Abstract: An electric machine operable as a motor or generator includes a stator having a body portion substantially in the shape of a hollow column with an outer wall and an inner wall. The body portion has a plurality of first slots and a plurality of second slots each running through the body portion in a longitudinal direction. The plurality of first slots are distributed in a circumferential direction between the outer wall and the inner wall, and the first slots are circumferentially closed slots. The plurality of second slots are distributed in the circumferential direction between the first slots and the inner wall, and the second slots are circumferentially closed slots and are spaced apart from the first slots.

Abstract: A stator core for an electric motor may include a main body part formed by a plurality of stacked electromagnetic steel sheets, the main body part being provided with at least a first through hole extending axially with a first pin located in the first through hole. A first end cover is located at a first end of the main body part and connected to a first pin end of the first pin. A second end cover is located at a second end of the main body part and connected to a second pin end of the first pin. The connections of the first end cover and the second end cover to the first pin generate tensile stresses in the main body part to reduce core losses.