| 摘要 |
An electromagnetic attraction magnetic bearing comprises at least a pair of electromagnets (1, 2) arranged oppositely, a float (3) arranged between the electromagnets and held at the middle position thereof, a sensor (4) for detecting displacement of the float (3) from a balance position and/or the speed thereof, and a controller (5) for controlling the electromagnets (1, 2). The controller (5) determines a variable (Z) proportional to acceleration in the control direction from the displacement and speed of the float (3), sets the control current of one electromagnet to zero depending on the positive/negative sign of the variable, and controls only the control current of the other electromagnet.
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