Daihen Corporation

Allied Corporation

Masatake Hirai

Katsumi Hanaoka

Yasuo Yamamoto

Nobuyuki Sumida

Masatake Kokado

Kenji Kawate

Kazuhiro Tanaka

Teruaki Tanaka

Masahiro Matsumoto

Koichi Akimoto

Toshio Fujiwara

Tadashi Kohketsu

Hiroshi Yamaguchi

Takeshi Uchikura

By Michiko Yamamoto, Heiress

Toshiko Yamada

Yasuo Yamamoto, Deceased

Masako Sakamoto, Heiress

Syoichi Shii

Kyoko Kan, Heiress

Tadanori Matsubayashi

A method for fabricating transformers each having a core made from a lamination body of strips made of an amorphous magnetic alloy comprises the steps of forming a ring-like lamination body using a grindstone cutter and a gas coolant to obtain a developed lamination body, shaping the developed lamination into a substantially rectangular core, assembling windings with the core using a sliding tool for inserting leg portions of the core into windows of windings, covering the core with a core cover and mounting a grounding member so as to ground the core to the ground.

Fabrication method for transformers with an amorphous core

A stationary induction electric apparatus and a method for manufacturing the apparatus is disclosed. The apparatus comprises a reinforcement frame to be mounted on an inner peripheral surface of a rectangular core, a protective cover for covering both of the rectangular core and the reinforcement frame, a reinforcement band to be wound on an outer peripheral surface of the rectangular core on which the protective cover is mounted, and windings to be fitted on the leg portion of the rectangular core on which the reinforcement frame, the protective cover, and the reinforcement band are mounted.

Stationary induction electric apparatus

A method for manufacturing rectangular wound cores including a step of forming at least one developed lamination body by cutting off at least one ring-like lamination body, a step for applying adhesive agent to one of cut ends of each developed lamination body, a step forming lamination blocks each of which is comprised of plural lamination units shifted in the length-wise direction by a predetermined distance and a step for jointing both ends of each of lamination unit in an overlapping state by winding each lamination block around a shaping bobbin.

Method of manufacturing wound transformer cores

A stationary induction electric apparatus and a method for manufacturing the apparatus. The apparatus comprises a reinforcement frame to be mounted on an inner peripheral surface of a rectangular core, a protective cover for covering both of the rectangular core and the reinforcement frame, a reinforcement band to be wound on an outer peripheral surface of the rectangular core on which the protective cover is mounted, and windings to be fitted on the leg portion of the rectangular core on which the reinforcement frame, the protective cover, and the reinforcement band are mounted.

Method of manufacturing a stationary induction electric apparatus

An annealing furnace for annealing magnetic cores therein. Each magnetic core is placed on a tray on which the core is transferred on rollers through the furnace along with a conductive magnetizing conductor or shaft positioned inside the core and a current source for supplying a current to the conductive magnetizing shaft. After the tray, core and current source pass through the furnace, the annealed core is removed from the tray, and the tray and current source are returned to the furnace entrance for reuse with another core.

Annealing furnace for annealing magnetic cores in a magnetic field

A transformer with a toroidal magnetic core. The toroidal magnetic core is housed in an insulating case. The insulating case has a top and bottom annular winding frames. These frames provide radial winding conductor grooves. The top annular winding frame provides a plurality of grooves for guiding an inter-connecting conductor therein each of which is formed between two adjacent winding conductor grooves. The inter-connecting conductor is guided through said guiding groove to connect between the adjacent two unit coils.

Transformer with toroidal magnetic core

Growing community of inventors

Osaka, Japan

Masatake Hirai