ELECTRIC MOTOR WITH EMBEDDED PERMANENT MAGNET, AND REFRIGERATION AND AIR CONDITIONING EQUIPMENT EQUIPPED WITH SAME

摘要

A permanent magnet embedded electric motor (1) includes a slit (25) and a flux barrier (23). A hole defining portion of a magnet insertion hole includes an extended portion (11b). The extended portion projects toward an interpolar core portion (11c) in a rotor core (11) in an area positioned further on an outer side of a circumferential direction with respect to a width-direction end surface of a permanent magnet (13). (Lb) is larger than (La), and (Lc) is smaller than (Ld), where the (La) represents a distance between the slit and the core outer peripheral surface; the (Lb) represents a distance between the slit and an outer peripheral-side surface of the permanent magnet; the (Lc) represents a shortest distance between the extended portion and the interpolar core portion; and the (Ld) represents a thickness of the permanent magnet.