Permanent magnet embedded type rotor for rotating electrical machine and rotating electrical machine having permanent magnet embedded type rotor

A permanent magnet embedded type rotating electrical machine comprising:

• a rotary shaft;
• a rotor including:
• a rotor core formed by a plurality of laminated magnetic steel plates;
• and
• a plurality of permanent magnets embedded in the rotor core in an axial direction of the rotary shaft;
• and
• a stator having a coil,
• wherein each magnetic steel plate has a plurality of pairs of magnet holes, a plurality of pairs of joining portions and a plurality of peninsula portions, the magnet holes of each pair are disposed at positions adjacent to an outer periphery of the magnetic steel plate so as to form a V-shape that is divergent toward the outer periphery of the magnetic steel plate, the joining portion is configured to connect the magnet hole with a circumference of the peninsula portion and the peninsula portion is formed surrounded by a pair of the magnet holes and a pair of the joining portions, and
• wherein a distance between a center of the rotor core and at least one of a pair of ends of the circumference of the peninsula portion is smaller than a distance between the center of the rotor core and an intersection of a d-axis of the rotor and the circumference of the peninsula portion.