ROTARY ELECTRIC MACHINE WITH ROTOR INCLUDING LOW-COERCIVITY AND HIGH-COERCIVITY MAGNETS

Abstract: a rotor for a rotary electric machine incudes an annular stack of rotor lamination layers (“rotor lams”) constructed of a magnetic core material. the rotor lams include inner axial surfaces collectively defining a first plurality of openings through the magnetic core material, a second plurality of openings through the magnetic core material, and a third plurality of openings through the magnetic core material. each respective one of a first plurality permanent magnets, a second plurality of permanent magnets, and a third plurality of permanent magnets, is disposed respectively within a corresponding one of the first plurality of openings, the second plurality of openings, and the third plurality of openings. the first plurality and the third plurality of permanent magnets include high-coercivity magnets. the second plurality of permanent magnets includes low-coercivity magnets.

Inventor(s): Alireza Fatemi, Thomas W. Nehl, Derek F. Lahr, Xiaofeng Yang, Anthony M. Coppola, Peng Peng

CPC Classification: H02K1/2766 ({having a flux concentration effect})

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