公开(公告)号：IN8943DEN2014A

公开(公告)日：2015-05-22

申请号：IN8943DEN2014

申请日：2014-10-25

Applicant: OTIS ELEVATOR CO

Inventor： WANG JIMPO ,  PIECH ZBIGNIEW

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 demagnetization relative to the first magnet.

公开(公告)号：EP2839567A4

公开(公告)日：2016-05-11

申请号：EP12874469

申请日：2012-04-16

Applicant: OTIS ELEVATOR CO

Inventor： WANG JIMPO ,  PIECH ZBIGNIEW

IPC: H02K1/27

CPC classification number: H02K1/2766 ,  H02K1/02

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.