ROTOR STRUCTURE OF PERMANENT MAGNET TYPE MOTOR

To provide a rotor structure of a permanent magnet type motor which can increase torque of a motor, reduce flux leakages, and reduce core loss.SOLUTION: A rotor structure of a permanent magnet type motor comprises: a rotor with an annular body 21, of which plurality of first slots 22 are radially arranged in the body along a radial direction of the body spaced apart from one another, plurality of second slots 23 are interposed between the adjacent first slots, respectively, and which is arranged in a circumferential direction of the body; a plurality of first magnets 30 fitted into the respective first slots; and a plurality of second magnets 40 fitted into the respective second slots, in which a distance α between a side separated from a center of curvature of the body of the respective second magnets and an outer peripheral edge of the body, and a difference β between an inner diameter and an outer diameter of the body make a ratio between the distance and diameter distance into a range of 0.43 to 0.48.SELECTED DRAWING: Figure 2 【課題】モータのトルクを増大させ、漏れ磁束を減少すると共に鉄損を低減できる永久磁石式モータの回転子構造を提供する。【解決手段】環状本体２１を備え、複数の第１スロット２２は、それぞれ互いに間隔を空けて前記本体の半径方向に沿って前記本体に放射状に配置され、複数の第２スロット２３がそれぞれ隣接する各前記第１スロットの間に介在し、前記本体の円周方向に配置される回転子と、各前記第１スロット内に嵌設された複数の第１磁石３０と、各前記第２スロット内に嵌設された複数の第２磁石４０と、を含む永久磁石式モータの回転子構造であって、各前記第２磁石の前記本体の曲率中心から離れた側と前記本体の外周縁間の距離α、及び前記本体の内径と外径間の差βは、前記距離／前記径差の比を０．４３〜０．４８の範囲にさせる、永久磁石式モータの回転子構造。【選択図】図２