INTERIOR PERMANENT MAGNET MOTOR AND COMPRESSOR

摘要

This interior permanent magnet motor is constructed by installing a rotor core (7), which is created by laminating multiple electromagnetic steel plates together, inside a stator. Magnets that constitute magnetic poles of the rotor core (7) comprise: ferrite magnets (4) which are provided on the outer periphery side of the rotor core (7) in the circumferential direction of the rotor core (7) only in a number corresponding to the number of the poles; and rare-earth magnets (3) which are provided between the ferrite magnets (4). Each of the ferrite magnets (4) is arranged such that the center of the ferrite magnet (4) is placed at an inter-polar position (20) between the magnetic poles (21), and is magnetized such that the magnetization direction is changed at the inter-polar position (20).