Method of magnetizing a ring-shaped magnet

Details Method of magnetizing a ring-shaped magnet Method of magnetizing a ring-shaped magnet

1997-03-31

2000-06-27

Silbauch, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Producing or treating magnetic product precursor thereof

29607, 148103, 148108, 264DIG58, 425 3, B29C 7104, H01F 1300

Patent

active

060803525

ABSTRACT:
A brushless permanent-magnet direct current motor has a permanent magnet which is magnetized to create an offset angle between detent and mutual torques for providing sufficient starting torque for all relative orientations between the stator and the rotor of the motor. This is accomplished by providing a permanent magnet in which the global magnetization of the magnet has been disrupted by the application of a local magnetic field to a portion of the magnet, thereby to provide a magnetic anomaly in the global magnetization. Also, a method of magnetization of the magnet is described.

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