Patent ID: 7851959

Claim:
A permanent magnet electric rotating machine comprising: a stator having a stator iron core and three phase stator windings being wound on the stator iron core; and a rotor arranged opposite the stator with a rotation air gap in between, and said rotor having a rotor iron core, a plurality of auxiliary magnetic pole portions formed in the rotor iron core, a plurality of permanent magnets embedded in said rotor iron core and arranged between the auxiliary magnetic pole portions, a plurality of magnetic pole piece portions provided between the permanent magnets and a periphery of the rotor, and a plurality of bridge portions provided between the magnetic pole piece portions and an auxiliary magnetic pole, wherein said permanent magnets are magnetized so that the permanent magnets having an auxiliary magnetic pole portion therebetween have opposite magnetic polarity of each other; and magnetic saturation of the bridge portions restrains magnetic flux leakage due to the auxiliary magnetic pole portions.