The working principle of piezoelectric inductor is piezoelectric effect. Piezoelectricity began in Greek piezein, which literally means squeezing or tapping. As the latter implies, we are squeezing the quartz crystal to create the operating voltage. Therefore, the working principle of the piezoelectric inductor is to increase the mechanical kinetic energy of the crystal, and the operation steps are as follows.
1. Piezoelectric crystals are placed between two metal plates, which are generally in perfect balance (even if they are not in symmetrical order), and will not transmit all the current.
2. The metal sheet increases the mechanical stress or force on the raw material, driving the charge imbalance in the crystal. Too many negative and positive charges appear on the opposite side of the crystal surface.
3. The metal plate collects this charge, which is suitable for creating the working voltage and pushing the current through the power circuit - converting it into piezoelectric.
When confirming piezoelectric effect, it is very important to master the behavior of piezoelectric crystal. Piezoelectric inductor based on piezoelectric effect can work from transverse, vertical or shear stress, and has low sensitivity to electromagnetic field and electromagnetic wave radiation. In a wide range of ambient temperatures, its response is also very linear, so it is an ideal sensor for harsh environments.