Electric rotating machine

An electric rotating machine comprising:

• a rotor fixed on a pivotably supported rotor shaft;
• and
• a stator containing the rotor,
• wherein the stator has a stator core and a stator coil mounted on the stator core through the intermediary of an insulating bobbin,
• wherein the stator core has a ring-shaped back yoke portion and a tooth portion whose front-end portion protrudes from the back yoke portion toward the rotor shaft,
• wherein at the front-end portion of the tooth portion, the stator core has a shoe portion that extends in the circumferential direction of the electric rotating machine from the tooth side surface portion in the circumferential direction of the electric rotating machine,
• wherein the insulating bobbin includes a first insulating bobbin and a second insulating bobbin that are fitted onto both respective endfaces of the stator core in an axial direction of the electric rotating machine,
• wherein at least one of the first insulating bobbin and the second insulating bobbin has a coil winding portion around which a conductor wire included in the stator coil is wound and whose cross section is U-shaped,
• wherein the coil winding portion has a tooth-endface facing portion that faces an endface portion, in the axial direction, of the tooth portion, a tooth-side-surface facing portion that faces a tooth side surface portion, and a shoe-side-surface facing inner wall surface portion that faces a shoe side-surface portion, in the circumferential direction, of the shoe portion,
• where the shoe-side-surface facing inner wall surface portion has a first abutting area that abuts on the shoe side-surface portion, and
• wherein the tooth-side-surface facing portion has a second abutting area that abuts on the tooth side surface portion and a middle inner wall surface portion that is situated between the first abutting area and the second abutting area and faces the tooth side surface portion via a space.