Question

(b) Explain the neutral position and hence compose the transfer characteristics graph of the LVDT [6 Marks] Enter your answer 7 Question LO1-PO2-C4 Explain the operation of a rheostat as a linear displacement transducer with a neat sketch. [5 Marks]

Answer 1

# Luot (Linear yoltuge differential Transformer) LUDT has one primary winding and two fecondary winding Secondary windings are connected in series Oppositon iyon cove. 1 vin Vout primary pecondary coil coil # Neuhol position- Neutral position means position of movable inon core is such that voltage produce in both secondary winding is equal Ei= Ez Vout - E1-E220 Yout = volt, at nertsol position. when ison core moves toward top position, then yoltage induced in upper winding will be more EIXE2 Yout= E,-E2 Vouto

# when iron core moves down, voltage indured in lower winding will be more. E27 E1 Yout : EI-E Vout to * Transfer characterstics for transfer characterstics, magnitude of output voltuge with movement of cove displacement is drawn Vout Emax Somoy in Output voltage. 100% -100% I null Cove position position % of full range of core. Edc •+Eac -100% +100% +-Edc core position movement