| 摘要 |
<p>Provided is a radial direction controller capable of handling changes in unbalanced rigidity in accordance with the mounting orientation. This radial direction controller (10A), which is a magnetic bearing device (1) that lifts and supports a rotating body (2) by means of electromagnets (4a, 5a), is equipped with: a radial control circuit (11) for controlling displacement of the axis (Ax) of the rotating body (2) in the radial direction; an unbalance elimination circuit (12) that is connected in parallel with the radial control circuit (11) and outputs a signal pertaining to the unbalanced rigidity; converters (61, 62, 63, 64) that output current values on the basis of the output signals from these circuits (11, 12) for the purpose of controlling the electromagnets (4a, 5a); filters (76, 77, 78, 79) that extract the DC component from the current values; computing units (81, 82, 83, 84) that compute correction coefficients (C) on the basis of the extracted DC components and the bias current (I0) of the electromagnets (4a, 5a); and multiplication units (55, 56, 57, 58) that multiply the computed correction coefficients (C) with the signal output from the unbalance elimination circuit (12).</p> |
