B22 永久磁石とリニアアクチュエータを利用した非接触浮上機構の零パワー制御(OS2 磁気浮上・磁気軸受の制御1)

概要

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This paper describes a new zero power control strategy for a hanging type maglev system. In this maglev device, a permanent magnet generates the levitation force, and a Voice Coil Motor (VCM) maintains the device stably in an equilibrium- levitated position. In order to realize zero power control, a spring is installed in the maglev device so as to counterbalance the force of the actuator on the mass gravitation, and a current integral feedback loop is used in the controller so as to adjust the actuator current zero in the balance state. A prototype of the maglev system was constructed; a theoretical model was developed; a zero power controller was designed and constructed; and numerical simulations and experiments were performed. The results shown here suggest that this zero power control strategy is feasible and effective for the hanging type maglev system using a permanent magnet and VCM.
2009-09-01