PERMANENT MAGNET SYNCHRONOUS MOTOR

摘要

Disclosed is a permanent magnet synchronous motor capable of adequate alleviation of cogging torque of 2f and 4f components. A permanent magnet synchronous motor comprises z status slots (21) formed in a circular shape, with a coil applied thereupon; a rotor (1) positioned within the circular shape of the status slots (21); and a 2P pole ring magnet (11) configured in unison with the rotor (1) and positioned in opposition to the status slots (21). The value z / {3 (phase) × 2P} is configured to be either 2/5 or 2/7. A continuous skew is disposed on the surface of the ring magnet (11) that faces the status slots (21) such that the electrical degree with respect to the axial direction of the rotor (1) is 42-128 degrees.