A stator assembly, comprising a stator core, a stator winding and a neutral connecting assembly, the stator core is provided with a plurality of stator slots, the plurality of stator slots are distributed along a circumferential direction of the stator core, each of the plurality of stator slots is provided with a plurality of slot layers, the plurality of slot layers are distributed along a radial direction of the stator core, and winding parts of two winding wires of each phase of the stator winding are arranged in the plurality of stator slots;
- leading-out ends of the two winding wires of each phase are located on a radial inner side of the winding part based on the stator core, the leading-out ends of the two winding wires of each phase are respectively led out from an innermost slot layer of the plurality of slot layers of two adjacent stator slots of the plurality of stator slots, a leading-out end of a first winding wire of each phase is uniformly distributed along the circumferential direction of the stator core, and a leading-out end of a second winding wire of each phase is uniformly distributed along the circumferential direction of the stator core;
- star point ends of the two winding wires of each phase are located on the radial inner side of the winding part based on the stator core, the star point ends of the two winding wires of each phase are respectively led out from a secondary innermost slot layer of the plurality of slot layers of two adjacent stator slots of the plurality of stator slots, a star point end of the first winding wire of each phase is uniformly distributed along the circumferential direction of the stator core, and a star point end of the second winding wire of each phase is uniformly distributed along the circumferential direction of the stator core;
- both the leading-out ends and the star point ends are led out towards an axial outer side of the stator core, in an axial projection of the stator core, a projection of the leading-out ends is located on a radial inner side of a projection of the star point ends based on the stator core;
- the neutral connecting assembly comprises a star point connecting plate and an arc-shaped connecting plate, and there are at least three star point connecting plates and at least three arc-shaped connecting plates, a welding flat plate is provided in a middle of the star point connecting plate, a first connecting end is provided on each of two sides of the welding flat plate, a second connecting end is provided at each of two ends of the arc-shaped connecting plate, the star point connecting plate and the arc-shaped connecting plate are connected in sequence at intervals, one first connecting end is welded with one second connecting end, the first connecting end and the second connecting end are located on an axial inner side of the star point ends based on the stator core, the welding flat plate is located between the leading-out ends and the star point ends, and the welding flat plate is connected to two star point ends of each phase.