ROTOR AND ELECTRIC MOTOR

The present invention provides a rotor comprising: a main body composed of a soft magnetic material; and a permanent magnet provided inside or outside the main body. The permanent magnet is a bonded magnet comprising a magnet powder and a binder resin that binds the magnet powder. The bonded magnet includes 87-96 mass % of the magnet powder relative to the bonded magnet as a whole. The magnet powder includes coarse powder having an average particle diameter of 40-200 μm and fine powder having an average particle diameter of 1-10 μm. The coarse powder has a mass ratio of 60-90 mass % to a total of the coarse powder and the fine powder. The binder resin includes a thermosetting resin. The bonded magnet has a resin layer with an average thickness of 0.1-5 μm, for example, in a vicinity of a joint interface with the main body. The bonded magnet can be firmly joined to the main body, and the rotor can therefore rotate at high speed. The main body is, for example, a rotor core of an IPM motor.