Sealed motor-driven compressor

To improve holding power of an Nd-Fe-B based sintered magnet while ensuring a magnetic force of a motor. A sealed motor-driven compressor comprises a compression mechanism section for compressing a refrigerant, and a motor for driving the compression mechanism section. The motor comprises a stator including a coil, and a rotor including an iron core and a permanent magnet. The permanent magnet is composed of an Nd-Fe-B compound to which a middle-heavy rare earth element has been added, and the refrigerant is R32. The quantity of the middle-heavy rare earth element per unit volume in 5 nm from a grain field of a matrix grain of the Nd-Fe-B compound is more than the quantity of the middle-heavy rare earth element per unit volume inner than 5 nm from the grain field of the matrix grain. 本发明提供一种确保电动机的磁力并提高Nd-Fe-B系烧结磁铁的保持力的密闭型电动压缩机。密闭型电动压缩机具备对制冷剂进行压缩的压缩机构部和驱动压缩机构部的电动机，电动机包括具有线圈的定子和具有铁芯及永久磁铁的转子，永久磁铁由添加了中重稀土类元素的Nd-Fe-B化合物构成，制冷剂为R32，Nd-Fe-B化合物的距母相粒的粒界为5nm的每单位体积的中重稀土类元素的量多于距母相粒的粒界比5nm靠内部的每单位体积的中重稀土类元素的量。