Rotor assembly and permanent magnet motor

The application provides a rotor assembly and a permanent magnet motor. The rotor assembly includes a rotor core (1). The rotor core (1) is provided with installation slots (2) along the circumferential direction. A permanent magnet (3) is installed in each installation slot (2). First air slots (4) are respectively arranged at the two ends of each installation slot (2). Second air slots (5) are arranged on the side near the first air slots (4) between the center line of the magnetic pole and the first air slots (4). A first extension part (8) extends towards the center line of the magnetic pole from each first air slot (4), and the first extension parts (8) are spaced apart from the second air slots (5). By adopting the rotor assembly of the application, the torque fluctuation of the permanent magnet motor during operation can be greatly reduced the on the premise of ensuring the electromagnetic torque of the motor. 本申请提供一种转子组件和永磁电机。该转子组件包括转子铁芯(1)，转子铁芯(1)上沿周向设置有安装槽(2)，安装槽(2)内安装有永磁体(3)，安装槽(2)的两端分别设置有第一空气槽(4)，