多質点系磁歪式振動発電デバイスの最適設計

抄録

　We are conducting research on the practical application of vibration power generation using magnetostrictive materials (Fe-Ga). The power generator, consisting of magnetostrictive material, U-shaped frame, coil and permanent magnet, has a simple structure and high output characteristics. However, vibration power generation is difficult to put to practical use because of the presence of environmental vibrations with multiple frequencies. The conventional generator is a single mass system, and when the frequency of the vibration source matches the resonant frequency of the generator, a large amount of power can be generated. For this reason, it is difficult to generate power efficiently when there are multiple vibration frequencies. Therefore, in this paper, we propose a generator for multi-mass point systems. The parameters are derived by optimization calculations to match the two natural frequencies of the generator to the target frequencies, and the evaluation of the power generation characteristics under real vibration is reported.