Stator for electric rotary machine and electric rotary machine using it

Abstract

A rotary electric machine configured to draw three-phase output lines from a connecting-side coil end through a lightweight process is provided. A stator for a rotary electric machine according to the present invention includes a plurality of segment coils having connecting-side winding portions and non-connecting-side winding portions. The connecting-side winding portions are arranged on one side of a stator core and connected to slots with the same slot pitch, and the non-connecting-side winding portions are arranged on the other side of the stator core and inserted into the slots with multiple types of slot pitches. The connecting-side winding portions include a first connection group and a second connection group.The first connection group is provided with a plurality of terminal portions for connecting the segments, and the second connection group connects layers different from those in the first connection group and is provided with a plurality of terminal portions.

Claims

[1] Stator (230) for an electric rotary machine (200, 202), comprising: a plurality of segment coils (243, 248, 249) connected to one another and forming three-phase stator windings (238), comprising: connecting-side winding portions arranged on one side of a stator core (232) and connected to slots (237) having the same slot pitch; and Non-connection side winding sections arranged on the other side of the stator core (232) and inserted into the slots (237) with a plurality of slot pitches, wherein the connecting side winding sections comprise: a first connection group (246a) provided with a plurality of connection sections (244a, 245a) for connecting the segment coils (243, 248, 249), a second connection group (246b) connecting layers different from those in the first connection group (246a) and provided with a plurality of connection portions (244b, 245b), characterized in that the segment coils (243) in the stator core (232) form 2n layers, and for all integers 1 to n, the first connection group (246a) establishes connections between the terminal sections (244a, 245a) of segments of a 2n-1 layer and a 2n layer, and for all integers 1 to n-1, the second connection group (246b) establishes connections between the connection sections (244b, 245b) of segments of a 2n layer and a 2n+1 layer. [2] The stator (230) for an electric rotary machine (200, 202) according to claim 1, wherein the connection-side winding portions are circumferentially connected to the slots (237) having the same slot pitch in layers of the segment coils (243, 248, 249) in a radial direction of the stator core (232). [3] Stator (230) for an electric rotary machine (200, 202) according to claim 1 or 2, wherein the connection-side winding sections further comprise lead wires (247a, c, e, h, j, n) and neutral points (247b, d, f, g, i, k) of each phase, the neutral points (247b, d, f, g, i, k) being connected to each other, the plurality of connecting portions (244a, 245a) of the first connecting group (246a) are aligned in a radial direction, and the lead wires (247a, c, e, h, j, n), the neutral points (247b, d, f, g, i, k) and the plurality of terminal portions (244b, 245b) of the second connection group (246b) are arranged in a radial direction. [4] Stator (230) for an electric rotary machine (200, 202) according to claim 3, wherein the lead wires (247a, c, e, h, j, n) are arranged on one side of an outermost circumferential side or an innermost circumferential side in a radial direction, and the neutral points (247b, d, f, g, i, k) are arranged on a different side of the outermost circumferential side or the innermost circumferential side. [5] A stator for an electric rotary machine (200, 202) according to claim 4, wherein the lead wires (247a, c, e, h, j, n) and the neutral points (247b, d, f, g, i, k) on the outermost circumferential side or the innermost circumferential side are arranged alternately in a circumferential direction. [6] A stator for an electric rotary machine (200, 202) according to claim 5, comprising a plurality of pairs of lead wire (247a, c, e, h, j, n) and neutral point (247b, d, f, g, i, k) aligned in the circumferential direction, each pair of lead wire (247a, c, e, h, j, n) and neutral point (247b, d, f, g, i, k) enclosing one of the plurality of terminal portions (244a, 245a) of the first connection group (246a). [7] The stator for an electric rotating machine according to any one of claims 3 to 6, wherein the plurality of terminal portions (244a, 245a) of the first connection group (246a) and the lead wires (247a, c, e, h, j, n), the neutral points (247b, d, f, g, i, k) and the plurality of terminal portions (244b, 245b) of the second connection group (246b) are arranged alternately in the circumferential direction. [8] Electric rotary machine (200, 202) with the stator (230) for an electric rotary machine (200, 202) according to one of claims 1 to 7.

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