Stator assembly and motor

Abstract

The invention discloses a stator assembly and a motor. The stator assembly comprises an iron core and a stator winding, N strip-shaped grooves evenly distributed in the circumferential direction of the iron core are formed in the inner wall of the iron core, and each strip-shaped groove extends in the axial direction of the iron core. M layers of hierarchical spaces are arranged in each strip-shaped groove, the Mth layer of hierarchical spaces in the N strip-shaped grooves form an outer layer space, and the hierarchical spaces except the Mth layer of hierarchical spaces in the N strip-shaped grooves form an inner layer space. The stator winding comprises a plurality of sub-windings which are connected in parallel, and each sub-winding comprises at least two branch windings which are connected in parallel. Each branch winding comprises a plurality of coil units which are connected in series, the plurality of coil units comprise a short-distance hairpin coil, a whole-distance hairpin coil and a long-distance hairpin coil, the three hairpin coils are arranged in the outer layer space, and at least one of the three hairpin coils is arranged in the inner layer space. According to the stator assembly, busbar backflow is not needed, and the manufacturing difficulty and cost of the stator assembly can be reduced.

Description

technical field [0001] The invention relates to the technical field of driving devices, in particular to a stator assembly and a motor. Background technique [0002] The winding of the flat wire stator winding motor includes a plurality of hairpin coils, and the multiple hairpin coils are arranged in the slot structure of the stator. [0003] In the related art, there are many types of hairpin coils used in a single motor, and the layout of the hairpin coils is unreasonable, resulting in the need to use a large number of busbars to connect the branches or neutral points of each winding, resulting in the manufacturing process of the motor. Complexity, low manufacturing efficiency and high manufacturing cost. Contents of the invention [0004] The main purpose of the present invention is to provide a stator assembly, aiming at reducing the manufacturing cost of the motor and improving the manufacturing efficiency of the motor. [0005] In order to achieve the above purpose...

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Problems solved by technology

[0003] In the related art, there are many types of hairpin coils used in a single motor, and the layout of the hairpin coils is unreasonable, resulting in the need to use a large number of busbars to connect the branches or neutral points of each winding, resulting in the manufacturing process of the motor. Complexity, low manufacturing efficiency, high manufacturing cost

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