PERMANENT MAGNET MOTOR, SEALED COMPRESSOR, AND REFRIGERATION CYCLE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a reliable permanent magnet motor which can make a magnetic flux amount of each magnetic pole in a rotor uniform and can obtain a stable operation characteristic and to provide a sealed compressor and a refrigeration cycle device. SOLUTION: The rotor 12 is divided into a first block 12a and a second block 12b in an axial direction. First permanent magnets 43 with low coercive force and second permanent magnets 44 with high coercive force are alternately arranged in the first block 12a along a circumferential direction thereof. The first permanent magnets 43 with the low coercive force and the second permanent magnets 44 with high coercive force are alternately disposed in the second block 12b along the circumferential direction thereof. Especially in arrangement of the permanent magnets 43 and 44 in the first block 12a and that of the permanent magnets 43 and 44 in the second block 12b, a positional relation where characteristics of the permanent magnets 43 and 44 become alternate along the circumferential direction of the rotor 12 is set. A spacer 45 being a magnetic body is arranged between the first block 12a and the second block 12b. COPYRIGHT: (C)2011,JPO&INPIT