Patent ID: 9576715
Date: 2017-02-21
CPC Classifications: H01F,H02K

Claim:
1. A device for magnetizing a ring-shaped magnet for a brushless direct current (BLDC) motor, comprising: a rotor having a ring-shaped magnet installed on an outer peripheral surface of a rotor core; and a plurality of magnetizing yokes disposed so as to be spaced apart from each other by a predetermined interval while facing an outer peripheral surface of the ring-shaped magnet, magnetizing the ring-shaped magnet to form even-numbered unit magnets, and magnetizing the ring-shaped magnet only in regions except for one end and the other end of the unit magnets; wherein a magnetizing angle of the magnetizing yoke for the unit magnet is 0.7 to 0.8 times a pole pitch of the unit magnet.