Can someone explain the basics of reverse magnetostriction ?

[Externet]

Hi.

I believe I do understand the 'normal' magnetostriction, when transformer core materials shrink/expand mechanically with their exposure to magnetic fields, but have difficulty in how minute compressions/expansions may generate enough electricity to consider it viable as power generation.

 

----> http://earthtechling.com/2013/05/doing-wave-energy-with-no-moving-parts/

 

----> http://www.greenpatentblog.com/2015/12/01/oscillas-power-bars-generate-energy-from-waves/

 

Light, please ?

[Bender]

If the magnetic flux through a coil changes, this creates a voltage in the coil.

 

Same as in an alternator really, but here the changing flux is caused by the special magnetostrictive material rather than a rotating magnet.