초록 ▼

A rotor for an electrical machine has large permanent magnets located at half the pole locations, with alternating pole locations containing ferromagnetic projections which become consequent poles in the rotor. The permanent magnet poles have a high reluctance, while the ferromagnetic poles have a v

A rotor for an electrical machine has large permanent magnets located at half the pole locations, with alternating pole locations containing ferromagnetic projections which become consequent poles in the rotor. The permanent magnet poles have a high reluctance, while the ferromagnetic poles have a very low reluctance, thereby affording variable flux linkage between the rotor and a stator. Magnetic homogeneity is improved, while susceptibility to thermal degradation in the rotor is reduced substantially.

대표청구항 ▼

A permanent magnet rotor for an electrical machine, comprising: a ferromagnetic yoke; a plurality of permanent magnets installed about the periphery of said ferromagnetic yoke to form permanent magnet poles, said ferromagnetic yoke having a plurality of radially outwardly extending projections dispo

A permanent magnet rotor for an electrical machine, comprising: a ferromagnetic yoke; a plurality of permanent magnets installed about the periphery of said ferromagnetic yoke to form permanent magnet poles, said ferromagnetic yoke having a plurality of radially outwardly extending projections disposed between said permanent magnets, said ferromagnetic projections being consequent ferromagnetic poles; a plurality of damper bars fitted between said permanent magnet poles and said ferromagnetic poles, said damper bars made of a non-ferromagnetic, conducting material; and a retaining hoop placed in interference fit fashion over said permanent magnets, said ferromagnetic projections, and said damper bars.