Permanent magnet motor

摘要

A motor is provided, which produces a high level of torque, displays minimal distortion of the induced voltage waveform, and is capable of being optimized in accordance with the required levels of controllability and cogging torque. The motor comprises a stator (11), in which windings (3) are wound around each of a plurality of stator teeth (2) provided on a stator core (1), and a rotor (12), in which a plurality of permanent magnets (5) that exceeds the number of stator teeth (2) are disposed at equal intervals around a periphery of a rotor core (4). In this motor, the stator teeth (2) are arranged into a plurality of stator teeth groups (I,II,III), in which the windings (3) to which the same phase voltage is applied are positioned adjacent to one another, and the windings (3) on adjacent stator teeth (2) in the group (I,II,III) are wound in opposite directions. Furthermore, an interpolar angle &thetas;s (deg) between the stator teeth (2) within each stator teeth group (I,II,III) is set to any angle that satisfies the requirement: 360/P (deg) ≤&thetas;s (deg) ≤ 360/T (deg) where T is the total number of stator teeth (2) and P is the total number of permanent magnets (5).