Title:
POWER AMPLIFICATION DEVICE AND MAGNETIC BEARING
Document Type and Number:
WIPO Patent Application WO/2005/045266
Kind Code:
A1
Abstract:
Power amplification devices (15, 16) include: a current instruction device (17) for outputting a current instruction signal based on the current target value to be supplied to electric magnets (4, 5); a power amplifier (18) for amplifying the current instruction signal and supplying current to the electric magnets (4, 5); and a current detection device for detecting current flowing in the electric magnets (4, 5). The current instruction device (17) feeds back the current detection value obtained by the current detection device (19) and controls the current instruction signal so that the current detection value is equal to the current target value.
Inventors:
GACHTER STEFAN MARTIN BENJAMIN (JP)
Application Number:
PCT/JP2004/016172
Publication Date:
May 19, 2005
Filing Date:
October 25, 2004
Export Citation:
Assignee:
KOYO SEIKO CO (JP)
GACHTER STEFAN MARTIN BENJAMIN (JP)
GACHTER STEFAN MARTIN BENJAMIN (JP)
International Classes:
F16C32/04; F16C39/06; H02K7/09; (IPC1-7): F16C32/04
Foreign References:
| JP2002039178A | 2002-02-06 | |||
| JPH0712125A | 1995-01-17 | |||
| JPH0984214A | 1997-03-28 | |||
| JPH06229419A | 1994-08-16 | |||
| JPH1070865A | 1998-03-10 | |||
| JPH08145056A | 1996-06-04 | |||
| JPH1122730A | 1999-01-26 |
Other References:
See also references of EP 1701050A4
Attorney, Agent or Firm:
Hibi, Norihiko c/o Kishimoto & Co. (3rd Floor Inaba Building, 13-18,
Nishishinsaibashi 1-chome, Chuo-k, Osaka-shi Osaka 86, JP)
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