Friday 27 January 2012

Linear Variable Differential Transformer

Linear Variable Differential Transformer is used as inductive transducer to convert linear motion into electrical signals. The transformer consist of primary and two secondary windings wound on a cylinderical former. The secondary windings have equal number of turns and placed on either side of primary winding. The primary winding is alternatively connected to alternating current source. A movable soft iron core is inside former and displacement is measured with the help of movement of core.The output voltage obtained is the differential voltage of two secondary windings.
USES:
1. LVDT is used in all applications which include displacement ranging from fraction of mm to few cm.
2. It is used to measure force , weight and pressure etc.
3. Pressure of liquid in tank.