Outer rotor of permanent magnet assisted synchronous reluctance motor and permanent magnet synchronous motor comprising the same

An outer rotor of a motor, the outer rotor comprising:

• an annular rotor core and a plurality of permanent magnets;
• wherein the annular rotor core comprises a central hole;
• the annular rotor core further comprises a plurality of slots, and the plurality of permanent magnets are disposed in the plurality of slots and form a plurality of magnetic poles along a circumferential direction of the rotor core;
• each magnetic pole comprises three shapes of permanent magnet:
• a first arc-shaped permanent magnet concentric with the rotor core and having a uniform thickness, a second arc-shaped permanent magnet not concentric with the rotor core, and a rectangular permanent magnet;
• in each magnetic pole, the three shapes of permanent magnet are symmetrically arranged along a center line L of the magnetic pole, and the first arc-shaped permanent magnet, the second arc-shaped permanent magnet and the rectangular permanent magnet are sequentially spaced radially from inside to outside;
• an inner arc-shaped surface of the first arc-shaped permanent magnet and an inner circular sidewall of the rotor core are of equal radius and form a flush structure;
• one magnetic pole comprises at least three first arc-shaped permanent magnets, one second arc-shaped permanent magnet, and two rectangular permanent magnets;
• the at least three first arc-shaped permanent magnets are arranged at intervals along the circumferential direction of the rotor core, and a magnetic channel is formed between every two adjacent first arc-shaped permanent magnets;
• the second arc-shaped permanent magnet is located between the at least three first arc-shaped permanent magnets and the rectangular permanent magnet, and the second arc-shaped permanent magnet is not in contact with the inner circular sidewall and outer circular sidewall of the rotor core;
• and an inner arc surface of the second arc-shaped permanent magnet covers at least one first arc-shaped permanent magnet and at least two magnetic channels.