Rotor of rotary electric machine and method for manufacturing rotor
A rotor includes a rotor core and a plurality of magnets accommodated in each accommodation hole of the rotor core. The rotor core has a radial core thickness that is different on one side and the other side in a radial direction with the accommodation hole in between. The accommodation hole is formed surrounded by first side surfaces facing each other in a radial direction and second side surfaces facing each other in a circumferential direction. The magnet consists of two divided magnets arranged in the circumferential direction within the accommodation hole. The two divided magnets are biased in the radial direction so as to be close to the first side surface on a side having a thicker radial core thickness among both radial sides of the accommodation hole, and are biased so as to be close to the second side surface in the circumferential direction.
1 . A rotor of a rotary electric machine, comprising:
a rotor core made of soft magnetic material;
a plurality of magnets each accommodated in a plurality of accommodation holes provided at predetermined intervals in a circumferential direction in the rotor core; and
a filler filled in the accommodation hole and for fixing the magnet, wherein
the rotor core has a radial core thickness that is different on one side and the other side in a radial direction with the accommodation hole in between,
the accommodation hole is formed surrounded by first side surfaces facing each other in a radial direction and second side surfaces facing each other in the circumferential direction,
the magnet is composed of two divided magnets arranged in the circumferential direction within the accommodation hole,
the two divided magnets are biased in the radial direction so as to be close to the first side surface on a side having a thicker radial core thickness among both radial sides of the accommodation hole, and are biased so as to be close to the second side surface on an opposite side from the other divided magnet in the circumferential direction, and
in the accommodation hole, the filler is filled in a spaced apart region between the divided magnets and the rotor core, which is formed by biasing each of the divided magnets in the radial and circumferential directions.
2 . The rotor of the rotary electric machine according to claim 1 , wherein
each of the divided magnets is divided into two in an axial direction, and
the divided magnets arranged in the axial direction are spaced apart from each other in the accommodation hole, and the spaced apart region is filled with the filler.
3 . The rotor of the rotary electric machine according to claim 1 , wherein
in the two divided magnets, a radial thickness dimension on a d-axis side, which is a magnetic pole center, is larger than a radial thickness dimension on a q-axis side, which is a magnetic pole boundary.
4 . A rotor of a rotary electric machine, comprising:
a rotor core made of soft magnetic material; and
a plurality of magnets each accommodated in a plurality of accommodation holes provided at predetermined intervals in a circumferential direction in the rotor core; wherein
the rotor core has a radial core thickness that is different on one side and the other side in a radial direction with the accommodation hole in between,
the accommodation hole is formed surrounded by first side surfaces facing each other in the radial direction and second side surfaces facing each other in the circumferential direction,
the magnet is composed of two divided magnets arranged in the circumferential direction within the accommodation hole,
the two divided magnets are biased in the radial direction so as to be close to the first side surface on a side having a thicker radial core thickness among both radial sides of the accommodation hole, and are biased so as to be close to the second side surface on an opposite side from the other divided magnet in the circumferential direction.