Patent ID: 7750525

Claim:
An electric rotating machine comprising a stator core having a plurality of slots that are formed in an inner peripheral face of the stator and that are equally spaced in the peripheral direction, a rotor that rotates inside the stator core, and armature windings that are disposed in the slots, wherein each of the armature windings comprises a plurality of serially-connected single-turn coils that are respectively disposed in the slots to form serially-connected coils of respective phases, disposed in the slot, wherein the serially-connected coils of respective phases are connected in parallel to one another, wherein each of the armature windings is comprised of three 2-turn coils connected in parallel to form one phase, each 2-turn coil being comprised of two single-turn coils that are serially connected and disposed in a single slot, wherein each single-turn coil comprises two layers connected in series; wherein the number of slots of the stator core is an integral multiple of 18; wherein each of the armature windings includes a connection side and a non-connection side; wherein, for each of the armature windings, a first turn coil pitch of the armature winding disposed in the slot is equal to a second turn coil pitch, and a coil pitch at the connection side that is electrically connected at the coil is equal to a coil pitch at the non-connection side; and wherein coil ends of the armature windings at the connection side are connected via connecting pieces having a connection pitch of three.