Title:
INDUCTANCE MEASURING DEVICE FOR ELECTROMAGNET IN MAGNETIC BEARING, AND METHOD
Document Type and Number:
Japanese Patent JP3124510
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an inductance measuring device and method for an electromagnet in a magnetic bearing which measures inductance of a radial position controlling electromagnet when radial position of a main shaft is placed in the center of the radial position controlling electromagnet with plural poles.
SOLUTION: Jigs 11a, 11b are inserted into a gap between the left top part of a main shaft 1 and an outer cylinder 18, and a gap between the right top part of the main shaft 1 and an outer cylinder 18, respectively. The left top part and the right top part of the main shaft 1 are tightly inserted into inner surfaces of jigs 11a, 11b, respectively. The main shaft 1 is placed in the center of the radial position controlling electromagnets 3w1-3w4 by the jigs 11a, 11b. In other words, the jigs 11a, 11b are inserted so that difference between a gap (x) between the radial position controlling electromagnets 3w1-3w4 and the main shaft 1, and a normal gap (Xo) is as small as possible. Then, a LCR measuring device 12 measures inductance L of the radial position controlling electromagnets 3w1-3w4.
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Inventors:
Eiwei Toki
Application Number:
JP14589797A
Publication Date:
January 15, 2001
Filing Date:
May 20, 1997
Export Citation:
Assignee:
Seiko Seiki Co., Ltd.
International Classes:
G01R27/26; F16C32/04; (IPC1-7): F16C32/04; G01R27/26
Domestic Patent References:
| JP771456A | ||||
| JP6313426A |
Attorney, Agent or Firm:
Masatoshi Shiina