5/24/2023 0 Comments Newslife magnetoelectricOutput characteristics of the ME non-resonant current sensor. The electrical signal is taken from the electrodes (4) and then passes on to the signal processing part of the device. To increase the sensitivity, different numbers of Metglas layers may be used. The thickness of the adhesive layer does not exceed 10 microns. Metglas (1) and PZT (3) plates are connected by gluing (2). Thickness of one layer of Metglas was 0.02 mm. The electrodes are applied on two sides of the magnetostrictive plates. The piezoelectric was polarized in the thickness direction. The layered structure based on a piezoceramic PZT plate in our case had thickness of 0.38 mm, length of 10 mm and width of 1 mm. The ME element is the sensitive part of a ME current sensor and in our case, it consists of piezoelectric and magnetostrictive layers as shown in Figure 3. The ME element, shown in Figure 3, is the primary part of the whole current sensor, and its function is to convert the measuring current into the voltage signal that can be measured easily. It should be noted that the paper describes the construction and characteristics of the ME current sensors used in practice. In the paper we consider the basic principles of work of ME DC sensors of non-resonant type based on using the low-frequency ME effect and next the resonant type, working in one excited mode in the piezoelectric phase of magnetoelectric material. The properties of non-resonant ME current sensors were considered in, and of the resonant ones in. The same ME element can be used as the sensitive element of the sensor in both cases. In the first case, the ME element works in a non-resonant mode regime, and in the second case, in the resonant one. ME current sensors can work in different regimes. In current sensor applications the induced ME voltage coefficient is more important than the induced ME electric field coefficient, as voltage is the physical quantity measured. It means that the ME effect is much stronger at frequencies corresponding to the electromechanical resonance range. In a magnetostrictive-piezoelectric layered structure the interaction between magnetic and electric subsystems occurs through mechanical deformation. ME behavior exists as a composite effect in multiphase systems of piezoelectric and magnetostrictive materials. As is well-known, the ME effect is a polarization response to an applied magnetic field, or conversely a magnetization response to an applied electric field. The ME current sensor uses the ME effect as a basis of its measurements. Evaluation of the value of current flowing in a conductor is possible by measuring the corresponding magnetic field. There are also a number of articles about ME current sensors. The first attempt to measure the direct current (DC) based on the ME effect was made in. Despite the fact that magnetoelectric (ME) current sensors have the small size, weight and a high sensitivity they have received relatively little attention in the publications, compared with the ME magnetic field sensors. The most common current sensors are current transformers, magnetoresistance and Hall sensors. There are a large number of current sensors operating on various physical principles. Current sensors are very important types of devices.
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