Hitachi, Ltd.

Youichi Amako

Akira Nishimizu

Hideki Masuhara

Masanao Kuwabara

Takashi Shirone

Takahide Matsuo

Noriyuki Hayashi

A gas insulation transformer, in the tank of which transformer an apparatus including an iron core and a coil is received and a gas is filled as an insulating and cooling medium, is provided, wherein the iron core and coil are possessed with the loss characteristics equivalent to that of a high-efficient transformer and an inert gas, the global warming coefficient of which gas is rated 1 or below, is filled in the tank as an insulating and cooling medium.

Gas insulation transformer

To provide a technology capable of restraining direct current magnetic deviation in a transformer without providing a gap in a core, an axis of easy magnetization is provided in a second direction intersecting with a first direction along a magnetic circuit of the core to thereby bring a B-H characteristic of a material characteristic of the core into an unsaturated state.

Method of fabricating a core for a transformer

Transformer

Growing community of inventors

Niigata, Japan

Youichi Amako