permanent magnet rotor and a permanent magnet rotary assembly

A permanent magnet rotor and a permanent magnet rotary assembly are provided. The permanent magnet rotor includes a rotor core, a plurality of permanent magnets and a non-magnetic retaining ring. Therotor core is magnetically permeable. The rotor core has an outer surface and a plurality of dovetail grooves on the outer surface. The permanent magnets are respectively disposed in the plurality ofdovetail grooves. The non-magnetic retaining ring is inserted over the rotor core. The plurality of permanent magnets are surrounded by the non-magnetic retaining ring. The non-magnetic retaining ringis magnetically impermeable. 种永磁式转子与永磁式转动构件，该永磁式转子包含转子铁心、多个永久磁铁及非磁性外固定环。转子铁心具导磁性，并具有外表面及自外表面向内凹陷的多个鸠尾槽。这些永久磁铁分别卡合于这些鸠尾槽。非磁性外固定环套设于转子铁心，并将这些永久磁铁环绕于内。其中，非磁性外固定环不具导磁性。本发明还公开了具有上述永磁式转子的永磁式转动构件。