リラクタンス制御形磁気浮上システム

永久磁石とリニアアクチュエータを用いた浮上機構

抄録

A new type of magnetic suspension system is proposed which uses a permanent magnet. In this system, the attractive force is adjusted by controlling the reluctance of the magnetic circuit. Since no electromagnet is necessary, this system is effective for saving energy and avoiding heat generation. The composition of this paper is as follows. First, we explain the principle of this suspension system and introduce various types of magnetic circuits for reluctance control. Second, we examine the possibility of one of them from the viewpoint of linear control theory. Third, we develop an experimental device based on the proposed suspension method. The reluctance of this device is controlled by the air gap which is between the magnet and the suspended object, and which is adjust by driving a permanent magnet by piezoelectric actuator. Experimental results support well the theoretical predictions.