This document discusses inductive transducers, specifically Linear Variable Differential Transformers (LVDTs). LVDTs are inductive transducers that measure displacement as a change in voltage by detecting changes in inductance caused by physical motion. They work by converting physical motion into a change in inductance based on factors like the number of turns, geometry, and permeability of magnetic materials. LVDTs have advantages like high sensitivity, ability to operate at high frequencies, lack of sliding contacts, and low power consumption, but disadvantages such as requiring large displacements, sensitivity to stray magnetic fields and vibrations, and performance changes with temperature.

1. INDUCTIVE TRANSDUCER

2. INTRODUCTION
Inductive transducer work on the
principle of inductance change due to
any appreciable change in the quantity
to be measured .
I.e. measured. For example, LVDT, a
kind of inductive transducers, measures
displacement in terms of voltage
difference between its two secondary
voltages.

3. LVDT
 An inductive transducer is a device that
converts physical motion into a change
in inductance.
Number of turns
Geometric configuration
Permeability of the magnetic
material or magnetic circuits.

4. CONSTRUCTION

5. VARIABLE INDUCTANCE
TRANSDUCERS
Inductance is a measure that relates
electrical flux to current .
Inductance reactance is a measure of the
inductive effect can be expressed as,
X=2 PIE FL
Where X is the inductive reactance in
ohms, f is the frequency of the applied
voltage in HZ and L is the inductance in
henry s.

6. PRINCIPLE
 Change of self inductance
 Change of mutual inductance
 Production of eddy current

7. LVDT DIAGRAM

8. ADVANTAGES
 LVDT has high sensitivity. it usaually
varies from 10 mv/mm to 40 v/mm.
 LVD T can be used on high frequencies
upto 20 KHz.
 Absence of sliding contact makes LVDT,
a more reliable device.
 Most LVDTs consume less than 1 W of
power.

9. DISADVANTAGES
 Large displacement are required for
differential output.
 They are sensitive to stray magnetic
fields.
 Sometimes, the transducer performance
is affected by vibrations.
 Temperature affects the performance of
the transducer.

10. THANK YOU…