Denso Corporation

Makoto Takahashi

Masaru Sugiyama

Youichi Kamakura

Kazutaka Maeda

Nobuo Suko

Kazuki Maesoba

Yukinori Sawada

Masayuki Asai

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 method for manufacturing a stator of a rotary electric machine includes: a step of forming a plurality of conductor segments each having at least a straight leg; a step of inserting the plurality of conductor segments into each of the slots in a plurality of radially aligned layers so that the straight legs can extend outside an end of the stator core; a step of stratifying the straight legs in radially aligned layers to correspond to the layers in the slots; a step of holding each of the stratified portions at grip portions; a step of circumferentially shifting each of the grip portions in a prescribed circumferential direction of the stator core; and a step of axially shifting each of the grip portions separately from another in an axial direction of the stator core to locate those of the grip portions to be connected adjacent to each other.

Method and apparatus for manufacturing stator of rotary electric machine

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

In a twisting formation method having an inside jig provided in a ring shape with inside holding portions for folding one of the straight portions of a near letter U shaped wire and an outside jig provided in a shape of ring concentric with that of the inside holding portions with outside holding portions for folding the other of the straight portions, the connecting portion of the near letter U shaped wire being formed in a twisted shape by rotating relatively the inside and outside jigs, the method includes urging leading ends of the straight portions and the connecting portion in a contracting direction.

Method of manufacturing a stator

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

Okazaki, Japan

Makoto Takahashi