TH58429A - Methods for manufacturing stator coils of rotary electric machines. - Google Patents

Abstract

DC60 (22/01/46) The stator winding of a rotating electrical machine, such as an alternator for use in automobiles, is composed of several U-shaped conductive segments inserted into the forming sections of the stator core. Each segment has one head and two legs protruding from the head. Several segments include ordinary segments, each with an ordinary distance between two legs (ordinary slot pitch), and specialized segments, each with an ordinary distance between two legs (ordinary slot pitch), and specialized segments, each with a specialized slot pitch different from the ordinary slot pitch. The heads of the ordinary and specialized segments are twisted together to form the desired slot pitch, respectively, after the initial twisting is done on the specialized segments. In this case, the stator winding fabrication process is simplified. The stator winding of a rotating electrical machine, such as an alternator for use in automobiles... A car is constructed from a number of U-shaped conductor segments inserted into the forming sections of the stator core. Each segment has one head and two legs protruding from the head. Several segments exist, including ordinary segments, each with an ordinary distance between its two legs (ordinary channel pitch), and specialized segments, each with an ordinary channel pitch different from the ordinary channel pitch. The heads of the ordinary and specialized segments are twisted simultaneously to form the desired channel pitch, respectively. After the initial twisting is applied to the specialized segments, the stator winding fabrication process is simplified.

Claims (2)

1. Method for Fabricating Stator Windings of Rotary Electric Machines: The assembly method involves several steps. These include forming a number of U-shaped conductor segments, each with a head and a pair of legs connected to the head and extending parallel to each other. A machine is prepared for winding the heads of the U-shaped conductor segments. This machine has an outer ring and an inner ring. Both rings are connected coaxially to allow for relative rotation between them. At this point, both rings include several holes or grooves for inserting the legs of the U-shaped conductor segments. These holes or grooves are arranged along the ring lines with equal pitch between them. One leg of a pair of U-shaped conductor segment legs is inserted into the hole or groove of the outer ring, and another leg into the hole or groove of the inner ring. All the legs of the U-shaped conductor segments to form the stator windings are inserted in the same manner, and a relative rotation is achieved between the outer and inner rings at a predetermined angle. Therefore, all the heads are wound simultaneously so that each pair of legs is positioned at a predetermined first segment pitch distance from each other. A number of U-shaped conducting segments are constructed, consisting of one group of ordinary segments and one group of specialized segments. One leg of the pair of legs of the ordinary segment is inserted into the hole or groove of the outer ring, and one leg is inserted into the hole or groove of the inner ring, facing the hole or groove of the outer ring. Meanwhile, one leg of the pair of legs of the specialized segment is inserted into the hole or groove of the outer ring, and another leg is inserted into the hole or groove of the inner ring, which is shifted from the hole or groove of the outer ring by a predetermined second segment pitch, and the head of each specialized segment is initially twisted by a predetermined second segment pitch before the legs of the specialized segments are inserted into the holes or grooves of the outer and inner rings. 2. The method of fabricating the stator windings as described in Reputation 1, whereby the head of each specific segment is initially twisted in a procedure of inserting one leg of the specific segment into a hole or groove of the outer ring and another leg into a hole or groove of the inner ring facing the hole or groove of the outer ring, and causing a relative rotation between the outer and inner rings of a predetermined second slot pitch, thus positioning one leg away from another leg of a predetermined second slot pitch.