ROTOR, PERMANENT-MAGNET MOTOR, MOTOR DRIVE SYSTEM, AND VEHICLE

A rotor is provided, and is used in a permanent-magnet motor. The rotor includes a rotating shaft () and a rotor iron core () sleeved on the rotating shaft (). The rotor further includes several first permanent-magnet structures (), the several first permanent-magnet structures () are distributed on the rotor iron core () in a circumferential direction of the rotor iron core (), each first permanent-magnet structure () includes a first permanent magnet () and a second permanent magnet () that are disposed in a radial direction of the rotor iron core (), and coercive force of the first permanent magnet () is less than coercive force of the second permanent magnet ().