Stator winding, stator and motor

The utility model provides a stator winding, a stator and a motor, the number of slots in each phase of each pole is 2, any phase winding comprises N parallel branches, each branch comprises at least one winding unit, a plurality of winding units are connected in sequence, and N is a multiple of 3; each winding unit comprises at least one coil unit I and a plurality of coil units II, the plurality of coil units I and the plurality of coil units II are sequentially arranged in the circumferential direction of the stator iron core, the plurality of coil units I and the plurality of coil units II are sequentially arranged in the radial direction of the stator iron core, and the number of the coil units I is an odd number; the first coil units and/or the second coil units located on the radial innermost layer and the radial outermost layer of the stator core are arranged on the same layer. Each branch circuit of each phase winding of the stator winding is arranged in a complete rotational symmetry mode on the cir