Driving method of control power in 5-shaft controlled magnetic bearing

Abstract

Abstract PURPOSE:To reduce a number of circuit part items and improve reliability from miniaturization of an amplifier, by applying a complete push-pull system to a driver control circuit of a 5-shaft controlled bearing. CONSTITUTION:In case of using a push-pull amplifier 17, for the direction of an x-axis, for instance, excitation coils 3a, 3f are connected in series and connected to the push-pull amplifier 17 to feed a control current. Also for the direction of a y-axis, excitation coils are connected in the similar method. Then directional position signals of the x and y-axes from radially directional position detectors 1, 1' are fed to a control circuit 19, and the control circuit 19 applies a control signal to the push-pull amplifier 17. While all of the excitation coils 3b, 3e, 3d, 3g, 3'b, 3'e, 3'd, 3'g, in which a constant current Ia flows, are arranged in series connection then connected to a constant curent circuit 20, and bearing rigidity can be easily changed by adjusting this circuit 20.

Inventors

• 👤 「湧」井　伸二
• 👤 Shinji Wakui

Bibliographic Details