Denso Corporation

Kazutaka Maeda

Masaru Sugiyama

Youichi Kamakura

Makoto Takahashi

Kazuki Maesoba

Yoshio Naka

Nobuo Suko

Masahiro Asano

Takashi Tokizawa

Mitsuru Kato

Mamoru Urushizaki

Katsumi Nagasaka

Mitsuaki Taira

Toshihiko Fujimoto

Satoru Nejigane

Kimihiro Kuno

Katsuyoshi Shiraishi

Katsumi Matsumoto

An apparatus for shaping coil ends of a generator's stator having a plurality of sets of U-shaped large and small conductor segments. The apparatus includes four twister cylinders holding connection ends of the large and small conductor segments in four radial layers at an axial end of the stator, a rotating mechanism rotating the twister cylinders alternately in opposite directions, an elevating mechanism moving the twister cylinders in the axial direction of the stator, and a controller synchronously controlling the rotating mechanism and elevating mechanism.

Apparatus for manufacturing rotary-electric-machine stator

A stator core has a plurality of slots. Insulating members are formed into a cylindrical shape and are inserted into the slots. Axial ends of the insulating members are expanded respectively and deformation marks thinner than the other portion are formed respectively. Then, the insulating members are moved toward the expanded ends to position the deformation marks in the out of the slots. After that, the conductors are inserted into the slots from the expanded side of the insulating members. Therefore, insulation failure at the portions of the deformation marks is prevented.

Stator of rotary electric machine and method for making the same

In a method of manufacturing a stator of a vehicle AC generator, U-shaped conductor segments having a turn portion and a pair of forked in-slot portions are formed so that the radial width of each conductor segment can be larger than the radial depth of each slot of a stator core. The in-slot portions of the conductor segments are compressed from radially outside and inserted into each slot in an axial direction of the stator core so that the conductor segments can provide a spring-back force in the slots. Then, the U-shaped conductor segments are welded at ends of the in-slot portions in a prescribed pattern.

Method of manufacturing a vehicle AC generator

The object of the present invention is to provide a method and an apparatus for manufacturing a stator to improve accuracy in inserting conductor segments ( ) into slots ( ). The apparatus according to the present invention comprises a conductor holder ( ) holding the conductor segments ( ) and an axial-moving-mechanisms ( ) moving the conductor holder ( ) relative to a stator core ( ) in an axial direction. The conductor holder ( ) holds straight portions ( ) of the conductor segments ( ) to be inserted into the slots ( ) from one end of the stator core ( ).

Method and apparatus for manufacturing AC-generator's stator for vehicle

A method of welding a plurality of connection ends of a plurality of copper segments forming a circumferentially disposed stator winding of a rotary electric machine. The method includes a step of inserting a protection member between connection ends of adjacent two of the plurality of copper segments, a step of activating a welder tool, and a step of circumferentially moving the welder tool relative to the connection ends.

Method and apparatus for welding a plurality of windings of rotary electric machine

An apparatus for forming a spirally wound stator core includes a pair of forming rollers having a wedge-shaped gap therebetween, a winding drum, a drum-drive motor, and a roller presser. A strip of magnetic material is inserted into the wedge-shaped gap to be pressed at a controlled pressure so that the strip is bent into a spiral with one side of the strip being radially inside. The controlled pressure is changed automatically according to a memorized relationship between the rotation speeds of the pair of forming rollers and suitable pressures applied to the strip.

Apparatus and method for forming spirally wound stator core or rotary electric machine

The object of the present invention is to provide a method and an apparatus for manufacturing a stator to improve accuracy in inserting conductor segments (,) into slots (,). The apparatus according to the present invention comprises a conductor holder (,) holding the conductor segments (,) and an axial-moving-mechanisms (,) moving the conductor holder (,) relative to a stator core (,) in an axial direction. The conductor holder (,) holds straight portions (,) of the conductor segments (,) to be inserted into the slots (,) from one end of the stator core (,).

In a stator of a vehicle AC generator, each of stator slots has a circumferential parallel walls and a radial wall opposite a slot-opening. A stator winding has a plurality of radially aligned in-slot portions fitted in each of the slots at the circumferential sides thereof to form a central gap at the radially central portion of the in-slot portions. The central gap provides each of the in-slot portions with spring-back force against the slot-opening. Thus, slot-openings are hermetically closed, and the teeth are prevented from being vibrated by stator winding.

Growing community of inventors

Toyota, Japan

Kazutaka Maeda