Unequal-width slot stator assembly and motor

Abstract

The invention relates to the technical field of motors, in particular to an unequal-width slot stator assembly and a motor. Each stator slot is divided into N rectangular slots along the radial direction of the stator core, the widths of the N rectangular slots are sequentially reduced from the outer side of the stator core to the inner side of the stator core, the cross section of each stator slot is in a symmetrical N-layer step shape, N is greater than or equal to 2 and less than or equal to 4, and N is an integer. The two wires which are sequentially arranged in the circumferential direction of the stator iron core are arranged in the rectangular groove closest to the outer side of the stator iron core, the length-width ratio of the wires on the outermost layer is effectively reduced, the wire forming difficulty is lowered, the turning radius needed by wire twisting is reduced, and the space utilization rate of the end winding is improved. And under the condition that the number of the stator slots of the stator assembly and the number of wires in each slot are relatively small, the stator slots are divided into three rectangular slots, so that the process difficulty and the economic cost of production and manufacturing can be effectively reduced while the slot utilization rate is improved.

Description

technical field [0001] The invention belongs to the technical field of electric motors, and in particular relates to an unequal-width slot stator assembly and a motor. Background technique [0002] In order to improve the slot full rate of the motor, more and more motor solutions choose square wires as motor wires or flat wire motor solutions. In order to further improve the space utilization rate of the motor, an unequal slot width design is proposed. However, in the existing unequal slot width design solutions, there is a feature that the wires of the outer circular slot form an excessively large width-to-narrow ratio. Wires with large width and narrow ratios are difficult to form, and due to the large turning radius required for wire twisting, the size of the winding end is too large and the advantage of space utilization is lost. [0003] Especially when the width of the outer groove and the inner groove are quite different, it will be more difficult to design the wind...

AI Technical Summary

Problems solved by technology

However, in the existing design schemes of unequal slot widths, there is a feature that the wires of the outer circular slot form an excessively large width-to-narrow ratio

It is difficult to form the wire with a large width-to-narrow ratio, and because the turning radius required for the wire to be twisted is large, the size of the end of the winding is too large and the advantage of space utilization is lost

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