A rotor for a rotary electric machine includes a rotor core made of
magnetic material, and being in the form of a disk, and a plurality of
magnet sets each including a pair of permanent magnets whose polarities
are identical to each other. The magnet sets are arranged
circumferentially in the rotor core so that the polarities of the magnet
sets change alternately. The rotor core includes nonmagnetic portions
each formed between adjacent two of the magnet sets.