Abstract: A stator configured with an annular stator core, and a plurality of coils mounted on the stator core and each including a winding portion formed by winding a rectangular conductor in a loop shape, a bus bar portion extended from one end in a radial direction of the stator core in the winding portion, and a terminal portion extended from the other end in the radial direction of the stator core in the winding portion. A bus bar portion is formed so that a longitudinal direction extends perpendicularly to a direction of a central axis of the stator core. The terminal portion is formed so that the longitudinal direction extends perpendicularly to the direction of the central axis of the stator core. The bus bar portion is joined to the terminal portion of a different one of the coils.

Abstract: A stator includes: a stator core having a plurality of slots and teeth parts; and coils each formed by winding a flat conductor and disposed in the slots. Of the corners of the rectangular cross-section of the flat conductor, a first corner located on the inner circumference side of the coil when the flat conductor is wound to form the coil is provided with a round chamfer having a radius larger than that of another corner. When the coil is inserted into the slots of stator core elements, the rectangular cross-section of the coil is disposed such that the first corner faces toward the outer circumference side of the stator.