| 摘要 |
The circuit for controlling the position of a rotor (31) supported along a predetermined axis (y', y) with the aid of two active magnetic bearing elements placed in opposition on either side of the rotor along the axis y', y and each equipped with an electro magnet winding (26, 28) on the basis of signals xd delivered by a detector (5a, 5b) for detecting the position of the rotor along this axis y' y, controls the power supply to the windings in response to the signals delivered by the detector (5a, 5b). The control circuit includes a correction network (8) and two power amplifying circuits (22, 24) with each of which there are associated feedback loops for current (32, 34) and flux (38, 40). Additional electrical means (10, 12, 14, 16, 18, 20) delivering a reference signal phi 1, phi 2 for each of the power amplifiers (22, 24) are placed at the output of the correcting network (8) so that the ratio between the force demand fc issued from this correcting network (8) and the resultant force f along the predetermined axis y' y is kept constant as a function of the dynamic load, that is to say regardless of the amplitude of this demand fc. <IMAGE> |
