Patent ID: 10305339

Abstract:
A rotating electrical machine includes a stator having a stator core, coil groups, and a rotor. The coil groups include a first coil group located at an outer circumference side of the stator core and a second coil group located at an inner circumference side of the stator core. The first and second coil groups are formed into an annular shape by inserting unit coils into stator core slots so that the coils adjacent in a circumferential direction overlap alternately in a radial direction and so that an inside and an outside of the overlap alternate with each other. The first coil group is disposed to surround an outside of the second coil group. The first and second coil groups are disposed in a concentric manner. The unit coils constituting the second coil group have shorter circumferential lengths than the unit coils constituting the first coil group.