Rotary electric machine stator and rotary electric machine provided with same

Abstract

The present invention addresses the problem of providing a rotary electric machine stator and a rotary electric machine provided with the stator in which downsizing, a high output, and cost reductioncan be achieved with good balance at a high level, compared to the conventional technology. The rotary electric machine stator according to the present invention is formed by winding a stator coil around a stator core, and is characterized in that: in the stator coil, welded portions between segment conductors are each formed in the region of an end portion of the stator coil; the segment conductors each have, at a portion near the corresponding welded portion, a conductor wire exposed portion where an insulating coating provided on the outer circumference of the conductor wire has been removed; in each of the welded portions, the conductor wire exposed portion of at least one of paired segment conductors constituting the welded portion, includes a root section that is adjacent to the insulating coating along the longitudinal direction of the conductor wire, a transition section for radially offsetting the center axis of the conductor wire by a prescribed displacement amount, and a joined section that is radially offset from the root section by the prescribed displacement amount; press marks exist at the boundary between the root section and the transition section and at the boundary between the transition section and the joined section; and the prescribed displacement amount is 1+-0.4 times or 2+-0.4 times of the thickness of the insulating coating.

Description

technical field [0001] The present invention relates to technologies related to rotating electric machines, and in particular, to a stator that contributes to downsizing and higher output of a rotating electric machine, and a rotating electric machine including the same. Background technique [0002] As a type of rotating electric machine (for example, electric motor), there is a winding field type rotating electric machine. A wound field type rotating electrical machine is a mechanism in which stator coils are arranged in a plurality of stator slots formed in a stator core, and when a voltage is applied to the stator coils, a rotating magnetic field is generated, and the rotor rotates by the rotating magnetic field. [0003] In recent years, there has been a strong demand for downsizing (in particular, shortening of the length in the direction of the rotating shaft) of rotating electric machines, and the winding method of the stator coil has become complicated in order to m...

AI Technical Summary

Problems solved by technology

[0003] In recent years, the miniaturization of rotating electric machines (especially the shortening of the length in the direction of the rotating shaft) has been urgently required, and the winding method of the stator coil has become complicated in order to meet this demand.

In addition, in rotating electrical machines, there is a strong demand for cost reduction, but the manufacturing yield tends to decrease due to the complexity of the winding method of the stator coil, and the improvement of the manufacturability of the stator is a problem.

For example, in the process of welding the segment conductors at the end of the stator coil, the insulating film of the segment conductors may be thermally damaged. As a result, there is a problem that the electrical insulation between the segment conductors that should be electrically insulated decreases.

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