Patent ID: 7095192

Claim:
An automotive rotating electric machine driven by a battery via an inverter, said automotive rotating electric machine comprising: an armature including: a ring-shaped armature core with slots formed in a curved inner surface thereof; and an armature winding which includes coils fitted in the armature core and terminals by which the coils are connected to said inverter; and a field-generating unit rotatably mounted inside the armature, the field-generating unit including: magnetic poles; and a field winding for producing magnetic fluxes from the magnetic poles; wherein resistance 2Ra0 is expressed by 2Ra0=Vmax/√{square root over (3)} Iamax, where Vmax is a maximum voltage applicable across any two of the terminals from said inverter and Iamax is a maximum current which must be fed from said inverter into each of the terminals when the maximum voltage Vmax is applied for maximizing torque produced by said automotive rotating electric machine at a power factor of 1 under voltage saturation conditions; and wherein the armature winding is configured such that resistance 2Ra across any two of the terminals satisfies a relationship expressed by 0.8Ra0≦2Ra≦3.8Ra0.