Magnetic Circuit for the Magnetic Actuator and Electrical Generator by Means of Magnetostriction Alloy
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概要
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Novel magnetic circuit, which is combined with AC and DC magnetic fields, has been developed for the actuator by means of magnetostriction alloys. This magnetic circuit is also useful for high field creation for the nano laboratory or micro laboratory. The material of the yoke of the circuit was 99.99% pure Iron (Fe) and two coils were used for AC magnetic flux density. In order to adjust the DC fields, few ferrite magnets were used. Using this circuit, the magnetic flux density up to 1 T was generated in an aperture of 6.0 mm width and 2.0×2.0 mm square.Terfenol-D, which shows large magnetostriction, was established into the aperture of the magnetic circuit and AC magnetic flux density were applied by flowing the current of the electricity into the coils. We designed two type actuators. One is the actuator under the atmospheric pressure. The magnetostriction of Terfenol-D in this actuator is 680 ppm, which corresponds 4.0 μm displacement for 20 Vpp output from an audio amp as use of power supply. The minimum displacement is 2 nm in 1 mV, which indicates that this magnetic actuator can be useful for nano meter activations for nano science and technology. The other is the actuator, which is applied uniaxial stress to the Terdfenol-D. This is 20×20×20 mm size and the activation length is 11 μm.The electric power generation system was also designed by means of the magnetic flux density change due to the magnetostriction. With exerting an impulsive force of 80 N, 24 mW electricity was generated. This generator is considered to be useful for the generator for the sensors or auxiliary lights of motorcars and trains.
著者
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Sasaki Kenta
Department Of Bio- And Geosciences Graduate School Of Science Osaka City University
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Sakon Takuo
Department Of Mechanical Engineering Graduate School Of Engineering And Material Research Akita Univ
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Kamiya Osamu
Department Of Mechanical Engineering Faculty Of Engineering And Resource Science Akita University
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HOSOKAWA Tomohiro
Department of Physics,Graduate School of Science,Tohoku University
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MUZZAKIR Ahmad
Department of Mechanical Engineering, Graduated School of Engineering and Resource Science, Akita University
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YAGI Ryosuke
Department of Mechanical Engineering, Graduated School of Engineering and Resource Science, Akita University
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NOOR Mohamad
Department of Mechanical Engineering, Graduated School of Engineering and Resource Science, Akita University
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SAKON Takuo
Department of Mechanical Engineering, Graduated School of Engineering and Resource Science, Akita University
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Sakon Takuo
Department of Mechanical and Systems Engineering, Faculty of Science and Technology, Ryukoku University, Otsu 520-2194, Japan
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HOSOKAWA Tomohiro
Department of Bioresources Science, Faculty of Agriculture, Kochi University
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KAMIYA Osamu
Department of Mechanical Engineering, Graduated School of Engineering and Resource Science, Akita University
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SASAKI Kenta
Department of Mechanical Engineering, Graduated School of Engineering and Resource Science, Akita University
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