Armature coil of rotating electric machine

Abstract

A 3-phase 2-layer armature winding of a rotating electrical machine includes upper coil pieces (15a, 15b) and lower coil pieces (16a, 16b) housed in two layers in a plurality of slots (13) provided in a armature core (12), the upper coil pieces (15a, 15b) and lower coil pieces (16a, 16b) being sequentially connected in series at a connection side coil end (19a) and a counter-connection side coil end (19b), forming one and the same phase, each phase belt of the winding having n-th parallel circuits (n is an integer larger than 1), and an output terminal lead-out connection conductor (21) connected to an output terminal (22) and a neutral terminal lead-out connection conductor (21) connected to a neutral terminal (23) being connected to the coil pieces at the connection side coil end (19a) of the each phase belt, wherein the lead-out connection conductor (21) connected to the output terminal (22) is connected to a coil piece positioned at least farther than a first coil piece inside the phase belt counted from the end of the each phase belt, and a coil piece positioned at the end of the phase belt is connected to a coil piece positioned at least farther than the n-th (n is an integer larger than 1) inside the phase belt counted from the other end of the phase belt in the same parallel circuit, by a jumper wire (20a, 20b, 20c or 20d).

Description

technical field [0001] The present invention relates to an armature winding of a rotating electrical machine capable of reducing the potential difference between adjacent coil pieces and suppressing the occurrence of corona discharge. Background technique [0002] As an armature winding of a conventional rotating electrical machine, there is a Figure 33 An armature winding of the construction shown. [0003] Figure 33 It is a sectional view showing an example of an armature winding disposed in a slot of an armature core of a rotating electric machine. [0004] exist Figure 33 Among them, 12 is an armature core formed by laminating laminated iron plates, and an armature winding 14 is housed in a slot 13 provided in the peripheral portion of the armature core 12 . [0005] The armature winding 14 is arranged in two layers of an upper coil piece 15 on the side closer to the slot opening and a lower coil piece 16 on the bottom side of the slot, and its outer periphery is cov...

AI Technical Summary

Problems solved by technology

[0063] In addition, although it is considered that the coils are designed to be larger in order to increase the distance between the coil pieces at the ends of the coils, it leads to the need to increase the size of the rotating electrical machine, and it is difficult to transport due to the need to use too much material or increase the weight. or limited by settings

In addition, although the method of deforming the coil end after assembly to increase the coil pitch distance is also considered as a countermeasure, it becomes a problem related to the reliability of the rotating electrical machine, such as insulation damage or unbalanced electromagnetic force when the coil is deformed.

[0064] In order to increase the capacity of rotating electrical machines, it is necessary to increase the line current or terminal voltage, but for line current, it is necessary to increase the terminal voltage due to the temperature rise of the coil conductor or the limitation of size and weight.

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