Linear Variable Differential Transformer (LVDT)

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16 Questions

LVDT is a type of transformer.

False

LVDT is a type of inductive transducer.

True

LVDT contains electronic components inside it.

False

LVDT measures physical quantities directly without the need for a primary transducer.

False

LVDT consists of a primary coil wound over the whole length of a ferromagnetic cylinder.

False

LVDT's electrical output is obtained due to the difference in primary voltages.

False

The primary winding is connected to a DC source, not an AC source.

False

The iron core inside the former is generally of low permeability.

False

The LVDT is placed inside an aluminum housing for electrostatic and electromagnetic shielding.

False

The amplitude of the differential output voltage (Va-Vb) is not proportional to the core position.

False

The phase shift of (Va-Vb) with reference to the excitation determines the direction towards the zero position.

False

The null position is defined as the core position where the phase shift of the (Va-Vb) differential output is 180 degrees.

False

The differential output between the two secondary outputs (Va-Vb) when the core is at null position is called the Null Voltage.

True

The residual voltage, known as quadrature voltage, is high due to the simple nature of the LVDT electrical model.

False

AC excitation of 20-25 Volts at a frequency of 40-350Hz is applied to the primary winding.

False

The working principle of LVDT is based on Faraday's law of electromagnetic induction.

True

Test your knowledge about the working principle and application of the Linear Variable Differential Transformer (LVDT) as an inductive transducer for measuring speed or position of an object.

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