Interior permanent magnet synchronous motor with optimized thicknesses and sectional areas

摘要

In the rotor core, three or more magnet housing holes for housing magnets are formed in the circumferential direction, and when it is assumed that a stack thickness of the rotor core is X, a stack thickness of the stator core is Y, a sectional area of a core portion surrounded by a line connecting midpoints of an inner diameter side surface of each of the magnet housing holes is S3, a sectional area of an outer-peripheral-side core portion provided between an outer diameter side surface of each of the magnet housing holes and an outer periphery of the rotor core is S2, a sectional area obtained by subtracting the sectional area S2 and the sectional area S3 from a sectional area of the rotor core is S1, the rotor stack thickness is formed so as to satisfy the relation of XY and XY(1+(S2/S1)×2).