| 摘要 |
Magnetic flux short-circuit preventing slits (104a, 104b) extending from opposite ends of two permanent magnets (103a, 103b) forming a magnetic pole of a rotor (100) with magnetic pole centre (Pc). A pair of grooves (105a, 105b) is formed on the outer circumferential surface of the rotor (100) and located symmetrically with respect to the pole centre (Pc) and to grooves of adjacent magnet pole centres. Following equations are fulfilled : ¸f=n*Äs and ¸s=n*Äs; with ¸f designates the angle between two flux short-circuit preventing slits (104a,104b) of one pole, ¸s designates the angle between the pair of grooves (105a,105b), Äs designates the angular pitch of stator winding slots (201), n designates an integer.
Thus, it is possible to provide a permanent magnet-embedded type rotary electric machine in which the influence of manufacturing errors can be minimized so that cogging torque can be reduced. |
