Output Characteristics of Double Coil Fe-Ga Alloy Transducer
Weng Ling1,2, Cao Xiaoning1,2, Hu Xiuyu1,2, Huang Wenmei1,2, Wang Bowen1,2
1.State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China; 2. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei ProvinceHebei University of Technology Tianjin 300130 China
Abstract：In order to investigate the variation law of strain and output energy of Fe-Ga alloy at different magnetic field frequencies, the double-pole coil Fe-Ga alloy transducer was designed and the static and dynamic output characteristics of the Fe-Ga alloy transducer were studied. Based on the finite element method, the magnetic field distribution of the Fe-Ga rod alloy on the transducer was calculated at different frequencies. The change of electromagnetic energy, magnetic energy storage and output mechanical energy of the Fe-Ga alloy transducer at different magnetic field frequencies is analyzed using the conversion relationship between magnetic energy and mechanical energy. The results show that with the increase of magnetic field, the static output strain and the output displacement of Fe-Ga alloy transducer firstly increase linearly and then tend to saturation. The maximum strain of the static output of Fe-Ga alloy transducer is 80×10-6, the maximum output displacement is 3×10-6 m. The magnetic field of the top and bottom ends of Fe-Ga rod alloy is larger and decreases with the increasing of frequency. The magnetic field of the middle part of Fe-Ga rod alloy is smaller but evenly distributed and increases with the increasing of frequency. The dynamic displacement curves of Fe-Ga alloy transducer are butterfly curves. When the frequency is 50 Hz, the mechanical energy of the Fe-Ga alloy transducer is maximum 69.598 J/m3.
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2018, Vol. 33 
