PERMANENT MAGNET SYNCHRONOUS MACHINE AND COMPRESSOR USING SAME

摘要

The purpose of the present invention is to enable the improvement of efficiency in a distributed winding permanent magnet synchronous machine. The permanent magnet synchronous machine is provided with a distributed winding stator having a plurality of teeth, and a rotor arranged with a gap in a radial direction with respect to the stator. The rotor has magnet housing holes formed therein while a plurality of magnetic poles constituted by permanent magnets inserted into the magnet housing holes being circumferentially arranged in the rotor. The winding coefficient of the stator is 0.966 or more, and the axial length LFe (mm) of a stator core, the outer diameter Dso (mm) of the stator core, and the number of poles P are set to satisfy a relationship of LFe > 1.635 ∙ Dso / P + 50.705.