Title:
MAGNETIC BEARING CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3636939
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a magnetic bearing control device reducible in cost by reducing the applied number of current control power transistors.
SOLUTION: X-direction and Y-direction thrust commands FX, FY applied to a rotor 6 from thrust control circuits 17, 18 are polar-coordinate-converted into a thrust size F and a thrust direction angle A by a polar coordinates converter 23, and a three-phase current value converter 24 converts the thrust size F and thrust direction angle A into three-phase current values Cu, Cv, Cw. A three-phase current control circuit 25 controls currents Iu, Iv, Iw flowing to coils 28, 29, 30, so as to coincide with the three-phase current values Cu, Cv, Cw from the three-phase current value converter 24, and three pole teeth of a stator 27 are excited to compensate the eccentricity of the rotor 6.
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Inventors:
Koichi Hayashi
Application Number:
JP20226799A
Publication Date:
April 06, 2005
Filing Date:
July 15, 1999
Export Citation:
Assignee:
Okuma Corporation
International Classes:
F16C32/04; F16C39/06; (IPC1-7): F16C32/04
Domestic Patent References:
| JP61052411A | ||||
| JP61066219U | ||||
| JP61180019A | ||||
| JP6313425A | ||||
| JP47038373U |
Attorney, Agent or Firm:
Kenji Yoshida
Jun Ishida
Jun Ishida