Patent ID: 8334629

Claim:
An electric rotating machine, comprising: a rotor having plural magnetic poles along its periphery; and a stator having teeth that are disposed opposite to the periphery of the rotor, wherein the stator includes a first three-phase coil system and a second three-phase coil system, the first three-phase coil system being formed by a U-phase coil, a V-phase coil and a W-phase coil, and a second three-phase coil system being formed by another U-phase coil, another V-phase coil and another W-phase coil and connected in parallel to the first three-phase coil system, the first three-phase coil system and the second three-phase coil system are disposed at the stator so that a difference of an electrical angle between the first three-phase coil system and the second three-phase coil system is within a range of 20 to 40 degrees, the stator includes a first coil turn, and a second coil turn coupled in series with the first coil turn and having a polarity opposite to a polity of the first coil turn, within a range of 360 electrical degrees, each of the first coil turn and the second coil turn is wound so as to span an electrical angle less than 180 electrical degrees in a circumferential direction, and a tooth constituting a part of a stator magnetic pole, wound with the other phase coils, is disposed between the first coil turn and the second coil turn.