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Patent Searching and Data


Title:
MAGNETIZER FOR STEP MOTOR
Document Type and Number:
Japanese Patent JPH03195344
Kind Code:
A
Abstract:

PURPOSE: To facilitate manufacture of high torque, high output motor by simultaneously magnetizing all permanent rod magnets burried in the groove of rotor tooth.

CONSTITUTION: A magnetizing yoke 21 incorporates a block of rotor cores 7 to form a closed magnetic circuit having cross sections, in the circumferential direction and one axial direction of the block of the rotor cores 7, between the magnetizing yoke 21 and the rotor core 7. Two magnetizing coils 22a, 22b, for forming an axial magnetizing field, are disposed coaxially with the rotor core 7 in the space of the magnetizing yoke 21. Consequently, magnetizing flux to be produced by energizing the magnetizing coils 22a, 22b is bent radially from the axial direction, while symmetrically to the center of the core, and forms flux loops 26a, 26b. Since the flux penerates radially between the circumferential face of the rotor core and opposing magnetizing yoke, all permanent rod magnets burried in the teeth of the rotor core can be magnetized simultaneously.


Inventors:
SAKAI KAZUTO
MORINO ISAMU
NAKATSUKA HARUO
TAKEUCHI IWAO
Application Number:
JP33117389A
Publication Date:
August 26, 1991
Filing Date:
December 22, 1989
Export Citation:
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Assignee:
SHIBAURA ENG WORKS LTD
TOSHIBA CORP
International Classes:
H02K1/27; H02K15/03; H02K37/02; H02K37/04; (IPC1-7): H02K1/27; H02K15/03; H02K37/02
Attorney, Agent or Firm:
Shoko Inomata (1 person outside)