Stator assembling method and stator

Abstract

Provided is a stator assembling method of mounting, to an annular stator core, concentrically wound coils which are each formed by a conductive wire wound in multiple turns and which each include portions to be accommodated in slots and portions to constitute coil ends, the annular stator core including slots which are formed between adjoining teeth each extending radially inward from a back yoke and are formed such that the spacing of the slots increases toward the radially outward portion. The method includes a step for forming a coil assembly that includes multiple concentrically wound coils disposed annularly, and a step for pushing the coil assembly disposed in a space at the inner-diameter side of the stator core toward the outer-diameter side, and fitting the coil assembly into the slots of the stator core. The multiple concentrically wound coils each have vertices at the portions to constitute coil ends, the vertices being directed axially outward. The distance in the axial direction between the vertices of the portions to constitute coil ends at both sides in the axial direction of the multiple concentrically wound coils is set so as to become gradually shorter from the conductive wire mounted at the outer-diameter side of the stator core to the conductive wire mounted at the inner-diameter side of the stator core.

Description

technical field [0001] The present disclosure relates to stator assembly methods and stators. Background technique [0002] Conventionally, a stator assembly method is known in which a plurality of coils are mounted on a stator core having a plurality of slots each having an opening opening toward the inner periphery (for example, refer to Patent Document 1). Each coil described in this Patent Document 1 is formed by winding a winding wire made of flat wire a plurality of times. Each coil has a side portion inserted into the slot, and a coil end continuous to the side portion. In this stator assembly method, the above-mentioned coil is arranged in a space vacated in the center of the stator core before being attached to the stator core, and then, after the arrangement, the side parts are inserted into the slots of the stator core. Press in a radial manner from the inner diameter side to the outer diameter side. During this pressing, each coil deforms so that the space bet...

AI Technical Summary

Problems solved by technology

Therefore, if the coil shape before being mounted on the stator core is designed without considering the coil shape after being mounted on the stator core, even if the height of the coil end of each turn in the coil shape before mounting is designed to shorten the axial dimension There is also a problem that the apex of the coil on the inner diameter side is higher than the specified height after insertion.

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