Patent ID: 7911106

Claim:
A rotary electric machine having at least one AC phase, the rotary electric machine comprising: a rotor; and a stator disposed around the rotor, including a stator core having a plurality of axially extending slots spaced along an inner periphery region of the stator core and armature windings accommodated in the slots; wherein: each slot contains four armature bars each extending in an axial direction of the stator core; each armature winding is formed by electrically connecting at least one of the armature bars in a first slot and at least one of the armature bars in a second slot to each other; the armature bars of a pair specified in accordance with a required output voltage of the rotary electric machine are connected to each other, via a connecting piece; each armature winding is a one-turn winding formed by serially connecting one of the armature bars in the first slot and one of the armature bars in the second slot, via the connecting piece; two of the one-turn windings are formed in parallel using two of the armature bars in the first slot and two of the armature bars in the second slot; each AC phase has two parallel circuit branches each composed of the one-turn windings; each armature bar has a coil end on its both ends; and connections of two of the armature bars on each coil end have two types of connection configurations: a forward connection and a reverse connection.