Abstract
The aim of this paper is to design a combination of a magnetoelectric-electromagnetic (ME-EM) vibration converter in order to reach an improved energy outcome. In this paper, the influence of magnets polarization and magnetoelectric transducer and coil direction are investigated. For this purpose, a finite element model is developed using one coil, one ME transducer in a magnetic circuit. Simulation results show that a better magnetic field distribution and variation is reached, if the magnetic circuit magnets are placed in attraction. Radial polarization shows decisive advantages in comparison with axial polarization. The placement of coil parallel to the magnetic circuit direction and the magnetization of the ME transducer along its width is the optimal direction relative to the magnetic circuit.
Highlights
Different techniques are used to harvest energy from vibration sources, such as electrostatic, electromagnetic [1,2,3], piezoelectric [4,5,6], and magnetoelectric [7,8,9,10]
Such devices require high reliability for long life time to be implemented in real applications
A deformation will occur on the magnetostrictive layers due to the magnetic field change. This will be transmitted and applied to the piezoelectric layer placed between two MS layers as a stress, which will lead to generate an induced voltage through it (Fig. 1(b))
Summary
Different techniques are used to harvest energy from vibration sources, such as electrostatic, electromagnetic [1,2,3], piezoelectric [4,5,6], and magnetoelectric [7,8,9,10]. A high energy output can be only reached by an optimized harvester design taking the parameters of the available vibration into account. Such devices require high reliability for long life time to be implemented in real applications. In 2006, Shahruz developed multi piezoelectric converter using cantilevers with different size to reach bandwidth converters with high energy outcome [14]. The realization of this system is complex and is not enough reliable to ensure long life time for the converter
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