29 Questions
LVDT is an inductive transducer that converts linear motion into electrical signals.
True
LVDT is a type of Transformer.
False
LVDT contains electronic components inside it.
False
LVDT can directly measure physical quantities such as Force, Weight, Tension, and Pressure.
False
LVDT consists of a primary coil wound over the whole length of a ferromagnetic cylinder.
False
LVDT has a high accuracy level, making it widely used as an inductive sensor.
True
The ferromagnetic core magnetically couples the primary to the secondary winding turns.
True
The movable core inside the former is typically of low permeability.
False
The LVDT is placed inside a stainless steel housing for electromagnetic shielding.
True
The amplitude of the differential output voltage is directly proportional to the core's position.
True
The null position is defined as the core position where the phase shift of the differential output is 0 degrees.
False
When AC excitation of 5-15 Volts at a frequency of 50-400Hz is applied to the primary winding, a magnetic field is produced.
True
The null voltage is a 'quadrature' voltage with a high amplitude.
False
The induced voltages in secondary windings are proportional to the mutual current induced by the primary winding.
True
The LVDT's working principle is based on Faraday's law of electromagnetic induction.
False
The high-permeability ferromagnetic core helps in reducing harmonics and high sensitivity of LVDT due to its magnetic properties.
True
What type of transducer is an LVDT?
Inductive
What is the primary function of the high-permeability ferromagnetic core in an LVDT?
Reducing harmonics and increasing sensitivity
What is the main reason for LVDT being widely used as an inductive sensor?
High accuracy level
What type of electrical output is obtained from an LVDT?
Difference in secondary voltages
What is the material typically used for the core of an LVDT?
Ferromagnetic material
What is the primary function of a primary transducer in the context of an LVDT?
Convert physical quantities into displacement
What is the purpose of the high-permeability ferromagnetic core in an LVDT?
To reduce the harmonics and increase the sensitivity of the LVDT
What happens when an AC excitation of 5-15 Volts at a frequency of 50-400Hz is applied to the primary winding of an LVDT?
A magnetic field is produced
What defines the null position in an LVDT?
The core position where the phase shift of the differential output is 0 degrees
What is the amplitude of the differential output voltage in an LVDT directly proportional to?
The core's position
What do the secondary windings of an LVDT generate when the core is at null position?
'Quadrature' voltage with a high amplitude
What does the movable soft iron core inside an LVDT do?
Is displaced to be measured and connected to the iron core
Which materials are used for shielding an LVDT from electrostatic and electromagnetic interference?
Stainless steel
Test your knowledge about LVDT, the widely used inductive transducer that converts linear motion into electrical signals. Understand its working principle, categorization, and applications in measuring speed or position of an object.
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