Hitachi, Ltd.

Hitachi Koki Co., Ltd.

Shinichi Tsuyuki

Shinichi Sakamoto

Takayuki Watanabe

Yukinori Taneda

Shun Suzuki

Takeshi Kawana

Kazuo Kimura

Takao Mifune

Masanori Yoshizaki

Hiromasa Okayasu

Yoshio Hashimoto

A method of and apparatus for inserting coils into slots formed in the stator core of a dynamoelectric machine such as an electric motor, with the stator core having open type slots each of which cooperates with blades of the apparatus for guiding the coil and a stripper for forcing the coil out of the blades. A closed space has a volume sufficient to avoid any disorder of coil wire layers when the coil is received by the closed space. After placing the coils in the closed spaces, the coils are pushed into the respective slots and, as desired, the coils are further compressed until the coil wires assume a non-circular cross-section. By so doing, it is possible to remarkably increase the space factor of each slot.

Apparatus for inserting coils into stator core slots

An electric wire is wound as coil turns in slots in electric rotating machinery component such as a stator or an armature. The wire as it is supplied from a nozzle or flyer is guided by movable formers into successive layers of coil turns in the slots without forming an unwanted dead space in the slots. The formers are moved in radial increments to provide successive spaces in the slots for allowing the successive coil turn layers to be neatly laid in the spaces.

Apparatus for winding coils in electric machinery

Growing community of inventors

Yokohama, Japan

Shinichi Tsuyuki