Interior permanent magnet rotor, interior permanent magnet type rotary electric machine, and a method for manufacturing of interior permanent magnet rotor

摘要

A magnet composed of annularly arranged permanent magnets (110) and a rotor core (111) and end face plates (114) installed on both end faces of an annular body of the core are formed by a nonmagnetic annular disk (112) , And a ring member (113) having a linear expansion coefficient smaller than that of an annular disk (112) provided in contact with the inner periphery of the annular disk (112) are integrally formed by shrinkage fitting, and the end face plate (109) having the same coefficient of linear expansion as the ring member (113) is press-fitted into the hollow portion on the inner peripheral side of the ring member (113) which is the center hole (118) of the ring member (114).