| 摘要 |
<p>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.</p> |
