A vibration energy harvester using magnetostrictive/piezoelectric composite transducer

An energy harvester is presented to convert ambient mechanical vibration into electrical energy. The harvester consists of a cantilever beam, a magnetic circuit and a magnetostrictive/piezoelectric laminate magnetoelectric (ME) transducer. The magnetic circuit is arranged on the free end of the beam and produces a concentrated flux gradient. When the harvester is excited, the magnetic circuit moves relative to the ME transducer. The ME transducer undergoes magnetic field variations and produces a power output. The nonlinear vibration performances of the harvester are studied using the Lindstedt-Poincaré method, and the electrical-output performances of the harvester at resonance are analyzed. A prototype has been fabricated and tested. The experimental results are in agreement with the analytical results. The prototype produces a power of 2.11 mW for an acceleration of 1 g at frequency of 51 Hz.

[1]  H. M. Hu,et al.  Comparison of two Lindstedt–Poincaré-type perturbation methods , 2004 .

[2]  Joseph A. Paradiso,et al.  Energy scavenging for mobile and wireless electronics , 2005, IEEE Pervasive Computing.

[3]  Jiankang Huang,et al.  New high-sensitivity hybrid magnetostrictive/electroactive magnetic field sensors , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[4]  Shuxiang Dong,et al.  Longitudinal and transverse magnetoelectric voltage coefficients of magnetostrictive/piezoelectric laminate composite: theory , 2003, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[5]  M. Gasulla,et al.  A Review of Commercial Energy Harvesters for Autonomous Sensors , 2007, 2007 IEEE Instrumentation & Measurement Technology Conference IMTC 2007.

[6]  S. Beeby,et al.  Energy harvesting vibration sources for microsystems applications , 2006 .

[7]  Jan M. Rabaey,et al.  PicoRadio Supports Ad Hoc Ultra-Low Power Wireless Networking , 2000, Computer.