Rotor of rotary electric machine and rotary electric machine using the same
View Patent ↗An object is to provide a rotary electric machine capable of suppressing degradation of strength in high-speed rotation and reducing a torque ripple. A rotor of a rotary electric machine according to the present invention includes a rotor core provided with a magnet insertion hole that forms a space into which a permanent magnet is inserted and a non-magnetic portion facing the space to form a part of the magnet insertion hole, wherein the non-magnetic portion is provided asymmetrically with respect to a d-axis.
1. A rotor of a rotary electric machine comprising a rotor core provided with a magnet insertion hole that forms a space into which a permanent magnet is inserted and a non-magnetic portion facing the space to form a part of the magnet insertion hole,
wherein the non-magnetic portion is provided asymmetrically with respect to a d-axis and
wherein the non-magnetic portion is provided in an electric angle position between 12° and 38° from the d-axis.
2. The rotor of the rotary electric machine according to claim 1 , wherein the d-axis passes through a center of the magnet insertion hole.
3. The rotor of the rotary electric machine according to claim 1 , wherein the rotor core is formed by alternately stacking steel plates having different positions of the non-magnetic portions.
4. A rotary electric machine comprising:
the rotor according claim 1 ; and
a stator provided in an outer circumference side of the rotor by interposing a gap.
5. A rotor of the rotary electric machine comprising a rotor core provided with a magnet insertion hole that forms a space into which a permanent magnet is inserted and a non-magnetic portion facing the space to form a part of the magnet insertion hole,
wherein the non-magnetic portion is provided asymmetrically with respect to a d-axis,
wherein the magnet insertion hole includes a first magnet insertion hole that forms a first space into which the first permanent magnet is inserted and a second magnet insertion hole that forms a second space into which the second permanent magnet is inserted,
the non-magnetic portion includes a first non-magnetic portion facing the first space to form a part of the first magnet insertion hole, and a second non-magnetic portion facing the second space to form a part of the second magnet insertion hole, and
the first non-magnetic portion is formed to be larger than the second non-magnetic portion in a circumferential direction with respect to the d-axis.
6. The rotor of the rotary electric machine according to claim 5 , wherein the non-magnetic portion is provided in an electric angle position between 12° and 38° from the d-axis.
7. The rotor of the rotary electric machine according to claim 5 , wherein the d-axis passes through a center of the magnet insertion hole.
8. The rotor of the rotary electric machine according to claim 5 , wherein the rotor core is formed by alternately stacking steel plates having different positions of the non-magnetic portions.