Mitsubishi Electric Corporation

Norihiro Achiwa

Kazumasa Ito

Masatsugu Nakano

Shinichi Yamaguchi

Haruyuki Kometani

Masaya Harakawa

Yoshiki Maeda

With regard to an end portion shape of a slit formed in a rotor core in which flux barriers are formed in a circumferential direction in an identical number to the number of poles by arranging one or more slits and core layers alternately in a radial direction, an end portion of a slit is shaped such that, when mis set as the number of slit end portions, nis set as a natural number no smaller than 1, &#x3b1; and &#x3b2; are set as numbers within a range of &#x2212;&#xbc; to &#xbc;, q is set as a natural number no smaller than 1, and Nis set as the number of slots, intervals &#x3b4;and &#x3b5;from a first slit end to an islit end of a slit wall on an identical circumferential direction side satisfy specific mathematical formulae.

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Chiyoda-ku, Japan

Norihiro Achiwa