Permanent Magnet Rotating Electric Machine

摘要

A permanent magnet rotating electric machine includes a rotor and a stator. The rotor includes: a permanent magnet forming a single pole within a rotor core of the rotor, the permanent magnet being divided into two across a magnetic pole center and arranged such that the magnetic pole center and a magnetization direction of the permanent magnet extend in parallel with each other; a connecting portion assuming an electrical steel sheet disposed between the two divided permanent magnets; and magnet insertion holes in which the permanent magnets are inserted. In the rotor, the magnet insertion hole is shaped to include: air gaps at both end portions in a width direction of the permanent magnet, each air gap being formed between a surface of the permanent magnet extending perpendicularly to the magnetization direction and a surface of the electrical steel sheet facing the surface of the permanent magnet; a shoulder portion disposed on the facing surface, the shoulder portion having a length shorter than a thickness in the magnetization direction of the permanent magnet; and another air gap extending toward a rotor outside diameter side and the magnetic pole center side in a direction perpendicular to the shoulder portion on an outside of the shoulder portion.