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A permanent magnet machine combines both principles of variable reluctance machines and permanent magnets, and comprises a rotor with salient rotor poles and a stator with salient stator poles. A pair of ferrite arched permanent magnets are embedded in the stator yoke beneath respective stator poles

A permanent magnet machine combines both principles of variable reluctance machines and permanent magnets, and comprises a rotor with salient rotor poles and a stator with salient stator poles. A pair of ferrite arched permanent magnets are embedded in the stator yoke beneath respective stator poles and are arranged symmetrically around the central axis of the machine. A field winding for boosting or weakening the primary flux generated by the permanent magnets is wound in a special arrangement.

대표청구항 ▼

[ What is claimed is:] [1.] A permanent magnet machine comprising:a rotor mounted for rotation about a central axis and comprising:a plurality of salient rotor poles being spaced at equal angular intervals around said central axis and extending radially outward therefrom;a stator comprising:a stator

[ What is claimed is:] [1.] A permanent magnet machine comprising:a rotor mounted for rotation about a central axis and comprising:a plurality of salient rotor poles being spaced at equal angular intervals around said central axis and extending radially outward therefrom;a stator comprising:a stator yoke, the stator yoke being of a round shape in its cross-section and having first and second similar sections, arranged symmetrically around the central axis,a first and a second plurality of salient stator poles being spaced at equal angular intervals around the central axis and extending radially inward from the stator yoke, said first section having said first plurality of stator poles, and said second section having said second plurality of stator poles, andfirst and second arched permanent magnets embedded in the stator yoke, the first permanent magnet being interposed between the first section of the stator yoke and said first plurality of the stator poles, and the second permanent magnet being interposed between the second section of the stator yoke and said second plurality of the stator poles, said first and second permanent magnets forming a primary flux path through said stator yoke between said first and second sections;a plurality of armature windings, each being individually coiled about a stator pole of said first plurality of stator poles and a diametrically opposite stator pole of said second plurality of stator poles, anda field winding excited by a constant or slowly varying current permanently coupled with said primary flux path and interposed between said first and second sections and wound along a length of the stator yoke.