Small-signal modeling and optimal operating condition of magnetostrictive energy harvester

Magnetostrictive energy harvesting has drawn attention in recent years for its high conversion efficiency and environmental durability. harvesters are mainly composed of giant magnetostrictive material, a magnetic circuit, an electric which involves complex mechanical-electromagnetic coupled problems. Therefore, many studies, the analysis such device was implemented by finite element method. However, numerical calculation generally requires great deal time does not provide adequate physical understanding effect design parameters on harvester characteristics. In previous have been operated under small-signal vibration imposed over constant prestress bias. operating conditions, linearized models can be used to derive important analytical expressions characteristics their dependency parameters. This paper presents modeling using constitutive equations. The loss due eddy currents is also considered high-frequency application. influence parameter variation output power investigated from algebraically obtained power, existence optimal value resistance capacitance circuit discussed. These presented form algebraic solution. finally proven fit with experimental results when appropriate permeability given. • Output non-inertial independent elastic compliance. Optimal maximum constant. Optimized RC harvest more than pure harvester.