Stator for electric motor

A stator for an electric motor, the stator comprising:

• a stator core defining a rotor receiving hole, the stator core including a plurality of slots and a plurality of teeth that are provided around the rotor receiving hole;
• and
• a stator coil wound around the stator core via the plurality of slots,
• wherein the stator coil comprises a plurality of hairpins inserted into the plurality of slots and connected in series with one another, the plurality of hairpins including (i) high voltage distribution hairpins having a high voltage distribution ratio based on receiving power and (ii) low voltage distribution hairpins having a low voltage distribution ratio based on receiving power,
• wherein adjacent ones of the plurality of hairpins are spaced apart from each other by a partial discharge suppression distance that is configured to suppress partial discharge between the adjacent ones of the hairpins, and
• wherein the partial discharge suppression distance between adjacent high voltage distribution hairpins among the plurality of hairpins is greater than the partial discharge suppression distance between adjacent low voltage distribution hairpins among the plurality of hairpins.