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6 April 2006 Performance and applications of novel magnetic actuator using composite of Terfenol-D and PZT
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A novel configuration of composite of Terfenol-D and stack PZT actuator is proposed for coil-free magnetic force control. This magnetic force control is based on the inverse magnetostrictive effect of magnetostrictive materials whereby the stress resulting magnetic force is controlled by the voltage of the actuator. The advantages, zero power consumption to maintain constant of the magnetic force and small power supply are inherited from characteristics of piezoelectric material. In addition, the configuration of the composite without rigid structure to apply pre-stress is simple and compact compared with our conventional one. In this paper, the measurements of the magnetic force with different size of the magnets and pre-strain clarified the magnetic force is strongly dependent on bias magnetic field and prestress. Linear stepping motor and magnetic levitation taking the advantage of low power consumption to maintain the position of the mover or levitated yoke are also introduced with some experimental results to discuss the potential of the device for practical applications.
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Toshiyuki Ueno and Toshiro Higuchi "Performance and applications of novel magnetic actuator using composite of Terfenol-D and PZT", Proc. SPIE 6170, Smart Structures and Materials 2006: Active Materials: Behavior and Mechanics, 61700P (6 April 2006);

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