| 摘要 |
<p>A sensorless magnetic bearing apparatus supports a rotating (1) object using magnetic levitation by a magnetic force of electromagnets (2,3). The magnetic bearing apparatus includes a PWM driver (4) configured to supply exciting currents to the electromagnets (2,3), a driver power source (5) configured to drive the PWM driver (4), and a displacement error signal removing section configured to extract a displacement error signal (verr) of the displacement information (vdisp) from a current (ie) flowing through the driver power source (5) and to remove (15) the displacement error signal (verr) from the displacement information (vdisp).</p> |
