Aichi Elec Co.

Mutsuo Tomita

Shigeru Okuma

Shinji Doki

Seiichi Kaneko

Mitsuhiko Sato

Permanent magnetsare inserted into magnet insert holesformed in a main magnetic poleA of a rotor. An outer circumferential surface of the rotor includes a first outer circumferential surface portionwhich intersects with a d-axis and second outer circumferential surface portionswhich intersect with a q-axis. A radius Rof curvature of the second outer circumferential surface portionsis larger than a radius of curvature of the first outer circumferential surface portions. Recessesare formed in the second outer circumferential surface portionsand in a position to face end wallsof the magnet insert holeswhich are adjacent to the outer circumferential surface of the rotor. It is constructed such that [(74/P)&#xb0;&#x2266;&#x3b8;&#x2266;(86/P)&#xb0;] and [(16/P)&#xb0;&#x2266;&#x3b1;&#x2266;(48/P)&#xb0;], where &#x3b8; is a mechanical angle of the first outer circumferential surface portion, P is the number of pairs of poles of the rotor 50, and &#x3b1; is a mechanical angle of the recesses

Permanent magnet rotating machine

Permanent magnetsare inserted into magnet insert holesformed in a main magnetic poleA of a rotor. An outer circumferential surface of the rotor includes a first outer circumferential surface portionwhich intersects with a d-axis and second outer circumferential surface portionswhich intersect with a q-axis. A radius Rof curvature of the second outer circumferential surface portionsis larger than a radius of curvature of the first outer circumferential surface portions. Recessesare formed in the second outer circumferential surface portionsand in a position to face end wallsof the magnet insert holeswhich are adjacent to the outer circumferential surface of the rotor. It is constructed such that [(74/P)&#xb0;&#x2266;&#x3b8;&#x2266;(86/P)&#xb0;] and [(16/P)&#xb0;&#x2266;&#x3b1;&#x2266;(48/P)&#xb0;], where &#x3b8; is a mechanical angle of the first outer circumferential surface portion, P is the number of pairs of poles of the rotor, and &#x3b1; is a mechanical angle of the recesses

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Nagoya, Japan

Mutsuo Tomita