Title:
回転子磁極極性の判別可能な永久磁石形同期電動機
Document Type and Number:
Japanese Patent JP3558308
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a structure of permanent magnet type synchronous motor employing an inexpensive permanent magnet rotor having low remanent magnetic flux density in which the polarity of rotor pole can be judged by formed a high flux density region on the armature or rotor core. SOLUTION: An armature core 5a is constituted by laminating magnetic and nonmagnetic materials 15, 16 alternately in the axial direction such that the armature core 5a is positioned in the vicinity of inflection point on the magnetization characteristics of flux density by the flux generated from a permanent magnet 3 mounted on a rotor core 2. A pulse voltage is applied to an armature winding 17 and the difference of response current is increased between the magnetizing and demagnetizing directions of armature winding 17 at the time of transient thus judging the position and polarity of pole of the permanent magnet 3 mounted on a rotor core 2.
Inventors:
Akihide Makoto
Application Number:
JP25941395A
Publication Date:
August 25, 2004
Filing Date:
September 12, 1995
Export Citation:
Assignee:
Fuji Electric Systems Co., Ltd.
International Classes:
H02P23/00; H02K1/27; H02K11/00; H02K21/16; (IPC1-7): H02K21/16; H02K1/27; H02K11/00; H02P5/28
Domestic Patent References:
| JP3207250A | ||||
| JP58218843A | ||||
| JP698489A | ||||
| JP59147U |
Attorney, Agent or Firm:
Iwao Yamaguchi
Kiyoshi Matsuzaki
Yoshihide Komada
Kiyoshi Matsuzaki
Yoshihide Komada