ROTATING ELECTRIC MACHINE

摘要

A rotating electric machine includes a rotor including: a rotor core divided into blocks in an axial direction, the blocks being arranged to have a phase angle therebetween in a circumferential direction, the rotor core having magnet through holes arrayed in the circumferential direction and formed in an outer circumferential region; and permanent magnets inserted into the magnet through holes. The magnet through hole includes: a magnet insertion portion into which the permanent magnet is inserted; and a non-magnetic portion provided on an outer side of the magnet insertion portion in the circumferential direction. A bridge portion is formed between the outer circumferential surface and an outer circumferential inner wall of the non-magnetic portion. A bridge angle, which is an angle between both circumferential ends of the bridge portion with a rotation center of the rotor core set as a vertex, is larger than a skew angle.

主权项

1. A rotating electric machine, comprising a rotor,
the rotor comprising:
a rotor core divided into a plurality of blocks in an axial direction of the rotor core,
the plurality of blocks being arranged to have a phase angle therebetween in a circumferential direction of the rotor core so that a stepped skew is formed in the rotor core,the rotor core having a plurality of magnet through holes arrayed in the circumferential direction and formed in an outer circumferential region of the rotor core; anda plurality of permanent magnets inserted into the plurality of magnet through holes so that a first magnetic pole and a second magnetic pole are formed alternately in the circumferential direction on an outer circumferential surface of the rotor core, wherein each of the plurality of magnet through holes comprises:
a magnet insertion portion into which each of the plurality of permanent magnets is inserted; anda non-magnetic portion provided on an outer side of the magnet insertion portion in the circumferential direction, for suppressing sneaking of a magnetic flux from a radially-outer side surface of the each of the plurality of permanent magnets to a radially-inner side surface of the each of the plurality of permanent magnets, wherein the non-magnetic portion has an outer circumferential inner wall formed along the outer circumferential surface of the rotor core so that a bridge portion is formed between the outer circumferential surface of the rotor core and the outer circumferential inner wall of the non-magnetic portion, and wherein a bridge angle, which is an angle between both circumferential ends of the bridge portion with a rotation center of the rotor core set as a vertex of the angle, is equal to or larger than a skew angle, which is the phase angle between the plurality of blocks adjacent to each other.