公开(公告)号：US20150097458A1

公开(公告)日：2015-04-09

申请号：US14394770

申请日：2012-04-16

Applicant: OTIS ELEVATOR COMPANY

Inventor： JimPo Wang ,  Zbigniew Piech

IPC: H02K1/27

Abstract: A rotor for a permanent magnet electric machine includes a rotor core and a plurality of permanent magnet bundles located at the rotor core. Each permanent magnet bundle includes a first magnet of a first magnetic material and a second magnet of a second magnetic material located radially outboard of the first magnet. The second magnet has an increased resistance to demagnetization relative to the first magnet. A permanent magnet electric machine includes a stator and a rotor magnetically interactive with the stator. The rotor includes a rotor core and a plurality of permanent magnet bundles located at the rotor core. Each permanent magnet bundle includes a first magnet of a first magnetic material and a second magnet of a second magnetic material located radially outboard of the first magnet. The second magnet has an increased resistance to de-magnetization relative to the first magnet.

Abstract translation: 用于永磁电机的转子包括转子芯和位于转子铁芯处的多个永磁体束。 每个永磁体束包括第一磁性材料的第一磁体和位于第一磁体的径向外侧的第二磁性材料的第二磁体。 第二磁体相对于第一磁体具有增加的退磁阻力。 永磁电机包括定子和与定子磁性交互的转子。 转子包括转子芯和位于转子芯处的多个永磁体束。 每个永磁体束包括第一磁性材料的第一磁体和位于第一磁体的径向外侧的第二磁性材料的第二磁体。 第二磁体相对于第一磁体的抗磁化强度增加。