What is magnetostriction effect explain with neat diagram?
Principle: When a rod of ferromagnetic material like nickel is magnetized. Longitudinally, it undergoes a very small change in length. This is called Magnetostriction effect. Construction: The circuit diagram of magnetostriction ultrasonic generator is as shown in the figure1.
What is the principle of magnetostriction method?
It works under the principle of Magnetostriction effect. When a ferromagnetic rod is kept in an alternating magnetic field the rod is set into longitudinal vibrations, this happens due to change in the length of the rod. This longitudinal vibrations, result in the formation of ultrasonic waves at resonance.
What is magnetostriction effect in ultrasonics?
Magnetostriction effect: When a ferromagnetic rod like iron or nickel is placed in a magnetic field parallel to its length, the rod experiences a small change in its length. This is called magnetostriction effect.
Where is magnetostriction used?
A changing magnetic field can also be used in conjunction with magnetostrictive materials to produce vibrations. Such materials are used in medical devices and industrial vibrators, ultrasonic cleaning devices, underwater sonar, vibration or noise control systems, and in many other applications.
What is meant by Villari effect?
The inverse magnetostrictive effect, magnetoelastic effect or Villari effect is the change of the magnetic susceptibility of a material when subjected to a mechanical stress.
What is magnetostriction ultrasonic generator?
When magnetic field is applied across the length of a ferromagnetic rod such as Nickel, then change in the length of rod is observed. This is called Magnetostriction. The charge in length is propotional to the strength of megnetic field.
What is magnetostriction oscillator?
Definition of magnetostriction oscillator : an electric oscillator in which the frequency is controlled by the mechanical vibrations induced in a body by magnetostriction.
What is magnetostriction structure?
Magnetostriction (cf. electrostriction) is a property of magnetic materials that causes them to change their shape or dimensions during the process of magnetization.
What is magnetostriction in transformer?
Magnetostriction is a phenomenon occurring in transformer core in normal operation mode. Yet in time, it can cause the delamination of magnetic core resulting in higher level of vibrations that are measured on the surface of transformer tank during diagnostic tests.