Sketch and describe the working principle of LVDT.

Sketch and describe the working principle of LVDT.
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1 Answer

Answer :

Diagram

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Explaintion: LVDT is the example of inductive transducer, in LVDT any physical displacement of the core cause the voltage of any secondary winding to increase while simultaneously reducing the voltage in the other secondary winding. The difference of the two voltages appears across the output terminal of the transducer and gives a measurement of the physical position of the core.

Construction of LVDT:

A differential transducer consists of a primary winding and two secondary winding. The windings are arranged concentrically and next to each other. They are wound over a narrow bobbin which is usually of a non- magnetic and insulating material. A core in the shape of road is attached to the transducer sensing a shaft. An AC source is applied across the primary winding and core varies the coupling between it and two secondary windings. .:E0=E1-E2

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