Answer / md ahmeduddin farooqi

The linear variable differential transducer (LVDT) is a type
of electrical transformer used for measuring linear
displacement. The transformer has three solenoidal coils
placed end-to-end around a tube. The centre coil is the
primary, and the two outer coils are the secondaries. A
cylindrical ferromagnetic core, attached to the object whose
position is to be measured, slides along the axis of the tube.

An alternating current is driven through the primary,
causing a voltage to be induced in each secondary
proportional to its mutual inductance with the primary. The
frequency is usually in the range 1 to 10 kHz.

As the core moves, these mutual inductances change, causing
the voltages induced in the secondaries to change. The coils
are connected in reverse series, so that the output voltage
is the difference (hence "differential") between the two
secondary voltages. When the core is in its central
position, equidistant between the two secondaries, equal but
opposite voltages are induced in these two coils, so the
output voltage is zero.

When the core is displaced in one direction, the voltage in
one coil increases as the other decreases, causing the
output voltage to increase from zero to a maximum.

LVDTs are commonly used for position feedback in
servomechanisms, and for automated measurement in machine
tools and many other industrial and scientific applications

Answer / vsasikumar

The linear variable differential transducer (LVDT) is a type
of electrical transformer used for measuring linear
displacement. The transformer has three solenoidal coils
placed end-to-end around a tube. The centre coil is the
primary, and the two outer coils are the secondaries. A
cylindrical ferromagnetic core, attached to the object whose
position is to be measured, slides along the axis of the
tube.

An alternating current is driven through the primary,
causing a voltage to be induced in each secondary
proportional to its mutual inductance with the primary. The
frequency is usually in the range 1 to 10 kHz.

As the core moves, these mutual inductances change, causing
the voltages induced in the secondaries to change. The coils
are connected in reverse series, so that the output voltage
is the difference (hence "differential") between the two
secondary voltages. When the core is in its central
position, equidistant between the two secondaries, equal but
opposite voltages are induced in these two coils, so the
output voltage is zero.

When the core is displaced in one direction, the voltage in
one coil increases as the other decreases, causing the
output voltage to increase from zero to a maximum.

LVDTs are commonly used for position feedback in
servomechanisms, and for automated measurement in machine
tools and many other industrial and scientific applications

what is differnce between grounding and earthing or both are same?

3 Answers  

---

What is marx circuit?

0 Answers  

---

what happen when generator neutral supply and transformer neutral supply linked

3 Answers  

---

if our load is 65000 watts howcan we find out all char like cable size. mcccb etc

3 Answers  

---

For an 100kw generator, only 50kw of load is connected. Will the generator generate only 50kw or 100kw. If it generate 100kw what happens to rest of the 50kw. What happens if we connect more than 100kw of load?

2 Answers   L&T,

---

Explain using drawings what is reverse PID action w.r.t PID controllers.

0 Answers   L&T,

---

why we use the 100% and 95% stator earth fault protection for the synchronus generator ?

0 Answers   Operational Energy Group,

---

What will happend if given Vfd out put to step up transformer

0 Answers  

---

For Electrical / and Electronic Systems, when we say efficiency is 80%, then what happens to other 20% from the Power consumption.? I.e. what happens to this?

1 Answers  

---

What is the acceptance value of leakage current in HI POT test

2 Answers   CPCL,

---

Why only plate(copper) Earth pit given for neutral earthing? why not pipe(G.I) Earth pit?

1 Answers  

---

What is mean by hot and cold loop testing? What is the difference between them?

0 Answers  

---