Abstract: A rotor used for a motor includes a rotor core, and a plurality of permanent magnets embedded in a corresponding plurality of embedding holes in the rotor core configured to include flux barriers at both ends of the plurality of embedding holes in the rotor core and to include a plurality of magnetic poles. The rotor core includes a plurality of grooves on an outer peripheral surface, the plurality of grooves, with the two paired grooves, are away from an axis that becomes the q-axis when the motor is operated, and are arranged symmetrically about the axis, and the rotor core has such a cross-section that a first angle between two lines passing through the two grooves and the center of the rotor core is smaller than a second angle between the axis-side end face of the two flux barriers adjacent to each other across the axis.

Abstract: A rotor for a rotating electric machine includes a rotor core provided with a pair of first magnets and a pair of second magnets that are located closer than the first magnets to an outer peripheral side of the rotor core. The rotor core includes a caulking portion disposed in a region between first and second imaginary lines in a radial direction of the rotor core. The first imaginary line is an arc passing through outer-peripheral-side end portions of respective long sides of rectangular-shaped cross sections of the first magnets. The second imaginary line is an arc passing through inner-peripheral-side end portions of respective long sides of rectangular-shaped cross sections of the second magnets. The arc of each of the first and second imaginary lines has a center of curvature that lies at an intersection of extensions of the long sides of the rectangular-shaped cross sections of the second magnets.

Abstract: A rotor to be provided in a rotating electric machine. The rotor includes a rotor core provided with a pair of flux barriers and a void portion. A pair of magnets are provided in the pair of flux barriers. Each of the pair of magnets has a rectangular shape in its cross section. The void portion is located on an inner peripheral side than an imaginary line connecting between inner-peripheral-side corners of the pair of magnets. A first width is defined by a shortest distance between the pair of flux barriers. A second width is defined by a distance from the void portion to an intersection point at which the imaginary line intersects with a shortest line segment whose length corresponds to a shortest distance between one of the pair of magnets and the void portion. The second width is smaller than the first width.