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In order for vibration energy harvesters to be efficiently applicable over a range of source frequencies, recently much research has been done to broaden the frequency range of the harvesters using piezoelectric, electromagnetic and electrostatic transductions, but little has been investigated in the harvesters using magnetoelectric transducers. In this paper, a new broadband vibration energy harvester...
This paper presents a new high-efficiency ME composite transducer consisting of magnetostrictive Terfenol-D arrays, piezoelectric PZT arrays and a substrate. Magnetostrictive resonant unidirectional transducer (MRUDT) array groups and a piezoelectric unidirectional transducer (PUDT) array group are created inside the transducer while propagating the unidirectionality required for low loss and converting...
The magnetoelectric (ME) effect of magnetostrictive Terfenol-D (Tb1-xDyxFe2-y) and piezoelectric Pb(Zr1-xTix)O3 plates bonded on a beryllium bronze substrate is reported. The substrate severs as frequency determining element and dominates the Q-factor of the oscillator. The device can be regard as a driven damped system. Its resonance occurs at multi-modes when the Terfenol-D plate oscillates at frequencies...
This paper presents a new scheme of self-powered sensor by collecting electromagnetic energy. A unidirectional transducer group and an inhomogeneous piezoelectric structure are created inside the transducer while propagating the unidirectionality required for low loss and receiving the convergent acoustic wave with higher power output. The acoustic waves may be converged by modifying the angle of...
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