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Patent Searching and Data


Title:
ELECTRIC MOTOR SYSTEM AND MAGNETIC BEARING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/019463
Kind Code:
A1
Abstract:
Provided are an electric motor system and a magnetic bearing system that are capable of suitable detecting the amount of eccentricity and the direction of eccentricity. An electric motor system (S) is characterized by comprising: an electric motor (1) that has a stator (2) and a rotor (6) supported by magnetic levitation and that is configured by each phase having at least two parallel coils; a circulating current detection means (21, 12) that detects the circulating current flowing in the coil for each of at least two phases among the phases; and an eccentricity estimation means (13) that estimates the amount of eccentricity and the direction of eccentricity of the rotor (6) on the basis of the circulating current detected by the circulating current detection means (21, 12).

Inventors:
MARUYAMA Eri (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
SUZUKI Takahiro (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2013/071494
Publication Date:
February 12, 2015
Filing Date:
August 08, 2013
Export Citation:
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Assignee:
HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
International Classes:
F16C32/04; H02K7/09
Foreign References:
JP2013126273A2013-06-24
JPS6372916A1988-04-02
JPH09168298A1997-06-24
JP2010088267A2010-04-15
Attorney, Agent or Firm:
ISONO Michizo (Sabo Kaikan Annex 7-4, Hirakawa-cho 2-chome, Chiyoda-k, Tokyo 93, 〒1020093, JP)
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