Rotor core of electric rotary machine

A rotor of an electric rotary machine comprising:

• a rotor core having a plurality of slots opening toward the outer peripheral surface of the rotor core and teeth formed between the slots;
• a spidery end plate located at a side of said rotor core and having notches opposing said slots and projections opposing said teeth;
• a rotor winding buried in said slots and said notches and tightly wound about said rotor core and said spidery end plate;
• and
• slot cell insulators, formed individually and separate from said spidery end plate, provided between said rotor winding and said rotor core, the distance from the axis of said rotor core to a bottom of said notch being made slightly longer than that to a bottom of said slot, and each of said slot cell insulators being formed of an insulating sheet, an end of which is placed into said notch;
• each of said projections of said spidery end plate having an end surface thereof which faces away from said rotor core when looking in the axial direction of said rotor core, said end surface being inclined progressively further away from the end surface of said rotor core as it becomes more distant from the axis of said rotor core at least along a portion thereof extending outward from the bottom of the notch in the radial direction of the rotor core.