Title:
MAGNETIC BEARING DEVICE AND COMPRESSOR
Document Type and Number:
Japanese Patent JP2014228091
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To inhibit degradation in the controllability of a magnetic bearing following a change in the fluctuation width of a load.SOLUTION: A magnetic bearing main body (21) supports a rotational shaft (33) in a noncontact manner by a combined electromagnetic force (F) of at least a pair of control electromagnets (201 and 203). A control unit (11) controls a ratio of a fluctuation amount of the combined electromagnetic force (F) to that of a control current (Id) so that a fluctuation index value dependent on a magnitude of a fluctuation width of the control current (Id) flowing in a control coil 23d) of the paired control electromagnets (201 and 203) is closer to a preset target fluctuation index value.
Inventors:
SAKAWAKI ATSUSHI
NAKAZAWA YUJI
IRINO YUSUKE
YAMASHITA NAOYA
NAKAZAWA YUJI
IRINO YUSUKE
YAMASHITA NAOYA
Application Number:
JP2013109575A
Publication Date:
December 08, 2014
Filing Date:
May 24, 2013
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
F16C32/04; F04D29/058
Attorney, Agent or Firm:
Patent business corporation MAEDA PATENT OFFICE
Previous Patent: JP2014228090
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