This post highlights about What does a differential transformer do?, What is the use of differential transformer?, Why LVDT is called differential?
What does a differential transformer do?
A differential transformer is a type of transducer that converts mechanical displacement into an electrical signal. It consists of a primary coil and two secondary coils wound on a cylindrical core, with the secondary coils connected in opposition in series. When a ferromagnetic core attached to the object being measured moves through the transformer coils, it induces voltage changes in the secondary coils. The voltage difference between the two secondary coils is proportional to the displacement of the core, providing a differential output signal that accurately represents the displacement.
What is the use of differential transformer?
The primary use of a differential transformer is in applications requiring precise measurement of linear displacement or position. Due to its high sensitivity, precision and reliability, the differential transformer, often referred to as LVDT (Linear Variable Differential Transformer), finds extensive use in industries such as aerospace, automotive, manufacturing and robotics. It is commonly used in position sensing, motion control systems, automated machinery and instrumentation where accurate displacement measurements are essential for operation and control.
Why LVDT is called differential?
LVDT, or linear variable differential transformer, is called differential because it produces a differential output signal proportional to the displacement of its core. The LVDT consists of two secondary coils wound oppositely in series, which means that the output voltage is the algebraic difference between the voltages induced in the two secondary coils. This differential output configuration provides several benefits, including increased sensitivity to displacement, improved linearity, and greater immunity to external electromagnetic interference.
Yes, a differential transformer, specifically an LVDT (Linear Variable Differential Transformer), is a type of variable inductance transducer. It works on the principle of electromagnetic induction, where the movement of a ferromagnetic core in its coils induces changes in the inductance of the transformer windings. The LVDT converts mechanical displacement into an electrical signal by precisely measuring changes in inductance, resulting in a linearly proportional output voltage. This makes LVDTs well suited for applications requiring precise and reliable sensing or displacement measurement.
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