How can I couple Electrical field and magnetic field from Piezoelectric and Magnetostrictive materials?
You could make a expansioner/contractor that feeds into a piezoelectric charger, but it would operate at a very low voltage, so many would need to be series to get a charge, but still operate at a very low power, so many would need to be connected in parallel to power the battery.
Dear Dibyajyoti,
Translation and rotation of a permanent magnet, using a choice of piezoelectric (fiber composite and bulk PZT) and magnetostrictive (amorphous FeSiB ribbon and bulk Terfenol) materials research has been done earlier. Just example is Integrated micro-harvester (coupling devices of two material piezo and megnetostrictive) has been designed.
Coupling magnetostriction and piezoelectricity
Piezoelectric materials are not time dependant if “leaks” are neglected, and thus they may prove useful for our purpose. However, in order to produce high voltage, piezoelectrics require high stress over small displacements, provided through contact forces. Magnetostrictive materials can produce high stress to deform the piezoelectric over small deformations. They are compatible with small strain and can be “activated” remotely, via magnetic field interactions. In a variable magnetic field, a magnetostrictive material stretches or shrinks. When coupled to a piezoelectric, this deformation displaces electric charges in the material, thus achieving the electromechanical conversion. The various conversion stages are such as:
Mechanical energy …… to ……. strain in Magnetostrictive materials-
to strain in piezoelectric materials …… to …. Electric energy output of piezoelectric materials.
The coupling of these two materials allows energy conversion from magnetic/mechanic to electricity. The quasi-static motion of a permanent magnet near the magnetostrictive element can produce a relatively high voltage at the output of the piezoelectric element, regardless of the device’s scale. First, we investigate a device where the permanent magnet is translating. Second the permanent magnet rotates above the device, instead of translating. The magnetostrictive material’s properties and shape should not induce any preferential magnetization direction. When a permanent magnet rotates above the device, the easy axis in the metglass also spins. it was deduced that with a quasi-static rotation speed, even less than 1 rpm, it may still obtain the maximum voltage with the device coupled with a high impedance load. Coupling piezoelectric and magnetostrictive materials allows exploiting quasi-static phenomena.
Just refer this article.
http://cap.ee.ic.ac.uk/~pdm97/powermems/2011/Oral/1A-2.pdf
Hope my interpretation article help you out.
Ashish
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials