| 摘要 |
PCT No. PCT/SE89/00536 Sec. 371 Date Apr. 12, 1991 Sec. 102(e) Date Apr. 12, 1991 PCT Filed Oct. 2, 1989 PCT Pub. No. WO90/04281 PCT Pub. Date Apr. 19, 1990.A squirrel-cage induction motor for frequency converter operation includes a rotor which has a rotor core with a plurality of substantially axially extending rotor slots in which rotor conductors are arranged, each rotor slot having a main portion in which a rotor conductor is arranged and a slot opening arranged between the main portion and that surface of the rotor facing the air gap of the motor, and a magnetic bridge arranged to separate the slot opening from the main portion of the slot, wherein the ends of the magnetic bridge adjoin the rest of the rotor core on either side of the slot opening, and the portion of the bridge opposite to the ends extends into the main portion of the slot.
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