초록 ▼

A three-phase permanent-magnet electric rotating machine having necessary performance which can be realized easily at a low cost, wherein a stator includes a stator iron core having a disc portion and 3n magnetic poles formed so as to be erected at right angles from an outer circumference of the dis

A three-phase permanent-magnet electric rotating machine having necessary performance which can be realized easily at a low cost, wherein a stator includes a stator iron core having a disc portion and 3n magnetic poles formed so as to be erected at right angles from an outer circumference of the disc portion, and excitation windings mounted on the magnetic poles so as to have a predetermined width in the axial direction, and wherein a rotor is constituted by permanent magnets magnetized into N and S poles arranged alternately in the direction of rotation of the rotor and the rotor is supported so as to face the top ends of the respective magnetic poles of the stator through a predetermined air gap. In this case, the number n is an integer not smaller than 1. Alternatively, n may be selected to be an even number not smaller than 2 so that the excitation windings may be mounted on every other one of the magnetic poles. Preferably, a plurality of magnetic teeth of a predetermined shape may be formed on each of the top end portions of the magnetic poles formed in the stator iron core. Further preferably, excitation windings are mounted on first and second stator iron cores which are doubly arranged so as to be concentric with each other to thereby form a stator provided with a double structure of the magnetic poles.

대표청구항 ▼

[ What is claimed is:] [1.] A three-phase permanent-magnet electric rotating machine comprising:a stator which includes a stator iron core made from a magnetic material and having a disc portion and 3n (n being an integer not smaller than 1) magnetic poles erected perpendicularly from an outer circu

[ What is claimed is:] [1.] A three-phase permanent-magnet electric rotating machine comprising:a stator which includes a stator iron core made from a magnetic material and having a disc portion and 3n (n being an integer not smaller than 1) magnetic poles erected perpendicularly from an outer circumference of said disc portion, said disc portion and said 3n magnetic poles formed from a single sheet of said magnetic material, and excitation windings mounted on said magnetic poles respectively, each of said windings having a predetermined width in an axial direction; anda rotor having a permanent magnet by which a predetermined number of pairs of N and S magnetic poles are formed alternately in a direction of rotation of said rotor and so as to be opposite to said magnetic poles piercing said excitation windings at top end portions of said magnetic poles respectively beyond said excitation windings.