Rotor for permanent magnet embedded-type motor and motor using the same

A permanent magnet embedded-type motor, comprising:

• housing;
• a stator fixed within the housing;
• and
• a rotor rotatably mounted within the stator,
• wherein the rotor, comprises:
• a rotor core having a rotary shaft fixed to a center and having a plurality of magnet insertion holes formed to be spaced along a circumferential direction,
• a plurality of pairs of permanent magnets, respectively, inserted into each of the plurality of magnet insertion holes in a V-shape to be gradually spaced apart from each other toward a radially outer side,
• a plurality of rivet holes formed through along the circumferential direction between the magnet insertion hole and a rotary shaft hole with the rotary shaft fixed of the rotor core;
• and
• a plurality of weight-losing holes formed through along the circumferential direction between the magnet insertion hole and the rotary shaft hole with the rotary shaft fixed of the rotor core,
• wherein each of the plurality of magnet insertion holes comprises a pair of inner sides facing each other,
• wherein a barrier hole is further formed to expand an inner space of each of the magnet insertion holes so as to protrude toward each other from the pair of inner sides, respectively,
• wherein the plurality of weight-losing holes are formed to intersect with a circle connecting centers of the plurality of rivet holes, and
• wherein an extension line of a symmetry axis of each of the magnet insertion holes is positioned to pass the center of each of the rivet holes.

A permanent magnet embedded-type motor, comprising:

• housing;
• a stator fixed within the housing;
• and
• a rotor rotatably mounted within the stator,
• wherein the rotor, comprising:
• a rotor core having a rotary shaft fixed to a center and having a plurality of magnet insertion holes formed to be spaced along a circumferential direction;
• a plurality of pairs of permanent magnets, respectively, inserted into each of the plurality of magnet insertion holes in a V-shape to be gradually spaced apart from each other toward a radially outer side,
• a plurality of rivet holes formed through along the circumferential direction between the magnet insertion hole and a rotary shaft hole with the rotary shaft fixed of the rotor core;
• and
• a plurality of weight-losing holes formed through along the circumferential direction between the magnet insertion hole and the rotary shaft hole with the rotary shaft fixed of the rotor core,
• wherein each of the plurality of magnet insertion holes comprises a pair of inner sides facing each other,
• wherein a barrier hole is further formed to expand an inner space of each of the magnet insertion holes so as to protrude toward each other from the pair of inner sides, respectively,
• wherein the plurality of weight-losing holes are formed to intersect with a circle connecting centers of the plurality of rivet holes, and
• wherein the plurality of weight-losing holes are symmetrical with respect to a straight line connecting a center of an interval between the pair of the adjacent magnet insertion holes and the center of the rotary shaft hole.

A rotor for a permanent magnet embedded-type motor, comprising:

• a rotor core having a rotary shaft fixed to a center and having a plurality of magnet insertion holes formed to be spaced along a circumferential direction;
• a plurality of pairs of permanent magnets, respectively, inserted into each of the plurality of magnet insertion holes in a V-shape to be gradually spaced apart from each other toward a radially outer side,
• a plurality of rivet holes formed through along the circumferential direction between the magnet insertion hole and a rotary shaft hole with the rotary shaft fixed of the rotor core;
• and
• a plurality of weight-losing holes formed through along the circumferential direction between the magnet insertion hole and the rotary shaft hole with the rotary shaft fixed of the rotor core,
• wherein each of the plurality of magnet insertion holes comprises a pair of inner sides facing each other,
• wherein a barrier hole is further formed to expand an inner space of each of the magnet insertion holes so as to protrude toward each other from the pair of inner sides, respectively,
• wherein the plurality of weight-losing holes are formed to intersect with a circle connecting centers of the plurality of rivet holes, and
• wherein the plurality of weight-losing holes are symmetrical with respect to a straight line connecting a center of an interval between the pair of the adjacent magnet insertion holes and the center of the rotary shaft hole.