In this article you will discover What is the working principle of LVDT?, What is a differential transformer?, What is the moving part of a linear variable differential transformer?
What is the working principle of LVDT?
The operating principle of the LVDT (linear variable differential transformer) is based on the variation of the inductance in three coils wound on an old cylindrical one. The LVDT consists of a primary coil excited by an AC voltage, and two secondary coils wound in opposing series on either side of the primary coil. When a ferromagnetic core moves within the transformer core, it changes the magnetic coupling between the primary and secondary coils, inducing voltages in the secondary coils. The phase and amplitude of these induced voltages change linearly with core position, providing precise displacement measurements.
What is a differential transformer?
The principle and work of an LVDT is based on electromagnetic induction. As the ferromagnetic core moves within the transformer core, it changes the magnetic coupling between the primary and secondary coils, leading to variations in the induced voltages across the secondary coils. These voltage changes are linearly proportional to the displacement of the core, allowing precise position detection and measurement.
What is the moving part of a linear variable differential transformer?
The working principle of an LVDT, as expressed in multiple choice questions (MCQs), generally revolves around the relationship between the movement of the ferromagnetic core and the voltages induced in the secondary coils. MCQs can cover topics such as the linear relationship between center displacement and output voltage, the phase relationship between primary and secondary voltages, and factors affecting the sensitivity and linearity of LVDT measurements.
The law of LVDT refers to the linear relationship between the displacement of the ferromagnetic core and the output voltage of the LVDT. According to this law, the voltages induced in the secondary coils of the LVDT vary linearly with the displacement of the core in the transformer core. This linear relationship allows for accurate and precise measurement of linear displacement across a wide range of applications.
We hope this overview for What is the working principle of LVDT? made things clearer.