Abstract
In this work a magnetoelectric (ME) current sensor design based on a magnetoelectric effect is presented and discussed. The resonant and non-resonant type of ME current sensors are considered. Theoretical calculations of the ME current sensors by the equivalent circuit method were conducted. The application of different sensors using the new effects, for example, the ME effect, is made possible with the development of new ME composites. A large number of studies conducted in the field of new composites, allowed us to obtain a high magnetostrictive-piezoelectric laminate sensitivity. An optimal ME structure composition was matched. The characterization of a non-resonant current sensor showed that in the operation range to 5 A, the sensor had a sensitivity of 0.34 V/A, non-linearity less than 1% and for a resonant current sensor in the same operation range, the sensitivity was of 0.53 V/A, non-linearity less than 0.5%.
Highlights
Current sensors are very important types of devices
Magnetoelectric current sensor consists of a ME element made in the form of the piezoelectric current consists of a ME
The ME non-resonant current sensor consists of three major parts: the the sensing sensing head head
Summary
Current sensors are very important types of devices. There are a large number of current sensors operating on various physical principles. In a magnetostrictive-piezoelectric layered structure the interaction between magnetic and electric subsystems occurs through mechanical deformation. It means that the ME effect is much stronger at frequencies corresponding to the electromechanical resonance range. 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. The properties of non-resonant ME current sensors were considered in [7,8], and of the resonant ones in [9]. 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 the resonant type, working in one excited mode in the piezoelectric phase of magnetoelectric material. It should be noted that the paper describes the construction and characteristics of the ME current sensors used in practice
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