Abstract: A stator includes a stator core and a stator winding. The stator core has a plurality of winding slots formed at an end surface of the stator core in an axial direction of the stator core and arranged at intervals in a circumferential direction of the stator core, and each of the plurality of winding slots extends through an inner wall and an outer wall of the stator core. The stator winding includes at least one coil unit, and each of the at least coil unit includes a plurality of first conductors assembled together. Each of the plurality of first conductors includes at least one insertion portion inserted into a corresponding one of the plurality of winding slots. The coil unit is formed by assembling and connecting the plurality of first conductors.