Great enhancement of energy harvesting properties of piezoelectric/magnet composites by the employment of magnetic concentrator

Wireless sensors capable of scavenging energy from ambient environment have been increasingly attractive for their outstanding merits of self-sufficient and maintenance-free. This paper presents a specific design of magnetic energy harvester based on a piezoelectric/magnet composite and a magnetic concentrator. With the employment of concentrator, the energy harvesting properties have been greatly improved, which is theoretically analyzed and experimentally demonstrated with the 35 times power enlargement. The fabricated prototype with a 3 cm air-gap concentrator harvests 326 μW power at 10 Arms, which enables sufficient and reliable power supply for a wide range of low-power sensors.

[1]  Kai Xu,et al.  Giant magnetoelectric torque effect and multicoupling in two phases ferromagnetic/piezoelectric system , 2011 .

[2]  C. Nan,et al.  Multiferroic Magnetoelectric Composites: Historical Perspective, Status, and Future Directions , 2008, Progress in Advanced Dielectrics.

[3]  S. Dong,et al.  Colossal low-frequency resonant magnetomechanical and magnetoelectric effects in a three-phase ferromagnetic/elastic/piezoelectric composite , 2012 .

[4]  Gerhard P. Hancke,et al.  Industrial Wireless Sensor Networks: Challenges, Design Principles, and Technical Approaches , 2009, IEEE Transactions on Industrial Electronics.

[5]  Jitao Zhang,et al.  Energy harvesting from electric power lines employing the Halbach arrays. , 2013, The Review of scientific instruments.

[6]  D. Viehland,et al.  Giant magnetoelectric effect in Pb(Zr,Ti)O3-bimorph/NdFeB laminate device , 2008 .

[7]  Chunli Zhang,et al.  Harvesting magnetic energy using extensional vibration of laminated magnetoelectric plates , 2009 .

[8]  P. Wright,et al.  Resonance tuning of piezoelectric vibration energy scavenging generators using compressive axial preload , 2006 .

[9]  Qiliang Xu,et al.  Electromechanical Energy Scavenging From Current-Carrying Conductors , 2013, IEEE Sensors Journal.

[10]  R. O'handley,et al.  Improved Wireless, Transcutaneous Power Transmission for In Vivo Applications , 2008, IEEE Sensors Journal.

[11]  Kai Xu,et al.  Investigation of low frequency giant magnetoelectric torque effect , 2013 .

[12]  Miao Yu,et al.  Piezoelectric energy harvester scavenging AC magnetic field energy from electric power lines , 2013 .

[13]  M. G. Prasad,et al.  A vibration energy harvesting device with bidirectional resonance frequency tunability , 2008 .

[14]  Shan X. Wang,et al.  Magnetic energy harvesting properties of piezofiber bimorph/NdFeB composites , 2014 .

[15]  David P. Arnold,et al.  Wireless power transmission to an electromechanical receiver using low-frequency magnetic fields , 2012 .