshi Kondo

Isamu Hasegawa

Hiromi Sako

Takashi Kodama

A box-shaped inner case () is accommodated in a box-shaped outer case (), and refrigerant flow passages () are formed at five surfaces except an opening surface () by gaps between the inner and outer cases. A Gap of an opening edge of the outer case () and an opening edge of the inner case () is covered with a frame-shaped cover (). A coil () is placed in the inner case (), and the inner case () is filled with magnetic powder mixture resin so that the coil () except the terminals () is embedded. A core () is made of the magnetic powder mixture resin. Cooling water flows along a longitudinal direction of the outer case () with one of refrigerant pipe connecters () being a refrigerant inlet and the other of the refrigerant pipe connecters () being a refrigerant outlet.

Reactor

A box-shaped inner case () is accommodated in a box-shaped outer case (), and refrigerant flow passages () are formed at five surfaces except opening surfaces () by gaps between the inner and outer cases. A Gap of an opening edge of the outer case () and an opening edge of the inner case () is covered with a frame-shaped cover (), A capacitor element () formed from a film capacitor is placed in the inner case (), and the inner case () is filled with potting material () having thermal conductivity so that the capacitor element () except the terminals () is embedded. Cooling water flows along a longitudinal direction of the outer case () with one of refrigerant pipe connecters () being a refrigerant inlet and the other of the refrigerant pipe connecters () being a refrigerant outlet.

Capacitor

A multilevel power conversion device includes: N (N&#x2265;1) direct current voltage sources; a first flying capacitor; a second flying capacitor; and a phase module of a M phase (M&#x2265;2) being configured to output, from the output terminal, a potential of one of the input terminals, or a potential obtained by adding or subtracting the voltage of the capacitor to or from the potential of the one of the input terminals, by selectively controlling the respective switching elements in an ON/OFF manner.

Multilevel power conversion device with flying capacitor

Growing community of inventors

Numazu, Japan

Keiichi Kodachi