Permanent magnet rotating machine

Details Permanent magnet rotating machine Permanent magnet rotating machine

2011-03-15

2011-03-15

Nguyen, Tran N (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156530, C310S156560

Reexamination Certificate

active

07906882

ABSTRACT:
Permanent magnets52a1, 52a2are inserted into magnet insert holes51a1, 51a4formed in a main magnetic pole50A of a rotor50. An outer circumferential surface of the rotor includes a first outer circumferential surface portion50awhich intersects with a d-axis and second outer circumferential surface portions50da,50abwhich intersect with a q-axis. A radius R2of curvature of the second outer circumferential surface portions50da,50abis larger than a radius of curvature of the first outer circumferential surface portions50a. Recesses50a1, 50a2are formed in the second outer circumferential surface portions50da,50aband in a position to face end walls51a2, 51a5of the magnet insert holes51a1, 51a4which are adjacent to the outer circumferential surface of the rotor. It is constructed such that [(74/P)°≦θ≦(86/P)°] and [(16/P)°≦α≦(48/P)°], where θ is a mechanical angle of the first outer circumferential surface portion50a, P is the number of pairs of poles of the rotor 50, and α is a mechanical angle of the recesses50a1, 50a2.

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