Rotor structure and permanent magnet exciting motor

The invention belongs to the technical field of motor manufacturing, and discloses a rotor structure and a permanent magnet exciting motor. The rotor structure comprises a rotor yoke, a plurality of first rotor teeth and a plurality of second rotor teeth which are alternately distributed on the rotor yoke in an annular array, wherein first rotor permanent magnets are arranged between the adjacentfirst rotor teeth and the adjacent second rotor teeth; and a second rotor permanent magnet is arranged on each second rotor tooth. Thus, the using amount of a part of permanent magnets is replaced through the second rotor teeth, the using amount of the permanent magnets is reduced, the matching density of the rotor teeth and the permanent magnets in unit volume is improved, and then the utilization rate of the permanent magnets is improved; and moreover, a magnetism gathering effect can be realized through the first rotor permanent magnets on two opposite sides of the second rotor teeth, the magnetic load of the motor