| 摘要 |
<p>PURPOSE:To prevent oscillation of a magnetic bearing by way of controlling a rotor shaft normally by respectively setting a displacement detection point of a displacement sensor and a working point of a force in an electromagnet on the same flat surface in a magnetic bearing device to support the rotor shaft. CONSTITUTION:A displacement sensor 8 is made with coils 11a, 11b wound around its cores 10a, 10b in the +Xa, +Ya directions of its half donut shape core main body 10, and a displacement sensor 9 is constituted in the same way. When a rotor shaft 1 is displaced on a line A2-A2, the displacement sensors 8, 9 detect displacements Xa, Xb. A displacement signal output by a sensor circuit 15 comes to be an average value Xab of each of the displacements Xa, Xb. As the average value Xab is the same as the one of the rotor shaft 1 displaced on a flat surface B, a displacement detection point of the displacement sensors 8, 9 is to equivalently exist on the flat surface B. Subsequently, working points f, f on an electromagnet 3 is set on the flat surface B, and the displacement detection point and the working points f, f of a force are sent on the same flat surface B.</p> |
