A Current Sensing Device Based on Magnetic Convergence Effect of Magnetoelectric Laminated Materials

Abstract

The present invention provides a current sensing device based on the magnetic convergence effect, comprising a protective shell, a fixed base, a magnetic convergence substructure located on the fixed base, and a permanent magnet located at the bottom of the magnetic convergence substructure. The magnet, the mass block and the magnetoelectric laminated material respectively located above the magnetic convergence substructure, and the current-carrying wire located on the lower surface of the magnetoelectric laminated material. Through the above design, the present invention solves the problems of low sensitivity and linearity of the existing sensing device, complex structure of the sensing device, difficulty in installation, fixed DC bias magnetic field, difficult adjustment, and non-adjustable structure resonance frequency. The invention has simple structure and high reliability, adjusts the structural resonant frequency to the vicinity of the current frequency, obtains greater output sensitivity, not only makes the DC bias magnetic field adjustable, and can meet the optimal bias magnetic field of different magnetoelectric materials, but also The resonant frequency can be adjusted to meet the requirement of greater sensitivity in measuring currents of different frequencies.

Description

technical field [0001] The invention belongs to the field of current sensing, in particular to a current sensing device based on a magnetoelectric laminated material based on a magnetic convergence effect. Background technique [0002] Magnetoelectric materials with magnetoelectric effect can realize the mutual conversion of magnetic energy and electrical energy, and are widely used in the field of current sensing. The magnetoelectric effect is a phenomenon in which a material generates a polarized electric field under the action of an external magnetic field or induces magnetization in an external electric field. The magnetoelectric laminated material is composed of a ferromagnetic material with magnetostrictive properties and a piezoelectric material with piezoelectric effect. Through Magneto-mechanical-electric coupling realizes magnetoelectric conversion. Its appearance overcomes the shortcomings of single-phase magnetoelectric materials such as low magnetoelectric coeff...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a magnetoelectric laminate current sensing device based on the magnetic convergence effect, which solves the problem of low sensitivity and linearity, complex structure and difficult installation of the existing sensing devices. , Set the magnetic field to a fixed value, it is difficult to adjust, and the problem that the vibration frequency cannot be adjusted

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