Abstract: he benefits of LVDT include high reliability, high accuracy and good linearity, so it has been widely utilized in the servo system. But the traditional design cycle is long and the cost is high, it’s difficult to design the good linearity sensor in a short time. To solve the above problems, a method that how to use Maxwell to establish the sensor model is presented. According to the advantages of changing size quickly by Maxwell, the compensation coil’s windings are simulated which impact the performance of sensor. By the verification of experiment, this modle can effectively simulate the real product. These methods significantly improve the design efficiency and lineaity in the actual project.

Key words: Variable differential transformer, Displacement sensor, Simulation, Model