Stator of rotating electric machine

A stator of a rotating electric machine, the stator comprising:

• a stator core having a plurality of slots;
• and
• a stator coil configured by connecting a plurality of conductor segments comprising:
• one or more first-type conductor segments each having a conductor and a first sheath part surrounding and insulating an outer surface of the conductor;
• and
• one or more second-type conductor segments each having a conductor, a first sheath part, and a second sheath part surrounding and insulating a part of an outer surface of the first sheath part,
• wherein each of the conductor segments comprises:
• two insertion parts configured to be inserted into different slots among the plurality of slots;
• a crown part connecting respective first ends of the two insertion parts;
• and
• welding parts extending from respective second ends of the two insertion parts to be connected by welding, and
• wherein the second-type conductor segment is disposed in a section having a relatively high voltage distribution ratio, and
• wherein the first sheath parts of the first-type conductor segments and the second-type conductor segments are formed to surround an entire length of the conductor segment, and
• wherein the second sheath part of the second-type conductor segments is formed to surround the first sheath part at the crown part, and
• wherein the second sheath part comprises:
• a first section and a second section having different average thicknesses,
• wherein the first section includes a center bending part, and
• wherein the first section has a greater coating thickness compared to the second section.