Answer Posted / 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
Is This Answer Correct ? | 12 Yes | 1 No |
Post New Answer View All Answers
What is the effect on Power factor and capacitor when your company load is more than 70 % of welding transformer
As we use capacitor bank in 3ph ckt to improve PF, can we use capacitor in single ph domestric use, in house we have Fan,Mixer,electric cooker,iron,tube choke they also lag the system,because it is inductive load. if it is possible to improve PF of single ph system-- if yes- type of capacitor to be used,connection diagram, working in detail. if no-- list it.
How you will determine the volume of oil in a particular Distribution transformer.
What is the difference between amorphous core transformer and CRGO core transformer?.
How to select the proper VSD to operate high inertial load
how are reversing the direction of rotation of dc motor
What is systematic error?
can u please mail me the syllabus for GET exam for damodar valley corporation?
What is the main purpose of c.f.b.c.boiler
How equivalent impedance is calculated in thevenin theorem?
why capacitive load is not used in routine life????any reason is there ??????
what is the current setting for different relay protection for transformer .
what are all types of cross section in AC cables?
why dc is used in control circuit for mv & hv switchgear instead of ac
I need to connect a synchronous generator to the grid using automatic synchronization and two circuit breakers (one for synchronization, one for end connection to the grid), how to determinate the required diameter of the cables?